Datadog, Inc. — Director's Dealing 2021

Oct 29, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2021-10-27

Reporting Person: OBSTLER DAVID M (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-10-27	Class A Common Stock	C	15000	$0.00	Acquired	190391	Direct
2021-10-27	Class A Common Stock	S	800	$156.2912	Disposed	189591	Direct
2021-10-27	Class A Common Stock	S	6160	$157.3794	Disposed	183431	Direct
2021-10-27	Class A Common Stock	S	3500	$158.4261	Disposed	179931	Direct
2021-10-27	Class A Common Stock	S	2440	$159.3777	Disposed	177491	Direct
2021-10-27	Class A Common Stock	S	800	$160.4675	Disposed	176691	Direct
2021-10-27	Class A Common Stock	S	600	$162.1233	Disposed	176091	Direct
2021-10-27	Class A Common Stock	S	700	$162.9586	Disposed	175391	Direct
2021-10-27	Class A Common Stock	C	73750	$0.00	Acquired	73750	Indirect
2021-10-27	Class A Common Stock	S	2344	$156.2926	Disposed	71406	Indirect
2021-10-27	Class A Common Stock	S	21092	$157.3273	Disposed	50314	Indirect
2021-10-27	Class A Common Stock	S	13364	$158.3147	Disposed	36950	Indirect
2021-10-27	Class A Common Stock	S	9516	$159.3286	Disposed	27434	Indirect
2021-10-27	Class A Common Stock	S	2900	$160.2997	Disposed	24534	Indirect
2021-10-27	Class A Common Stock	S	1100	$161.66	Disposed	23434	Indirect
2021-10-27	Class A Common Stock	S	14408	$162.4539	Disposed	9026	Indirect
2021-10-27	Class A Common Stock	S	8800	$163.1693	Disposed	226	Indirect
2021-10-27	Class A Common Stock	S	226	$164.0442	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-10-27	Stock Option (Right to Buy)	$1.55	M	15000	Disposed	2028-09-06	Class B Common Stock (15000)	Direct
2021-10-27	Class B Common Stock	$	M	15000	Acquired		Class A Common Stock (15000)	Direct
2021-10-27	Class B Common Stock	$	C	15000	Disposed		Class A Common Stock (15000)	Direct
2021-10-27	Class B Common Stock	$	C	73750	Disposed		Class A Common Stock (73750)	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 $155.94 to $156.92. 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.

F4: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $156.97 to $157.96. 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 $157.99 to $158.98. 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 $159.00 to $159.91. 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 $160.08 to $161.02. 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 $161.62 to $162.50. 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 $162.68 to $163.41. 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.

F10: Shares are held directly by the David Obstler 2019 GRAT, of which Reporting Person is Trustee.

F11: Shares sold pursuant to a 10b5-1 plan entered into on September 10, 2021.

F12: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $155.86 to $156.82. 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 $156.87 to $157.86. 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 $157.87 to $158.85. 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 $158.87 to $159.84. 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.

F16: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $159.875 to $160.76. 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.

F17: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $160.97 to $161.95. 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 $162.00 to $162.98. 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 $163.00 to $163.56. 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 $164.00 to $164.05. 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.

F21: Option vests as to 25% on September 6, 2019 and in equal monthly installments thereafter over three years.