RNAM / Avidity Biosciences, Inc. - SEC-Einreichungen, Jahresbericht, Proxy Statement

Avidity Biosciences, Inc.
DIESES SYMBOL IST NICHT MEHR AKTIV

Basisstatistiken
CIK 1599901
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Avidity Biosciences, Inc.
SEC Filings (Chronological Order)
Auf dieser Seite finden Sie eine vollständige, chronologische Liste der SEC-Einreichungen, mit Ausnahme der Eigentumseinreichungen, die wir an anderer Stelle bereitstellen.
March 9, 2026 15-12G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13

15-12G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number: 001-39321 Avidity Biosciences, Inc. (Exact name of registrant as spe

February 27, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 26, 2026 Avidity Bioscie

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 26, 2026 Avidity Biosciences, Inc. (Exact name of Registrant as specified in its Charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

February 27, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 27, 2026

S-8 POS As filed with the Securities and Exchange Commission on February 27, 2026 Registration No.

February 27, 2026 POSASR

As filed with the Securities and Exchange Commission on February 27, 2026

POSASR As filed with the Securities and Exchange Commission on February 27, 2026 Registration No.

February 27, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 27, 2026

S-8 POS As filed with the Securities and Exchange Commission on February 27, 2026 Registration No.

February 27, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 27, 2026

S-8 POS As filed with the Securities and Exchange Commission on February 27, 2026 Registration No.

February 27, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 27, 2026

S-8 POS As filed with the Securities and Exchange Commission on February 27, 2026 Registration No.

February 27, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 27, 2026

S-8 POS As filed with the Securities and Exchange Commission on February 27, 2026 Registration No.

February 27, 2026 EX-3.1

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION AVIDITY BIOSCIENCES, INC.

EX-3.1 Exhibit 3.1 AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF AVIDITY BIOSCIENCES, INC. 1. The name of the corporation is “Avidity Biosciences, Inc.” (the “Corporation”). 2. The address of the Corporation’s registered office is Corporation Service Company, 251 Little Falls Drive, Wilmington, New Castle County, Delaware 19808. Corporation Service Company is the Corporation’s registered ag

February 27, 2026 EX-3.2

BYLAWS AVIDITY BIOSCIENCES, INC. ARTICLE I

EX-3.2 Exhibit 3.2 BYLAWS OF AVIDITY BIOSCIENCES, INC. ARTICLE I OFFICES SECTION 1. Registered Office. The registered office of Avidity Biosciences, Inc. (the “Corporation”) shall be established and maintained at the office of Corporation Service Company, in the City of Wilmington, in the County of New Castle, in the State of Delaware, and said company shall be the registered agent of the Corporat

February 27, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 27, 2026

S-8 POS As filed with the Securities and Exchange Commission on February 27, 2026 Registration No.

February 27, 2026 POSASR

As filed with the Securities and Exchange Commission on February 27, 2026

POSASR As filed with the Securities and Exchange Commission on February 27, 2026 Registration No.

February 27, 2026 POSASR

As filed with the Securities and Exchange Commission on February 27, 2026

POSASR As filed with the Securities and Exchange Commission on February 27, 2026 Registration No.

February 26, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 26, 2026 Avidity Bioscie

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 26, 2026 Avidity Biosciences, Inc. (Exact name of Registrant as specified in its Charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

February 23, 2026 EX-21.1

Atrium Therapeutics, Inc.

Exhibit 21.1 Subsidiaries Entity Name State or Other Jurisdiction of Organization Avidity Biosciences Ireland Limited Republic of Ireland Atrium Therapeutics, Inc. Delaware

February 23, 2026 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2025 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number: 001-39321 AVIDITY BIOSCIENCES, INC.

February 23, 2026 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

February 23, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 23, 2026 Avidity Bioscie

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 23, 2026 Avidity Biosciences, Inc. (Exact name of Registrant as specified in its Charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

February 23, 2026 EX-99.1

Avidity Biosciences Announces Intention to Adjourn and Reconvene Special Meeting of Stockholders

EX-99.1 Exhibit 99.1 Press Release: Avidity Biosciences Announces Intention to Adjourn and Reconvene Special Meeting of Stockholders Avidity Biosciences Announces Intention to Adjourn and Reconvene Special Meeting of Stockholders SAN DIEGO, February 23, 2026 /PRNewswire/ — Avidity Biosciences, Inc. (“Avidity”) (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA th

February 18, 2026 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

February 13, 2026 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

February 3, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 2, 2026 AVIDITY BIOSCIENCE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 2, 2026 AVIDITY BIOSCIENCES, INC.

February 3, 2026 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

February 3, 2026 EX-99.1

Avidity Biosciences Announces Expected Record Date for

EX-99.1 Exhibit 99.1 Avidity Biosciences Announces Expected Record Date for Spin-Off SAN DIEGO, Feb. 2, 2026 /PRNewswire/ — Avidity Biosciences, Inc. (“Avidity”) (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therapeutics called Antibody Oligonucleotide Conjugates (“AOCs™”) to profoundly improve people’s lives, today announced that its board of directors has

January 30, 2026 DEFM14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Rule 14a-101)

DEFM14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

January 14, 2026 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. ) Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule14a-6(

January 12, 2026 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. ) Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule14a-6(

January 12, 2026 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

December 23, 2025 PRER14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Rule 14a-101)

PRER14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 22, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

December 18, 2025 EX-10.1

AVIDITY BIOSCIENCES, INC.

EX-10.1 Exhibit 10.1 AVIDITY BIOSCIENCES, INC. [NAME] Via Email Re: Accelerated Payments and Clawback Dear [NAME]: As you may be aware, Avidity Biosciences, Inc. (the “Company”) has entered into a definitive agreement pursuant to which the Company will be acquired by Novartis AG (the “Merger” and, such agreement, the “Merger Agreement”). This letter agreement (this “Agreement”) sets forth certain

December 18, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 14, 2025 Avidity Bioscie

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 14, 2025 Avidity Biosciences, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

December 18, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 14, 2025 Avidity Bioscie

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 14, 2025 Avidity Biosciences, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation

December 12, 2025 PRER14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Rule 14a-101)

PRER14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 8, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

November 24, 2025 EX-FILING FEES

Table 1: Transaction Valuation

Calculation of Filing Fee Tables Table 1: Transaction Valuation Proposed Maximum Aggregate Value of Transaction Fee Rate Amount of Filing Fee Fees to be Paid 1 $ 12,315,068,654.

November 24, 2025 PREM14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Rule 14a-101)

PREM14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 20, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

November 10, 2025 EX-99.1

Avidity Biosciences Reports Third Quarter 2025 Financial Results and Recent Highlights Announced Novartis agreement to acquire Avidity for total equity value of approximately $12 billion; Avidity expects to separate its early-stage precision cardiolo

Exhibit 99.1 Avidity Biosciences Reports Third Quarter 2025 Financial Results and Recent Highlights Announced Novartis agreement to acquire Avidity for total equity value of approximately $12 billion; Avidity expects to separate its early-stage precision cardiology programs into a new public company ("SpinCo") Clear path forward aligned with FDA following pre-BLA meeting for del-zota, with BLA sub

November 10, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2025 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-39321 Avidity Biosciences, Inc. (Exact

November 10, 2025 EX-10.2

Exhibit 10.2 Portions of this Exhibit have been redacted because they are both (i) not material and (ii) would be competitively harmful if publicly disclosed. Information that was omitted has been noted in this document with a placeholder identified

rna-20250930xex102xlonza Exhibit 10.2 Portions of this Exhibit have been redacted because they are both (i) not material and (ii) would be competitively harmful if publicly disclosed. Information that was omitted has been noted in this document with a placeholder identified by the mark “[***]”. Manufacturing Services Agreement (the “Agreement”) by and between Lonza LTD Münchensteinerstrasse 38 CH-

November 10, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 10, 2025 AVIDITY BIOSCIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 10, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

November 10, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

October 28, 2025 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. ) Filed by the Registrant ☐ Filed by a Party other than the Registrant x Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule14a-6(

October 28, 2025 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. ) Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule14a-6(

October 28, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

October 27, 2025 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. ) Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule14a-6(

October 27, 2025 EX-99.1

All Employee Q&A Day 1 For additional information not addressed in this document, we encourage you to speak with your manager, a member of the transition team led by Kat Lange, your HR partner and any member of the management team. We will share addi

EX-99.1 Exhibit 99.1 All Employee Q&A All Employee Q&A Day 1 For additional information not addressed in this document, we encourage you to speak with your manager, a member of the transition team led by Kat Lange, your HR partner and any member of the management team. We will share additional information as it becomes available. Deal Overview • What did Avidity announce? • Avidity has entered int

October 27, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 25, 2025 Avidity Bioscien

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 25, 2025 Avidity Biosciences, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39321   46-1336960 (State or other jurisdiction of incorporation or orga

October 27, 2025 EX-99.4

Investor-Analyst Email

EX-99.4 Exhibit 99.4 Investor-Analyst Email Subject: Avidity Enters Merger Agreement with Novartis [NAME / INSERT CUSTOMARY GREETING], Today Avidity announced that we have entered into a definitive merger agreement to be acquired by Novartis, under which Novartis will acquire our programs and pipeline in neuroscience and gain access to our RNA-targeting delivery platform. The agreement encompasses

