Datadog, Inc. — Director's Dealing 2021

Apr 7, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2021-04-05

Reporting Person: Pomel Olivier (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-04-05	Class A Common Stock	C	241350	—	Acquired	404971	Direct
2021-04-05	Class A Common Stock	S	66368	$82.3259	Disposed	338603	Direct
2021-04-05	Class A Common Stock	S	129643	$83.1179	Disposed	208960	Direct
2021-04-05	Class A Common Stock	S	25576	$84.0248	Disposed	183384	Direct
2021-04-05	Class A Common Stock	S	6098	$85.3313	Disposed	177286	Direct
2021-04-05	Class A Common Stock	S	11065	$85.9194	Disposed	166221	Direct
2021-04-05	Class A Common Stock	S	500	$87.20	Disposed	165721	Direct
2021-04-05	Class A Common Stock	S	2100	$87.80	Disposed	163621	Direct
2021-04-05	Class A Common Stock	C	50550	—	Acquired	50550	Indirect
2021-04-05	Class A Common Stock	S	15192	$82.3327	Disposed	35358	Indirect
2021-04-05	Class A Common Stock	S	26479	$83.1319	Disposed	8879	Indirect
2021-04-05	Class A Common Stock	S	4969	$84.0538	Disposed	3910	Indirect
2021-04-05	Class A Common Stock	S	2300	$85.5146	Disposed	1610	Indirect
2021-04-05	Class A Common Stock	S	1510	$86.1038	Disposed	100	Indirect
2021-04-05	Class A Common Stock	S	100	$87.70	Disposed	0	Indirect
2021-04-05	Class A Common Stock	C	37500	—	Acquired	37500	Indirect
2021-04-05	Class A Common Stock	S	11097	$82.3341	Disposed	26403	Indirect
2021-04-05	Class A Common Stock	S	19545	$83.1215	Disposed	6858	Indirect
2021-04-05	Class A Common Stock	S	3937	$84.0446	Disposed	2921	Indirect
2021-04-05	Class A Common Stock	S	1872	$85.5331	Disposed	1049	Indirect
2021-04-05	Class A Common Stock	S	1049	$86.1294	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-04-05	Class B Common Stock	$	C	241350	Disposed		Class A Common Stock (241350)	Direct
2021-04-05	Class B Common Stock	$	C	50550	Disposed		Class A Common Stock (50550)	Indirect
2021-04-05	Class B Common Stock	$	C	37500	Disposed		Class A Common Stock (37500)	Indirect

Footnotes

F1: Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, 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 nine-month anniversary of 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 14, 2020.

F3: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $81.71 to $82.70. 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.

F4: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $82.71 to $83.70. 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.

F5: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $83.71 to $84.70. 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.

F6: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $84.71 to $85.70. 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.

F7: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $85.72 to $86.67. 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 $86.80 to $87.70. 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.

F9: Shares are held by the Olivier Pomel 2018 GRAT.

F10: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $81.76 to $82.74. 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 $82.76 to $83.75. 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: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $83.76 to $84.68. 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 $84.85 to $85.84. 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 $85.85 to $86.80. 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: Shares are held by the Pomel Descendents' 2018 Trust. Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest, if any, in the shares.

F16: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $81.73 to $82.71. 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 $82.75 to $83.74. 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 $83.75 to $84.68. 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 $84.80 to $85.78. 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 $85.83 to $86.81. 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.