X0407 4 2023-06-02 0 0001561550 Datadog, Inc. DDOG 0001861590 Blitzer Adam C/O DATADOG, INC. 620 8TH AVENUE, 45TH FLOOR NEW YORK NY 10018 0 1 0 0 Chief Operating Officer 0 Common A Common Stock 2023-06-02 4 S 0 8428 100.332 D 220016 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. Adam Blitzer, by /s/ Ron A. Metzger, Attorney-in-Fact 2023-06-06