Datadog, Inc. — Director's Dealing 2020

Dec 30, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2020-12-28

Reporting Person: De Madre Armelle (Chief People Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-12-28	Class A Common Stock	C	3750	$0.00	Acquired	34648	Direct
2020-12-28	Class A Common Stock	S	775	$100.6448	Disposed	33873	Direct
2020-12-28	Class A Common Stock	S	500	$101.676	Disposed	33373	Direct
2020-12-28	Class A Common Stock	S	300	$102.8367	Disposed	33073	Direct
2020-12-28	Class A Common Stock	S	200	$104.505	Disposed	32873	Direct
2020-12-28	Class A Common Stock	S	1975	$107.2501	Disposed	30898	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-12-28	Stock Option (Right to Buy)	$7.9567	M	3750	Disposed	2029-06-28	Class B Common Stock (3750)	Direct
2020-12-28	Class B Common Stock	$	M	3750	Acquired		Class A Common Stock (3750)	Direct
2020-12-28	Class B Common Stock	$	C	3750	Disposed		Class A Common Stock (3750)	Direct

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 August 18, 2020.

F3: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $100.16 to $101.05. 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.

F4: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $101.47 to $102.27. 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.

F5: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $102.55 to $103.31. 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 $104.21 to $104.80. 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.

F7: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $107.00 to $107.31. 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: Option vested as to 25% on June 20, 2020 and in equal monthly installments thereafter over three years.