PI / Impinj, Inc. - SEC-Einreichungen, Jahresbericht, Proxy Statement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Impinj, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 400 Fairview Avenue North, Suite 1200 Seattle, Washington 98109 (Ad

Impinj, Inc. Conflict Minerals Report For the Reporting Period from January 1, 2025 to December 31, 2025

Exhibit 1.01 Impinj, Inc. Conflict Minerals Report For the Reporting Period from January 1, 2025 to December 31, 2025 Part I. Introduction This Conflict Minerals Report of Impinj, Inc. for the reporting period January 1, 2025 to December 31, 2025 (the “Reporting Period”) has been prepared in accordance with Rule 13p-1 and Form SD promulgated under the Securities Exchange Act of 1934, as amended (t

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 28, 2026 Impinj, Inc. (Exact

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 28, 2026 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Number)

IMPINJ, INC. 2026 EQUITY INCENTIVE PLAN

IMPINJ, INC. 2026 EQUITY INCENTIVE PLAN 1. Purposes of the Plan. The purposes of this Plan are: • to attract and retain the best available personnel for positions of substantial responsibility, • to provide additional incentive to Employees, Directors and Consultants, and • to promote the success of the Company’s business. The Plan permits the grant of Incentive Stock Options, Nonstatutory Stock O

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S‑8 REGISTRATION STATEMENT The Securities Act of 1933 IMPINJ, Inc. (Exact name of registrant as specified in its charter)

As filed with the Securities and Exchange Commission on May 28, 2026 Registration No.

Table 1: Newly Registered Securities

Calculation of Filing Fee Tables S-8 IMPINJ INC Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee 1 Equity Common Stock, $0.

IMPINJ, INC. OUTSIDE DIRECTOR COMPENSATION POLICY (as amended and restated April 15, 2026 and effective April 15, 2026 (the “Effective Date”))

IMPINJ, INC. OUTSIDE DIRECTOR COMPENSATION POLICY (as amended and restated April 15, 2026 and effective April 15, 2026 (the “Effective Date”)) Impinj, Inc. (the “Company”) believes that the granting of cash compensation and equity to members of its Board of Directors (the “Board,” and members of the Board, the “Directors”) represents an effective tool to attract, retain, and reward Directors who a

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): April 29, 2026 Impinj, Inc. (Exact

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): April 29, 2026 Impinj, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 ☐ TRANSITION REPORT PURSUANT TO SE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to .

Three Months Ending

Exhibit 99.1 Impinj Reports First Quarter 2026 Financial Results SEATTLE, WA, April 29, 2026– Impinj, Inc. (Nasdaq: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the first quarter ended March 31, 2026. “Our first-quarter results were solid, with revenue and adjusted EBITDA exceeding the top end of our guide range,” said Chris Diorio, Imp

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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

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

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 Proxy State

ARS

2025 Annual Report 2024UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Impinj Announces Partial Repurchase of 1.125% Convertible Notes due 2027

Impinj Announces Partial Repurchase of 1.125% Convertible Notes due 2027 SEATTLE, March 16, 2026 – Impinj, Inc. (Nasdaq: PI), today announced that it entered into separate, privately negotiated repurchase agreements with certain holders of its 1.125% Convertible Notes due 2027 (the “Notes”) to repurchase for cash (the “Repurchases”) approximately $40.2 million aggregate principal amount of the Not

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): March 11, 2026 Impinj, Inc. (Exact

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): March 11, 2026 Impinj, Inc.

IMPINJ, INC. SECOND AMENDMENT TO EMPLOYMENT AGREEMENT

IMPINJ, INC. SECOND AMENDMENT TO EMPLOYMENT AGREEMENT This Second Amendment to Employment Agreement (the “Amendment”) is made by and between Chris Diorio, Ph.D. (the “Executive”) and Impinj, Inc. (the “Company” and together with the Executive hereinafter collectively referred to as the “Parties”) on December 19, 2025. WITNESSETH: WHEREAS, the Parties previously entered into an employment offer let

10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☑ 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 ☐ 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 001-37824 IMPINJ, INC. (Exact name o

In addition to restricting you from buying and selling securities while you possess material, nonpublic information, this Policy may also restrict your ability to enter into certain risky securities transactions or transactions that could easily lead

IMPINJ, INC. INSIDER TRADING POLICY (As amended March 22, 2023) 1. POLICY OVERVIEW The purpose of this Insider Trading Policy (“Policy”) is to ensure that all directors, officers, employees, consultants, contractors and agents (e.g. auditors, consultants, board observers and attorneys) of Impinj, Inc. and its subsidiaries (“Company”) trade and transact the Company’s securities lawfully and ethical

IMPINJ, INC. DESCRIPTION OF COMMON STOCK

Exhibit 4.1 IMPINJ, INC. DESCRIPTION OF COMMON STOCK The common stock of Impinj, Inc. is listed on the Nasdaq Global Select Market under the symbol “PI.” All outstanding shares of common stock are validly issued, fully paid, and nonassessable. The following description of the terms of our common stock is not complete and is qualified in its entirety by reference to our certificate of incorporation

FIFTH AMENDMENT TO OFFICE LEASE EXHIBIT A EXHIBIT B TENANT WORK LETTER

400 FAIRVIEW Impinj, Inc. Fifth Amendment 4920-6434-1099.7 377636.00029/10-29-25 - FIFTH AMENDMENT TO OFFICE LEASE This FIFTH AMENDMENT TO OFFICE LEASE (this "Fifth Amendment") is entered into as of October 24, 2025 (the "Effective Date"), by and between 400 FAIRVIEW AVENUE LLC, a Delaware limited liability company ("Landlord"), and IMPINJ, INC., a Delaware corporation ("Tenant"). RECITALS A. Land

As filed with the Securities and Exchange Commission on February 9, 2026

As filed with the Securities and Exchange Commission on February 9, 2026 Registration No.

Other Provisions

Impinj, Inc. Executive Change in Control and Severance Policy Effective as of December 19, 2025 (the “Effective Date”) This Executive Change in Control and Severance Policy (the “Policy”) is designed to provide certain protections to a select group of key executives of Impinj, Inc. (“Impinj” or the “Company”) or any of its subsidiaries in connection with a change in control of Impinj or in connect

Calculation of Filing Fee Tables Form S-8 (Form Type) Impinj, Inc. (Exact name of registrant as specified in its charter)

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Impinj, Inc. (Exact name of registrant as specified in its charter) Table 1 – Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Common Stock, $0.001 par value per

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 5, 2026 Impinj, Inc. (Exac

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 5, 2026 Impinj, Inc.

Three Months Ending

Exhibit 99.1 Impinj Reports Fourth Quarter and Full Year 2025 Financial Results SEATTLE, WA, February 5, 2026– Impinj, Inc. (Nasdaq: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the fourth quarter and year ended December 31, 2025. “2025 was a transition year for Impinj. We grew year-over-year endpoint IC volumes, made M800 our volume ru

Impinj Announces Preliminary Fourth-Quarter 2025 Revenue and Adjusted EBITDA Ahead of Participation at 28th Annual Needham Growth Conference

Exhibit 99.1 Impinj Announces Preliminary Fourth-Quarter 2025 Revenue and Adjusted EBITDA Ahead of Participation at 28th Annual Needham Growth Conference SEATTLE, January 13, 2026 – Impinj, Inc. (Nasdaq: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced that it expects fourth-quarter 2025 revenue near the high end of its prior guidance of $90.0 to $93.0 million and

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 13, 2026 Impinj, Inc. (Ex

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 13, 2026 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Numb

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): December 19, 2025 Impinj, Inc. (Exa

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): December 19, 2025 Impinj, Inc.

