Datadog, Inc. — Director's Dealing 2021

Mar 26, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2021-03-24

Reporting Person: Agarwal Amit (Chief Product Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-03-24	Common A Common Stock	C	7500	$0.00	Acquired	141762	Direct
2021-03-24	Common A Common Stock	S	3291	$81.4767	Disposed	138471	Direct
2021-03-24	Common A Common Stock	S	2709	$82.5182	Disposed	135762	Direct
2021-03-24	Common A Common Stock	S	1200	$83.3142	Disposed	134562	Direct
2021-03-24	Common A Common Stock	S	200	$84.285	Disposed	134362	Direct
2021-03-24	Common A Common Stock	S	100	$85.24	Disposed	134262	Direct
2021-03-24	Common A Common Stock	C	1000	$0.00	Acquired	1000	Indirect
2021-03-24	Common A Common Stock	S	300	$81.4837	Disposed	700	Indirect
2021-03-24	Common A Common Stock	S	500	$82.6872	Disposed	200	Indirect
2021-03-24	Common A Common Stock	S	180	$83.6422	Disposed	20	Indirect
2021-03-24	Common A Common Stock	S	20	$84.68	Disposed	0	Indirect
2021-03-24	Common A Common Stock	C	12500	$0.00	Acquired	12500	Indirect
2021-03-24	Common A Common Stock	S	5666	$81.4939	Disposed	6834	Indirect
2021-03-24	Common A Common Stock	S	4816	$82.6438	Disposed	2018	Indirect
2021-03-24	Common A Common Stock	S	1618	$83.4039	Disposed	400	Indirect
2021-03-24	Common A Common Stock	S	300	$84.2733	Disposed	100	Indirect
2021-03-24	Common A Common Stock	S	100	$85.24	Disposed	0	Indirect
2021-03-24	Common A Common Stock	C	2200	$0.00	Acquired	2200	Indirect
2021-03-24	Common A Common Stock	S	1182	$81.6638	Disposed	1018	Indirect
2021-03-24	Common A Common Stock	S	618	$82.6751	Disposed	400	Indirect
2021-03-24	Common A Common Stock	S	300	$83.5733	Disposed	100	Indirect
2021-03-24	Common A Common Stock	S	100	$85.34	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-03-24	Class B Common Stock	$	C	7500	Disposed		Class A Common Stock (7500)	Direct
2021-03-24	Class B Common Stock	$	C	1000	Disposed		Class A Common Stock (1000)	Indirect
2021-03-24	Class B Common Stock	$	C	12500	Disposed		Class A Common Stock (12500)	Indirect
2021-03-24	Class B Common Stock	$	C	2200	Disposed		Class A Common Stock (2200)	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 $81.09 to $82.07. 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 $82.09 to $83.04. 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 $83.09 to $83.73. 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 $84.22 to $84.35. 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.

F7: Shares are held by Reporting Person's spouse.

F8: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $81.09 to $81.99. 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 $82.22 to $83.18. 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.

F10: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $83.26 to $84.17. 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: Shares are held directly by Amit Agarwal 2019 GRAT, of which the Reporting Person is Trustee.

F12: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $81.08 to $82.05. 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.

F13: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $82.12 to $83.11. 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 $83.12 to $83.94. 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.

F15: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $84.12 to $84.35. 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.

F16: Shares are held directly by Amit Agarwal 2018 GRAT, of which the Reporting Person is Trustee.

F17: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $81.20 to $82.16. 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 $82.26 to $83.17. 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 $83.27 to $84.13. 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.