DDOG / Datadog, Inc. - SEC-Einreichungen, Jahresbericht, Proxy Statement

First quarter revenue grew 32% year-over-year to $1,006 million Robust growth of larger customers, with about 4,550 $100k+ ARR customers, up from about 3,770 a year ago Launched MCP Server, Bits AI Security Agent, GPU Monitoring, and Experiments for

Exhibit 99.1 Datadog Announces First Quarter 2026 Financial Results May 7, 2026 First quarter revenue grew 32% year-over-year to $1,006 million Robust growth of larger customers, with about 4,550 $100k+ ARR customers, up from about 3,770 a year ago Launched MCP Server, Bits AI Security Agent, GPU Monitoring, and Experiments for general availability NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the leadin

DATADOG, INC. NON-EMPLOYEE DIRECTOR COMPENSATION POLICY ADOPTED: MARCH 16, 2026

Exhibit 10.1 DATADOG, INC. NON-EMPLOYEE DIRECTOR COMPENSATION POLICY ADOPTED: MARCH 16, 2026 Each member of the Board of Directors (the “Board”) of Datadog, Inc. (the “Company”) who is a non-employee director of the Company (each such member, a “Non-Employee Director”) will be eligible to receive the compensation described in this Non-Employee Director Compensation Policy (the “Policy”) for his or

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 7, 2026 Datadog, 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 7, 2026 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Nevada 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number) (I

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 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: 001-39051 Datadog, 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 (Amendment No. )

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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

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Datadog Annual Report 2025UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 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: 001-39051 Datadog, 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 (Amendment No. )

Table of Contents 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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitte

DATADOG, INC. INDEMNIFICATION AGREEMENT

EX-10.1 Exhibit 10.1 DATADOG, INC. INDEMNIFICATION AGREEMENT This INDEMNIFICATION AGREEMENT (this “Agreement”) is dated as of , 20 and is between Datadog, Inc., a Nevada corporation (the “Company”), and (“Indemnitee”). RECITALS A. Indemnitee’s service to the Company substantially benefits the Company. B. Individuals are reluctant to serve as directors or officers of corporations or in certain othe

PLAN OF CONVERSION

EX-2.1 Exhibit 2.1 PLAN OF CONVERSION This Plan of Conversion (this “Plan”) sets forth certain terms of the conversion of Datadog, Inc., a Delaware corporation (the “Delaware Corporation”), to a Nevada corporation (the “Nevada Corporation”), pursuant to the terms of the General Corporation Law of the State of Delaware (as amended, the “DGCL”) and Section 92A.195 of the Nevada Revised Statutes (as

BYLAWS DATADOG, INC. (A NEVADA CORPORATION) ARTICLE I

EX-3.2 Exhibit 3.2 BYLAWS OF DATADOG, INC. (A NEVADA CORPORATION) ARTICLE I OFFICES Section 1. Registered Office. The street address of the corporation’s registered agent is the registered office of the corporation in the State of Nevada. Section 2. Other Offices. The corporation shall also have and maintain a principal executive office at such place as may be fixed by the Board of Directors, 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): April 21, 2026 DATADOG, INC. (Exa

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 21, 2026 DATADOG, INC. (Exact Name of Registrant as Specified in Charter) Nevada 001-39051 27-2825503 (State or other jurisdiction of incorporation) (Commission File Number) (IR

ARTICLES OF INCORPORATION DATADOG, INC. ARTICLE I

EX-3.1 Exhibit 3.1 ARTICLES OF INCORPORATION OF DATADOG, INC. ARTICLE I The name of this corporation is Datadog, Inc. (the “Company”). The Company is the resulting entity in the conversion of Datadog, Inc., a Delaware corporation (the “Delaware Corporation”), into a Nevada corporation and is a continuation of the existence thereof pursuant to Nevada Revised Statutes (as amended from time to time,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 26, 2026 Datadog, Inc. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 26, 2026 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Nu

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 (Amendment No.)

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 (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 1

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 (Amendment No.)

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 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: 001-39051 Datadog, Inc.

List of Subsidiaries of Datadog, Inc.

Exhibit 21.1 List of Subsidiaries of Datadog, Inc. Name Jurisdiction Datadog France SAS France Datadog Ireland Limited Ireland Datadog Cloud Spain SL Spain Datadog Ireland Limited UK Branch United Kingdom Datadog Netherlands BV Netherlands

Fourth quarter revenue grew 29% year-over-year to $953 million Strong growth of larger customers, with 603 $1 million+ ARR customers, up from 462 a year ago Launched Bits AI SRE Agent, Storage Management, Feature Flags, and Data Observability for gen

Exhibit 99.1 Datadog Announces Fourth Quarter and Fiscal Year 2025 Financial Results February 10, 2026 Fourth quarter revenue grew 29% year-over-year to $953 million Strong growth of larger customers, with 603 $1 million+ ARR customers, up from 462 a year ago Launched Bits AI SRE Agent, Storage Management, Feature Flags, and Data Observability for general availability NEW YORK- Datadog, Inc. (NASD

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 (Amendment No.)

PRE 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

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 10, 2026 Datadog, Inc. (

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 10, 2026 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Nu

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 OR ☐ 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: 001-39051 Datadog, Inc.

Third quarter revenue grew 28% year-over-year to $886 million Robust growth of larger customers, with about 4,060 $100k+ ARR customers, up from about 3,490 a year ago Reached a milestone of over 1,000 integrations on the Datadog unified platform

Exhibit 99.1 Datadog Announces Third Quarter 2025 Financial Results November 6, 2025 Third quarter revenue grew 28% year-over-year to $886 million Robust growth of larger customers, with about 4,060 $100k+ ARR customers, up from about 3,490 a year ago Reached a milestone of over 1,000 integrations on the Datadog unified platform NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security pl

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 6, 2025 Datadog, Inc. (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): November 6, 2025 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Num

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144 0001783990 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 OLIVIER POMEL Director Officer Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 32923 5180763.28 323270704 10/07/2025 NASDAQ Common 10/07/2025 Exercise of Stock Options Issuer N 21728 10/07/2025 Cash Common 0

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144 0001784030 XXXXXXXX LIVE 0001561550 DATADOG, INC. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 The Callahan-Thernstrom Family Director Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 91667 13916883.94 323270704 10/06/2025 NASDAQ Common 04/29/2011 Restricted Stock Units Issuer N 91667 04/29/2011 N/A Y

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144 0001783984 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 ALEXIS T. LE-QUOC Director Officer Class A Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 41468 5905043.20 323270704 10/01/2025 NASDAQ Common 10/01/2025 Exercise of Stock Options Issuer N 41468 10/01/2025 Cash N 10b5-1 Sa

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144 0001783990 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 OLIVIER POMEL Director Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 11195 1548828.25 323270704 09/23/2025 NASDAQ Common 07/08/2010 Founders Shares Issuer N 11195 07/08/2010 N/A N 10b5-1 Sales Plan for OLI

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144 0001540517 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 AGARWAL 2018 FAMILY TRUST Director Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 10094 1358551.46 323270704 09/17/2025 NASDAQ Common 04/07/2021 Previously Exercised Stock Options Issuer N 10094 04/07/2021

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144 0001540517 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 AGARWAL 2018 FAMILY TRUST Director Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 44444 6066606.00 323270704 09/15/2025 NASDAQ Common 04/07/2021 Previously Exercised Stock Options Issuer N 44444 04/07/2021