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): October 30, 2025 Impinj, Inc. (Exac

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): October 30, 2025 Impinj, Inc.

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): October 29, 2025 Impinj, Inc. (Exac

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): October 29, 2025 Impinj, Inc.

Three Months Ending

Exhibit 99.1 Impinj Reports Third Quarter 2025 Financial Results SEATTLE, WA, October 29, 2025– Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the third quarter ended September 30, 2025. “Our third-quarter results were strong, with revenue and adjusted EBITDA exceeding our guidance,” said Chris Diorio, Impinj co-foun

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 ☐ TRANSITION REPORT PURSUANT T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to .

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 20, 2025 Impinj, Inc. (Ex

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 20, 2025 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Numb

144

144 0002003074 XXXXXXXX LIVE 0001114995 IMPINJ INC 001-37824 400 FAIRVIEW AVENUE NORTH SUITE 1200 SEATTLE WA 98109 206-517-5300 SYLEBRA CAPITAL LLC Director COMMON STOCK Morgan Stanley & Co.

Impinj, Inc. Announces Upsize and Pricing of Offering of $170 Million of 0% Convertible Senior Notes Due 2029

Exhibit 99.1 Impinj, Inc. Announces Upsize and Pricing of Offering of $170 Million of 0% Convertible Senior Notes Due 2029 September 4, 2025 SEATTLE-September 4, 2025- Impinj, Inc. (Nasdaq: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced the pricing of $170 million aggregate principal amount of 0% Convertible Senior Notes due 2029 (the “notes”) in a private offeri

Unwind Date

Exhibit 10.1 Bidding Version [Dealer Dealer Address] [], 2025 To: Impinj, Inc. 400 Fairview Avenue North, Suite 1200 Seattle, WA 98109 Re: [Base][Additional] Call Option Transaction The purpose of this letter agreement (this “Confirmation”) is to confirm the terms and conditions of the call option transaction entered into between [Dealer] (“Dealer”) and Impinj, Inc., a Delaware corporation (“Count

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): September 3, 2025 Impinj, Inc. (Exa

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): September 3, 2025 Impinj, Inc.

IMPINJ, INC. AND U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee INDENTURE Dated as of September 8, 2025 0% Convertible Senior Notes due 2029

Exhibit 4.1 IMPINJ, INC. AND U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee INDENTURE Dated as of September 8, 2025 0% Convertible Senior Notes due 2029 TABLE OF CONTENTS Page Article 1 Definitions Section 1.01 . Definitions 1 Section 1.02 . References to Interest 14 Article 2 Issue, Description, Execution, Registration and Exchange of Notes Section 2.01 . Designation and Amount 14 Sect

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): September 2, 2025 Impinj, Inc. (Exa

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): September 2, 2025 Impinj, Inc.

Impinj, Inc. Announces Proposed Private Offering of $150 Million of Convertible Senior Notes Due 2029

Exhibit 99.1 Impinj, Inc. Announces Proposed Private Offering of $150 Million of Convertible Senior Notes Due 2029 September 2, 2025 SEATTLE-September 2, 2025- Impinj, Inc. (Nasdaq: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced its intention to offer, subject to market conditions and other factors, $150 million aggregate principal amount of Convertible Senior No

144

144 0001677721 XXXXXXXX LIVE 0001114995 IMPINJ INC 001-37824 400 FAIRVIEW AVENUE NORTH SUITE 1200 SEATTLE WA 98109 206-517-5300 DIORIO CHRIS PH.

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): July 30, 2025 Impinj, Inc. (Exact n

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): July 30, 2025 Impinj, Inc.

Separation and Release of Claims Agreement, dated May 30, 2025, between the registrant and Hussein Mecklai

SEPARATION AND RELEASE OF CLAIMS AGREEMENT This Separation and Release of Claims Agreement (“Agreement”) is entered into as of 5/30/2025 by and between Hussein Mecklai, his marital community, heirs and assigns (the “Employee”), and Impinj Inc.

Three Months Ending

Exhibit 99.1 Impinj Reports Second Quarter 2025 Financial Results SEATTLE, WA, July 30, 2025– Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the second quarter ended June 30, 2025. “Our second-quarter results were strong, with revenue and adjusted EBITDA exceeding our guidance,” said Chris Diorio, Impinj co-founder a

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SEC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to .

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 5, 2025 Impinj, Inc. (Exact

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 5, 2025 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Number)

Conflict Minerals Report for the reporting period from January 1, 2024 to December 31, 2024.

Exhibit 1.01 Impinj, Inc. Conflict Minerals Report For the Reporting Period from January 1, 2024 to December 31, 2024 Part I. Introduction This Conflict Minerals Report of Impinj, Inc. for the reporting period January 1, 2024 to December 31, 2024 (the “Reporting Period”) has been prepared in accordance with Rule 13p-1 and Form SD promulgated under the Securities Exchange Act of 1934, as amended (t

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Impinj, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S Employer Identification No.) 400 Fairview Avenue North, Suite 1200 Seattle, Washington 98109 (Add

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 20, 2025 Impinj, Inc. (Exact

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 20, 2025 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Number)

Three Months Ending

Exhibit 99.1 Impinj Reports First Quarter 2025 Financial Results SEATTLE, WA, April 23, 2025– Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the first quarter ended March 31, 2025. “Our first-quarter execution was solid, with revenue and profitability exceeding our guidance,” said Chris Diorio, Impinj co-founder and

Separation and Release of Claims Agreement, dated February 24, 2025, between the registrant and Jeff Dossett

SEPARATION AND RELEASE OF CLAIMS AGREEMENT This Separation and Release of Claims Agreement (“Agreement”) is entered into as of 2/24/2025 2025 by and between Jeff Dossett, his marital community, heirs, and assigns, (the “Employee”) and Impinj Inc.

ARS

Annual Report 2024UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K  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  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 001-37824 IMPINJ,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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

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

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 Proxy State

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 23, 2025 Impinj, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 ☐ TRANSITION REPORT PURSUANT TO SE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to .

Impinj, Inc. Insider Trading Policy

IMPINJ, INC. INSIDER TRADING POLICY (As amended March 22, 2023) 1. POLICY OVERVIEW The purpose of this Insider Trading Policy (“Policy”) is to ensure that all directors, officers, employees, consultants, contractors and agents (e.g. auditors, consultants, board observers and attorneys) of Impinj, Inc. and its subsidiaries (“Company”) trade and transact the Company’s securities lawfully and ethical

Description of Impinj, Inc.’s Common Stock

Exhibit 4.1 IMPINJ, INC. DESCRIPTION OF COMMON STOCK The common stock of Impinj, Inc. is listed on the Nasdaq Global Select Market under the symbol “PI.” All outstanding shares of common stock are validly issued, fully paid, and nonassessable. The following description of the terms of our common stock is not complete and is qualified in its entirety by reference to our certificate of incorporation

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Impinj, Inc. (Exact name of registrant as specified in its charter) Table 1 – Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Common Stock, $0.001 par value per

As filed with the Securities and Exchange Commission on February 10, 2025

As filed with the Securities and Exchange Commission on February 10, 2025 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☑ 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 ☐ 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 001-37824 IMPINJ, INC. (Exact name o

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 5, 2025 Impinj, Inc.