October 27, 2025 EX-99.5

Local Policymakers and Officials E-mail

EX-99.5 Exhibit 99.5 Local Policymakers and Officials E-mail Subject: An Update on the Future of Avidity [NAME / INSERT CUSTOMARY GREETING], Just over ten years ago, Avidity was founded on the bold vision to profoundly improve people’s lives by delivering a new class of RNA therapeutics. Since then, we have made incredible strides as the first-ever company to successfully demonstrate the targeted

October 27, 2025 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. ) Filed by the Registrant ☐ Filed by a Party other than the Registrant ☒ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule14a-6(

October 27, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

October 27, 2025 EX-2.1

AGREEMENT AND PLAN OF MERGER DATED AS OF OCTOBER 25, 2025 NOVARTIS AG, AJAX ACQUISITION SUB, INC. AVIDITY BIOSCIENCES, INC.,

EX-2.1 Exhibit 2.1 AGREEMENT AND PLAN OF MERGER DATED AS OF OCTOBER 25, 2025 AMONG NOVARTIS AG, AJAX ACQUISITION SUB, INC. AND AVIDITY BIOSCIENCES, INC., Table of Contents ARTICLE 1 DEFINITIONS; INTERPRETATION 2 SECTION 1.1. Definitions 2 SECTION 1.2. Interpretation 19 ARTICLE 2 THE MERGER 20 SECTION 2.1. The Merger 20 SECTION 2.2. Effects of the Merger 20 SECTION 2.3. Closing 20 SECTION 2.4. Effe

October 27, 2025 EX-2.2

SEPARATION AND DISTRIBUTION AGREEMENT DATED AS OF OCTOBER 25, 2025 AVIDITY BIOSCIENCES, INC., BRYCE THERAPEUTICS, INC., SOLELY WITH RESPECT TO SECTION 1.1, SECTION 2.1(a), SECTION 2.1(b), SECTION 2.1(d), SECTION 2.2, SECTION 2.4(b), SECTION 2.7, SECT

EX-2.2 Exhibit 2.2 SEPARATION AND DISTRIBUTION AGREEMENT DATED AS OF OCTOBER 25, 2025 AMONG AVIDITY BIOSCIENCES, INC., BRYCE THERAPEUTICS, INC., AND, SOLELY WITH RESPECT TO SECTION 1.1, SECTION 2.1(a), SECTION 2.1(b), SECTION 2.1(d), SECTION 2.2, SECTION 2.4(b), SECTION 2.7, SECTION 3.2, SECTION 4.2, SECTION 4.6, SECTION 4.11, SECTION 4.12, SECTION 5.1 THROUGH SECTION 5.6, SECTION 7.1(f), SECTION

October 27, 2025 EX-99.3

Patient Community Letter

EX-99.3 Exhibit 99.3 Patient Community Letter October 26, 2025 Just over ten years ago, Avidity was founded on the bold vision to profoundly improve people’s lives by delivering a new class of RNA therapeutics. Since then, we have made incredible strides as the first-ever company to successfully demonstrate the targeted delivery of RNA to muscle. Just this year, we have achieved numerous key miles

October 27, 2025 EX-99.7

Financial Times Article

EX-99.7 Exhibit 99.7 Financial Times Article Novartis AG Novartis to buy Avidity Biosciences for $12bn Deal for specialist in rare diseases is biggest acquisition under chief executive Vas Narasimhan Talks between Novartis and Avidity were first reported by the FT in August © Bloomberg Hannah Kuchler in London and Oliver Barnes in Los Angeles Published 5 HOURS AGO | Updated 13:35 Unlock the Editor

October 27, 2025 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. ) Filed by the Registrant ¨ Filed by a Party other than the Registrant ☒ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule14a-6(

October 27, 2025 EX-99.2

All Employee Email 1

EX-99.2 Exhibit 99.2 All Employee E-mail 1 All Employee Email 1 Sent in conjunction with the issuance of the signing press release Dear Team, Just over ten years ago, Avidity Biosciences was founded on the bold vision to profoundly improve people’s lives by delivering a new class of RNA therapeutics. Since then, we have made incredible strides, breaking new ground as the first-ever company to succ

October 27, 2025 EX-99.6

LinkedIn Post

EX-99.6 Exhibit 99.6 LinkedIn Post We are pleased to share that Avidity has entered a definitive merger agreement to be acquired by Novartis, under which Novartis will acquire our programs and pipeline in neuroscience and gain access to our differentiated RNA-targeting delivery platform. The acquisition will follow the separation of Avidity’s early-stage precision cardiology programs and collabora

October 27, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

October 27, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 25, 2025 Avidity Bioscien

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 25, 2025 Avidity Biosciences, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39321   46-1336960 (State or other jurisdiction of incorporation

October 27, 2025 EX-99.1

Avidity Biosciences Enters into Agreement to be Acquired by Novartis AG Novartis to acquire Avidity for USD 72.00 per share in cash for total equity value of approximately USD 12.0 billion Avidity expects to separate its early-stage precision cardiol

EX-99.1 Exhibit 99.1 Avidity Biosciences Enters into Agreement to be Acquired by Novartis AG Novartis to acquire Avidity for USD 72.00 per share in cash for total equity value of approximately USD 12.0 billion Avidity expects to separate its early-stage precision cardiology programs into a new company (“SpinCo”) Closing expected in 1H2026 subject to completion of the separation of SpinCo from Avid

October 14, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 13, 2025 AVIDITY BIOSCIEN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 13, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organi

September 12, 2025 EX-99.1

Avidity Biosciences Announces Proposed Public Offering of Common Stock

EX-99.1 Exhibit 99.1 Avidity Biosciences Announces Proposed Public Offering of Common Stock SAN DIEGO, September 10, 2025 /PRNewswire/ – Avidity Biosciences, Inc. (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therapeutics called Antibody Oligonucleotide Conjugates (AOCs™), today announced that it intends to offer and sell, subject to market and other conditi

September 12, 2025 EX-99.2

Avidity Biosciences Announces Pricing of Upsized Public Offering of Common Stock

EX-99.2 Exhibit 99.2 Avidity Biosciences Announces Pricing of Upsized Public Offering of Common Stock SAN DIEGO, September 11, 2025 /PRNewswire/ – Avidity Biosciences, Inc. (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therapeutics called Antibody Oligonucleotide Conjugates (AOCs™), today announced the pricing of its upsized underwritten public offering of 1

September 12, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 11, 2025 AVIDITY BIOSCI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 11, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or orga

September 12, 2025 EX-1.1

15,000,000 Shares AVIDITY BIOSCIENCES, INC. Common Stock UNDERWRITING AGREEMENT

EX-1.1 Exhibit 1.1 15,000,000 Shares AVIDITY BIOSCIENCES, INC. Common Stock UNDERWRITING AGREEMENT September 11, 2025 LEERINK PARTNERS LLC J.P. MORGAN SECURITIES LLC TD SECURITIES (USA) LLC As Representatives of the several Underwriters c/o Leerink Partners LLC 53 State Street, 40th Floor Boston, MA 02109 c/o J.P. Morgan Securities LLC 383 Madison Avenue New York, NY 10179 c/o TD Securities (USA)

September 12, 2025 424B5

15,000,000 Shares Common Stock

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-279264 PROSPECTUS SUPPLEMENT (To Prospectus dated May 9, 2024) 15,000,000 Shares Common Stock We are offering 15,000,000 shares of our common stock. Our common stock is listed on the Nasdaq Global Market under the symbol “RNA.” On September 11, 2025, the last reported sales price of our common stock on the Nasdaq Global

September 12, 2025 EX-FILING FEES

Security Type

Calculation of Filing Fee Tables S-3 Avidity Biosciences, Inc. Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward I

September 11, 2025 144

144

144 0001841990 XXXXXXXX LIVE 0001599901 Avidity Biosciences, Inc. 001-39321 10578 Science Center Drive, Suite 125 San Diego CA 92121 8584017900 WILLIAM MICHAEL FLANAGAN Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 20000 928000.00 128653337 09/11/2025 NASDAQ Common 09/11/2025 Exercise of Stock Options Issuer N 20000 09/11/2

September 10, 2025 EX-10.1

Exhibit 10.1 AMENDMENT TO THE AVIDITY BIOSCIENCES, INC. 2022 EMPLOYMENT INDUCEMENT INCENTIVE AWARD PLAN THIS AMENDMENT TO THE AVIDITY BIOSCIENCES, INC. 2022 EMPLOYMENT INDUCEMENT INCENTIVE AWARD PLAN (this “Amendment”), effective as of September 9, 2

exhibit101-amendmenttoin Exhibit 10.1 AMENDMENT TO THE AVIDITY BIOSCIENCES, INC. 2022 EMPLOYMENT INDUCEMENT INCENTIVE AWARD PLAN THIS AMENDMENT TO THE AVIDITY BIOSCIENCES, INC. 2022 EMPLOYMENT INDUCEMENT INCENTIVE AWARD PLAN (this “Amendment”), effective as of September 9, 2025 is made and adopted by Avidity Biosciences, Inc., a Delaware corporation (the “Company”). Capitalized terms used but not