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144 0001783882 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 2019 SHAH FAMILY TRUST Director Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 7916 1101511.40 323270704 09/12/2025 NASDAQ Common 11/06/2012 Fund distribution Affiliates of Index Venture Associates N 7916 1

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144 0001903980 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 SEAN WALTERS Officer Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 6731 936484.03 323270704 09/11/2025 NASDAQ Common 09/01/2025 RSU/PSU Issuer N 6731 09/01/2025 N/A N SEAN MICHAEL WALTERS 620 8th Avenue, 4

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 11, 2025 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File N

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144 0001783990 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 OLIVIER POMEL Director Officer Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 32923 4480161.84 323270704 09/08/2025 NASDAQ Common 09/08/2025 Exercise of Stock Options Issuer N 21728 09/08/2025 Cash Common 0

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144 0001903975 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 KERRY ACOCELLA Officer Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 3958 521585.24 323270704 09/05/2025 NASDAQ Common 09/01/2025 RSU/PSU Issuer N 3958 09/01/2025 N/A N KERRY ACOCELLA 620 8th Avenue, 45th

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144 0001861590 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 ADAM BLITZER Officer Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 7950 1070785.50 323270704 09/03/2025 NASDAQ Common 09/01/2025 RSU/PSU Issuer N 7950 09/01/2025 N/A N ADAM BLITZER 620 8th Avenue, 45th Flo

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144 0001783984 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue 45th Floor New York NY 10018 866-329-4466 Alexis Le-Quoc Officer Director Class A Common Stock Morgan Stanley Smith Barney LLC Executive Services 200 W Civic Center Dr - 4th Floor Sandy UT 84070 13868 1895478.24 323270704 09/02/2025 NASDAQ Class A Common Stock 09/01/2025 Restricted Stock Units and Performance Stock Unit

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144 0001903975 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue 45th Floor New York NY 10018 866-329-4466 Kerry Acocella Officer Class A Common Stock Morgan Stanley Smith Barney LLC Executive Services 200 W Civic Center Dr - 4th Floor Sandy UT 84070 5139 702398.52 323270704 09/02/2025 NASDAQ Class A Common Stock 09/01/2025 Restricted Stock Units and Performance Stock Units vesting I

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144 0001861590 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue 45th Floor New York NY 10018 866-329-4466 Adam Blitzer Officer Class A Common Stock Morgan Stanley Smith Barney LLC Executive Services 200 W Civic Center Dr - 4th Floor Sandy UT 84070 8572 1171620.96 323270704 09/02/2025 NASDAQ Class A Common Stock 09/01/2025 Restricted Stock Units and Performance Stock Units vesting Is

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144 0001120741 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue 45th Floor New York NY 10018 866-329-4466 David Obstler Officer Class A Common Stock Morgan Stanley Smith Barney LLC Executive Services 200 W Civic Center Dr - 4th Floor Sandy UT 84070 12607 1723124.76 323270704 09/02/2025 NASDAQ Class A Common Stock 09/01/2025 Restricted Stock Units and Performance Stock Units vesting

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144 0001903980 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue 45th Floor New York NY 10018 866-329-4466 Sean Michael Walters Officer Class A Common Stock Morgan Stanley Smith Barney LLC Executive Services 200 W Civic Center Dr - 4th Floor Sandy UT 84070 10608 1449901.44 323270704 09/02/2025 NASDAQ Class A Common Stock 09/01/2025 Restricted Stock Units and Performance Stock Units v

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144 0001783984 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 ALEXIS T. LE-QUOC Director Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 41468 5667846.24 323270704 09/02/2025 NASDAQ Common 09/02/2025 Exercise of Stock Options Issuer N 41468 09/02/2025 Cash N 10b5-1 Sal

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144 0001757760 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue 45th Floor New York NY 10018 866-329-4466 David Galloreese Officer Class A Common Stock Morgan Stanley Smith Barney LLC Executive Services 200 W Civic Center Dr - 4th Floor Sandy UT 84070 2573 351677.64 323270704 09/02/2025 NASDAQ Class A Common Stock 09/01/2025 Restricted Stock Units and Performance Stock Units vesting

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144 0001783990 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue 45th Floor New York NY 10018 866-329-4466 Olivier Pomel Officer Director Class A Common Stock Morgan Stanley Smith Barney LLC Executive Services 200 W Civic Center Dr - 4th Floor Sandy UT 84070 15337 2096261.16 323270704 09/02/2025 NASDAQ Class A Common Stock 09/01/2025 Restricted Stock Units and Performance Stock Units

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144 0001783061 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue 45th Floor New York NY 10018 866-329-4466 Yanbing Li Officer Class A Common Stock Morgan Stanley Smith Barney LLC Executive Services 200 W Civic Center Dr - 4th Floor Sandy UT 84070 24982 3414539.76 323270704 09/02/2025 NASDAQ Class A Common Stock 09/01/2025 Restricted Stock Units and Performance Stock Units vesting Iss

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144 0001903975 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 KERRY ACOCELLA Officer Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 12971 1828392.16 323270704 08/29/2025 NASDAQ Common 03/01/2025 RSU/PSU Issuer N 12971 03/01/2025 N/A N KERRY ACOCELLA 620 8th Avenue, 45

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144 0001783990 XXXXXXXX LIVE 0001561550 Datadog, Inc. 001-39051 620 8th Avenue, 45th Floor New York NY 10018 8663294466 OLIVIER POMEL Director Officer Class A Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 11195 1414040.45 323270704 08/27/2025 NASDAQ Common 07/08/2010 Founders Shares Issuer N 11195 07/08/2010 N/A N 10b5-1 Sales Plan

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ 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: 001-39051 Datadog, Inc.

Second quarter revenue grew 28% year-over-year to $827 million Robust growth of larger customers, with about 3,850 $100k+ ARR customers, up from about 3,390 a year ago Unveiled more than 125 products, capabilities and features at DASH 2025

Exhibit 99.1 Datadog Announces Second Quarter 2025 Financial Results August 7, 2025 Second quarter revenue grew 28% year-over-year to $827 million Robust growth of larger customers, with about 3,850 $100k+ ARR customers, up from about 3,390 a year ago Unveiled more than 125 products, capabilities and features at DASH 2025 NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security platform

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 7, 2025 Datadog, Inc. (Exa

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 7, 2025 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Numbe

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Material Modification to Rights of Security Holders, Financial Statements and Exhibits, 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 3, 2025 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number)

Amended and Restated Certificate of Incorporation of Datadog, Inc.

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF DATADOG, INC. The undersigned officer hereby certifies that: ONE: The original date of filing the original Certificate of Incorporation of this company with the Secretary of State of the State of Delaware was June 4, 2010. TWO: Such person is a duly authorized officer of DATADOG, INC., a Delaware corporation. THREE: The Amended and Restated Cert

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ 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: 001-39051 Datadog, Inc.

First quarter revenue grew 25% year-over-year to $762 million Robust growth of larger customers, with about 3,770 $100k+ ARR customers, up from about 3,340 a year ago Announced 2025 DASH user conference, June 10-11, in New York City

Exhibit 99.1 Datadog Announces First Quarter 2025 Financial Results May 6, 2025 First quarter revenue grew 25% year-over-year to $762 million Robust growth of larger customers, with about 3,770 $100k+ ARR customers, up from about 3,340 a year ago Announced 2025 DASH user conference, June 10-11, in New York City NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security platform for cloud a

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 6, 2025 Datadog, 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 6, 2025 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number)

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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 (Amendment No. )

Table of Contents 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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitte

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 (Amendment No. )

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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

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 (Amendment No. )

Table of Contents 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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: x Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitte

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Tables Form S-8 Datadog, Inc. 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 Fees to be Paid   Equity  Class A Common Stock, par value $0.00001 per share, 2019 Equity Incentive Plan

As filed with the Securities and Exchange Commission on March 14, 2025.