Three Months Ending

Exhibit 99.1 Impinj Reports Fourth Quarter and Full Year 2024 Financial Results SEATTLE, WA, February 5, 2025– Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the fourth quarter and year ended December 31, 2024. “In 2024, we delivered strong financial results, successfully resolved our patent litigation and delivered

Impinj Reiterates Fourth-Quarter 2024 Revenue and Adjusted EBITDA Guidance Ahead of Participation at 27th Annual Needham Growth Conference

Exhibit 99.1 Impinj Reiterates Fourth-Quarter 2024 Revenue and Adjusted EBITDA Guidance Ahead of Participation at 27th Annual Needham Growth Conference SEATTLE, January 14, 2025 – Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced that it expects fourth-quarter 2024 revenue to be within its prior guidance of $91.0 to $94.0 million and adjusted E

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): January 14, 2025 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Numb

PI / Impinj, Inc. / VANGUARD GROUP INC Passive Investment

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. 5)* (Name of Issuer) Impinj Inc (Title of Class of Securities) Common Stock (CUSIP Number) 453204109 (Date

PI / Impinj, Inc. / SYLEBRA CAPITAL LLC - SYLEBRA CAPITAL LLC Activist Investment

SC 13D/A 1 pia3110824.htm SYLEBRA CAPITAL LLC UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 3)* Impinj, Inc. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) Matthew Whitehead, Chief Operating Officer / Authorized Signatory 3000 El Camino

PI / Impinj, Inc. / SYLEBRA CAPITAL LLC - SYLEBRA CAPITAL LLC Activist Investment

SC 13D/A 1 pia2110624.htm SYLEBRA CAPITAL LLC UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* Impinj, Inc. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) Matthew Whitehead, Chief Operating Officer / Authorized Signatory 3000 El Camino

PI / Impinj, Inc. / SYLEBRA CAPITAL LLC - SYLEBRA CAPITAL LLC Activist Investment

SC 13D/A 1 pia1110524.htm SYLEBRA CAPITAL LLC UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* Impinj, Inc. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) Matthew Whitehead, Chief Operating Officer / Authorized Signatory 3000 El Camino

PI / Impinj, Inc. / VANGUARD GROUP INC Passive Investment

SC 13G/A 1 UnitedStates13GImpinjIncU.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. 4)* (Name of Issuer) Impinj Inc (Title of Class of Securities) Co

Three Months Ending

Exhibit 99.1 Impinj Reports Third Quarter 2024 Financial Results SEATTLE, WA, October 23, 2024– Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the third quarter ended September 30, 2024. “Our third-quarter results were strong, with revenue and profitability well above our guidance,” said Chris Diorio, Impinj co-found

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 ☐ TRANSITION REPORT PURSUANT T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to .

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 23, 2024 Impinj, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Impinj, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S Employer Identification No.) 400 Fairview Avenue North, Suite 1200 Seattle, Washington 98109 (Add

Conflict Minerals Report for the reporting period from January 1, 2023 to December 31, 2023.

Exhibit 1.01 Impinj, Inc. Conflict Minerals Report For the Reporting Period from January 1, 2023 to December 31, 2023 Part I. Introduction This Conflict Minerals Report of Impinj, Inc. for the reporting period January 1, 2023 to December 31, 2023 (the “Reporting Period”)has been prepared in accordance with Rule 13p-1 and Form SD promulgated under the Securities Exchange Act of 1934, as amended (th

PI / Impinj, Inc. / BlackRock, Inc. Passive Investment

SC 13G/A 1 us4532041096100724.txt us4532041096100724.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 5) IMPINJ INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 453204109 - (CUSIP Number) September 30, 2024 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to des

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 24, 2024 Impinj, Inc.

Three Months Ending

Exhibit 99.1 Impinj Reports Second Quarter 2024 Financial Results SEATTLE, WA, July 24, 2024– Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the second quarter ended June 30, 2024. “Our second-quarter results were strong, setting several new records,” said Chris Diorio, Impinj co-founder and CEO. “Revenue topped $100

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 ☐ TRANSITION REPORT PURSUANT TO SEC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to .

PI / Impinj, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0017-impinjinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)* Name of issuer: Impinj Inc Title of Class of Securities: Common Stock CUSIP Number: 453204109 Date of Event Which Requires Filing of this Statement: June 28, 2024 Check the appropriate box to designate the rule pursuant

PI / Impinj, Inc. / SYLEBRA CAPITAL LLC - SYLEBRA CAPITAL LLC Activist Investment

SC 13D 1 piainitial61024.htm SYLEBRA CAPITAL LLC UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 Impinj, Inc. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) Matthew Whitehead, Chief Operating Officer / Authorized Signatory 3000 El Camino Real, Building 5

Certificate of Amendment to the Amended and Restated Certificate of Incorporation of Impinj, Inc., as filed with the Secretary of State of the State of Delaware on June 6, 2024

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO THE AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF IMPINJ, INC. Impinj, Inc., a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), hereby certifies as follows: 1. The name of the Corporation is Impinj, Inc. The Corporation’s original Certificate of Incorporation was filed with the Secretary of State of the S

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

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): June 6, 2024 Impinj, Inc.

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)) ☐ Defi

Settlement and Patent Cross-License Agreement, dated as of March 13, 2024, by and among Impinj, Inc., NXP Semiconductors N.V. and NXP USA, Inc

CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED.

Impinj, Inc. Outside Director Compensation Policy (as amended April 11, 2024 and effective March 31, 2024).

IMPINJ, INC. OUTSIDE DIRECTOR COMPENSATION POLICY (as amended April [12], 2024 and effective March 31, 2024 (the “Effective Date”)) Impinj, Inc. (the “Company”) believes that the granting of cash compensation and equity to members of its Board of Directors (the “Board,” and members of the Board, the “Directors”) represents an effective tool to attract, retain, and reward Directors who are not empl

Three Months Ending

Exhibit 99.1 Impinj Reports First Quarter 2024 Financial Results SEATTLE, WA, April 24, 2024– Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the first quarter ended March 31, 2024. “2024 started strong, with revenue and profitability exceeding both our fourth-quarter results and first-quarter guidance,” said Chris Di

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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

ARS

Annual Report 202381,7('67$7(6 6(&85,7,(6$1'(;&+$1*(&200,66,21 :DVKLQJWRQ'& )250.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 ☐ TRANSITION REPORT PURSUANT TO SE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to .

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

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 24, 2024 Impinj, Inc.

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. 1)

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. 1) 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)) ☐ Defi

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

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 Proxy State

Entry into a Material Definitive Agreement

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): March 13, 2024 Impinj, Inc.

