X0407 4 2023-06-02 0 0001561550 Datadog, Inc. DDOG 0001783990 Pomel Olivier C/O DATADOG, INC. 620 8TH AVENUE, 45TH FLOOR NEW YORK NY 10018 1 1 0 0 Chief Executive Officer 0 Common A Common Stock 2023-06-02 4 S 0 18652 100.332 D 336486 D 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, as well as any related brokerage commission fees. Olivier Pomel, by /s/ Ron A. Metzger, Attorney-in-Fact 2023-06-06