Datadog, Inc. — Director's Dealing 2021

Aug 9, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2021-08-05

Reporting Person: Agarwal Amit (Chief Product Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-08-05	Common A Common Stock	C	365442	$0.00	Acquired	538739	Direct
2021-08-05	Common A Common Stock	S	3200	$127.3709	Disposed	535539	Direct
2021-08-05	Common A Common Stock	S	5547	$128.5443	Disposed	529992	Direct
2021-08-05	Common A Common Stock	S	76242	$129.4775	Disposed	453750	Direct
2021-08-05	Common A Common Stock	S	31168	$130.7437	Disposed	422582	Direct
2021-08-05	Common A Common Stock	S	67921	$131.6101	Disposed	354661	Direct
2021-08-05	Common A Common Stock	S	42391	$132.6088	Disposed	312270	Direct
2021-08-05	Common A Common Stock	S	65132	$133.7395	Disposed	247138	Direct
2021-08-05	Common A Common Stock	S	57729	$134.6758	Disposed	189409	Direct
2021-08-05	Common A Common Stock	S	16112	$135.2336	Disposed	173297	Direct
2021-08-05	Common A Common Stock	C	68320	$0.00	Acquired	68320	Indirect
2021-08-05	Common A Common Stock	S	1100	$127.5282	Disposed	67220	Indirect
2021-08-05	Common A Common Stock	S	12100	$129.2473	Disposed	55120	Indirect
2021-08-05	Common A Common Stock	S	2443	$130.2673	Disposed	52677	Indirect
2021-08-05	Common A Common Stock	S	14769	$131.1014	Disposed	37908	Indirect
2021-08-05	Common A Common Stock	S	8848	$132.1416	Disposed	29060	Indirect
2021-08-05	Common A Common Stock	S	7815	$133.1888	Disposed	21245	Indirect
2021-08-05	Common A Common Stock	S	14425	$134.0966	Disposed	6820	Indirect
2021-08-05	Common A Common Stock	S	6820	$135.0464	Disposed	0	Indirect
2021-08-05	Common A Common Stock	C	203854	$0.00	Acquired	203854	Indirect
2021-08-05	Common A Common Stock	S	1700	$127.4935	Disposed	202154	Indirect
2021-08-05	Common A Common Stock	S	3600	$128.3277	Disposed	198554	Indirect
2021-08-05	Common A Common Stock	S	52055	$129.6171	Disposed	146499	Indirect
2021-08-05	Common A Common Stock	S	17493	$130.6255	Disposed	129006	Indirect
2021-08-05	Common A Common Stock	S	28698	$131.4691	Disposed	100308	Indirect
2021-08-05	Common A Common Stock	S	27351	$132.4459	Disposed	72957	Indirect
2021-08-05	Common A Common Stock	S	38702	$133.6513	Disposed	34255	Indirect
2021-08-05	Common A Common Stock	S	29421	$134.4424	Disposed	4834	Indirect
2021-08-05	Common A Common Stock	S	4834	$135.1327	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-08-05	Class B Common Stock	$	C	365442	Disposed		Class A Common Stock (365442)	Direct
2021-08-05	Class B Common Stock	$	C	68320	Disposed		Class A Common Stock (68320)	Indirect
2021-08-05	Class B Common Stock	$	C	203854	Disposed		Class A Common Stock (203854)	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$		Class A Common Stock ()	1148365	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 entered into on September 2, 2020.

F3: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $126.99 to $127.93. 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 $128.07 to $129.06. 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 $129.07 to $130.05. 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 $130.15 to $131.14. 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 $131.15 to $132.14. 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 $132.15 to $133.14. 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 $133.15 to $134.14. 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.

F10: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $134.15 to $135.145. 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.

F11: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $135.15 to $135.29. 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.

F12: Shares are held by Reporting Person's spouse.

F13: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $127.13 to $128.00. 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.

F14: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $128.63 to $129.58. 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.

F15: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $129.64 to $130.63. 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.

F16: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $130.64 to $131.60. 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.

F17: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $131.64 to $132.63. 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.

F18: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $132.66 to $133.65. 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.

F19: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $133.66 to $134.64. 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.

F20: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $134.66 to $135.33. 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.

F21: Shares are held directly by Amit Agarwal 2019 GRAT, of which the Reporting Person is Trustee.

F22: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $126.98 to $127.93. 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.

F23: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $128.00 to $128.97. 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.

F24: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $129.02 to $130.015. 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.

F25: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $130.02 to $131.01. 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.

F26: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $131.02 to $132.00. 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.

F27: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $132.02 to $133.01. 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.

F28: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $133.02 to $134.01. 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.

F29: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $134.02 to $135.00. 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.

F30: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $135.02 to $135.35. 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.

F31: Shares are held directly by Amit Agarwal 2018 GRAT, of which the Reporting Person is Trustee.