PI / Impinj, Inc. / DIORIO CHRIS PH.D. - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6)* Impinj, Inc. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 453204109 (CUSIP Number) December 31, 2023 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedu

PI / Impinj, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01171-impinjinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: Impinj Inc Title of Class of Securities: Common Stock CUSIP Number: 453204109 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule purs

Impinj, Inc. Amended and Restated Compensation Recovery Policy

Impinj, Inc. AMENDED AND RESTATED COMPENSATION RECOVERY POLICY As initially adopted on February 23, 2023 and as amended August 9, 2023 Impinj, Inc. (the “Company”) is committed to strong corporate governance. As part of this commitment, the Company’s Board of Directors (the “Board”) has adopted this Amended and Restated Compensation Recovery Policy (the “Policy”), which Policy supersedes in full t

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Impinj, Inc. (Exact name of registrant as specified in its charter) Table 1 – Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Common Stock, $0.001 par value per

Subsidiaries of the registrant

Exhibit 21.1 SUBSIDIARIES OF IMPINJ, INC. Name of Subsidiary State or other Jurisdiction of Incorporation Impinj Internation Ltd. Cayman Islands Impinj RFID Technology (Shanghai) Co., Ltd. China Impinj UK Limited United Kingdom PI Operations (Thailand) Co. Ltd. Thailand Impinj Malaysia SDN. BHD. Malaysia Impinj Brazil Limitada Brazil

As filed with the Securities and Exchange Commission on February 12, 2024

As filed with the Securities and Exchange Commission on February 12, 2024 Registration No.

Executive Employment Agreement, dated November 13, 2018 between the registrant and Hussein Mecklai

Exhibit 10.28 IMPINJ, INC. EXECUTIVE EMPLOYMENT AGREEMENT This Executive Employment Agreement (the “Agreement”) is entered into as of November 13, 2018 (the “Effective Date”) by and between Hussein Mecklai (“Executive”) and Impinj, Inc., a Delaware corporation (the “Company”), and sets forth the terms and conditions with respect to Executive’s employment with the Company during the Employment Term

Description of Impinj, Inc.’s Common Stock

Exhibit 4.1 IMPINJ, INC. DESCRIPTION OF COMMON STOCK The common stock of Impinj, Inc. is listed on the Nasdaq Global Select Market under the symbol “PI.” All outstanding shares of common stock are validly issued, fully paid, and nonassessable. The following description of the terms of our common stock is not complete and is qualified in its entirety by reference to our certificate of incorporation

Executive Employment and Abritration Agreement dated December 29, 2022 between the registrant and Cathal Phelan

Certain portions of this exhibit have been redacted pursuant to Item 601(b)(10) of Regulation S-K and, where applicable, have been marked with “[***]” to indicate where redactions have been made.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☑ 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 ☐ 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 001-37824 IMPINJ, INC. (Exact name o

PI / Impinj, Inc. / FMR LLC Passive Investment

SCHEDULE 13G Amendment No.1 IMPINJ INC COMMON STOCK Cusip #453204109 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 #453204109 Item 1: Reporting Person - FMR LLC Item 2: (a) [ ] (b) [ ] Item 4: Delaware Item 5: 4,057,773 Item 6: 0 Item 7: 4,058,341 Item 8: 0 Item 9: 4,058,341 Item 11: 14.999% Ite

Three Months Ending

Exhibit 99.1 Impinj Reports Fourth Quarter and Full Year 2023 Financial Results SEATTLE, WA, February 8, 2024– Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the fourth quarter and year ended December 31, 2023. “2023 was another year of solid growth despite market headwinds, with annual revenue crossing the $300 mill

Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities, Results of Operations and Financial Condition

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 8, 2024 Impinj, Inc.

PI / Impinj, Inc. / Invesco Ltd. - SEC SCHEDULE 13G Passive Investment

SC 13G/A 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. 1 )* Impinj Inc (Name of Issuer) Common Stock (Title of Class of Securities) 453204109 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designat

PI / Impinj, Inc. / BlackRock Inc. Passive Investment

SC 13G/A 1 us4532041096012624.txt us4532041096012624.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 4) IMPINJ INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 453204109 - (CUSIP Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desi

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): January 16, 2024 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Numb

Impinj Announces Preliminary Fourth-Quarter 2023 Revenue and Adjusted EBITDA Ahead of Participation at 26th Annual Needham Growth Conference

Exhibit 99.1 Impinj Announces Preliminary Fourth-Quarter 2023 Revenue and Adjusted EBITDA Ahead of Participation at 26th Annual Needham Growth Conference SEATTLE, January 16, 2024 – Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced that it expects fourth-quarter 2023 revenue to exceed $70 million, above its prior guidance of $65.5 to $68.5 mill

PI / Impinj Inc / Sylebra Capital Ltd - SYLEBRA CAPITAL LIMITED Activist Investment

SC 13D/A 1 pia8111623.htm SYLEBRA CAPITAL LIMITED UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 8)* Impinj, Inc. (Name of Issuer) Common STock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) Matthew Whitehead, Chief Operating Officer / Authorized Signatory 20/F, 28 He

Three Months Ending

Exhibit 99.1 Impinj Reports Third Quarter 2023 Financial Results SEATTLE, WA, October 25, 2023 – Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the third quarter ended September 30, 2023. “Third-quarter results were solid, with profitability exceeding our expectations,” said Chris Diorio, Impinj co-founder and CEO. “

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 25, 2023 Impinj, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 ☐ TRANSITION REPORT PURSUANT T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to .

PI / Impinj Inc / Sylebra Capital Ltd - SYLEBRA CAPITAL LIMITED Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 7)* Impinj, Inc. (Name of Issuer) Common STock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) Matthew Whitehead, Chief Operating Officer / Authorized Signatory 20/F, 28 Hennessy Road, Wan Chai, Hong Kong +1 332 242 8518 (

PI / Impinj Inc / Sylebra Capital Ltd - SYLEBRA CAPITAL LIMITED Activist Investment

SC 13D/A 1 pia681723.htm SYLEBRA CAPITAL LIMITED UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 6)* Impinj, Inc. (Name of Issuer) Common STock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) Matthew Whitehead, Chief Operating Officer / Authorized Signatory 20/F, 28 Hen

Three Months Ending

Exhibit 99.1 Impinj Reports Second Quarter 2023 Financial Results SEATTLE, WA, July 26, 2023– Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the second quarter ended June 30, 2023. “Second-quarter revenue set a new record, with strong systems revenue offsetting weak endpoint IC revenue from retail apparel inventory d

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): July 26, 2023 Impinj, Inc. (Exact n

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): July 26, 2023 Impinj, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 ☐ TRANSITION REPORT PURSUANT TO SEC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37824 IMPINJ, INC.

Unanimous Written Consent of the Board of Directors of Impinj, Inc., effective June 26, 2023

Exhibit 99.1 Unanimous written consent OF THE BOARD OF DIRECTORS OF IMPINJ, INC. Pursuant to Section 141(f) of the Delaware General Corporation Law (the “DGCL”) and the bylaws of Impinj, Inc., a Delaware corporation (the “Corporation”), the undersigned, constituting all of the members of the board of directors of the Corporation (the “Board”), hereby adopt the following resolutions: Ratification R

LETTER

United States securities and exchange commission logo July 17, 2023 Cary Baker Chief Financial Officer Impinj, Inc.