September 10, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 9, 2025 AVIDITY BIOSCIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 9, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

September 10, 2025 EX-99.1

1 September 10, 2025 NASDAQ: RNA | aviditybio.com Investor & Analyst Event Redefining the Treatment of Duchenne Muscular Dystrophy (DMD) Del-zota EXPLORE44-OLE Topline and Functional Data Exhibit 99.1 2 Forward-Looking Statements We caution the reade

sep10x2025xdel-zotaxweb 1 September 10, 2025 NASDAQ: RNA | aviditybio.com Investor & Analyst Event Redefining the Treatment of Duchenne Muscular Dystrophy (DMD) Del-zota EXPLORE44-OLE Topline and Functional Data Exhibit 99.1 2 Forward-Looking Statements We caution the reader that this presentation contains forward-looking statements that involve substantial risks and uncertainties. All statements

September 10, 2025 424B5

PRELIMINARY PROSPECTUS SUPPLEMENT (Subject to Completion) Dated September 10, 2025

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-279264 The information in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to these securities has been declared effective by the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell

September 5, 2025 144

144

144 0001589597 XXXXXXXX LIVE 0001599901 Avidity Biosciences, Inc. 001-39321 3020 CALLAN ROAD SAN DIEGO CA 92121 858-401-7900 WILSON TROY EDWARD Chairman Common UBS Financial Services, Inc Eleven Madison Avenue 4th floor New York NY 10010 95052 4752600.00 128653337 09/05/2025 Nasdaq Common 09/05/2025 Stock Option exercise Issuer N 14500 09/05/2025 Cash Common 04/18/2018 Long shares Issuer N 15000 0

September 5, 2025 144

144

144 0001629383 XXXXXXXX LIVE 0001599901 Avidity Biosciences, Inc. 001-39321 10578 Science Center Drive, Suite 125 San Diego CA 92121 8584017900 SARAH BOYCE Director Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 50000 2423500.00 128653337 09/05/2025 NASDAQ Common 09/05/2025 Exercise of Stock Options Issuer N 50000 09/05/2025

September 3, 2025 144

144

144 0001715283 XXXXXXXX LIVE 0001599901 Avidity Biosciences, Inc. 001-39321 10578 Science Center Drive, Suite 125 San Diego CA 92121 8584017900 ERIC MOSBROOKER Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 19688 929864.24 128653337 09/03/2025 NASDAQ Common 09/03/2025 Exercise of Stock Options Issuer N 19688 09/03/2025 Cash

August 28, 2025 144

144

144 0001629383 XXXXXXXX LIVE 0001599901 AVIDITY BIOSCIENCES INC 001-39321 10578 Science Center Drive, Suite 125 San Diego CA 92121 8584017900 SARAH BOYCE Director Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 25000 1195500.

August 7, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2025 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-39321 Avidity Biosciences, Inc. (Exact name

August 7, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 1, 2025 AVIDITY BIOSCIENCE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 1, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiza

August 7, 2025 EX-99.1

Avidity Biosciences Reports Second Quarter 2025 Financial Results and Recent Highlights Aligned with FDA on del-brax accelerated and full approval pathways for FSHD, reported positive topline data from Phase 1/2 FORTITUDE™ trial, and initiated global

Exhibit 99.1 Avidity Biosciences Reports Second Quarter 2025 Financial Results and Recent Highlights Aligned with FDA on del-brax accelerated and full approval pathways for FSHD, reported positive topline data from Phase 1/2 FORTITUDE™ trial, and initiated global confirmatory Phase 3 study Planned del-zota BLA submission at year end 2025 for DMD44 on track to be Avidity’s first BLA submission On t

July 23, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 23, 2025 AVIDITY BIOSCIENCES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 23, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizat

June 10, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 10, 2025 AVIDITY BIOSCIENCES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 10, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizat

June 9, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 9, 2025 AVIDITY BIOSCIENCES,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 9, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizati

June 9, 2025 EX-99.1

Forward-Looking Statements We caution the reader that this presentation contains forward-looking statements that involve substantial risks and uncertainties. All statements other than statements of historical fact contained in this presentation are f

EX-99.1 June 9, 2025 NASDAQ: RNA | aviditybio.com Investor & Analyst Event Series Delivering for People Living with Facioscapulohumeral Muscular Dystrophy (FSHD) Exhibit 99.1 Forward-Looking Statements We caution the reader that this presentation contains forward-looking statements that involve substantial risks and uncertainties. All statements other than statements of historical fact contained i

May 8, 2025 EX-99.1

Avidity Biosciences Reports First Quarter 2025 Financial Results and Recent Highlights On track to deliver key regulatory updates for del-brax and topline data from dose escalation cohorts in the FORTITUDETM trial in the second quarter Positive topli

Exhibit 99.1 Avidity Biosciences Reports First Quarter 2025 Financial Results and Recent Highlights On track to deliver key regulatory updates for del-brax and topline data from dose escalation cohorts in the FORTITUDETM trial in the second quarter Positive topline del-zota data further supports first BLA submission at year end 2025 – continues to highlight reproducibility and consistency across t

May 8, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2025 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-39321 Avidity Biosciences, Inc. (Exact name

May 8, 2025 EX-10.2

, by and between Turning Point Therapeutics, Inc. and the Registrant.

rna-20250331xex102firsta Exhibit 10.2 Certain identified information has been excluded from this exhibit because it is both not material and is the type that the registrant treats as private or confidential. Such omitted information has been noted in this document with a placeholder identified by the mark “[***]”. First Amendment to Sublease Agreement This First Amendment to Sublease Agreement (th

May 8, 2025 EX-10.1

on-Employee Director Compensation P

rna-20250331xex101avidit Exhibit 10.1 1 AVIDITY BIOSCIENCES, INC. NON-EMPLOYEE DIRECTOR COMPENSATION PROGRAM (As Amended and Restated Effective April 1, 2025) Non-employee members of the board of directors (the “Board”) of Avidity Biosciences, Inc. (the “Company”) shall receive cash and equity compensation as set forth in this Non-Employee Director Compensation Program (as amended to date, this “P

May 8, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 8, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizatio

April 29, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14

April 29, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 25, 2025 AVIDITY BIOSCIENCE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 25, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiza

April 29, 2025 ARS

ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2024 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number: 001-39321 AVIDITY BIOSCIENCES, INC.

April 29, 2025 EX-16.1

Letter to Securities and Exchange Commission from BDO USA, P.C., dated April 28, 2025.

exhibit161 April 28, 2025 Securities and Exchange Commission 100 F Street N.E. Washington, D.C. 20549 We have been furnished with a copy of the response to Item 4.01 of Form 8-K for the event that occurred on April 25, 2025, to be filed by Avidity Biosciences, Inc. We agree with the statements made in response to that Item insofar as they relate to our Firm. Very truly yours, /s/ BDO USA, P.C.

April 29, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

March 25, 2025 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 19, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiza

March 17, 2025 EX-99.1

1 March 17, 2025 NASDAQ: RNA | aviditybio.com Investor & Analyst Event Transforming Duchenne Muscular Dystrophy (DMD) Del-zota EXPLORE44® Phase 1/2 Topline Data 2 We caution the reader that this presentation contains forward-looking statements that i

1 March 17, 2025 NASDAQ: RNA | aviditybio.com Investor & Analyst Event Transforming Duchenne Muscular Dystrophy (DMD) Del-zota EXPLORE44® Phase 1/2 Topline Data 2 We caution the reader that this presentation contains forward-looking statements that involve substantial risks and uncertainties. All statements other than statements of historical fact contained in this presentation are forward-looking

March 17, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 17, 2025 AVIDITY BIOSCIENCE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 17, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiza

February 27, 2025 S-8

As filed with the Securities and Exchange Commission on February 27, 2025

As filed with the Securities and Exchange Commission on February 27, 2025 Registration No.