As filed with the Securities and Exchange Commission on March 14, 2025. Registration No. 333-    UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Datadog, Inc. (Exact name of Registrant as specified in its charter) Delaware 27-2825503 (State or other jurisdiction of incorporation or organization) (I.R.S. Employ

List of Subsidiaries of Datadog, Inc.

Exhibit 21.1 List of Subsidiaries of Datadog, Inc. Name Jurisdiction Datadog France SAS France Datadog Ireland Limited Ireland Datadog Cloud Spain SL Spain Datadog Ireland Limited UK Branch United Kingdom Datadog Netherlands BV Netherlands

Insider Trading Policy

Exhibit 19.1 DATADOG INSIDER TRADING POLICY Insider trading laws prohibit buying or selling securities of a public company (like Datadog) when possessing “material non-public information” (MNPI)1. To that end, Datadog has adopted this Insider Trading Policy which applies to all employees, officers and directors worldwide of Datadog, Inc. and its subsidiaries as well as anyone living with you (frie

Amended Offer Letter, by and between Datadog, Inc. and Yanbin

Exhibit 10.12 Datadog, Inc. 620 8th Avenue, 45th Floor New York, NY 10018 (866) 329-4466 www.datadoghq.com June 27, 2024 Yanbing Li [Address] Yanbing, Datadog, Inc. (the “Company”) is pleased to offer you employment on the following terms: 1.Position. Your initial title will be Chief Product Officer (CPO), and you will report to the Company’s Chief Executive Officer beginning on August 5, 2024. Th

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 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: 001-39051 Datadog, Inc.

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 13, 2025 Datadog, Inc. (

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 13, 2025 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Nu

Fourth quarter revenue grew 25% year-over-year to $738 million Strong growth of larger customers, with 462 $1 million+ ARR customers, up from 396 a year ago Launched On-Call for general availability

Exhibit 99.1 Datadog Announces Fourth Quarter and Fiscal Year 2024 Financial Results February 13, 2025 Fourth quarter revenue grew 25% year-over-year to $738 million Strong growth of larger customers, with 462 $1 million+ ARR customers, up from 396 a year ago Launched On-Call for general availability NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security platform for cloud applications

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 22, 2024 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Nu

Form of Global Note representing Datadog, Inc.’s 0.00% Convertible Senior Notes due 2029 (included as Exhibit A to the Indenture filed as Exhibit 4.1).

Exhibit 4.1 Execution Version DATADOG, INC. AND U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee INDENTURE Dated as of December 12, 2024 0.00% Convertible Senior Notes due 2029 TABLE OF CONTENTS PAGE ARTICLE 1 DEFINITIONS Section 1.01 . Definitions 1 Section 1.02 . References to Interest 15 ARTICLE 2 ISSUE, DESCRIPTION, EXECUTION, REGISTRATION AND EXCHANGE OF NOTES Section 2.01 . Designat

Datadog Announces Proposed Private Offering of $775 Million of Convertible Senior Notes

Exhibit 99.2 Datadog Announces Proposed Private Offering of $775 Million of Convertible Senior Notes NEW YORK, N.Y. – December 9, 2024 – Datadog, Inc. (Nasdaq: DDOG) (“Datadog”), the monitoring and security platform for cloud applications, today announced that it intends to offer, subject to market conditions and other factors, $775 million aggregate principal amount of Convertible Senior Notes du

Datadog Announces Pricing of Upsized Offering of $870 Million Convertible Senior Notes

Exhibit 99.3 Datadog Announces Pricing of Upsized Offering of $870 Million Convertible Senior Notes NEW YORK, N.Y. – December 9, 2024 – Datadog, Inc. (Nasdaq: DDOG) (“Datadog”), the monitoring and security platform for cloud applications, today announced the pricing of $870 million aggregate principal amount of 0% Convertible Senior Notes due 2029 (the “notes”) in a private placement (the “offerin

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 9, 2024 Datadog, Inc. (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): December 9, 2024 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Num

Early Termination Date

Exhibit 99.1 [DEALER] [ADDRESS] [], 2024 To: [Company] [] [] Re: [Base]1[Additional]2 Call Option Transaction The purpose of this communication (this “Confirmation”) is to set forth the terms and conditions of the call option transaction entered into on the Trade Date specified below (the “Transaction”) between [] (“Dealer”) and Datadog, Inc. (“Counterparty”). This communication constitutes a “Con

DDOG / Datadog, Inc. / Pomel Olivier - SC 13G/A Passive Investment

SC 13G/A 1 d880291dsc13ga.htm SC 13G/A SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Securities) 23804L 103 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropr

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ 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: 001-39051 Datadog, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 7, 2024 Datadog, Inc. (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): November 7, 2024 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Num

Third quarter revenue grew 26% year-over-year to $690 million Robust growth of larger customers, with about 3,490 $100k+ ARR customers, up from about 3,130 a year ago Announced general availability of Datadog Monitoring for Oracle Cloud Infrastructur

Exhibit 99.1 Datadog Announces Third Quarter 2024 Financial Results November 7, 2024 Third quarter revenue grew 26% year-over-year to $690 million Robust growth of larger customers, with about 3,490 $100k+ ARR customers, up from about 3,130 a year ago Announced general availability of Datadog Monitoring for Oracle Cloud Infrastructure NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and secur

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 OR ☐ 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: 001-39051 Datadog, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2024 Datadog, Inc. (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2024 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Numbe

Second quarter revenue grew 27% year-over-year to $645 million Strong growth of larger customers, with about 3,390 $100k+ ARR customers, up from about 2,990 a year ago Announced general availability of LLM Observability Announced innovations for Gene

Exhibit 99.1 Datadog Announces Second Quarter 2024 Financial Results August 8, 2024 Second quarter revenue grew 27% year-over-year to $645 million Strong growth of larger customers, with about 3,390 $100k+ ARR customers, up from about 2,990 a year ago Announced general availability of LLM Observability Announced innovations for Generative AI, Observability, Cloud Security, Product Analytics, Softw

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 5, 2024 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number)

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ 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: 001-39051 Datadog, 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)) ☐ Defin

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 7, 2024 Datadog, 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 7, 2024 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number)

First quarter revenue grew 27% year-over-year to $611 million Strong growth of larger customers, with about 3,340 $100k+ ARR customers, up from about 2,910 a year ago Announced general availability of Bits AI for Incident Management, Event Management

Exhibit 99.1 Datadog Announces First Quarter 2024 Financial Results May 7, 2024 First quarter revenue grew 27% year-over-year to $611 million Strong growth of larger customers, with about 3,340 $100k+ ARR customers, up from about 2,910 a year ago Announced general availability of Bits AI for Incident Management, Event Management, Error Tracking for Logs, and Mobile App Testing NEW YORK- Datadog, I

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 (Amendment No. )

Table of Contents 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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitte

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 (Amendment No. )

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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

ARS

Datadog Annual Report 2022 Datadog Annual Report 2023 Datadog Annual Report 2023UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 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: 001-39051 Datadog, Inc.

