Statement of Changes in Beneficial Ownership (4)

FORM 4

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * Agarwal Amit	2. Issuer Name and Ticker or Trading Symbol Datadog, Inc. [ DDOG ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) Chief Product Officer
(Last)          (First)          (Middle) C/O DATADOG, INC., 620 8TH AVENUE, 45TH FLOOR	3. Date of Earliest Transaction (MM/DD/YYYY) 9/15/2020
(Street) NEW YORK, NY 10018 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common A Common Stock	9/15/2020		C(1)		12500	A	$0.00	12500	I	By GRAT (2)
Common A Common Stock	9/15/2020		S(3)		2733	D	$85.7861 (4)	9767	I	By GRAT (2)
Common A Common Stock	9/15/2020		S(3)		2200	D	$86.8582 (5)	7567	I	By GRAT (2)
Common A Common Stock	9/15/2020		S(3)		4533	D	$87.8756 (6)	3034	I	By GRAT (2)
Common A Common Stock	9/15/2020		S(3)		2834	D	$88.5858 (7)	200	I	By GRAT (2)
Common A Common Stock	9/15/2020		S(3)		200	D	$89.355 (8)	0	I	By GRAT (2)
Common A Common Stock								134262	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class B Common Stock	(1)	9/15/2020		C			12500	(1)	(1)	Class A Common Stock	12500	$0.00	1631065	I	By GRAT (2)
Class B Common Stock	(1)							(1)	(1)	Class A Common Stock	(1)		1299607	D
Class B Common Stock	(1)							(1)	(1)	Class A Common Stock	(1)		373166	I	By Spouse (9)
Class B Common Stock	(1)							(1)	(1)	Class A Common Stock	(1)		1710000	I	By GRAT (10)

Explanation of Responses:
(1)	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.
(2)	Shares are held directly by Amit Agarwal 2018 GRAT, of which the Reporting Person is Trustee.
(3)	Shares sold pursuant to a 10b5-1 plan entered into on December 13, 2019.
(4)	Price reported is a weighted-average sales price. The shares were sold at prices ranging from $85.23 to $86.22. 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.
(5)	Price reported is a weighted-average sales price. The shares were sold at prices ranging from $86.24 to $87.23. 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.
(6)	Price reported is a weighted-average sales price. The shares were sold at prices ranging from $87.30 to $88.29. 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.
(7)	Price reported is a weighted-average sales price. The shares were sold at prices ranging from $88.30 to $89.07. 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.
(8)	Price reported is a weighted-average sales price. The shares were sold at prices ranging from $89.32 to $89.39. 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.
(9)	Shares are held by Reporting Person's spouse.
(10)	Shares are held directly by Amit Agarwal 2019 GRAT, of which the Reporting Person is Trustee.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Agarwal Amit C/O DATADOG, INC. 620 8TH AVENUE, 45TH FLOOR NEW YORK, NY 10018			Chief Product Officer

Signatures
Amit Agarwal, by /s/ Ron A. Metzger, Attorney-in-Fact		9/17/2020
**Signature of Reporting Person		Date