Datadog, Inc. — Director's Dealing 2021

May 5, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2021-05-03

Reporting Person: Ittycheria Dev (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-03	Class A Common Stock	S	47301	$80.2969	Disposed	496031	Direct
2021-05-03	Class A Common Stock	S	17113	$81.4861	Disposed	478918	Direct
2021-05-03	Class A Common Stock	S	10750	$82.7514	Disposed	468168	Direct
2021-05-03	Class A Common Stock	S	16061	$83.5118	Disposed	452107	Direct
2021-05-03	Class A Common Stock	S	6644	$84.3836	Disposed	445463	Direct
2021-05-03	Class A Common Stock	S	1687	$85.0912	Disposed	443776	Direct
2021-05-03	Class A Common Stock	S	844	$86.33	Disposed	442932	Direct
2021-05-03	Class A Common Stock	S	94324	$80.2969	Disposed	611565	Indirect
2021-05-03	Class A Common Stock	S	34137	$81.4862	Disposed	577428	Indirect
2021-05-03	Class A Common Stock	S	21434	$82.7513	Disposed	555994	Indirect
2021-05-03	Class A Common Stock	S	32037	$83.5117	Disposed	523957	Indirect
2021-05-03	Class A Common Stock	S	13227	$84.3828	Disposed	510730	Indirect
2021-05-03	Class A Common Stock	S	3358	$85.0913	Disposed	507372	Indirect
2021-05-03	Class A Common Stock	S	1683	$86.33	Disposed	505689	Indirect

Footnotes

F1: Shares sold pursuant to a 10b5-1 plan entered into on March 11, 2021.

F2: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $80.00 to $80.99. 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.

F3: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $81.00 to $81.99. 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 $82.02 to $83.01. 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 $83.02 to $84.01. 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 $84.02 to $85.01. 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 $85.03 to $85.11. 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: Shares are held directly by LIDI 11 21 LLC (the "LLC"). The Ittycheria Family Trust (the "Trust") is the sole member of the LLC and Reporting Person is a beneficiary of the Trust.