Datadog, Inc. — Director's Dealing 2021

Apr 12, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2021-04-08

Reporting Person: De Madre Armelle (Chief People Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-04-08	Class A Common Stock	C	1875	$0.00	Acquired	40773	Direct
2021-04-08	Class A Common Stock	S	1875	$90.00	Disposed	38898	Direct
2021-04-08	Class A Common Stock	A	23958	$0.00	Acquired	62856	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-04-08	Stock Option (Right to Buy)	$7.9567	M	1875	Disposed	2029-06-28	Class B Common Stock (1875)	Direct
2021-04-08	Class B Common Stock	$	M	1875	Acquired		Class A Common Stock (1875)	Direct
2021-04-08	Class B Common Stock	$	C	1875	Disposed		Class A Common Stock (1875)	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: Represents the number of shares of Class A Common Stock underlying restricted stock units ("RSUs"). Each RSU represents the contingent right to receive one share of the Issuer's Class A Common Stock. The shares underlying the RSUs vest in 12 equal quarterly installments beginning on June 1, 2022 and on each September 1, December 1 and March 1 thereafter, subject to the Reporting Person remaining in Continuous Service (as defined in the Issuer's 2019 Equity Incentive Plan) of the Issuer as of each such date.

F4: Option vested as to 25% on June 20, 2020 and in equal monthly installments thereafter over three years.