SEC Form 4 · accession 0001561550-26-000202

Datadog, Inc. · DDOG

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Sean Michael Walters

Officer — Chief Revenue Officer

Period of report

Jun 11, 2026

Accepted (ET)

Jun 15, 2026 · 4:41 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0001561550

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock^F2	Jun 11, 2026	S	200	$225.1832	D	270,096	D
Class A Common Stock^F3	Jun 11, 2026	S	200	$226.105	D	269,896	D
Class A Common Stock^F4	Jun 11, 2026	S	800	$227.535	D	269,096	D
Class A Common Stock^F5	Jun 11, 2026	S	800	$228.7598	D	268,296	D
Class A Common Stock^F6	Jun 11, 2026	S	2,300	$229.7562	D	265,996	D
Class A Common Stock^F7	Jun 11, 2026	S	2,287	$230.8406	D	263,709	D
Class A Common Stock^F8	Jun 11, 2026	S	1,613	$232.014	D	262,096	D
Class A Common Stock^F9	Jun 11, 2026	S	2,197	$232.9037	D	259,899	D
Class A Common Stock^F10	Jun 11, 2026	S	1,479	$233.9133	D	258,420	D
Class A Common Stock	holding	—	—		—	8	I	By Son

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1Shares sold pursuant to a 10b5-1 plan dated December 12, 2025.
F10Price reported is a weighted-average sales price. The shares were sold at prices ranging from $233.54 to $234.20. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F2Price reported is a weighted-average sales price. The shares were sold at prices ranging from $224.79 to $225.56. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F3Price reported is a weighted-average sales price. The shares were sold at prices ranging from $226.03 to $226.18. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F4Price reported is a weighted-average sales price. The shares were sold at prices ranging from $227.11 to $228.08. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F5Price reported is a weighted-average sales price. The shares were sold at prices ranging from $228.13 to $229.05. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F6Price reported is a weighted-average sales price. The shares were sold at prices ranging from $229.19 to $230.17. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F7Price reported is a weighted-average sales price. The shares were sold at prices ranging from $230.40 to $231.37. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F8Price reported is a weighted-average sales price. The shares were sold at prices ranging from $231.45 to $232.36. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F9Price reported is a weighted-average sales price. The shares were sold at prices ranging from $232.46 to $233.38. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.