February 27, 2025 EX-99.1

Avidity Biosciences Reports Fourth Quarter 2024 Financial Results and Recent Highlights Building on success across its three clinical programs, Avidity is leading in rare neuromuscular diseases with a strong balance sheet to execute on a transformati

Exhibit 99.1 Avidity Biosciences Reports Fourth Quarter 2024 Financial Results and Recent Highlights Building on success across its three clinical programs, Avidity is leading in rare neuromuscular diseases with a strong balance sheet to execute on a transformational 2025 Major milestones anticipated for each rare neuromuscular program in 2025, including preparing for Avidity’s first BLA submissio

February 27, 2025 EX-10.13

Amended and Restated Employment Agreement, dated

Exhibit 10.13 US-DOCS\153613346.2 August 29, 2024 VIA EMAIL Kathleen Gallagher c/o Avidity Biosciences, Inc. 10578 Science Center Drive, Suite 125 San Diego, CA 92121 Re: Amended and Restated Employment Agreement Dear Kath: Avidity Biosciences, Inc. (the “Company”) and you entered into that certain Employment Agreement, dated as of April 22, 2021 (the “Prior Agreement”). The Company and you desire

February 27, 2025 EX-10.15

Offer of Employment and

Exhibit 10.15 US-DOCS\156140015.2 December 12, 2024 VIA EMAIL Charles Calderaro III [email protected] Re: Offer of Employment and Employment Agreement Dear Chuck: Avidity Biosciences, Inc. (the “Company”) is pleased to offer you employment as the Company’s Chief Technology Officer on the terms and conditions set forth in this letter agreement (the “Agreement”). 1. Commencement of Emplo

February 27, 2025 EX-19.1

nsider Trading Compliance Policy and Procedures

Exhibit 19.1 1 Avidity Biosciences, Inc. Insider Trading Compliance Policy and Procedures (amended and restated as of February 19, 2025) Federal and state laws prohibit trading in the securities of a company while in possession of material nonpublic information and in breach of a duty of trust or confidence. These laws also prohibit anyone who is aware of material nonpublic information from provid

February 27, 2025 EX-10.20

ublease Agreement, dated April 29, 2024, by and between Turning Point Therapeutics, Inc. and

Exhibit 10.20 Certain identified information has been excluded from this exhibit because it is both not material and is the type that the registrant treats as private or confidential. Such omitted information has been noted in this document with a placeholder identified by the mark “[***]”. SUBLEASE AGREEMENT This Sublease Agreement (this “Sublease”) is made and entered as of April 29, 2024, by an

February 27, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2024 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number: 001-39321 AVIDITY BIOSCIENCES, INC.

February 27, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 27, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

February 27, 2025 EX-10.12

Amended and Restated Employment Agreement, dated

Exhibit 10.12 US-DOCS\152924696.1 August 26, 2024 VIA EMAIL Steven Hughes, M.D. c/o Avidity Biosciences, Inc. 10578 Science Center Drive, Suite 125 San Diego, CA 92121 Re: Amended and Restated Employment Agreement Dear Steve: Avidity Biosciences, Inc. (the “Company”) and you entered into that certain Employment Agreement, dated as of December 22, 2021 (the “Prior Agreement”). The Company and you d

February 27, 2025 EX-10.14

Amended and Restated Employment Agreement, dated

Exhibit 10.14 US-DOCS\152924874.1 August 26, 2024 VIA EMAIL Eric Mosbrooker c/o Avidity Biosciences, Inc. 10578 Science Center Drive, Suite 125 San Diego, CA 92121 Re: Amended and Restated Employment Agreement Dear Eric: Avidity Biosciences, Inc. (the “Company”) and you entered into that Employment Agreement, dated as of January 1, 2024 (the “Prior Agreement”). The Company and you desire to amend

February 27, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 CALCULATION OF FILING FEE TABLE Form S-8 (Form Type) Avidity Biosciences, Inc.

January 8, 2025 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 8, 2025 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiz

November 14, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / RA CAPITAL MANAGEMENT, L.P. - SC 13G/A Passive Investment

SC 13G/A 1 tm2427451d10sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Avidity Biosciences, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 05370A108 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Stat

November 14, 2024 EX-99.1

Joint Filing Agreement

EX-99.1 2 tm2427451d10ex1.htm EXHIBIT 1 EXHIBIT 1 AGREEMENT This Joint Filing Agreement, dated as of November 14, 2024 is by and among RA Capital Management, L.P., Peter Kolchinsky, Rajeev Shah, and RA Capital Healthcare Fund, L.P. (the foregoing are collectively referred to herein as the “Filers”). Each of the Filers may be required to file with the United States Securities and Exchange Commissio

November 14, 2024 SC 13G

RNA / Avidity Biosciences, Inc. / Avoro Capital Advisors LLC - AVIDITY BIOSCIENCES, INC. Passive Investment

SC 13G 1 p24-3108sc13g.htm AVIDITY BIOSCIENCES, INC. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Avidity Biosciences, Inc. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 05370A108 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of This Statement) Check the

November 14, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / PRICE T ROWE ASSOCIATES INC /MD/ Passive Investment

SC 13G/A 1 rna13gasep24.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6) AVIDITY BIOSCIENCES INC (Name of Issuer) COMMON STOCK (Title of Class of Securities) 05370A108 (CUSIP NUMBER) September 30, 2024 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule

November 14, 2024 EX-1

JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)

EX-1 2 p24-3108exhibit1.htm JOINT FILING AGREEMENT PURSUANT TO RULE 13D-1(K) EXHIBIT 1 JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k) The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the ne

November 13, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / Cowen Financial Products LLC - COWEN FINANCIAL PRODUCTS LLC Passive Investment

SC 13G/A 1 rnaa3111224.htm COWEN FINANCIAL PRODUCTS LLC UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* Avidity Biosciences, Inc (Name of Issuer) Common Stock (Title of Class of Securities) 05370A108 (CUSIP Number) September 30, 2024 (Date of Event which Requires Filing of this Statement) Check the ap

November 13, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / BRISTOL MYERS SQUIBB CO - SC 13G/A Passive Investment

SC 13G/A 1 ef20038544sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Avidity Biosciences, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 05370A108 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statemen

November 12, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 12, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

November 12, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / VANGUARD GROUP INC Passive Investment

SC 13G/A 1 UnitedStates13GAvidityBio.txt 240.13d-102 Schedule 13G - Information to be included in statements filed pursuant to 240.13d-1(b), (c), and (d) and amendments thereto filed pursuant to 240.13d-2. Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* (Name of Issuer) Avidity Biosciences Inc (Title of Class of S

November 12, 2024 EX-99.1

1 Investor & Analyst Event Series – Volume 11 Precision Cardiology: Transforming Genetic Cardiomyopathy Treatment & First Look at Next-Generation Innovations November 12, 2024 NASDAQ: RNA | aviditybio.com 2 We caution the reader that this presentatio

1 Investor & Analyst Event Series – Volume 11 Precision Cardiology: Transforming Genetic Cardiomyopathy Treatment & First Look at Next-Generation Innovations November 12, 2024 NASDAQ: RNA | aviditybio.

November 8, 2024 SC 13G

RNA / Avidity Biosciences, Inc. / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

SC 13G 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Avidity Biosciences, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05370A108 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box

November 8, 2024 EX-99

JOINT FILING AGREEMENT

EX-99 2 Rule13DJointFilingAgreement.htm JOINT FILING AGREEMENT JOINT FILING AGREEMENT The undersigned hereby agree that this Schedule 13G (the “Schedule 13G”) with respect to the common stock of Avidity Biosciences, Inc. is, and any additional amendment thereto signed by each of the undersigned shall be, filed on behalf of each undersigned pursuant to and in accordance with the provisions of 13d-1

November 7, 2024 EX-10.2

Amended and Restated Employment Agreement, dated August 26, 2024, by and between

rna-20240930xex102amende Exhibit 10.2 US-DOCS\150944263.7 August 26, 2024 Sarah Boyce c/o Avidity Biosciences, Inc. 10578 Science Center Drive, Suite 125 San Diego, CA 92121 Re: Amended and Restated Employment Agreement Dear Sarah: Avidity Biosciences, Inc. (the “Company”) and you entered into that certain Amended and Restated Employment Agreement, dated as of May 15, 2020 (the “Prior Agreement”).

November 7, 2024 EX-10.3

Amended and Restated Employment Agreement, dated August 26, 2024, by and between

rna-20240930xex103amende Exhibit 10.3 US-DOCS\152925120.1 August 26, 2024 VIA EMAIL Michael F. MacLean c/o Avidity Biosciences, Inc. 10578 Science Center Drive, Suite 125 San Diego, CA 92121 Re: Amended and Restated Employment Agreement Dear Mike: Avidity Biosciences, Inc. (the “Company”) and you entered into that certain Employment Agreement, dated as of May 14, 2020 (the “Prior Agreement”). The

November 7, 2024 EX-99.1

Avidity Biosciences Reports Third Quarter 2024 Financial Results and Recent Highlights Enrollment in global Phase 3 HARBORTM study for del-desiran in DM1 is on track Avidity initiated biomarker cohort for del-brax FORTITUDETM study for FSHD; pursuing

Exhibit 99.1 Avidity Biosciences Reports Third Quarter 2024 Financial Results and Recent Highlights Enrollment in global Phase 3 HARBORTM study for del-desiran in DM1 is on track Avidity initiated biomarker cohort for del-brax FORTITUDETM study for FSHD; pursuing a potential accelerated approval path for del-brax Reported positive del-zota data from Phase 1/2 EXPLORE44TM trial for DMD44 Avidity to

November 7, 2024 EX-10.5

Amended and Restated Employment Agreement, dated August 26, 2024, by and between

rna-20240930xex105amende Exhibit 10.5 US-DOCS\152924232.1 August 26, 2024 VIA EMAIL Teresa McCarthy c/o Avidity Biosciences, Inc. 10578 Science Center Drive, Suite 125 San Diego, CA 92121 Re: Amended and Restated Employment Agreement Dear Teresa: Avidity Biosciences, Inc. (the “Company”) and you entered into that certain Employment Agreement, dated as of August 14, 2020 (the “Prior Agreement”). Th

November 7, 2024 EX-10.4

Amended and Restated Employment Agreement, dated August 26, 2024, by and between

rna-20240930xex104amende Exhibit 10.4 US-DOCS\152924018.1 August 26, 2024 VIA EMAIL W. Michael Flanagan, Ph.D. c/o Avidity Biosciences, Inc. 10578 Science Center Drive, Suite 125 San Diego, CA 92121 Re: Amended and Restated Employment Agreement Dear Mike: Avidity Biosciences, Inc. (the “Company”) and you entered into that certain Employment Agreement, dated as of December 8, 2020 (the “Prior Agree

November 7, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 7, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organi

November 7, 2024 EX-10.6

Amended and Restated Employment Agreement, dated August 26, 2024, by and between

rna-20240930xex106amende Exhibit 10.6 US-DOCS\152924433.1 August 26, 2024 VIA EMAIL John B. Moriarty, Jr. c/o Avidity Biosciences, Inc. 10578 Science Center Drive, Suite 125 San Diego, CA 92121 Re: Amended and Restated Employment Agreement Dear John: Avidity Biosciences, Inc. (the “Company”) and you entered into that certain Employment Agreement, dated as of July 31, 2024 (the “Prior Agreement”).