Policy Relating to Recovery of Erroneously Awarded Compensation

Datadog, Inc. Incentive Compensation Recoupment Policy 1.Introduction The Board of Directors (the “Board”) of Datadog, Inc., a Delaware corporation (the “Company”), has determined that it is in the best interests of the Company and its stockholders to adopt this Incentive Compensation Recoupment Policy (this “Policy”) providing for the Company’s recoupment of Recoverable Incentive Compensation tha

List of Subsidiaries of Datadog, Inc.

Exhibit 21.1 List of Subsidiaries of Datadog, Inc. Name Jurisdiction Datadog France SAS France Datadog Ireland Limited Ireland Datadog Cloud Spain SL Spain Datadog Ireland Limited UK Branch United Kingdom Datadog Netherlands BV Netherlands

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 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: 001-39051 Datadog, Inc.

DDOG / Datadog, Inc. / ICONIQ STRATEGIC PARTNERS II, L.P. - SC 13G/A Passive Investment

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 4)* Datadog, Inc. (Name of Issuer) CLASS A COMMON STOCK, $0.00001 PAR VALUE PER SHARE (Title of Class of Securities) 23804L103 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desi

DDOG / Datadog, Inc. / Pomel Olivier - SC 13G/A Passive Investment

SC 13G/A SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT Each of the undersigned, pursuant to Rule 13d-1(k)(1) under the Act, hereby agrees and acknowledges that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of the Class A Common Stock and the information required by this Schedule 13G, to which this Agreement is att

Fourth quarter revenue grew 26% year-over-year to $590 million Strong growth of larger customers, with 396 $1 million+ ARR customers, up from 317 a year ago

Exhibit 99.1 Datadog Announces Fourth Quarter and Fiscal Year 2023 Financial Results February 13, 2024 Fourth quarter revenue grew 26% year-over-year to $590 million Strong growth of larger customers, with 396 $1 million+ ARR customers, up from 317 a year ago NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security platform for cloud applications, today announced financial results for it

DDOG / Datadog, 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.: 3)* Name of issuer: Datadog Inc Class A Title of Class of Securities: Common Stock CUSIP Number: 23804L103 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒

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 13, 2024 Datadog, Inc. (

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 13, 2024 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Nu

DDOG / Datadog, Inc. / BlackRock Inc. Passive Investment

SC 13G/A 1 us23804l1035012924.txt us23804l1035012924.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 1) Datadog, Inc. - (Name of Issuer) Class A Common Stock - (Title of Class of Securities) 23804L103 - (CUSIP Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropriate

LETTER

United States securities and exchange commission logo December 21, 2023 David Obstler Chief Financial Officer Datadog, Inc.

*FOIA Confidential Treatment Request* Confidential Treatment Requested by Datadog, Inc. in connection with comments relating to the Company’s Form 10-K filed on February 24, 2023, Form 10-Q filed November 7, 2023 and Form 8-K furnished November 7, 20

*FOIA Confidential Treatment Request* Confidential Treatment Requested by Datadog, Inc.

Cooley LLP 55 Hudson Yards New York, NY 10001-2157 t: +1 212 479 6000 f: +1 212 479 6275 cooley.com

Brad Goldberg T: +1 212 479 6780 [email protected] November 17, 2023 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Technology 100 F Street, N.E. Washington, D.C. 20549 Re: Datadog, Inc. Form 10-K for the Year Ended December 31, 2022 Filed February 24, 2023 Form 10-Q for the Quarter Ended September 30, 2023 Filed November 7, 2023 Form 8-K Fu

LETTER

United States securities and exchange commission logo November 9, 2023 David Obstler Chief Financial Officer Datadog, Inc.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 7, 2023 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Num

Third quarter revenue grew 25% year-over-year to $548 million Strong growth of larger customers, with about 3,130 $100k+ ARR customers, up from about 2,600 a year ago

Exhibit 99.1 Datadog Announces Third Quarter 2023 Financial Results November 7, 2023 Third quarter revenue grew 25% year-over-year to $548 million Strong growth of larger customers, with about 3,130 $100k+ ARR customers, up from about 2,600 a year ago NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security platform for cloud applications, today announced financial results for its third

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ 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: 001-39051 Datadog, Inc.

*FOIA Confidential Treatment Request* Confidential Treatment Requested by Datadog, Inc. in connection with comments relating to the Company’s Form 10-K filed on February 24, 2023, Form 10-Q filed August 9, 2023 and Form 8-K furnished August 8, 2023 J

*FOIA Confidential Treatment Request* Confidential Treatment Requested by Datadog, Inc.

Cooley LLP 1299 Pennsylvania Ave Suite 700 Washington, DC 20004-2400 t: +1 202 842 7800 f: +1 202 842 7899 cooley.com

Katherine Denby T: +1 202 776 2070 [email protected] September 29, 2023 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Technology 100 F Street, N.E. Washington, D.C. 20549 Attn: Kathleen Collins David Edgar Re: Datadog, Inc. Form 10-K for the Year Ended December 31, 2022 Filed February 24, 2023 Form 10-Q for the Quarter Ended June 30, 2023 File

LETTER

United States securities and exchange commission logo September 28, 2023 David Obstler Chief Financial Officer Datadog, Inc.

Amended and Restated Bylaws of Datadog, Inc.

AMENDED AND RESTATED BYLAWS OF DATADOG, INC. (A DELAWARE CORPORATION) ARTICLE I OFFICES Section 1.Registered Office. The registered office of the corporation in the State of Delaware shall be as set forth in the Certificate of Incorporation. Section 2.Other Offices. The corporation shall also have and maintain an office or principal place of business at such place as may be fixed by the Board of D

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ 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: 001-39051 Datadog, Inc.

Amended and Restated Non-Employee Director Compensation Policy.

DATADOG, INC. NON-EMPLOYEE DIRECTOR COMPENSATION POLICY ADOPTED: May 9, 2023 Each member of the Board of Directors (the “Board”) of Datadog, Inc. (the “Company”) who is a non-employee director of the Company (each such member, a “Non-Employee Director”) will be eligible to receive the compensation described in this Non-Employee Director Compensation Policy (the “Policy”) for his or her Board servi

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2023 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Numbe

Second quarter revenue grew 25% year-over-year to $509 million Strong growth of larger customers, with about 2,990 $100k+ ARR customers, up from about 2,420 a year ago Announced innovations for Generative AI, Observability, Security, Developer Experi

Exhibit 99.1 Datadog Announces Second Quarter 2023 Financial Results August 8, 2023 Second quarter revenue grew 25% year-over-year to $509 million Strong growth of larger customers, with about 2,990 $100k+ ARR customers, up from about 2,420 a year ago Announced innovations for Generative AI, Observability, Security, Developer Experience, and Cost Management at DASH 2023 Named a Leader in the 2023

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 Datadog, 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 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (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 (Amendment No. )

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 (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)

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ 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: 001-39051 Datadog, Inc.

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 4, 2023 Datadog, 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 4, 2023 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number)

First quarter revenue grew 33% year-over-year to $482 million Strong growth of larger customers, with about 2,910 $100k+ ARR customers, up from about 2,250 a year ago Launched Data Streams Monitoring and Application Vulnerability Management

Exhibit 99.1 Datadog Announces First Quarter 2023 Financial Results May 4, 2023 First quarter revenue grew 33% year-over-year to $482 million Strong growth of larger customers, with about 2,910 $100k+ ARR customers, up from about 2,250 a year ago Launched Data Streams Monitoring and Application Vulnerability Management NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security platform for

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 (Amendment No. )

Table of Contents 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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitte

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 (Amendment No. )

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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

ARS

Datadog Annual Report 2022UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39051 Datadog, Inc.

