Datadog, Inc. — Director's Dealing 2025

Dec 4, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2025-12-02

Reporting Person: Pomel Olivier (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-02	Class A Common Stock	S	15225	$158.5985	Disposed	518133	Direct
2025-12-03	Class A Common Stock	C	21728	—	Acquired	539861	Direct
2025-12-03	Class A Common Stock	C	11195	—	Acquired	551056	Direct
2025-12-03	Class A Common Stock	S	15919	$153.8138	Disposed	535137	Direct
2025-12-03	Class A Common Stock	S	4020	$154.4681	Disposed	531117	Direct
2025-12-03	Class A Common Stock	S	12884	$155.6801	Disposed	518233	Direct
2025-12-03	Class A Common Stock	S	100	$156.23	Disposed	518133	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-12-03	Stock Option (Right to Buy)	$0.9092	M	38118	Disposed	2027-10-24	Class B Common Stock (38118)	Direct
2025-12-03	Class B Common Stock	$	M	38118	Acquired		Class A Common Stock (38118)	Direct
2025-12-03	Class B Common Stock	$	C	32923	Disposed		Class A Common Stock (32923)	Direct

Footnotes

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: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon the earliest of: (i) any transfer, whether or not for value, except for certain "Permitted Transfers" as defined in the Issuer's amended and restated certificate of incorporation, (ii) the death of the Reporting Person in the case of shares held directly or in a trustee capacity, and (iii) the tenth anniversary of the Issuer's initial public offering of its Class A Common Stock.

F3: Shares sold pursuant to a 10b5-1 plan dated September 13, 2024.

F4: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $153.20 to $154.19. 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.

F5: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $154.20 to $155.19. 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.

F6: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $155.21 to $156.18. 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.

F7: Option is fully vested and exercisable.