PI / Impinj 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: Impinj Inc. Title of Class of Securities: Common Stock CUSIP Number: 453204109 Date of Event Which Requires Filing of this Statement: June 30, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 13d-1(

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, 2023 Impinj, Inc. (Exact

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, 2023 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Number)

Andy Cobb Vice President, Strategic Finance

EX-99.1 Exhibit 99.1 Andy Cobb Vice President, Strategic Finance Forward Looking Statement & Non-GAAP Financial Measures This presentation and the accompanying oral data, estimates and forecasts that are based on income tax benefit (expense); and acquisition commentary contain forward-looking statements within independent industry publications or reports or other transaction expense and adjusted E

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 8, 2023 Impinj, Inc. (Exact

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 8, 2023 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Number)

PI / Impinj Inc / FMR LLC Passive Investment

SCHEDULE 13G Amendment No.0 IMPINJ INC COMMON STOCK Cusip #453204109 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 #453204109 Item 1: Reporting Person - FMR LLC Item 2: (a) [ ] (b) [ ] Item 4: Delaware Item 5: 2,813,832 Item 6: 0 Item 7: 2,815,362 Item 8: 0 Item 9: 2,815,362 Item 11: 10.563% Ite

May 23, 2023

CORRESP May 23, 2023 VIA EDGAR Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.

LETTER

United States securities and exchange commission logo May 9, 2023 Cary Baker Chief Financial Officer Impinj, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 INFORMATION 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)) ☐ De

ARS

2022 Annual ReportUNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☑ 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 Commission File Number 001-37824 IMPINJ, INC. (Exact name of registrant as

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

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 Proxy Stat

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 ☐ TRANSITION REPORT PURSUANT TO SE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37824 IMPINJ, INC.

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): April 26, 2023 Impinj, Inc. (Exact

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): April 26, 2023 Impinj, Inc.

Three Months Ending

Exhibit 99.1 Impinj Reports First Quarter 2023 Financial Results SEATTLE, WA, April 26, 2023– Impinj, Inc. (NASDAQ: PI), a leading provider and pioneer of RAIN RFID solutions, today released its financial results for the first quarter ended March 31, 2023. “Our first-quarter results were solid, with record revenue and a very strong multi-quarter endpoint IC backlog,” said Chris Diorio, Impinj co-f

Miron Washington Joins Impinj Board of Directors

Exhibit 99.1 Miron Washington Joins Impinj Board of Directors SEATTLE, March 27, 2023 – Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced that Miron Washington will join its board of directors effective April 2, 2023. “We are thrilled to welcome Miron to Impinj’s Board. Miron’s 25 years of experience in B2C/B2B ecommerce, global supply-chain op

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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): March 22, 2023 Impinj, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-37824 91-2041398 (State or Other Jurisdiction of Incorporation) (Commission File Number

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

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, 2023 Impinj, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-37824 91-2041398 (State or Other Jurisdiction of Incorporation) (Commission File Num

Amended and Restated Bylaws of Impinj, Inc. adopted as of February 23, 2023

Exhibit 3.1 AMENDED AND RESTATED BYLAWS OF IMPINJ, INC. (as amended and restated on February 23, 2023) TABLE OF CONTENTS Page Article I CORPORATE OFFICES 1 1.1 REGISTERED OFFICE 1 1.2 OTHER OFFICES 1 Article II MEETINGS OF STOCKHOLDERS 1 2.1 PLACE OF MEETINGS 1 2.2 ANNUAL MEETING 1 2.3 SPECIAL MEETING 1 2.4 ADVANCE NOTICE PROCEDURES 2 2.5 NOTICE OF STOCKHOLDERS’ MEETINGS 10 2.6 QUORUM 10 2.7 ADJOU

PI / IMPINJ Inc / GILDER GAGNON HOWE & CO LLC - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (RULE 13d - 102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (Amendment No. 1)* Impinj, Inc (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) December 31, 2022 (Date of Event which

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Impinj, Inc. (Exact name of registrant as specified in its charter) Table 1 – Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Common Stock, $0.001 par value per

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☑ 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 Commission File Number 001-37824 IMPINJ, INC. (Exact name of registrant as specified in its c

As filed with the Securities and Exchange Commission on February 13, 2023

As filed with the Securities and Exchange Commission on February 13, 2023 Registration No.

Executive Employment and Abritration Agreement dated December 29, 2022 between the registrant and Cathal Phelan

Certain portions of this exhibit have been redacted pursuant to Item 601(b)(10) of Regulation S-K and, where applicable, have been marked with “[***]” to indicate where redactions have been made.

Executive Employment Agreement, dated November 13, 2018 between the registrant and Hussein Mecklai

Exhibit 10.28 IMPINJ, INC. EXECUTIVE EMPLOYMENT AGREEMENT This Executive Employment Agreement (the “Agreement”) is entered into as of November 13, 2018 (the “Effective Date”) by and between Hussein Mecklai (“Executive”) and Impinj, Inc., a Delaware corporation (the “Company”), and sets forth the terms and conditions with respect to Executive’s employment with the Company during the Employment Term

Description of Impinj, Inc.’s Common Stock

Exhibit 4.1 IMPINJ, INC. DESCRIPTION OF COMMON STOCK The common stock of Impinj, Inc. is listed on the Nasdaq Global Select Market under the symbol “PI.” All outstanding shares of common stock are validly issued, fully paid, and nonassessable. The following description of the terms of our common stock is not complete and is qualified in its entirety by reference to our certificate of incorporation

Subsidiaries of the registrant

Exhibit 21.1 SUBSIDIARIES OF IMPINJ, INC. Name of Subsidiary State or other Jurisdiction of Incorporation Impinj Internation Ltd. Cayman Islands Impinj RFID Technology (Shanghai) Co., Ltd. China Impinj UK Limited United Kingdom PI Operations (Thailand) Co. Ltd. Thailand Impinj Malaysia SDN. BHD. Malaysia Impinj Brazil Limitada Brazil

JOINT FILING AGREEMENT

Invesco Joint Filing Agreement JOINT FILING AGREEMENT In accordance with Rule 13d-1(k) (l) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing of the attached Schedule 13G, and any and all amendments thereto, and expressly authorize Invesco Ltd.

PI / IMPINJ Inc / Invesco Ltd. - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Impinj Inc (Name of Issuer) Common Stock (Title of Class of Securities) 453204109 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is f

PI / IMPINJ Inc / VANGUARD GROUP INC - SCHEDULE 13G Passive Investment

SC 13G 1 tv01133-impinjinc.htm SCHEDULE 13G SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Impinj Inc. Title of Class of Securities: Common Stock CUSIP Number: 453204109 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Sche

Three Months Ending

Exhibit 99.1 Impinj Reports Fourth Quarter and Full Year 2022 Financial Results SEATTLE, WA, February 8, 2023– Impinj, Inc. (NASDAQ: PI), a leading provider and pioneer of RAIN RFID solutions, today released its financial results for the fourth quarter and year ended December 31, 2022. “2022 was a very strong year for Impinj,” said Chris Diorio, Impinj co-founder and CEO. “We delivered record reve

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 8, 2023 Impinj, Inc.

