DDOG Form 4: CFO Obstler Sells 12,619 Shares to Cover Taxes

Rhea-AI Filing Summary

Datadog, Inc. (DDOG) reporting person David M. Obstler, CFO, disclosed a non-derivative sale of Class A common stock on 09/02/2025. The filing shows 12,619 shares were sold under code S(1) at a weighted-average price of $133.8474, with reported sale prices ranging from $132.94 to $133.85. After the sale, the reporting person beneficially owned 386,651 shares.

The sale was executed to cover tax withholding obligations arising from vested restricted stock units and performance-based restricted stock units, plus related brokerage fees. The filer offers to provide detailed per-price lots upon request.

Insights

Financial Analyst

TL;DR: Routine tax-withholding sale by CFO; modest share disposal relative to total holdings, neutral for valuation.

The transaction represents a targeted sale to satisfy tax withholding on vested equity rather than an open-market reduction of a strategic stake. 12,619 shares were sold at a weighted-average of $133.8474, leaving 386,651 shares beneficially owned. For investors, such disclosures signal routine insider administrative activity without direct operational implications. No options or derivatives were reported as exercised or acquired in this filing.

Corporate Governance Expert

TL;DR: Disclosure aligns with standard governance practice for tax-related share sales; transparency is appropriate.

The filing clearly states the sale was required to cover tax withholding on vested RSUs and PBRSUs and provides price range and weighted-average pricing. The reporter also commits to furnish per-price lot details on request, which supports transparency. The form is signed by an attorney-in-fact, following execution formalities.

Insider Trade Summary

Net Seller: 12,619 shares ($1,689,020)

Net Sell 1 txn

Insider OBSTLER DAVID M

Role Chief Financial Officer

Sold 12,619 shs ($1.69M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	12,619	$133.8474	$1.69M

Holdings After Transaction: Class A Common Stock — 386,651 shares (Direct)

Footnotes (1)

1. The Reporting Person was required by the Issuer to sell only the number of shares of common stock necessary to cover applicable tax withholding obligations realized upon the vesting of restricted stock units and performance-based restricted stock units, as well as any related brokerage commission fees. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $132.94 to $133.85. 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.

Form 4 Insider Transactions: What Each Field Means →

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).

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^*

OBSTLER DAVID M

(Last) (First) (Middle)

C/O DATADOG, INC.

620 8TH AVENUE, 45TH FLOOR

(Street)

NEW YORK NY 10018

(City) (State) (Zip)

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 Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/02/2025

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

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. 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	09/02/2025		S(1)		12,619	D	$133.8474(2)	386,651	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

Explanation of Responses:

1. The Reporting Person was required by the Issuer to sell only the number of shares of common stock necessary to cover applicable tax withholding obligations realized upon the vesting of restricted stock units and performance-based restricted stock units, as well as any related brokerage commission fees.

2. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $132.94 to $133.85. 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.

Remarks:

	/s/ Kerry Acocella, Attorney-in-Fact	09/04/2025
	** 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.

FAQ

What did Datadog CFO David Obstler disclose on Form 4 (DDOG)?

The CFO disclosed a sale of 12,619 Class A shares on 09/02/2025 at a weighted-average price of $133.8474.

Why were the DDOG shares sold by the reporting person?

The sale was made to cover tax withholding obligations from vested restricted stock units and performance-based restricted stock units, plus brokerage fees.

How many DDOG shares did the reporting person own after the transaction?

After the reported sale the reporting person beneficially owned 386,651 shares.

What price range were the DDOG shares sold at?

Shares were sold at prices ranging from $132.94 to $133.85; the filing reports a weighted-average price of $133.8474.

Can I obtain the number of shares sold at each separate price?

Yes. The reporting person stated they will provide, upon request, full information regarding the number of shares sold at each separate price.