DDOG / Datadog Inc - Class A / MORGAN STANLEY - MS AMENDMENT Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.2)* Datadog, Inc. - (Name of Issuer) Class A Common Stock - (Title of Class of Securities) 23804L103 - (CUSIP Number) March 31, 2023 - (Date Of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which th

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Tables Form S-8 Datadog, Inc. 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 Fees to be Paid Equity Class A Common Stock, par value $0.00001 per share, 2019 Equity Incentive Plan Other

Power of Attorney (included on the signature page of this Form S-8).

S-8 As filed with the Securities and Exchange Commission on March 3, 2023. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Datadog, Inc. (Exact name of Registrant as specified in its charter) Delaware 27-2825503 (State or other jurisdiction of incorporation or organization) (I.R.S. Employ

Amended Offer Letter, by and between Datadog, Inc. and Sean Walters, dated January 5, 2022

Exhibit 10.12 Datadog, Inc. 620 8th Avenue, 45th Floor New York, NY 10018 (866) 329-4466 www.datadoghq.com January 5, 2022 Sean Walters [email protected] Sean, Datadog, Inc. (the “Company”) is pleased to update the original terms of your employment set forth in the letter agreement dated February 9, 2018 (the “Original Offer Letter”) as follows: 1.Position. Your title will be Chief Revenue Officer an

List of Subsidiaries of Datadog, Inc.

Exhibit 21.1 List of Subsidiaries of Datadog, Inc. Name Jurisdiction Datadog France SAS France Datadog Ireland Limited Ireland Datadog Cloud Spain SL Spain Datadog Ireland Limited UK Branch United Kingdom Datadog Netherlands BV Netherlands

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39051 Datadog, Inc.

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 16, 2023 Datadog, Inc. (

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 16, 2023 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Nu

Fourth quarter revenue grew 44% year-over-year to $469 million Strong growth of larger customers, with 317 $1 million+ ARR customers, up from 216 a year ago Launched Universal Service Monitoring

Exhibit 99.1 Datadog Announces Fourth Quarter and Fiscal Year 2022 Financial Results February 16, 2023 Fourth quarter revenue grew 44% year-over-year to $469 million Strong growth of larger customers, with 317 $1 million+ ARR customers, up from 216 a year ago Launched Universal Service Monitoring NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the observability and security platform for cloud applications,

DDOG / Datadog, Inc. Class A / Pomel Olivier - SC 13G/A Passive Investment

SC 13G/A 1 d443443dsc13ga.htm SC 13G/A SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Securities) 23804L 103 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropri

DDOG / Datadog, Inc. Class A / Le-Quoc Alexis - SC 13G/A Passive Investment

SC 13G/A 1 d409291dsc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 3)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Securities) 23804L 103 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Chec

DDOG / Datadog, Inc. Class A / ICONIQ STRATEGIC PARTNERS II, L.P. - SC 13G/A Passive Investment

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 3)* Datadog, Inc. (Name of Issuer) CLASS A COMMON STOCK, $0.00001 PAR VALUE PER SHARE (Title of Class of Securities) 23804L103 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desi

DDOG / Datadog, Inc. Class A / PRICE T ROWE ASSOCIATES INC /MD/ Passive Investment

SC 13G/A 1 ddog13gadec22.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 9) DATADOG INC - CLASS A (Name of Issuer) COMMON STOCK (Title of Class of Securities) 23804L103 (CUSIP NUMBER) December 31, 2022 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule p

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT Each of the undersigned, pursuant to Rule 13d-1(k)(1) under the Act, hereby agrees and acknowledges that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of the Class A Common Stock and the information required by this Schedule 13G, to which this Agreement is att

DDOG / Datadog, Inc. Class A / Enfield Investments Holdings Ltd - SC 13G/A Passive Investment

SC 13G/A 1 tm236314d1sc13ga.htm SC 13G/A Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) 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 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 3)* Datadog, Inc. (Name of Issuer) Class A Common Stock (Title of Class of S

DDOG / Datadog, Inc. Class A / MORGAN STANLEY - MS AMENDMENT Passive Investment

SC 13G/A 1 DatadogDDOG.txt MS AMENDMENT UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.1)* Datadog, Inc. - (Name of Issuer) Class A Common Stock - (Title of Class of Securities) 23804L103 - (CUSIP Number) December 30, 2022 - (Date Of Event which Requires Filing of this Statement) Check the appropriate box

DDOG / Datadog, Inc. Class A / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0710-datadogincclassa.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: Datadog Inc. Class A Title of Class of Securities: Common Stock CUSIP Number: 23804L103 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designa

DDOG / Datadog, Inc. Class A / BlackRock Inc. Passive Investment

us23804l1035020323.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: ) Datadog, Inc. - (Name of Issuer) Class A Common Stock - (Title of Class of Securities) 23804L103 - (CUSIP Number) December 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39051 Datadog, Inc.

Third quarter revenue grew 61% year-over-year to $437 million Strong growth of larger customers, with about 2,600 $100k+ ARR customers, up from about 1,800 a year ago Announced 18 new products and features at Dash

Exhibit 99.1 Datadog Announces Third Quarter 2022 Financial Results November 3, 2022 Third quarter revenue grew 61% year-over-year to $437 million Strong growth of larger customers, with about 2,600 $100k+ ARR customers, up from about 1,800 a year ago Announced 18 new products and features at Dash NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security platform for cloud applications, 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): November 3, 2022 Datadog, Inc. (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): November 3, 2022 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Num

DDOG / Datadog, Inc. Class A / BlackRock Inc. Passive Investment

us23804l1035090722.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: ) Datadog, Inc. - (Name of Issuer) Class A Common Stock - (Title of Class of Securities) 23804L103 - (CUSIP Number) August 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to

Lease, by and between Datadog, Inc. and FC Eighth Ave., LLC, dated July 28,2022.

Certain information has been excluded from this agreement (indicated by ?[***]?) because such information is both not material and the type that the registrant customarily and actually treats as private or confidential.

Performance Stock Units (PSU) Grant Notice and Award Agreement

Datadog, Inc. PSU Award Grant Notice (2019 Equity Incentive Plan) Datadog, Inc. (the ?Company?) has awarded to you (the ?Participant?) the number of performance restricted stock units specified and on the terms set forth below in consideration of your services (the ?PSU Award?). Your PSU Award is subject to all of the terms and conditions as set forth herein and in the Company?s 2019 Equity Incent

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39051 Datadog, Inc.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2022 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Numbe

Second quarter revenue grew 74% year-over-year to $406 million Strong growth of larger customers, with about 2,420 $100k+ ARR customers, up from 1,570 a year ago Launched Observability Pipelines product

Exhibit 99.1 Datadog Announces Second Quarter 2022 Financial Results August 4, 2022 Second quarter revenue grew 74% year-over-year to $406 million Strong growth of larger customers, with about 2,420 $100k+ ARR customers, up from 1,570 a year ago Launched Observability Pipelines product NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security platform for cloud applications, today announc

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 2, 2022 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number)

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39051 Datadog, Inc.

Offer Letter, by and between Datadog, Inc. and Adam Blitzer, dated April 23, 2021.

