| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Galloreese David | Chief People Officer | C/O DATADOG, INC., 620 8TH AVENUE, 45TH FLOOR, NEW YORK | /s/ Kerry Acocella, Attorney-in-Fact | 2025-12-04 | 0001757760 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | DDOG | Class A Common Stock | Sale | -$405K | -2.55K | -3.19% | $158.60 | 77.4K | Dec 2, 2025 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | The Reporting Person was required by the Issuer to sell only the number of shares of common stock necessary to cover applicable tax withholding obligations realized upon the vesting of restricted stock units and performance-based restricted stock units, as well as any related brokerage commission fees. |
| F2 | Includes 69 shares acquired on November 14, 2025 under the Issuers Employee Stock Purchase Plan. |