November 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2024 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-39321 Avidity Biosciences, Inc. (Exact

November 4, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / VANGUARD GROUP INC Passive Investment

SC 13G/A 1 UnitedStates13GAvidityBio.txt 240.13d-102 Schedule 13G - Information to be included in statements filed pursuant to 240.13d-1(b), (c), and (d) and amendments thereto filed pursuant to 240.13d-2. Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* (Name of Issuer) Avidity Biosciences Inc (Title of Class of S

October 30, 2024 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 30, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organi

October 3, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 3, 2024 AVIDITY BIOSCIENC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 3, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiz

August 23, 2024 SC 13D/A

RNA / Avidity Biosciences, Inc. / RTW INVESTMENTS, LP - AVIDITY BIOSCIENCES, INC. Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 4) Avidity Biosciences, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 05370A108 (CUSIP Number

August 15, 2024 424B5

7,320,000 Shares Common Stock

Filed Pursuant to Rule 424(b)(5) Registration No. 333-279264 PROSPECTUS SUPPLEMENT (To Prospectus dated May 9, 2024) 7,320,000 Shares Common Stock We are offering 7,320,000 shares of our common stock. Our common stock is listed on the Nasdaq Global Market under the symbol “RNA.” On August 14, 2024, the last reported sales price of our common stock on the Nasdaq Global Market was $42.85 per share o

August 15, 2024 EX-99.2

Avidity Biosciences Announces Pricing of Upsized Public Offering of Common Stock SAN DIEGO, August 14, 2024 /PRNewswire/ – Avidity Biosciences, Inc. (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therapeutics ca

Avidity Biosciences Announces Pricing of Upsized Public Offering of Common Stock SAN DIEGO, August 14, 2024 /PRNewswire/ – Avidity Biosciences, Inc.

August 15, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 14, 2024 AVIDITY BIOSCIENC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 14, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiz

August 15, 2024 EX-FILING FEES

Calculation of Filing Fee Table Form 424(b)(5) (Form Type) Avidity Biosciences, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

Exhibit 107 Calculation of Filing Fee Table Form 424(b)(5) (Form Type) Avidity Biosciences, Inc.

August 15, 2024 EX-99.1

Avidity Biosciences Announces Proposed Public Offering of Common Stock SAN DIEGO, August 13, 2024 /PRNewswire/ – Avidity Biosciences, Inc. (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therapeutics called Antib

Avidity Biosciences Announces Proposed Public Offering of Common Stock SAN DIEGO, August 13, 2024 /PRNewswire/ – Avidity Biosciences, Inc.

August 15, 2024 EX-1.1

Underwriting Agreement, dated August 14, 2024, by and among Avidity Biosciences, Inc. and Leerink Partners LLC and TD Securities (USA) LLC, as representatives of the several underwriters named therein

Exhibit 1.1 7,320,000 Shares AVIDITY BIOSCIENCES, INC. Common Stock UNDERWRITING AGREEMENT August 14, 2024 LEERINK PARTNERS LLC TD SECURITIES (USA) LLC As Representatives of the several Underwriters c/o Leerink Partners LLC 53 State Street, 40th Floor Boston, MA 02109 c/o TD Securities (USA) LLC 1 Vanderbilt Avenue New York, New York 10017 Dear Sirs and Madams: 1. INTRODUCTORY. Avidity Biosciences

August 13, 2024 424B5

PRELIMINARY PROSPECTUS SUPPLEMENT (Subject to Completion) Dated August 13, 2024

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-279264 The information in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to these securities has been declared effective by the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these

August 9, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 9, 2024 AVIDITY BIOSCIENCE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 9, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiza

August 9, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2024 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-39321 Avidity Biosciences, Inc. (Exact name

August 9, 2024 EX-10.2

Sales Agreement, dated August 9, 2024, by and between Avidity Biosciences, Inc. and TD Securities (USA) LLC

Exhibit 10.2 AVIDITY BIOSCIENCES, INC. $400,000,000 COMMON STOCK SALES AGREEMENT August 9, 2024 TD Securities (USA) LLC 1 Vanderbilt Avenue New York, New York 10017 Ladies and Gentlemen: Avidity Biosciences, Inc., a Delaware corporation (the “Company”), confirms its agreement (this “Agreement”) with TD Securities (USA) LLC (“TD Cowen”), as follows: 1. Issuance and Sale of Placement Shares. The Com

August 9, 2024 S-8

As filed with the Securities and Exchange Commission on August 9, 2024

S-8 1 d895147ds8.htm S-8 As filed with the Securities and Exchange Commission on August 9, 2024 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 46-1336960 (State or Other Jurisdiction of Incorporatio

August 9, 2024 EX-99.1

1 August 9, 2024 NASDAQ: RNA | aviditybio.com Investor & Analyst Event Series – Volume 10 Transforming Duchenne Muscular Dystrophy (DMD) AOC 1044 EXPLORE44TM Phase 1/2 Initial Data 2 We caution the reader that this presentation contains forward-looki

1 August 9, 2024 NASDAQ: RNA | aviditybio.com Investor & Analyst Event Series – Volume 10 Transforming Duchenne Muscular Dystrophy (DMD) AOC 1044 EXPLORE44TM Phase 1/2 Initial Data 2 We caution the reader that this presentation contains forward-looking statements that involve substantial risks and uncertainties. All statements other than statements of historical fact contained in this presentation

August 9, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 9, 2024 AVIDITY BIOSCIENCE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 9, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiza

August 9, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 CALCULATION OF FILING FEE TABLE Form S-8 (Form Type) Avidity Biosciences, Inc.

August 9, 2024 EX-99.1

Avidity Biosciences Reports Second Quarter 2024 Financial Results and Recent Highlights Avidity reports positive del-zota (AOC 1044) data; demonstrated 25% increase in dystrophin production and reduction of creatine kinase levels to near normal in pe

Exhibit 99.1 Avidity Biosciences Reports Second Quarter 2024 Financial Results and Recent Highlights Avidity reports positive del-zota (AOC 1044) data; demonstrated 25% increase in dystrophin production and reduction of creatine kinase levels to near normal in people living with DMD44 in Phase 1/2 EXPLORE44™ trial Initiated global Phase 3 HARBOR™ trial and began administration of del-desiran in pe

August 9, 2024 424B5

$400,000,000 Common Stock

424B5 1 d851103d424b5.htm 424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-279264 PROSPECTUS SUPPLEMENT (To Prospectus dated May 9, 2024) $400,000,000 Common Stock We have entered into a sales agreement, or the Sales Agreement, with TD Securities (USA) LLC, or TD Cowen, relating to shares of our common stock, par value $0.0001 per share, offered by this prospectus supp

August 9, 2024 EX-FILING FEES

Calculation of Filing Fee Table Form S-3 (Form Type) Avidity Biosciences, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

Exhibit 107 Calculation of Filing Fee Table Form S-3 (Form Type) Avidity Biosciences, Inc.

June 14, 2024 EX-99.1

Exhibit 99.1 Avidity Biosciences, Inc. Announces Proposed Public Offering of Common Stock SAN DIEGO, June 12, 2024 /PRNewswire/ – Avidity Biosciences, Inc. (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therapeu

Exhibit 99.1 Avidity Biosciences, Inc. Announces Proposed Public Offering of Common Stock SAN DIEGO, June 12, 2024 /PRNewswire/ – Avidity Biosciences, Inc. (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therapeutics called Antibody Oligonucleotide Conjugates (AOCs™), today announced that it intends to offer and sell, subject to market and other conditions, $3

June 14, 2024 EX-99.2

Exhibit 99.2 Avidity Biosciences, Inc. Announces Pricing of Public Offering of Common Stock SAN DIEGO, June 13, 2024 /PRNewswire/ – Avidity Biosciences, Inc. (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therap

Exhibit 99.2 Avidity Biosciences, Inc. Announces Pricing of Public Offering of Common Stock SAN DIEGO, June 13, 2024 /PRNewswire/ – Avidity Biosciences, Inc. (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therapeutics called Antibody Oligonucleotide Conjugates (AOCs™), today announced the pricing of an underwritten public offering of 10,550,000 shares of its

June 14, 2024 EX-1.1

Underwriting Agreement, dated June 13, 2024, by and among Avidity Biosciences, Inc. and TD Securities (USA) LLC and Leerink Partners LLC, as representatives of the several underwriters named therein

Exhibit 1.1 10,550,000 Shares AVIDITY BIOSCIENCES, INC. Common Stock UNDERWRITING AGREEMENT June 13, 2024 TD SECURITIES (USA) LLC LEERINK PARTNERS LLC As Representatives of the several Underwriters c/o TD Securities (USA) LLC 1 Vanderbilt Avenue New York, New York 10017 c/o Leerink Partners LLC 53 State Street, 40th Floor Boston, MA 02109 Dear Sirs and Madams: 1. INTRODUCTORY. Avidity Biosciences,

June 14, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 13, 2024 AVIDITY BIOSCIENCES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 13, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizat

June 14, 2024 EX-FILING FEES

Calculation of Filing Fee Tables (Form Type) Avidity Biosciences, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registe

Exhibit 107 Calculation of Filing Fee Tables 424(b)(5) (Form Type) Avidity Biosciences, Inc.