Exhibit 10.1 Datadog, Inc. 620 8th Avenue, 45th Floor New York, NY 10018 (866) 329-4466 www.datadoghq.com April 23, 2021 Adam Blitzer [email protected] Adam, Datadog, Inc. (the ?Company?) is pleased to offer you employment on the following terms: 1.Position. Your initial title will be Chief Operating Officer and you will initially report to the Company?s Chief Executive Officer beginning on M

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2022 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number)

First quarter revenue grew 83% year-over-year to $363 million Strong growth of larger customers, with about 2,250 $100k+ ARR customers, up from 1,406 a year ago Launched Application Security Monitoring product

Exhibit 99.1 Datadog Announces First Quarter 2022 Financial Results May 5, 2022 First quarter revenue grew 83% year-over-year to $363 million Strong growth of larger customers, with about 2,250 $100k+ ARR customers, up from 1,406 a year ago Launched Application Security Monitoring product NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security platform for cloud applications, today anno

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 (Amendment No. )

Table of Contents 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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitte

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 (Amendment No. )

DEFA14A 1 datadognoticefy2021.htm 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 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Comm

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 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: 001-39051 Datadog, Inc.

List of Subsidiaries of Datadog, Inc.

Exhibit 21.1 List of Subsidiaries of Datadog, Inc. Name Jurisdiction Datadog France SAS France Datadog Holding Limited Ireland Datadog Germany GmbH Germany Datadog Ireland Limited Ireland Datadog Japan GK Japan DDog Singapore PTE. LTD. Singapore Datadog Ireland Limited Australia Branch Australia Datadog Ireland Limited UK Branch United Kingdom Datadog Netherlands BV Netherlands Datadog Services Ca

DDOG / Datadog, Inc. Class A / PRICE T ROWE ASSOCIATES INC /MD/ Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 8) Datadog, Inc. (Name of Issuer) COMMON STOCK (Title of Class of Securities) 23804L103 (CUSIP NUMBER) December 31, 2021 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule pursuant to which this Schedule is fil

DDOG / Datadog, Inc. Class A / ICONIQ STRATEGIC PARTNERS II, L.P. - SC 13G/A Passive Investment

CUSIP No. 23804L103 SCHEDULE 13G Page 1 of 25 Pages UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 2)* Datadog, Inc. (Name of Issuer) CLASS A COMMON STOCK, $0.00001 PAR VALUE PER SHARE (Title of Class of Securities) 23804L103 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this S

JOINT FILING AGREEMENT

CUSIP No. 23804L103 SCHEDULE 13G Page 14 of 15 Pages EXHIBIT 99.1 JOINT FILING AGREEMENT Each of the undersigned, pursuant to Rule 13d-1(k)(1) under the Act, hereby agrees and acknowledges that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of the Class A Common Stock and the information required by this

JOINT FILING AGREEMENT

EXHIBIT 99.1 JOINT FILING AGREEMENT Each of the undersigned, pursuant to Rule 13d-1(k)(1) under the Act, hereby agrees and acknowledges that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of the Class A Common Stock and the information required by this Schedule 13G, to which this Agreement is attached as

DDOG / Datadog, Inc. Class A / Index Ventures VI (Jersey) LP - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 2)* Datadog, Inc. (Name of Issuer) CLASS A COMMON STOCK, $0.00001 PAR VALUE PER SHARE (Title of Class of Securities) 23804L103 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the

DDOG / Datadog, Inc. Class A / MORGAN STANLEY - MS INITIAL Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.)* Datadog, Inc. - (Name of Issuer) Class A Common Stock - (Title of Class of Securities) 23804L103 - (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

DDOG / Datadog, Inc. Class A / Enfield Investments Holdings Ltd - 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 ? 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to ? 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 2)* Datadog, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 23804L103 (CUSIP Number) December 31,

DDOG / Datadog, Inc. Class A / Le-Quoc Alexis - SC 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

DDOG / Datadog, Inc. Class A / Pomel Olivier - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 10, 2022 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Nu

Fourth quarter revenue grew 84% year-over-year to $326 million Strong growth of larger customers, with 216 $1 million+ ARR customers, up from 101 a year ago Achieved FedRAMP moderate-impact authorization Launched Sensitive Data Scanner

Exhibit 99.1 Datadog Announces Fourth Quarter and Fiscal Year 2021 Financial Results February 10, 2022 Fourth quarter revenue grew 84% year-over-year to $326 million Strong growth of larger customers, with 216 $1 million+ ARR customers, up from 101 a year ago Achieved FedRAMP moderate-impact authorization Launched Sensitive Data Scanner NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and sec

DDOG / Datadog, Inc. Class A / 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: Datadog Inc. Class A Title of Class of Securities: Common Stock CUSIP Number: 23804L103 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

DDOG / Datadog, Inc. Class A / BlackRock Inc. Passive Investment

us23804l1035020422.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: ) Datadog, Inc. - (Name of Issuer) Class A Common Stock - (Title of Class of Securities) 23804L103 - (CUSIP Number) December 31, 2021 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

Amended and Restated Non-Employee Director Compensation Policy.

Exhibit 10.1 DATADOG, INC. NON-EMPLOYEE DIRECTOR COMPENSATION POLICY AMENDED AND RESTATED AS OF MAY 13, 2021 Each member of the Board of Directors (the ?Board?) of Datadog, Inc. (the ?Company?) who is a non-employee director of the Company (each such member, a ?Non-Employee Director?) will be eligible to receive the compensation described in this Amended and Restated Non-Employee Director Compensa

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 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: 001-39051 Datadog, Inc.

Third quarter revenue grew 75% year-over-year to $270 million Strong growth of larger customers, with 1,800 $100k+ ARR customers, up from 1,082 a year ago Announced ten new products and features at Dash

Exhibit 99.1 Datadog Announces Third Quarter 2021 Financial Results November 4, 2021 Third quarter revenue grew 75% year-over-year to $270 million Strong growth of larger customers, with 1,800 $100k+ ARR customers, up from 1,082 a year ago Announced ten new products and features at Dash NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monitoring and security platform for cloud applications, today announ

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2021 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Num

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 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: 001-39051 Datadog, Inc.

Second quarter revenue grew 67% year-over-year to $234 million Strong growth of larger customers, with 1,610 $100k+ ARR customers, up from 1,015 a year ago Launched general availability of Cloud Security Posture Management and Cloud Workload Security

Exhibit 99.1 Datadog Announces Second Quarter 2021 Financial Results August 5, 2021 Second quarter revenue grew 67% year-over-year to $234 million Strong growth of larger customers, with 1,610 $100k+ ARR customers, up from 1,015 a year ago Launched general availability of Cloud Security Posture Management and Cloud Workload Security products Announced beta of CI Visibility product NEW YORK- Datado

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 5, 2021 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Numbe

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 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number

Offer Letter, by and between Datadog, Inc. and Amit Agarwal, dated May 4, 2012.

Exhibit 10.2 http://www.datadoghq.com 1140 Broadway, Suite 501 New York, NY 10001 May 4, 2012 Attn: Amit Agarwal [home address] Dear Amit: Datadog, Inc. (the ?Company?) is pleased to offer you employment on the following terms: 1.Position. Your initial title will be Vice President of Product, and you will initially report to the Company?s CEO. This is a full-time position. While you render service

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 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: 001-39051 Datadog, Inc.

Offer Letter, by and between Datadog, Inc. and Dan Fougere, dated December 18, 2016

Exhibit 10.3 Datadog, Inc. 620 8th Ave, 45th Fl New York, NY 10018 www.datadoghq.com December 18, 2016 Mr. Dan Fougere Dear Dan: Datadog, Inc. (the ?Company?) is pleased to offer you a consulting services relationship, and subsequent full-time employment, on the terms set forth in this letter agreement (this ?Agreement?): 1.Consulting. You will provide financial and business consulting and advisor

Offer Letter, by and between Datadog, Inc. and Alexis Lê-Quôc, dated May 20, 2011.

