[Form 4] Datadog, Inc. Insider Trading Activity

Datadog, Inc. (symbol: DDOG) is the issuer of record for a Form 4 filing submitted to the SEC.

Rhea-AI Filing Summary

Datadog, Inc. (symbol: DDOG) is the issuer of record for a Form 4 filing submitted to the SEC.

Insider Trade Summary 10b5-1

Exercise and sale activity reported; no spread calculated

Exercise and Sale 6 txns

Insider Richardson Julie

Role Director

Sold 5,625 shs ($1.19M)

Approx. gross sale proceeds $1.19M

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy) F5	5,625	$0.00	$0.00
Exercise	Class B Common Stock F1	5,625	$7.9567	$45K
Conversion	Class B Common Stock F1	5,625	$0.00	$0.00
Conversion	Class A Common Stock F1	5,625	$0.00	$0.00
Sale	Class A Common Stock F2, F3	5,212	$212.2051	$1.11M
Sale	Class A Common Stock F2, F4	413	$212.8518	$88K

Holdings After Transaction: Stock Option (Right to Buy) — 16,878 contracts (Direct); Class B Common Stock — 0 contracts (Direct); Class A Common Stock — 3,178 shares (Direct)

Footnotes (5)

1. 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.
2. F2. Shares sold pursuant to a 10b5-1 plan dated June 4, 2026.
3. F3. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $211.54 to $212.51. 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.
4. F4. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $212.6 to $213.04. 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.
5. F5. The option is fully vested and exercisable.

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Available on EDGAR 09/09/2026 - 04:32 PM Accepted by SEC EDGAR 09/09/2026 - 04:32 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Richardson Julie

(Last) (First) (Middle)

C/O DATADOG, INC.

620 8TH AVENUE, 45TH FLOOR

(Street)

NEW YORK NEW YORK 10018

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Datadog, Inc. [ DDOG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/04/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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
Class A Common Stock	09/04/2026		C(1)		5,625	A	$0	8,803	D
Class A Common Stock	09/04/2026		S(2)		5,212	D	$212.2051(3)	3,591	D
Class A Common Stock	09/04/2026		S(2)		413	D	$212.8518(4)	3,178	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction 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 (Month/Day/Year)		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: 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
Stock Option (Right to Buy)	$7.9567	09/04/2026		M			5,625	(5)	06/12/2029	Class B Common Stock	5,625	$0	16,878	D
Class B Common Stock	(1)	09/04/2026		M		5,625		(1)	(1)	Class A Common Stock	5,625	$7.9567	5,625	D
Class B Common Stock	(1)	09/04/2026		C			5,625	(1)	(1)	Class A Common Stock	5,625	$0	0	D

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 sold pursuant to a 10b5-1 plan dated June 4, 2026.

3. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $211.54 to $212.51. 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.

4. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $212.6 to $213.04. 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.

5. The option is fully vested and exercisable.

Remarks:

	/s/ Kerry Acocella, Attorney-in-Fact	09/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)