June 14, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 13, 2024 AVIDITY BIOSCIENCES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 13, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizat

June 14, 2024 424B5

10,550,000 Shares Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-279264 PROSPECTUS SUPPLEMENT (To Prospectus dated May 9, 2024) 10,550,000 Shares Common Stock We are offering 10,550,000 Shares of our common stock. Our common stock is listed on the Nasdaq Global Market under the symbol “RNA.” On June 13, 2024, the last reported sales price of our common stock on the Nasdaq Global Market was

June 12, 2024 424B5

$300,000,000 Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-279264 The information in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to these securities has been declared effective by the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these

June 12, 2024 EX-10.1

Amendment to Avidity Biosciences, Inc. 2022 Employment Inducement Incentive

Exhibit 10.1 AMENDMENT TO THE AVIDITY BIOSCIENCES, INC. 2022 EMPLOYMENT INDUCEMENT INCENTIVE AWARD PLAN THIS AMENDMENT TO THE AVIDITY BIOSCIENCES, INC. 2022 EMPLOYMENT INDUCEMENT INCENTIVE AWARD PLAN (this “Amendment”), effective as of June 10, 2024, is made and adopted by Avidity Biosciences, Inc., a Delaware corporation (the “Company”). Capitalized terms used but not otherwise defined herein sha

June 12, 2024 EX-99.1

1 June 12, 2024 NASDAQ: RNA | aviditybio.com Investor & Analyst Event Series – Volume 9 Transforming Facioscapulohumeral Muscular Dystrophy (FSHD) AOC 1020 FORTITUDETM Phase 1/2 Initial Data 2 Forward-Looking Statements We caution the reader that thi

1 June 12, 2024 NASDAQ: RNA | aviditybio.com Investor & Analyst Event Series – Volume 9 Transforming Facioscapulohumeral Muscular Dystrophy (FSHD) AOC 1020 FORTITUDETM Phase 1/2 Initial Data 2 Forward-Looking Statements We caution the reader that this presentation contains forward-looking statements that involve substantial risks and uncertainties. All statements other than statements of historica

June 12, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 10, 2024 AVIDITY BIOSCIENCES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 10, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizat

May 15, 2024 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 14, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizati

May 15, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

May 9, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table Form S-3 (Form Type) Avidity Biosciences, Inc.

May 9, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 9, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizatio

May 9, 2024 S-3ASR

As filed with the Securities and Exchange Commission on May 9, 2024

As filed with the Securities and Exchange Commission on May 9, 2024 Registration No.

May 9, 2024 EX-10.1

mended and Restated Non-Employee Director Com

Exhibit 10.1 AVIDITY BIOSCIENCES, INC. NON-EMPLOYEE DIRECTOR COMPENSATION PROGRAM (As Amended and Restated Effective April 19, 2024) Non-employee members of the board of directors (the “Board”) of Avidity Biosciences, Inc. (the “Company”) shall receive cash and equity compensation as set forth in this Non-Employee Director Compensation Program (as amended to date, this “Program”). This Program has

May 9, 2024 EX-99.1

Avidity Biosciences Reports First Quarter 2024 Financial Results and Recent Highlights Initiation of global Phase 3 HARBOR™ trial for del-desiran (AOC 1001) in DM1 on track for this quarter Avidity to report FSHD data from FORTITUDE™ trial this quart

Exhibit 99.1 Avidity Biosciences Reports First Quarter 2024 Financial Results and Recent Highlights Initiation of global Phase 3 HARBOR™ trial for del-desiran (AOC 1001) in DM1 on track for this quarter Avidity to report FSHD data from FORTITUDE™ trial this quarter and DMD data from EXPLORE44™ trial in 2H24 Presented positive long-term del-desiran data from MARINA-OLE™ showing reversal of disease

May 9, 2024 EX-4.4

Form of Indenture

Exhibit 4.4 AVIDITY BIOSCIENCES, INC. INDENTURE Dated as of , 20 [ ] Trustee TABLE OF CONTENTS Page ARTICLE I. DEFINITIONS AND INCORPORATION BY REFERENCE 1 Section 1.1. Definitions. 1 Section 1.2. Other Definitions. 5 Section 1.3. Incorporation by Reference of Trust Indenture Act. 5 Section 1.4. Rules of Construction. 6 ARTICLE II. THE SECURITIES 6 Section 2.1. Issuable in Series. 6 Section 2.2. E

May 9, 2024 10-Q

Form 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2024 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-39321 Avidity Biosciences, Inc. (Exact name

May 6, 2024 SC 13G

RNA / Avidity Biosciences, Inc. / RA CAPITAL MANAGEMENT, L.P. - SC 13G Passive Investment

SC 13G 1 tm2413656d1sc13g.htm SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Avidity Biosciences, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 05370A108 (CUSIP Number) April 26, 2024 (Date of Event Which Requires Filing of this Statement) Check

April 26, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

April 26, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14

April 26, 2024 ARS

ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2023 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number: 001-39321 AVIDITY BIOSCIENCES, INC.

April 2, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table Form S-3 (Form Type) Avidity Biosciences, Inc.

April 2, 2024 S-3ASR

As filed with the Securities and Exchange Commission on April 2, 2024

As filed with the Securities and Exchange Commission on April 2, 2024 Registration No.

March 11, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / PRICE T ROWE ASSOCIATES INC /MD/ Passive Investment

SC 13G/A 1 rna13gafeb24.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5) AVIDITY BIOSCIENCES INC (Name of Issuer) COMMON STOCK (Title of Class of Securities) 05370A108 (CUSIP NUMBER) February 29, 2024 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule

March 4, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 4, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizat

March 4, 2024 EX-99.1

Investor & Analyst Event Series – Volume 8 TRANSFORMING MYOTONIC DYSTROPHY Global Phase 3 HARBOR Trial & Long-term MARINA-OLE Data March 4, 2024 NASDAQ: RNA | aviditybio.com 2 Forward-Looking Statements We caution the reader that this presentation co

Investor & Analyst Event Series – Volume 8 TRANSFORMING MYOTONIC DYSTROPHY Global Phase 3 HARBOR Trial & Long-term MARINA-OLE Data March 4, 2024 NASDAQ: RNA | aviditybio.

March 1, 2024 SC 13D/A

RNA / Avidity Biosciences, Inc. / RTW INVESTMENTS, LP - AVIDITY BIOSCIENCES, INC. Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 3) Avidity Biosciences, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 05370A108 (CUSIP Number

February 29, 2024 EX-10.1

ary 28, 2024, by and between Avidity Biosciences, Inc. and each of the purchasers party thereto

Exhibit 10.1 AVIDITY BIOSCIENCES, INC. SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (the “Agreement”) is made as of February 28, 2024 (the “Effective Date”), by and between Avidity Biosciences, Inc., a Delaware corporation (the “Company”), and each of the purchasers whose names are set forth on Schedule A hereto (each, a “Purchaser” and, collectively, the “Purchasers”). Whereas

February 29, 2024 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 28, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

February 29, 2024 EX-99.1

Avidity Biosciences Announces Oversubscribed $400 Million Private Placement Funding from new and existing investors, including Adage Capital Partners LP, Boxer Capital, Casdin Capital, LLC, Farallon, Janus Henderson Investors, RA Capital Management,

Exhibit 99.1 Avidity Biosciences Announces Oversubscribed $400 Million Private Placement Funding from new and existing investors, including Adage Capital Partners LP, Boxer Capital, Casdin Capital, LLC, Farallon, Janus Henderson Investors, RA Capital Management, RTW Investments, Wellington Management, as well as multiple large investment management firms Pro forma cash, cash equivalents and invest

February 29, 2024 EX-4.1

Form of Pre-Funded Warrant

Exhibit 4.1 THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR ANY OTHER APPLICABLE SECURITIES LAWS AND HAVE BEEN ISSUED IN RELIANCE UPON AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND SUCH OTHER SECURITIES LAWS. NEITHER THIS SECURITY NOR ANY INTEREST OR PARTICIPATION HEREIN MAY BE

February 29, 2024 S-8

As filed with the Securities and Exchange Commission on February 29, 2024

As filed with the Securities and Exchange Commission on February 29, 2024 Registration No.