Exhibit 10.1 Datadog, Inc. May 20, 2011 Alexis Le-Quoc [home address] Dear Alexis: Datadog, Inc. (the ?Company?) is pleased to offer you employment on the following terms: 1.Position. Your initial title will be Chief Product Officer, and you will initially report to the Company?s Chief Executive Officer. This is a full-time position. While you render services to the Company, you will not engage in

First quarter revenue grew 51% year-over-year to $199 million Strong growth of larger customers, with 1,437 $100k+ ARR customers, up from 960 a year ago Closed on acquisitions of Sqreen and Timber Named a Leader in the 2021 Gartner Magic Quadrant for

Exhibit 99.1 Datadog Announces First Quarter Results May 6, 2021 First quarter revenue grew 51% year-over-year to $199 million Strong growth of larger customers, with 1,437 $100k+ ARR customers, up from 960 a year ago Closed on acquisitions of Sqreen and Timber Named a Leader in the 2021 Gartner Magic Quadrant for Application Performance Monitoring NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monito

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2021 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number)

- DEFA14A

DEFA14A 1 d161172ddefa14a.htm 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 (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 Commissi

- DEF 14A

Table of Contents 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 (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 permitte

- S-8

As filed with the Securities and Exchange Commission on March 12, 2021. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Datadog, Inc. (Exact name of registrant as specified in its charter) Delaware 27-2825503 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 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: 001-39051 Datadog, Inc.

List of Significant Subsidiaries of Datadog, Inc.

Exhibit 21.1 Significant Subsidiaries of Datadog, Inc. Name Jurisdiction Datadog France SAS France Datadog Holding Limited Ireland Datadog Germany GmbH Germany Datadog Ireland Limited Ireland Datadog Japan GK Japan DDog Singapore PTE. LTD. Singapore Datadog Ireland Limited Australia Branch Australia Datadog Ireland Limited UK Branch United Kingdom Datadog Netherlands BV Netherlands Datadog Service

Agreement of Sublease, by and between Datadog, Inc. and Clearbridge Investments, LLC, dated July 9, 2020

Exhibit 10.14 AGREEMENT OF SUBLEASE Between CLEARBRIDGE INVESTMENTS, LLC, as Sublandlord and DATADOG, INC., as Subtenant Dated as of July 9, 2020 Subleased Premises: 49th Floor 620 Eighth Avenue New York, New York Table of Contents Page 1. Subleasing of the Subleased Premises - 1 - 2. Term - 1 - 3. Rent and Other Charges - 3 - 4. Use - 6 - 5. Covenants with Respect to the Lease - 6 - 6. Subordinat

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Sec

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Securities) 23804L103 (CUSIP Number) Whale Rock Capital Management LLC 2 International Place, 24th Floor Boston, MA 02110 (617) 502-9909 (Na

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT Each of the undersigned, pursuant to Rule 13d-1(k)(1) under the Act, hereby agrees and acknowledges that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of the Class A Common Stock and the information required by this Schedule 13G, to which this Agreement is att

SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7) Datadog, Inc. (Name of Issuer) COMMON STOCK (Title of Class of Securities) 23804L103 (CUSIP NUMBER) December 31, 2020 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule pursuant to which this Schedule is fil

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Securities) 23804L

SC 13G/A SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Securities) 23804L

SC 13G/A SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Datadog, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Securities) 23804L

SC 13G/A SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) 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 UNDER THE

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) 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 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 23804L103 (CUSIP Number)

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b) (Amendment No. 1) * Datadog, Inc. (Name

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b) (Amendment No. 1) * Datadog, Inc. (Name of Issuer) Class A Common Stock, par value $0.00001 (Title of Class of Securities) 23804L103 (CUSIP Number) December 31, 2020 (Date of Event Which Req

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) Class A common stock, par value $0.00001 per share (Title of Class of Sec

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) Class A common stock, par value $0.00001 per share (Title of Class of Securities) 23804L103 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) CLASS A COMMON STOCK, $0.00001 PAR VALUE PER SHARE (Title of Class of Sec

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) CLASS A COMMON STOCK, $0.00001 PAR VALUE PER SHARE (Title of Class of Securities) 23804L103 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desi

JOINT FILING AGREEMENT

EX-99 2 a21-65751ex99.htm EX-99 Exhibit 99 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that they are jointly filing this statement on Schedule 13G. Each of them is responsible for the timely filing of such statement and any amendments thereto, and for the completeness and accuracy of the

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Sec

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Securities) 23804L103 (CUSIP Number) Whale Rock Capital Management LLC 2 International Place, 24th Floor Boston, MA 02110 (617) 502-9909 (Na

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) CLASS A COMMON STOCK, $0.00001 PAR VALUE PER SHARE (Title of Class of Sec

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) CLASS A COMMON STOCK, $0.00001 PAR VALUE PER SHARE (Title of Class of Securities) 23804L103 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desi

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT Each of the undersigned, pursuant to Rule 13d-1(k)(1) under the Act, hereby agrees and acknowledges that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of the Class A Common Stock and the information required by this Schedule 13G, to which this Agreement is att

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Amendment No. 2) Under the Securities Exchange Act of 1934 Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Secu

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Amendment No. 2) Under the Securities Exchange Act of 1934 Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Securities) 23804L103 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desig

Joint Filing Agreement dated February 11, 2021 among the Reporting Persons

EX-99.1 EXHIBIT 99.1 Joint Filing Agreement In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, each of the undersigned hereby agrees to the joint filing, along with all other such undersigned, on behalf of the Reporting Persons (as defined in the joint filing), of a statement on Schedule 13G (including amendments thereto) with respect to the common stock, pa

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): February 11, 2021 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Nu

Fourth quarter revenue grew 56% year-over-year to $178 million Strong growth of larger customers, with 97 $1 million+ ARR customers, up from 50 a year ago Announced an agreement to acquire Sqreen, a SaaS based security platform, and the acquisition o

Exhibit 99.1 Datadog Announces Fourth Quarter and Full Year 2020 Results February 11, 2021 Fourth quarter revenue grew 56% year-over-year to $178 million Strong growth of larger customers, with 97 $1 million+ ARR customers, up from 50 a year ago Announced an agreement to acquire Sqreen, a SaaS based security platform, and the acquisition of Timber Technologies, the makers of an observability data

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value (Title of Class of Securities) (

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value (Title of Class of Securities) 23804L103 (CUSIP Number) December 31, 2020 Date of Event Which Requires Filing of the Statement Check the appropriate box to designate the rul

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Datadog Inc. Class A Title of Class of Securities: Common Stock CUSIP Number: 23804L103 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 13d-1(b) ☐ Ru

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Sec

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Datadog, Inc. (Name of Issuer) Class A Common Stock, $0.00001 par value per share (Title of Class of Securities) Class A Common Stock: 23804L103 (CUSIP Number) Contour Venture Partners LP 475 Park Avenue South, 6th Floor New York, NY 10016 (212)

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 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: 001-39051 Datadog, Inc.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 10, 2020 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Nu

Third quarter revenue grew 61% year-over-year to $155 million Strong growth of larger customers, with 1,107 $100k+ ARR customers, up from 727 a year ago Announced 8 new products and features at annual Dash conference Announced a strategic partnership

Exhibit 99.1 Datadog Announces Third Quarter Results November 10, 2020 Third quarter revenue grew 61% year-over-year to $155 million Strong growth of larger customers, with 1,107 $100k+ ARR customers, up from 727 a year ago Announced 8 new products and features at annual Dash conference Announced a strategic partnership with Microsoft and an extended partnership with Google NEW YORK- Datadog, Inc.