PI / IMPINJ Inc / BlackRock Inc. Passive Investment

SC 13G/A 1 us4532041096013123.txt us4532041096013123.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 3) IMPINJ INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 453204109 - (CUSIP Number) December 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desi

Impinj Announces Preliminary Fourth-Quarter 2022 Revenue Ahead of Participation at 25th Annual Needham Growth Conference

Exhibit 99.1 Impinj Announces Preliminary Fourth-Quarter 2022 Revenue Ahead of Participation at 25th Annual Needham Growth Conference SEATTLE, January 10, 2023 – Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced that it expects fourth-quarter 2022 revenue to exceed $76 million, above its prior guidance of $71.5 – $73.5 million. The company also

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): January 10, 2023 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Numb

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): December 29, 2022 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Num

PI / IMPINJ Inc / Sylebra Capital Ltd - SYLEBRA CAPITAL LIMITED Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 5)* Impinj, Inc. (Name of Issuer) Common STock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) Matthew Whitehead, Chief Operating Officer / Authorized Signatory 20/F, 28 Hennessy Road, Wan Chai, Hong Kong +852 3002 3788 (N

PI / IMPINJ Inc / Sylebra Capital Ltd - SYLEBRA CAPITAL LIMITED Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 4)* Impinj, Inc. (Name of Issuer) Common STock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) Matthew Whitehead, Chief Operating Officer / Authorized Signatory 20/F, 28 Hennessy Road, Wan Chai, Hong Kong +852 3002 3788 (N

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Impinj, Inc. (Exact name of registrant as specified in its charter) Table 1 ? Newly Registered Securities CALCULATION OF REGISTRATION FEE Title of each class of securities to be registered Amount to be registered(1)(2) Proposed maximum offering price per security(3) Proposed maximum aggregate offering price(3) Amount of registration

As filed with the Securities and Exchange Commission on November 3, 2022

Table of Contents As filed with the Securities and Exchange Commission on November 3, 2022 Registration No.

Form of Indenture

Exhibit 4.3 IMPINJ, 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 4 Section 1.3 Incorporation by Reference of Trust Indenture Act 4 Section 1.4 Rules of Construction 5 ARTICLE II THE SECURITIES 5 Section 2.1 Issuable in Series 5 Section 2.2 Establishment of Terms of Se

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 ☐ TRANSITION REPORT PURSUANT T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37824 IMPINJ, INC.

Three Months Ending

Exhibit 99.1 Impinj Reports Third Quarter 2022 Financial Results SEATTLE, WA, October 26, 2022? Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the third quarter ended September 30, 2022. ?Our third-quarter results were strong, with both endpoint IC and reader IC revenue setting new quarterly records,? said Chris Dior

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 26, 2022 Impinj, Inc.

Amended and Restated Bylaws of Impinj, Inc.

Exhibit 3.1 AMENDED AND RESTATED BYLAWS OF IMPINJ, INC. (as amended and restated on August 10, 2022) TABLE OF CONTENTS Page Article I CORPORATE OFFICES 1 1.1 REGISTERED OFFICE 1 1.2 OTHER OFFICES 1 Article II MEETINGS OF STOCKHOLDERS 1 2.1 PLACE OF MEETINGS 1 2.2 ANNUAL MEETING 1 2.3 SPECIAL MEETING 1 2.4 ADVANCE NOTICE PROCEDURES 2 2.5 NOTICE OF STOCKHOLDERS? MEETINGS 8 2.6 QUORUM 9 2.7 ADJOURNED

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A (Amendment No. 1) 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, 2022 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Comm

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, 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): August 10, 2022 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Numbe

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 ☐ TRANSITION REPORT PURSUANT TO SEC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37824 IMPINJ, INC.

Impinj, Inc. Amended and Restated Outside Director Compensation Policy, as amended May 26, 2022

Exhibit 10.1 IMPINJ, INC. OUTSIDE DIRECTOR COMPENSATION POLICY (as amended May 26, 2022 (the ?Effective Date?)) Impinj, Inc. (the ?Company?) believes that the granting of cash compensation and equity to members of its Board of Directors (the ?Board,? and members of the Board, the ?Directors?) represents an effective tool to attract, retain, and reward Directors who are not employees of the Company

Three Months Ending

Exhibit 99.1 Impinj Reports Second Quarter 2022 Financial Results SEATTLE, WA, July 27, 2022? Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the second quarter ended June 30, 2022. ?Our second-quarter results were strong, with revenue and profitability exceeding our guidance,? said Chris Diorio, Impinj co-founder and

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 27, 2022 Impinj, Inc.

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): June 7, 2022 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Number)

Submission of Matters to a Vote of Security Holders

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, 2022 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Number)

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37824 IMPINJ, INC.

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 27, 2022 Impinj, Inc.

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

DEF 14A 1 d332406ddef14a.htm DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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 permit

Three Months Ending

Exhibit 99.1 Impinj Reports First Quarter 2022 Financial Results SEATTLE, WA, April 27, 2022? Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the first quarter ended March 31, 2022. ?Our first-quarter results were strong, with demand for our endpoint ICs, reader ICs, readers and gateways all showing extraordinary stre

Amended and Restated Bylaws of Impinj, Inc. adopted as of April 18, 2022

Exhibit 3.1 AMENDED AND RESTATED BYLAWS OF IMPINJ, INC. (as amended and restated on April 18, 2022) TABLE OF CONTENTS Page ARTICLE I CORPORATE OFFICES 1 1.1 REGISTERED OFFICE 1 1.2 OTHER OFFICES 1 ARTICLE II MEETINGS OF STOCKHOLDERS 1 2.1 PLACE OF MEETINGS 1 2.2 ANNUAL MEETING 1 2.3 SPECIAL MEETING 1 2.4 ADVANCE NOTICE PROCEDURES 2 2.5 NOTICE OF STOCKHOLDERS? MEETINGS 8 2.6 QUORUM 9 2.7 ADJOURNED

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, 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): April 18, 2022 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Number

Calculation of Filing Fee Tables Form S-8 (Form Type) Impinj, Inc. (Exact name of registrant as specified in its charter)

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Impinj, Inc. (Exact name of registrant as specified in its charter) Table 1 ? Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Common Stock, $0.001 par value per

As filed with the Securities and Exchange Commission on February 14, 2022

As filed with the Securities and Exchange Commission on February 14, 2022 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-37824 IMPINJ, INC. (Exact name of registrant as specified in its c

PI / IMPINJ Inc / GILDER GAGNON HOWE & CO LLC - SCHEDULE 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (RULE 13d - 102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (Amendment No. )* Impinj, Inc (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 453204109 (CUSIP Number) December 31, 2021 (Date of Event which R

IMPINJ, INC. DESCRIPTION OF COMMON STOCK

Exhibit 4.1 IMPINJ, INC. DESCRIPTION OF COMMON STOCK The common stock of Impinj, Inc. is listed on the Nasdaq Global Select Market under the symbol ?PI.? All outstanding shares of common stock are validly issued, fully paid, and nonassessable. The following description of the terms of our common stock is not complete and is qualified in its entirety by reference to our certificate of incorporation

Three Months Ending

Exhibit 99.1 Impinj Reports Fourth Quarter and Full Year 2021 Financial Results SEATTLE, WA, February 9, 2022? Impinj, Inc. (NASDAQ: PI), a leading provider and pioneer of RAIN RFID solutions, today released its financial results for the fourth quarter and year ended December 31, 2021. ?Our fourth-quarter results capped a strong close to an exceptional year,? said Chris Diorio, Impinj co-founder a

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 9, 2022 Impinj, Inc.

