Form 144: 32,363 DDOG Class A Shares Proposed Sale

Morgan Stanley Smith Barney LLC filed a Form 144 to sell 32,363 shares of Class A common stock.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC filed a Form 144 to sell 32,363 shares of Class A common stock.

The filing states the shares to be sold relate to Restricted Stock Units and Performance Stock Units vesting on 03/01/2026. The excerpt also shows prior sales by Sean Michael Walters of 9,838 shares on 12/11/2025 and 10,530 shares on 12/02/2025. Shares outstanding were 328,274,648 as of 03/02/2026.

Insights

Equity Capital Markets Analyst

Form 144 notifies proposed resale of 32,363 vested shares; prior open-market sales by an insider are disclosed.

The filing lists 32,363 Class A shares tied to RSUs/PSUs vesting on 03/01/2026, indicating the securities become available for sale through broker channels. The filing names Morgan Stanley Smith Barney LLC as the selling broker.

Reported prior dispositions include 9,838 shares on 12/11/2025 and 10,530 shares on 12/02/2025 by Sean Michael Walters; timing and routing of the proposed sales are not detailed in the excerpt.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the DDOG Form 144 disclose about shares being sold?

The filing discloses a proposed resale of 32,363 Class A shares tied to equity awards. It states the shares relate to RSUs and PSUs vesting on 03/01/2026, and Morgan Stanley Smith Barney LLC is listed as the selling broker.

Who previously sold shares in the past three months according to the filing?

The filing reports Sean Michael Walters sold 9,838 shares on 12/11/2025 and 10,530 shares on 12/02/2025. Each sale amount is shown alongside its transaction date in the excerpt.

Are the shares being sold from compensation awards or open‑market holdings?

The excerpt indicates the shares to be sold arise from Restricted Stock Units and Performance Stock Units vesting on 03/01/2026, identifying the source as compensation-related awards rather than previously held unrestricted shares.

How many shares outstanding does the filing show for DDOG?

The excerpt lists 328,274,648 shares outstanding as of 03/02/2026. This figure is presented in the filing content as the outstanding share count on that date.

Does the Form 144 confirm when the proposed sale will occur?

The filing identifies vesting on 03/01/2026 as the source date for the shares, but it does not specify exact execution dates or the detailed timing of the resale transactions in the provided excerpt.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/02/2026 - 04:53 PM EST Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001903980
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Datadog, Inc.
SEC File Number	001-39051
Address of Issuer	620 8th Avenue, 45th Floor New York NEW YORK 10018
Phone	866-329-4466
Name of Person for Whose Account the Securities are To Be Sold	Sean Michael Walters
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A Common Stock	Morgan Stanley Smith Barney LLC Executive Services 200 W Civic Center Dr - 4th Floor Sandy UT 84070	32363	3689382	328274648	03/02/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A Common Stock	03/01/2026	Restricted Stock Units and Performance Stock Units vesting	Issuer			32363	03/01/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Sean Michael Walters 620 8th Avenue, 45th floor New York NY 10018	Class A Common Stock	12/11/2025	9838	1474096.4
Sean Michael Walters 620 8th Avenue, 45th floor New York NY 10018	Class A Common Stock	12/02/2025	10530	1670042.20

144: Remarks and Signature

Remarks	Securities to be sold were registered on Form S-8
Date of Notice	03/02/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Sean Michael Walters
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)