Datadog, Inc. — Director's Dealing 2025

Apr 3, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2025-04-01

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-04-01	Class A Common Stock	A	94670	—	Acquired	466535	Direct
2025-04-01	Class A Common Stock	C	85637	$0.3067	Acquired	552172	Direct
2025-04-01	Class A Common Stock	C	30780	$0.9092	Acquired	582952	Direct
2025-04-01	Class A Common Stock	C	10688	$10.74	Acquired	593640	Direct
2025-04-01	Class A Common Stock	S	10771	$99.13	Disposed	582869	Direct
2025-04-01	Class A Common Stock	S	57922	$100.1059	Disposed	524947	Direct
2025-04-01	Class A Common Stock	S	58412	$100.9098	Disposed	466535	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-04-01	Stock Option (Right to Buy)	$0.3067	M	150240	Disposed	2025-10-27	Class B Common Stock (150240)	Direct
2025-04-01	Class B Common Stock	$	M	150240	Acquired		Class A Common Stock (150240)	Direct
2025-04-01	Class B Common Stock	$	C	85637	Disposed		Class A Common Stock (85637)	Direct
2025-04-01	Stock Option (Right to Buy)	$0.9092	M	54000	Disposed	2027-10-25	Class B Common Stock (54000)	Direct
2025-04-01	Class B Common Stock	$	M	54000	Acquired		Class A Common Stock (54000)	Direct
2025-04-01	Class B Common Stock	$	C	30780	Disposed		Class A Common Stock (30780)	Direct
2025-04-01	Stock Option (Right to Buy)	$10.74	M	18750	Disposed	2029-07-19	Class B Common Stock (18750)	Direct
2025-04-01	Class B Common Stock	$	M	18750	Acquired		Class A Common Stock (18750)	Direct
2025-04-01	Class B Common Stock	$	C	10688	Disposed		Class A Common Stock (10688)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	135	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$		Class A Common Stock (6663835)	6663835	Indirect

Footnotes

F1: Represents the number of shares of Class A Common Stock underlying restricted stock units ("RSUs"). Each RSU represents the contingent right to receive one share of the Issuer's Class A Common Stock. The shares underlying the RSUs vest as to 12/48 of the shares on March 1, 2026 and the remainder of the shares vest in 12 equal installments on each June 1, September 1, December 1 and March 1 thereafter, subject to the Reporting Person remaining in Continuous Service (as defined in the Issuer's 2019 Equity Incentive Plan) of the Issuer as of each such date.

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 5, 2023.

F4: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $98.51 to $99.50. 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 $99.51 to $100.50. 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 $100.51 to $101.41. 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: Shares are held by the Alexis Le-Quoc Revocable Trust.

F8: Option is fully vested and exercisable.