PI / IMPINJ Inc / BlackRock Inc. Passive Investment

us4532041096020822.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 2) IMPINJ INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 453204109 - (CUSIP Number) December 31, 2021 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which t

PI / IMPINJ Inc / DIORIO CHRIS PH.D. - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5)* Impinj, Inc. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 453204109 (CUSIP Number) December 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedu

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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 1, 2022 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Numb

Steve Sanghi to Succeed Current Impinj Board Chair This Year; Meera Rao Joins the Impinj Board of Directors

Exhibit 99.2 Steve Sanghi to Succeed Current Impinj Board Chair This Year; Meera Rao Joins the Impinj Board of Directors SEATTLE, February 3, 2022 ? Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced that Director Steve Sanghi will become Impinj Board Chair after Peter van Oppen?s current term ends. Mr. van Oppen has decided not to stand for ree

IMPINJ, INC. OUTSIDE DIRECTOR COMPENSATION POLICY (as amended February 1, 2022 (the “Effective Date”))

Exhibit 99.1 IMPINJ, INC. OUTSIDE DIRECTOR COMPENSATION POLICY (as amended February 1, 2022 (the ?Effective Date?)) Impinj, Inc. (the ?Company?) believes that the granting of cash compensation and equity to members of its Board of Directors (the ?Board,? and members of the Board, the ?Directors?) represents an effective tool to attract, retain, and reward Directors who are not employees of the Com

Impinj Promotes Hussein Mecklai to Chief Operating Officer

Exhibit 99.3 Impinj Promotes Hussein Mecklai to Chief Operating Officer SEATTLE, February 3, 2022 ? Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced Hussein Mecklai?s promotion to chief operating officer. In his expanded role, Mecklai is directly responsible for Impinj?s engineering and operations. Mecklai joined Impinj in 2018 and has more th

Impinj Announces Preliminary Fourth-Quarter 2021 Revenue Ahead of Participation at 24th Annual Needham Virtual Growth Conference

Exhibit 99.1 Impinj Announces Preliminary Fourth-Quarter 2021 Revenue Ahead of Participation at 24th Annual Needham Virtual Growth Conference SEATTLE, January 10, 2022 ? Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced that it expects fourth-quarter 2021 revenue to exceed $52 million, above its prior guidance of $46.0 ? $48.0 million. The comp

Regulation FD Disclosure, 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): January 10, 2022 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Numb

Indenture, dated as of November 5, 2021, between Impinj, Inc., and U.S. Bank National Association, as trustee

Exhibit 4.1 IMPINJ, INC. AND U.S. BANK NATIONAL ASSOCIATION, as Trustee INDENTURE Dated as of November 5, 2021 1.125% Convertible Senior Notes due 2027 TABLE OF CONTENTS PAGE ARTICLE 1 DEFINITIONS Section 1.01 . Definitions 1 Section 1.02 . References to Interest 14 ARTICLE 2 ISSUE, DESCRIPTION, EXECUTION, REGISTRATION AND EXCHANGE OF NOTES Section 2.01 . Designation and Amount 14 Section 2.02 . F

Impinj, Inc. Announces Proposed Private Offering of $225 Million of Convertible Senior Notes Due 2027

Exhibit 99.1 Impinj, Inc. Announces Proposed Private Offering of $225 Million of Convertible Senior Notes Due 2027 SEATTLE ? November 1, 2021 ? Impinj, Inc. (Nasdaq: PI) a leading RAIN RFID provider and Internet of Things pioneer, today announced its intention to offer, subject to market conditions and other factors, $225 million aggregate principal amount of Convertible Senior Notes due 2027 (the

Impinj, Inc. Announces Upsize and Pricing of Offering of $250 Million of 1.125% Convertible Senior Notes Due 2027

Exhibit 99.2 Impinj, Inc. Announces Upsize and Pricing of Offering of $250 Million of 1.125% Convertible Senior Notes Due 2027 SEATTLE ? November 2, 2021 ? Impinj, Inc. (Nasdaq: PI) a leading RAIN RFID provider and Internet of Things pioneer, today announced the pricing of $250 million aggregate principal amount of Convertible Senior Notes due 2027 (the ?notes?) in a private offering (the ?offerin

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, 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 1, 2021 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Numb

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37824 IMPINJ, INC.

Three Months Ending

Exhibit 99.1 Impinj Reports Third Quarter 2021 Financial Results SEATTLE, WA, Oct. 27, 2021? Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the third quarter ended September 30, 2021. ?Our third-quarter results were strong, with revenue and profitability exceeding our guidance,? said Chris Diorio, Impinj co-founder a

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 27, 2021 Impinj, Inc.

Three Months Ending

Exhibit 99.1 Impinj Reports Second Quarter 2021 Financial Results SEATTLE, WA, Jul. 28, 2021? Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the second quarter ended June 30, 2021. ?Our second-quarter results were strong, exceeding our revenue and profitability guidance,? said Chris Diorio, Impinj co-founder and CEO.

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37824 IMPINJ, INC.

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 28, 2021 Impinj, Inc.

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A (Amendment No. 1) 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, 2021 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Com

Submission of Matters to a Vote of Security Holders

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, 2021 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Number)

- DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION 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

Three Months Ending

Exhibit 99.1 Impinj Reports First Quarter 2021 Financial Results SEATTLE, WA, Apr. 28, 2021? Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today released its financial results for the first quarter ended March 31, 2021. ?Our first-quarter results were strong, exceeding our revenue and profitability guidance,? said Chris Diorio, Impinj co-founder and CEO. ?

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37824 IMPINJ, INC.

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 28, 2021 Impinj, Inc.

-

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Steve Sanghi Joins Impinj Board of Directors

Exhibit 99.1 Steve Sanghi Joins Impinj Board of Directors SEATTLE, March 22, 2021 – Impinj, Inc. (NASDAQ: PI), a leading RAIN RFID provider and Internet of Things pioneer, today announced that Steve Sanghi has joined its board of directors. “Steve brings a wealth of knowledge as a long-term CEO and chairman of Microchip Technology, Inc., and I’m thrilled he is joining our board,” said Impinj Board

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): March 18, 2021 Impinj, Inc.

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IN THE United States District Court FOR THE DISTRICT OF DELAWARE

Exhibit 99.2 IN THE United States District Court FOR THE DISTRICT OF DELAWARE IN RE IMPINJ, INC. DERIVATIVE LITIGATION, C.A. No.: 18-cv-01686-RGA STIPULATION AND AGREEMENT OF SETTLEMENT This Stipulation and Agreement of Settlement dated July 10, 2020 (the ?Stipulation?), is made and entered into by and among the following Parties (as defined below), each by and through their respective counsel: (i

IN THE United States District Court FOR THE DISTRICT OF DELAWARE

Exhibit 99.3 IN THE United States District Court FOR THE DISTRICT OF DELAWARE IN RE IMPINJ, INC. DERIVATIVE LITIGATION, C.A. No.: 18-cv-01686-RGA NOTICE OF SETTLEMENT TO CURRENT IMPINJ STOCKHOLDERS NOTICE OF PROPOSED SETTLEMENT OF DERIVATIVE ACTION TO: ALL OWNERS OF IMPINJ, INC. (?IMPINJ? OR THE ?COMPANY?) COMMON STOCK (TICKER SYMBOL: PI) AS OF JULY 10, 2020, WHO CONTINUE TO OWN SUCH SHARES THROUG

Financial Statements and Exhibits, Other Events

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 26, 2021 Impinj, Inc.

