Datadog, Inc. — Director's Dealing 2021

Jan 4, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2020-12-30

Reporting Person: Agarwal Amit (Chief Product Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-12-30	Common A Common Stock	C	22200	$0.00	Acquired	156462	Direct
2020-12-30	Common A Common Stock	S	2827	$99.7777	Disposed	153635	Direct
2020-12-30	Common A Common Stock	S	1700	$99.9663	Disposed	151935	Direct
2020-12-30	Common A Common Stock	S	9803	$99.9753	Disposed	142132	Direct
2020-12-30	Common A Common Stock	S	4423	$100.3629	Disposed	137709	Direct
2020-12-30	Common A Common Stock	S	500	$100.794	Disposed	137209	Direct
2020-12-30	Common A Common Stock	S	2697	$100.8154	Disposed	134512	Direct
2020-12-30	Common A Common Stock	S	250	$101.19	Disposed	134262	Direct
2020-12-30	Common A Common Stock	C	1000	$0.00	Acquired	1000	Indirect
2020-12-30	Common A Common Stock	S	900	$100.0489	Disposed	100	Indirect
2020-12-30	Common A Common Stock	S	100	$101.16	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-12-31	Class B Common Stock	$	C	22200	Disposed		Class A Common Stock (22200)	Direct
2020-12-31	Class B Common Stock	$	C	1000	Disposed		Class A Common Stock (1000)	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$		Class A Common Stock ()	1080000	Indirect
Class B Common Stock	$		Class A Common Stock ()	1172565	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 $99.03 to $100.00. 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.

F4: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $99.45 to $100.43. 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 $99.41 to $100.39. 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.

F6: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $100.03 to $101.01. 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.

F7: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $100.45 to $101.18. 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.

F8: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $100.42 to $101.25. 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 $101.06 to $101.37. 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: Shares are held by Reporting Person's spouse.

F11: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $99.61 to $100.45. 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 directly by Amit Agarwal 2019 GRAT, of which the Reporting Person is Trustee.

F13: Shares are held directly by Amit Agarwal 2018 GRAT, of which the Reporting Person is Trustee.