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 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: 001-39051 Datadog, Inc.

Second quarter revenue grew 68% year-over-year to $140 million Strong growth of larger customers, with 1,015 $100k+ ARR customers, up from 594 a year ago Achieved FedRAMP authorization for low-impact SaaS Acquired Undefined Labs to provide visibility

Exhibit 99.1 Datadog Announces Second Quarter Results August 6, 2020 Second quarter revenue grew 68% year-over-year to $140 million Strong growth of larger customers, with 1,015 $100k+ ARR customers, up from 594 a year ago Achieved FedRAMP authorization for low-impact SaaS Acquired Undefined Labs to provide visibility early in the development cycle NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monito

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2020 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Numbe

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United States securities and exchange commission logo June 17, 2020 David Obstler Chief Financial Officer Datadog, Inc.

LETTER

United States securities and exchange commission logo June 17, 2020 David Obstler Chief Financial Officer Datadog, Inc.

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CORRESP *FOIA Confidential Treatment Request* Confidential Treatment Requested by Datadog, Inc.

Submission of Matters to a Vote of Security Holders

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 11, 2020 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Nu

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United States securities and exchange commission logo June 5, 2020 David Obstler Chief Financial Officer Datadog, Inc.

LETTER

United States securities and exchange commission logo June 5, 2020 David Obstler Chief Financial Officer Datadog, Inc.

Indenture, dated June 2, 2020, between Datadog, Inc. and U.S. Bank National Association, as Trustee.

EX-4.1 Exhibit 4.1 EXECUTION VERSION DATADOG, INC. AND U.S. BANK NATIONAL ASSOCIATION, as Trustee INDENTURE Dated as of June 2, 2020 0.125% Convertible Senior Notes due 2025 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 Amou

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

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 28, 2020 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Num

Form of Confirmation for Capped Call Transaction.

EX-10.1 Exhibit 10.1 [Dealer name and address] To: Datadog, Inc. 620 Eighth Avenue, 45th Floor New York, NY 10018 From: [Dealer] Re: [Base][Additional] Capped Call Transaction Date: [ ], 2020 Dear Ladies and Gentlemen: The purpose of this communication (this “Confirmation”) is to set forth the terms and conditions of the above-referenced transaction entered into on the Trade Date specified below (

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CORRESP Nicole C. Brookshire +1 (857) 241-0211 [email protected] Via EDGAR and Overnight Courier May 21, 2020 U.S. Securities and Exchange Commission Division of Corporation Finance Office of Information Technology 100 F Street, N.E. Washington, D.C. 20549 Attention: Kathleen Collins, Accounting Branch Chief Eiko Yaoita Pyles, Staff Accountant Jan Woo, Legal Branch Chief Re: Datadog, Inc. For

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CORRESP May 15, 2020 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Information Technology 100 F Street, N.E. Washington, D.C. 20549 Attention: Kathleen Collins, Accounting Branch Chief Eiko Yaoita Pyles, Staff Accountant Re: Datadog, Inc. Form 10-K for the Fiscal Year Ended December 31, 2019 Filed February 25, 2020 File No. 001-39051 Ladies and Gentlem

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 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: 001-39051 Datadog, Inc.

First quarter revenue grew 87% year-over-year to $131 million Strong growth of larger customers, with 960 $100k+ ARR customers versus 508 a year ago Launched Security Monitoring to break down the silos between security, dev, and ops Surpassed 400 out

Exhibit 99.1 Datadog Announces First Quarter Results May 11, 2020 First quarter revenue grew 87% year-over-year to $131 million Strong growth of larger customers, with 960 $100k+ ARR customers versus 508 a year ago Launched Security Monitoring to break down the silos between security, dev, and ops Surpassed 400 out-of-the-box supported integrations NEW YORK- Datadog, Inc. (NASDAQ:DDOG), the monito

23804L103 / Datadog Inc / PRICE T ROWE ASSOCIATES INC /MD/ Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6) Datadog, Inc. (Name of Issuer) COMMON STOCK (Title of Class of Securities) 23804L103 (CUSIP NUMBER) April 30, 2020 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule pursuant to which this Schedule is filed:

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 11, 2020 Datadog, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-39051 27-2825503 (State or Other Jurisdiction of Incorporation) (Commission File Number)

23804L103 / Datadog Inc / MORGAN STANLEY - MS AMENDMENT Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.2)* Datadog, Inc. - (Name of Issuer) Class A Common Stock - (Title of Class of Securities) 23804L103 - (CUSIP Number) April 30, 2020 - (Date Of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which th

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TEXT-EXTRACT 2 filename2.txt United States securities and exchange commission logo May 1, 2020 David Obstler Chief Financial Officer Datadog, Inc. 620 8th Avenue, 45th Floor New York, NY 10018 Re: Datadog, Inc. Form 10-K for the Fiscal Year Ended December 31, 2019 Filed February 25, 2020 File No. 001-39051 Dear Mr. Obstler: We have reviewed your filing and have the following comments. In some of o

LETTER

United States securities and exchange commission logo May 1, 2020 David Obstler Chief Financial Officer Datadog, Inc.

- DEF 14A

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

- DEFA14A

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 (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

23804L103 / Datadog Inc / PRICE T ROWE ASSOCIATES INC /MD/ Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5) Datadog, Inc. (Name of Issuer) COMMON STOCK (Title of Class of Securities) 23804L103 (CUSIP NUMBER) March 31, 2020 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule pursuant to which this Schedule is filed:

23804L103 / Datadog Inc / Enfield Investments Holdings Corp. - SC 13G Passive Investment

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) 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 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. )* Datadog, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 23804L103 (CUSIP Number)

JOINT FILING AGREEMENT

Exhibit 99 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that they are jointly filing this statement on Schedule 13G.

DDOG / Datadog, Inc. Class A S-8 - - S-8

S-8 As filed with the Securities and Exchange Commission on March 13, 2020. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Datadog, Inc. (Exact name of registrant as specified in its charter) Delaware 27-2825503 (State or other jurisdiction of incorporation or organization) (I.R.S. Emplo

23804L103 / Datadog Inc / PRICE T ROWE ASSOCIATES INC /MD/ Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4) Datadog, Inc. (Name of Issuer) COMMON STOCK (Title of Class of Securities) 23804L103 (CUSIP NUMBER) February 29, 2020 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule pursuant to which this Schedule is fil

List of Subsidiaries of Datadog, Inc.

Exhibit 21.1 Subsidiaries of Datadog, Inc. Name Jurisdiction Datadog France SAS France Madumbo SAS France Datadog Holding Limited Ireland Focusmatic SAS France 1533 Systems LLC United States Datadog Germany GmbH Germany Datadog Ireland Limited Ireland Datadog Japan GK Japan DDog Singapore PTE. LTD. Singapore Datadog Ireland Limited Australia Branch Australia Datadog Ireland Limited UK Branch Unite

Description of Securities.

Exhibit 4.2 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2019, Datadog, Inc. had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended, or the Exchange Act: our Class A common stock, $0.00001 par value per share. References herein to the terms “we,” “our” and “

Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 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: 001-39051 Datadog, Inc.