February 29, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Avidity Biosciences, Inc.

February 28, 2024 EX-21.1

Subsidiaries of the Registrant.

Exhibit 21.1 Subsidiaries Entity Name State or Other Jurisdiction of Organization Avidity Biosciences Ireland Limited Republic of Ireland

February 28, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2023 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number: 001-39321 AVIDITY BIOSCIENCES, INC.

February 28, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 28, 2024 AVIDITY BIOSCIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 28, 2024 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

February 28, 2024 EX-10.14

ecurities Purchase Agreement, dated November 27, 2023, by and between Bristol

Exhibit 10.14 Certain identified information has been excluded from this exhibit because it is both not material and is the type that the registrant treats as private or confidential. Such omitted information has been noted in this document with a placeholder identified by the mark “[***]”. SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of November

February 28, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table Form S-3 (Form Type) Avidity Biosciences, Inc.

February 28, 2024 EX-99.1

Avidity Biosciences Reports Fourth Quarter and Year-End 2023 Financial Results and Recent Highlights Avidity is on-track to initiate global Phase 3 HARBOR™ trial of AOC 1001 for DM1 in mid-2024 Company to share first-look at long-term efficacy and sa

Exhibit 99.1 Avidity Biosciences Reports Fourth Quarter and Year-End 2023 Financial Results and Recent Highlights Avidity is on-track to initiate global Phase 3 HARBOR™ trial of AOC 1001 for DM1 in mid-2024 Company to share first-look at long-term efficacy and safety data from MARINA-OLE™ trial in people living with DM1 at MDA Clinical & Scientific Conference and via webcast on March 4, 2024 Avidi

February 28, 2024 EX-10.2

Avidity Biosciences, Inc. 2020 Incentive Award Plan, including forms of grant notices and agreements thereunder

Exhibit 10.2 AVIDITY BIOSCIENCES, INC. 2020 INCENTIVE AWARD PLAN ARTICLE I. PURPOSE The Plan’s purpose is to enhance the Company’s ability to attract, retain and motivate persons who make (or are expected to make) important contributions to the Company by providing these individuals with equity ownership opportunities. Capitalized terms used in the Plan are defined in Article XI. ARTICLE II. ELIGI

February 28, 2024 S-3ASR

As filed with the Securities and Exchange Commission on February 28, 2024

As filed with the Securities and Exchange Commission on February 28, 2024 Registration No.

February 28, 2024 EX-97.1

Avidity Biosciences, Inc. Policy for Recovery of Erroneously Awarded Compensation.

Exhibit 97.1 AVIDITY BIOSCIENCES POLICY FOR RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION Avidity Biosciences, Inc. (the “Company”) has adopted this Policy for Recovery of Erroneously Awarded Compensation (this “Policy”), effective as of October 2, 2023 (the “Effective Date”). Capitalized terms used in this Policy but not otherwise defined herein are defined in Section 11. 1.Persons Subject to Poli

February 28, 2024 EX-10.13

esearch Collaboration and License Agreement, dated November 27, 2023, by and between Bristol

Exhibit 10.13 Certain identified information has been excluded from this exhibit because it is both not material and is the type that the registrant treats as private or confidential. Such omitted information has been noted in this document with a placeholder identified by the mark “[***]”. RESEARCH COLLABORATION AND LICENSE AGREEMENT between AVIDITY BIOSCIENCES, INC. and BRISTOL MYERS SQUIBB COMP

February 14, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / PRICE T ROWE ASSOCIATES INC /MD/ Passive Investment

SC 13G/A 1 rna13gadec23.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4) AVIDITY BIOSCIENCES INC (Name of Issuer) COMMON STOCK (Title of Class of Securities) 05370A108 (CUSIP NUMBER) December 31, 2023 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule

February 14, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / RA CAPITAL MANAGEMENT, L.P. - SC 13G/A Passive Investment

SC 13G/A 1 tm246065d5sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* AVIDITY BIOSCIENCES, INC. (Name of Issuer) Common Stock, $0.0001 par value per share (Title of Class of Securities) 05370A108 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Stateme

February 14, 2024 EX-99.1

Exhibit 1: Joint filing agreement

EX-99.1 2 tm246065d5ex1.htm EXHIBIT 1 EXHIBIT 1 AGREEMENT This Joint Filing Agreement, dated as of February 14, 2024, is by and among RA Capital Management, L.P., Peter Kolchinsky, Rajeev Shah, and RA Capital Healthcare Fund, L.P. (the foregoing are collectively referred to herein as the “Filers”). Each of the Filers may be required to file with the United States Securities and Exchange Commission

February 13, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1)* Name of issuer: Avidity Biosciences Inc Title of Class of Securities: Common Stock CUSIP Number: 05370A108 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is file

February 9, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / FMR LLC Passive Investment

SCHEDULE 13G Amendment No.6 AVIDITY BIOSCIENCES INC COMMON STOCK Cusip #05370A108 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [x] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) Cusip #05370A108 Item 1: Reporting Person - FMR LLC Item 2: (a) [ ] (b) [ ] Item 4: Delaware Item 5: 10,400,902 Item 6: 0 Item 7: 10,404,096 Item 8: 0 Item 9: 10,404,096 Item

February 2, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / Cowen Financial Products LLC - COWEN FINANCIAL PRODUCTS LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Avidity Biosciences, Inc (Name of Issuer) Common Stock (Title of Class of Securities) 05370A108 (CUSIP Number) December 29, 2023 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which thi

January 25, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / BlackRock Inc. Passive Investment

SC 13G/A 1 us05370a1088012524.txt us05370a1088012524.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 3) AVIDITY BIOSCIENCES INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 05370A108 - (CUSIP Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropriat

January 24, 2024 SC 13D/A

RNA / Avidity Biosciences, Inc. / RTW INVESTMENTS, LP - AVIDITY BIOSCIENCES, INC. Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 2) Avidity Biosciences, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 05370A108 (CUSIP Number

January 23, 2024 SC 13G/A

RNA / Avidity Biosciences, Inc. / STATE STREET CORP Passive Investment

SC 13G/A 1 AvidityBioInc.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 EXIT FILING AVIDITY BIOSCIENCES INC (NAME OF ISSUER) COMMON STOCK (TITLE OF CLASS OF SECURITIES) 05370A108 (CUSIP NUMBER) 12/31/2023 (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT) CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUAN

January 5, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 31, 2023 AVIDITY BIOSCIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 31, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

December 14, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 13, 2023 AVIDITY BIOSCIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 13, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

December 13, 2023 EX-3.2

Amended and Restated Bylaws (marked

cpredline-avidityxboard AMENDED AND RESTATED BYLAWS OF AVIDITY BIOSCIENCES, INC. (a Delaware corporation) As Amended and Restated December 12, 2023 Exhibit 3.2 -i- TABLE OF CONTENTS Page ARTICLE I - CORPORATE OFFICES ............................................................................................... 1 1.1 REGISTERED OFFICE ...............................................................

December 13, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 12, 2023 AVIDITY BIOSCIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 12, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

December 13, 2023 EX-3.1

Amended and Restated Bylaws

avidity-arbylawsasofdece Exhibit 3.1 AMENDED AND RESTATED BYLAWS OF AVIDITY BIOSCIENCES, INC. (a Delaware corporation) As Amended and Restated December 12, 2023 -i- TABLE OF CONTENTS Page ARTICLE I - CORPORATE OFFICES ............................................................................................... 1 1.1 REGISTERED OFFICE ..............................................................

December 4, 2023 SC 13G

RNA / Avidity Biosciences Inc / BRISTOL MYERS SQUIBB CO - SC 13G Passive Investment

SC 13G 1 ef20016011sc13g.htm SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.)* Avidity Biosciences, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 05370A108 (CUSIP Number) November 27, 2023 (Date of Event Which Requires Filing of This Statement) Check

November 28, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 27, 2023 AVIDITY BIOSCIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 27, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

November 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2023 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-39321 Avidity Biosciences, Inc. (Exact

November 8, 2023 EX-99.1

Avidity Biosciences Reports Third Quarter 2023 Financial Results and Recent Highlights Avidity reported new positive AOC 1001 data at World Muscle Society (WMS) Congress in October demonstrating consistent improvement in multiple additional functiona

Exhibit 99.1 Avidity Biosciences Reports Third Quarter 2023 Financial Results and Recent Highlights Avidity reported new positive AOC 1001 data at World Muscle Society (WMS) Congress in October demonstrating consistent improvement in multiple additional functional endpoints and favorable long-term safety and tolerability in people living with myotonic dystrophy type 1 (DM1) AOC 1044 receives Orpha

November 8, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 8, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organi

October 10, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 7, 2023 AVIDITY BIOSCIENC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 7, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiz

August 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2023 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-39321 Avidity Biosciences, Inc. (Exact name

August 8, 2023 EX-99.1

Avidity Biosciences Reports Second Quarter 2023 Financial Results and Recent Highlights Advancing three clinical development programs – DM1, DMD, FSHD - with data anticipated from each program over the next 12 months