Impinj Announces Proposed Settlement of Stockholder Derivative Action Lawsuit

Exhibit 99.1 Impinj Announces Proposed Settlement of Stockholder Derivative Action Lawsuit SEATTLE, March 8, 2021 – Impinj, Inc. (NASDAQ: PI), a leading provider and pioneer of RAIN RFID solutions, today announced that on February 26, 2021, the United States District Court for the District of Delaware (the “Court”) issued an order (the “Preliminary Order”) providing for preliminary approval of the

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-37824 IMPINJ, INC. (Exact name of registrant as specified in its c

- S-8

As filed with the Securities and Exchange Commission on February 17, 2021 Registration No.

Description of Impinj, Inc.’s Common Stock

Exhibit 4.1 IMPINJ, INC. DESCRIPTION OF COMMON STOCK The common stock of Impinj, Inc. is listed on the Nasdaq Global Select Market under the symbol ?PI.? All outstanding shares of common stock are validly issued, fully paid, and nonassessable. The following description of the terms of our common stock is not complete and is qualified in its entirety by reference to our certificate of incorporation

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* Impinj, Inc. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) (CUSIP Number) December 31

SC 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* Impinj, Inc. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 453204109 (CUSIP Number) December 31, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which th

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)*

pi13ga1.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Impinj, Inc. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 453204109 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) ¨ Rule 13d-1(b) ý Rule 13d-1(c) ¨ Rule 13d-1(d) *Th

Three Months Ending

Exhibit 99.1 Impinj Reports Fourth Quarter and Full Year 2020 Financial Results SEATTLE, WA, Feb. 10, 2021– Impinj, Inc. (NASDAQ: PI), a leading provider and pioneer of RAIN RFID solutions, today released its financial results for the fourth quarter and year ended December 31, 2020. “Our fourth-quarter results capped a strong close to a turbulent year,” said Chris Diorio, Impinj co-founder and CEO

Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities, Results of Operations and Financial Condition - 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, 2021 Impinj, Inc.

SC 13G/A

us4532041096012921.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 1) IMPINJ INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 453204109 - (CUSIP Number) December 31, 2020 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which t

Impinj Announces Preliminary Fourth-Quarter 2020 Revenue Ahead of Participation at 23rd Annual Needham Virtual Growth Conference

Exhibit 99.1 Impinj Announces Preliminary Fourth-Quarter 2020 Revenue Ahead of Participation at 23rd Annual Needham Virtual Growth Conference SEATTLE, January 11, 2021 – Impinj, Inc. (NASDAQ: PI), a leading provider and pioneer of RAIN RFID solutions, today announced that it expects preliminary fourth quarter 2020 revenue to exceed $36.0 million, above its prior guidance of $26.5 – 28.5 million. T

Financial Statements and Exhibits, Results of Operations and Financial Condition - 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): January 11, 2021 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Numb

Umesh Padval Joins Impinj Board of Directors

EX-99.1 Exhibit 99.1 Umesh Padval Joins Impinj Board of Directors SEATTLE, December 2, 2020 - Impinj, Inc. (NASDAQ: PI), a leading provider and pioneer of RAIN RFID solutions, today announced that Umesh Padval has joined its board of directors. “Umesh brings extensive experience operating high-growth technology companies,” said Impinj Board Chair Peter van Oppen. “These skills, along with board an

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits - 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 30, 2020 Impinj, Inc. (Exact name of registrant as specified in its charter) Delaware 001-37824 91-2041398 (State or other jurisdiction of incorporation) (Commission File Num

License Agreement, dated July 3, 2008, between the registrant and Intel Corporation

CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED.

Amendment No. 5 to Purchase Agreement—Services Phase 2, dated June 12, 2013, between the registrant and Intel Corporation

CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED.

Amendment No. 2 to Purchase Agreement—Services Phase 2, dated April 20, 2011, between the registrant and Intel Corporation

CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED.

Financial Statements and Exhibits, Results of Operations and Financial Condition - 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): October 28, 2020 Impinj, Inc.

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37824 IMPINJ, INC.

Amendment No. 3 to Purchase Agreement—Services Phase 2, dated November 15, 2011, between the registrant and Intel Corporation

CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED.

Amendment No. 1 to Purchase Agreement—Services Phase 2, dated March 26, 2010, between the registrant and Intel Corporation

CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED.

Three Months Ending

Exhibit 99.1 Impinj Reports Third Quarter 2020 Financial Results SEATTLE, WA, Oct. 28, 2020– Impinj, Inc. (NASDAQ: PI), a leading provider and pioneer of RAIN RFID solutions, today released its financial results for the third quarter ended September 30, 2020. “Third-quarter revenue improved sequentially, driven primarily by rebounding retail-apparel volumes that drove endpoint IC sales,” said Chri

Amendment No. 4 to Purchase Agreement—Services Phase 2, dated April 25, 2013, between the registrant and Intel Corporation

CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED.

Purchase Agreement—Services Phase 2, dated December 23, 2009, by and between the registrant and Intel Corporation

CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED.

EX-7

Name of subsidiary with voting and investment power Assenagon Asset Management S.A. Item 3 classification of subsidiary Section 240.13d-1(b)(1)(ii)(J) Non-U.S. institution that is the functional equivalent of an investment adviser under Section 203 of the Investment Advisers Act of 1940 15 U.S.C. 80b-3) or under the laws of any state and that is subject to a regulatory scheme that is substantially

PI / Impinj, Inc. / Assenagon Asset Management S.A. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* IMPINJ INC (Name of Issuer) Common shares (Title of Class of Securities) 453204109 (CUSIP Number) 4 August 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is fil

PI / Impinj, Inc. / Assenagon Asset Management S.A. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* IMPINJ INC (Name of Issuer) Common shares (Title of Class of Securities) 453204109 (CUSIP Number) 3 August 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is file

EX-7

Name of subsidiary with voting and investment power Assenagon Asset Management S.A. Item 3 classification of subsidiary Section 240.13d-1(b)(1)(ii)(J) Non-U.S. institution that is the functional equivalent of an investment adviser under Section 203 of the Investment Advisers Act of 1940 15 U.S.C. 80b-3) or under the laws of any state and that is subject to a regulatory scheme that is substantially

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-37824 IMPINJ, INC.

IMPINJ, INC. CONDENSED CONSOLIDATED BALANCE SHEETS (in thousands, except par value, unaudited)

Exhibit 99.1 Impinj Reports Second Quarter 2020 Financial Results SEATTLE, WA, July 29, 2020– Impinj, Inc. (NASDAQ: PI), a leading provider and pioneer of RAIN RFID solutions, today released its financial results for the second quarter ended June 30, 2020. “Covid-19 negatively impacted our second-quarter results, and the continuing uncertainty tempers our third-quarter outlook,” said Chris Diorio,

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 29, 2020 Impinj, Inc.