Datadog, Inc. — Director's Dealing 2025

Nov 13, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2025-11-11

Reporting Person: Le-Quoc Alexis (Director, Chief Technology Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-11-11	Class A Common Stock	C	10688	—	Acquired	449573	Direct
2025-11-11	Class A Common Stock	S	9905	$196.7772	Disposed	439668	Direct
2025-11-11	Class A Common Stock	S	29407	$197.6483	Disposed	410261	Direct
2025-11-11	Class A Common Stock	S	5522	$198.609	Disposed	404739	Direct
2025-11-11	Class A Common Stock	S	6143	$199.7648	Disposed	398596	Direct
2025-11-11	Class A Common Stock	S	2555	$200.46	Disposed	396041	Direct
2025-11-11	Class A Common Stock	S	380	$201.4263	Disposed	395661	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-11-11	Stock Option (Right to Buy)	$10.74	M	18750	Disposed	2029-07-19	Class B Common Stock (18750)	Direct
2025-11-11	Class B Common Stock	$	M	18750	Acquired		Class A Common Stock (18750)	Direct
2025-11-11	Class B Common Stock	$	C	10688	Disposed		Class A Common Stock (10688)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	169	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$		Class A Common Stock (6326835)	6326835	Indirect

Footnotes

F1: 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.

F2: Shares sold pursuant to a 10b5-1 plan dated September 5, 2023.

F3: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $196.1700 to $197.1600. 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.

F4: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $197.1700 to $198.1500. 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 $198.1700 to $199.1600. 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 $199.2400 to $200.2100. 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: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $200.2500 to $200.9700. 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.

F8: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $201.3200 to $201.5300. 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.

F9: Shares are held by the Alexis Le-Quoc Revocable Trust.

F10: Option is fully vested and exercisable.