Exhibit 99.1 Avidity Biosciences Reports Second Quarter 2023 Financial Results and Recent Highlights Advancing three clinical development programs – DM1, DMD, FSHD - with data anticipated from each program over the next 12 months SAN DIEGO, Aug. 8, 2023 /PRNewswire/- Avidity Biosciences, Inc. (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therapeutics called

August 8, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 8, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiza

July 10, 2023 SC 13G/A

RNA / Avidity Biosciences Inc / FMR LLC Passive Investment

SCHEDULE 13G Amendment No.5 AVIDITY BIOSCIENCES INC COMMON STOCK Cusip #05370A108 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [x] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) Cusip #05370A108 Item 1: Reporting Person - FMR LLC Item 2: (a) [ ] (b) [ ] Item 4: Delaware Item 5: 10,620,249 Item 6: 0 Item 7: 10,622,863 Item 8: 0 Item 9: 10,622,863 Item

July 10, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 10, 2023 AVIDITY BIOSCIENCES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 10, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizat

June 16, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 15, 2023 AVIDITY BIOSCIENCES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 15, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizat

May 17, 2023 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 17, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizati

May 9, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 9, 2023 AVIDITY BIOSCIENCES,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 9, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organizatio

May 9, 2023 EX-10.1

Amended and Restated Non-Employee Director Compensation Program

Exhibit 10.1 AVIDITY BIOSCIENCES, INC. NON-EMPLOYEE DIRECTOR COMPENSATION PROGRAM (As Amended and Restated Effective April 25, 2023) Non-employee members of the board of directors (the “Board”) of Avidity Biosciences, Inc. (the “Company”) shall receive cash and equity compensation as set forth in this Non-Employee Director Compensation Program (as amended to date, this “Program”). This Program has

May 9, 2023 EX-99.1

Avidity Biosciences Reports First Quarter 2023 Financial Results and Recent Highlights Positive Topline Data from AOC 1001 Phase 1/2 MARINA™ Trial Demonstrated Functional Improvement, Disease Modification and Favorable Safety and Tolerability Profile

Exhibit 99.1 Avidity Biosciences Reports First Quarter 2023 Financial Results and Recent Highlights Positive Topline Data from AOC 1001 Phase 1/2 MARINA™ Trial Demonstrated Functional Improvement, Disease Modification and Favorable Safety and Tolerability Profile in People Living with Myotonic Dystrophy Type 1 Advancing three programs in clinical trials with data expected later this year - first l

May 9, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2023 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-39321 Avidity Biosciences, Inc. (Exact name

April 28, 2023 ARS

ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One)  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2022 OR  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number: 001-39321 AVIDITY BIOSCIENCES, INC.

April 28, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14

April 28, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

April 27, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 27, 2023 AVIDITY BIOSCIENCE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 27, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiza

April 27, 2023 EX-99.1

1 Investor & Analyst Event Series – Volume 7 AOC 1001 MARINATM Phase 1/2 Topline Data Kristl, Zen & Loraine living with DM1 Nathan living with DMD Josh living with FSHD 2 Forward-Looking Statements We caution the reader that this presentation contain

a04-27x23vol7marinatopli 1 Investor & Analyst Event Series – Volume 7 AOC 1001 MARINATM Phase 1/2 Topline Data Kristl, Zen & Loraine living with DM1 Nathan living with DMD Josh living with FSHD 2 Forward-Looking Statements We caution the reader that this presentation contains forward-looking statements that involve substantial risks and uncertainties.

March 30, 2023 8-K

Regulation FD Disclosure, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 30, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organiza

February 28, 2023 EX-10.5

Avidity Biosciences, Inc. 2022 Employment Inducement Incentive Award Plan, including form of stock option grant notice and stock option agreement and form of restricted stock unit grant notice and restricted stock unit agreement thereunder.

Exhibit 10.5 AVIDITY BIOSCIENCES, INC. 2022 EMPLOYMENT INDUCEMENT INCENTIVE AWARD PLAN ARTICLE I. PURPOSE The Plan’s purpose is to enhance the Company’s ability to attract, retain and motivate Eligible Persons who are expected to make important contributions to the Company by providing these individuals with equity ownership opportunities. Capitalized terms used in the Plan are defined in Article

February 28, 2023 EX-10.2

Avidity Biosciences, Inc. 2020 Incentive Award Plan, including form of stock option grant notice and stock option agreement and form of restricted stock unit grant notice and restricted stock unit agreement thereunder.

Exhibit 10.2 AVIDITY BIOSCIENCES, INC. 2020 INCENTIVE AWARD PLAN ARTICLE I. PURPOSE The Plan’s purpose is to enhance the Company’s ability to attract, retain and motivate persons who make (or are expected to make) important contributions to the Company by providing these individuals with equity ownership opportunities. Capitalized terms used in the Plan are defined in Article XI. ARTICLE II. ELIGI

February 28, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 28, 2023 AVIDITY BIOSCIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 28, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

February 28, 2023 EX-10.7

Employment Letter Agreement, dated February 23, 2023, by and between Arthur A. Levin, Ph.D. and the Registrant.

Exhibit 10.7 February 23, 2023 Arthur A. Levin, Ph.D. c/o Avidity Biosciences, Inc. 10578 Science Center Drive, Suite 125 San Diego, CA 92121 Re: Second Amended and Restated Employment Agreement Dear Art: Avidity Biosciences, Inc. (the “Company”) and you entered into that certain Amended and Restated Employment Agreement, dated as of May 15, 2020 (the “Original Agreement”). The Company and you des

February 28, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2022 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number: 001-39321 AVIDITY BIOSCIENCES, INC.

February 28, 2023 EX-99.1

Avidity Biosciences Reports Fourth Quarter and Year-End 2022 Financial Results and Recent Highlights

Exhibit 99.1 Avidity Biosciences Reports Fourth Quarter and Year-End 2022 Financial Results and Recent Highlights SAN DIEGO, February 28, 2023 / PRNewswire/ - Avidity Biosciences, Inc. (Nasdaq: RNA), a biopharmaceutical company committed to delivering a new class of RNA therapeutics called Antibody Oligonucleotide Conjugates (AOCs™), today reported financial results for the fourth quarter and year

February 23, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 22, 2023 AVIDITY BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39321 46-1336960 (State or other jurisdiction of incorporation or organ

February 14, 2023 SC 13G/A

RNA / Prosensa Holding N.v. In Liquidatie / PRICE T ROWE ASSOCIATES INC /MD/ Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3) AVIDITY BIOSCIENCES INC (Name of Issuer) COMMON STOCK (Title of Class of Securities) 05370A108 (CUSIP NUMBER) December 31, 2022 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule pursuant to which this Sched

February 14, 2023 SC 13G/A

RNA / Prosensa Holding N.v. In Liquidatie / EcoR1 Capital, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2) Avidity Biosciences, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 05370A108 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate t

February 9, 2023 SC 13G

RNA / Prosensa Holding N.v. In Liquidatie / VANGUARD GROUP INC - SCHEDULE 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Avidity Biosciences Inc. Title of Class of Securities: Common Stock CUSIP Number: 05370A108 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 13d-1(b)

February 9, 2023 SC 13G/A

RNA / Prosensa Holding N.v. In Liquidatie / FMR LLC Passive Investment

SC 13G/A 1 filing.txt SCHEDULE 13G Amendment No.4 AVIDITY BIOSCIENCES INC COMMON STOCK Cusip #05370A108 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [x] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) Cusip #05370A108 Item 1: Reporting Person - FMR LLC Item 2: (a) [ ] (b) [ ] Item 4: Delaware Item 5: 4,913,910 Item 6: 0 Item 7: 4,925,377 Item 8: 0 Ite

February 3, 2023 SC 13G

RNA / Prosensa Holding N.v. In Liquidatie / STATE STREET CORP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 INITIAL FILING AVIDITY BIOSCIENCES INC (NAME OF ISSUER) COMMON STOCK (TITLE OF CLASS OF SECURITIES) 05370A108 (CUSIP NUMBER) 12/31/2022 (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT) CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUANT TO WHICH THIS SCHEDULE I

February 3, 2023 SC 13G/A

RNA / Prosensa Holding N.v. In Liquidatie / BlackRock Inc. Passive Investment

us05370a1088020323.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 2) AVIDITY BIOSCIENCES INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 05370A108 - (CUSIP Number) December 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursua

February 2, 2023 SC 13D/A

RNA / Prosensa Holding N.v. In Liquidatie / RTW INVESTMENTS, LP - AVIDITY BIOSCIENCES, INC. Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 1) Avidity Biosciences, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 05370A108 (CUSIP Number

January 11, 2023 SC 13G/A

RNA / Prosensa Holding N.v. In Liquidatie / Cowen Financial Products LLC - COWEN FINANCIAL PRODUCTS LLC Passive Investment

SC 13G/A 1 rnaa111123.htm COWEN FINANCIAL PRODUCTS LLC UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Avidity Biosciences, Inc (Name of Issuer) Common Stock (Title of Class of Securities) 05370A108 (CUSIP Number) December 30, 2022 (Date of Event which Requires Filing of this Statement) Check the appr

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