Datadog, Inc. — Director's Dealing 2020

May 11, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2020-05-07

Reporting Person: Kopits Laszlo (General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-05-07	Class A Common Stock	C	7101	$0.00	Acquired	11100	Direct
2020-05-07	Class A Common Stock	S	4925	$47.6263	Disposed	6175	Direct
2020-05-07	Class A Common Stock	S	800	$48.895	Disposed	5375	Direct
2020-05-07	Class A Common Stock	S	5375	$49.9652	Disposed	0	Direct
2020-05-08	Class A Common Stock	A	32724	$0.00	Acquired	32724	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-05-07	Class B Common Stock	$	C	7101	Disposed		Class A Common Stock (7101)	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 December 12, 2019.

F3: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $47.43 to $48.35. 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 $48.64 to $49.40. 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 $49.70 to $50.04. 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: 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, 2021 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.