Datadog, Inc. — Director's Dealing 2021

Dec 24, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2021-12-21

Reporting Person: OBSTLER DAVID M (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-12-21	Class A Common Stock	C	15000	$0.00	Acquired	188687	Direct
2021-12-21	Class A Common Stock	S	900	$164.9256	Disposed	187787	Direct
2021-12-21	Class A Common Stock	S	1000	$166.091	Disposed	186787	Direct
2021-12-21	Class A Common Stock	S	1700	$167.1024	Disposed	185087	Direct
2021-12-21	Class A Common Stock	S	400	$168.3625	Disposed	184687	Direct
2021-12-21	Class A Common Stock	S	1000	$169.6916	Disposed	183687	Direct
2021-12-21	Class A Common Stock	S	500	$170.47	Disposed	183187	Direct
2021-12-21	Class A Common Stock	S	400	$171.4776	Disposed	182787	Direct
2021-12-21	Class A Common Stock	S	900	$173.2747	Disposed	181887	Direct
2021-12-21	Class A Common Stock	S	2000	$174.5095	Disposed	179887	Direct
2021-12-21	Class A Common Stock	S	1841	$175.266	Disposed	178046	Direct
2021-12-21	Class A Common Stock	S	2376	$176.2977	Disposed	175670	Direct
2021-12-21	Class A Common Stock	S	1983	$177.2552	Disposed	173687	Direct
2021-12-21	Class A Common Stock	C	3750	$0.00	Acquired	3750	Indirect
2021-12-21	Class A Common Stock	S	250	$164.962	Disposed	3500	Indirect
2021-12-21	Class A Common Stock	S	400	$165.8697	Disposed	3100	Indirect
2021-12-21	Class A Common Stock	S	500	$167.0317	Disposed	2600	Indirect
2021-12-21	Class A Common Stock	S	100	$168.045	Disposed	2500	Indirect
2021-12-21	Class A Common Stock	S	350	$169.70	Disposed	2150	Indirect
2021-12-21	Class A Common Stock	S	100	$170.9185	Disposed	2050	Indirect
2021-12-21	Class A Common Stock	S	50	$171.70	Disposed	2000	Indirect
2021-12-21	Class A Common Stock	S	200	$173.2663	Disposed	1800	Indirect
2021-12-21	Class A Common Stock	S	650	$174.4823	Disposed	1150	Indirect
2021-12-21	Class A Common Stock	S	350	$175.4157	Disposed	800	Indirect
2021-12-21	Class A Common Stock	S	400	$176.31	Disposed	400	Indirect
2021-12-21	Class A Common Stock	S	400	$177.2644	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-12-21	Stock Option (Right to Buy)	$1.55	M	15000	Disposed	2028-09-06	Class B Common Stock (15000)	Direct
2021-12-21	Class B Common Stock	$	M	15000	Acquired		Class A Common Stock (15000)	Direct
2021-12-21	Class B Common Stock	$	C	15000	Disposed		Class A Common Stock (15000)	Direct
2021-12-21	Class B Common Stock	$	C	3750	Disposed		Class A Common Stock (3750)	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 June 14, 2021.

F3: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $164.48 to $165.41. 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 $165.64 to $166.41. 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 $166.70 to $167.67. 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.

F6: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $168.09 to $168.84. 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.

F7: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $169.15 to $170.02. 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 $170.19 to $170.75. 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.

F9: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $171.19 to $171.89. 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 $172.84 to $173.76. 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 $173.92 to $174.90. 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 $174.93 to $175.92. 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 $175.93 to $176.88. 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 $176.95 to $177.53. 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 directly by the David Obstler 2019 GRAT, of which Reporting Person is Trustee.

F16: Shares sold pursuant to a 10b5-1 plan entered into on September 10, 2021.

F17: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $164.50 to $165.41. 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 $165.61 to $166.26. 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 $166.72 to $167.7075. 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 $167.82 to $168.27. 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: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $169.12 to $170.07. 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.

F22: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $170.49 to $171.385. 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 $172.91 to $173.44. 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 $173.92 to $174.80. 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.

F25: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $174.99 to $175.88. 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 $176.03 to $176.77. 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 $177.08 to $177.54. 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: Option vests as to 25% on September 6, 2019 and in equal monthly installments thereafter over three years.