Datadog (DDOG)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-07 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Datadog, Inc. (DDOG) CIK: 0001561550 --- Reporting Owner --- Name: Richardson Julie CIK: 0001466857 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-05-07 | Code: S (Open market sale) Shares: -2,433 | Price: $188.50 Total Value: $458,620.50 Shares Owned After: 4,036 | Ownership: D (Direct) Footnotes: [F1] Shares sold pursuant to a 10b5-1 plan dated November 7, 2025. [F2] The balance reported reflects a correction of 2,301 shares reported as gifted on December 10, 2021, which did not occur. This Form 4 is also deemed to amend and restate the number of shares reported as beneficially owned on each Form 4 filed on or after December 10, 2021. [Transaction #2] Security: Class A Common Stock Date: 2026-05-08 | Code: S (Open market sale) Shares: -1,930 | Price: $185.82 Total Value: $358,632.60 Shares Owned After: 2,106 | Ownership: D (Direct) Footnotes: [F1] Shares sold pursuant to a 10b5-1 plan dated November 7, 2025. [F2] The balance reported reflects a correction of 2,301 shares reported as gifted on December 10, 2021, which did not occur. This Form 4 is also deemed to amend and restate the number of shares reported as beneficially owned on each Form 4 filed on or after December 10, 2021. --- Footnotes (Complete Index) --- F1: Shares sold pursuant to a 10b5-1 plan dated November 7, 2025. F2: The balance reported reflects a correction of 2,301 shares reported as gifted on December 10, 2021, which did not occur. This Form 4 is also deemed to amend and restate the number of shares reported as beneficially owned on each Form 4 filed on or after December 10, 2021. --- Signature --- /s/ /s/ Kerry Acocella, Attorney-in-Fact (2026-05-11)