Datadog, Inc. — Director's Dealing 2022

Feb 19, 2022

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2022-02-16

Reporting Person: OBSTLER DAVID M (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2022-02-16	Class A Common Stock	C	3750	$0.00	Acquired	3750	Indirect
2022-02-16	Class A Common Stock	S	400	$167.305	Disposed	3350	Indirect
2022-02-16	Class A Common Stock	S	100	$168.12	Disposed	3250	Indirect
2022-02-16	Class A Common Stock	S	1500	$170.6093	Disposed	1750	Indirect
2022-02-16	Class A Common Stock	S	401	$172.0118	Disposed	1349	Indirect
2022-02-16	Class A Common Stock	S	400	$172.8225	Disposed	949	Indirect
2022-02-16	Class A Common Stock	S	657	$173.9858	Disposed	292	Indirect
2022-02-16	Class A Common Stock	S	292	$175.2073	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2022-02-16	Class B Common Stock	$	C	3750	Disposed		Class A Common Stock (3750)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	173687	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$		Class A Common Stock (15603)	15603	Direct

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 are held directly by the David Obstler 2019 GRAT, of which Reporting Person is Trustee.

F3: Shares sold pursuant to a 10b5-1 plan entered into on September 10, 2021.

F4: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $166.96 to $167.94. 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 $170.30 to $171.29. 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 $171.39 to $172.34. 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 $172.5 to $173.09. 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 $173.59 to $174.39. 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: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $174.85 to $175.70. 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.