Form 144: Proposed sale of DDOG Class A shares

Sean Michael Walters submitted notices of proposed sales under Form 144 for Class A Common Stock.

Rhea-AI Filing Summary

Sean Michael Walters submitted notices of proposed sales under Form 144 for Class A Common Stock. The filing lists multiple transactions with specific sale dates, share counts and dollar amounts: 05/07/2026 — 7,657 shares for $1,443,344.5; 05/05/2026 — 1,914 shares for $287,100; 03/11/2026 — 22,330 shares for $2,806,479.06; 03/02/2026 — 32,118 shares for $3,550,192.04.

The filing also lists securities to be sold tied to Restricted Stock Units and Performance Stock Units vesting on 06/01/2026, and references an entity at Morgan Stanley Smith Barney LLC. A headline context figure of 330,825,798 is shown with date 06/02/2026.

Insights

Securities Counsel

Form 144 notices record proposed sales of vested equity by a reporting person.

These entries itemize proposed dispositions by Sean Michael Walters with exact share counts and dollar figures on four dates between 03/02/2026 and 05/07/2026. The filing also notes planned distributions from Restricted Stock Units and Performance Stock Units vesting on 06/01/2026.

The listed figures should be viewed as notice information filed under resale rules; timing and execution of actual sales depend on market transactions and any broker handling. Subsequent public reports or broker confirmations will show whether these proposed sales were executed.

Key Figures

Shares proposed for sale (03/02/2026): 32,118 shares Proceeds listed (03/02/2026): $3,550,192.04 Shares proposed for sale (03/11/2026): 22,330 shares +6 more

9 metrics

Shares proposed for sale (03/02/2026) 32,118 shares proposed disposition listed with date <date>03/02/2026</date>

Proceeds listed (03/02/2026) <money>$3,550,192.04</money> associated with the 32,118-share line on <date>03/02/2026</date>

Shares proposed for sale (03/11/2026) 22,330 shares proposed disposition listed with date <date>03/11/2026</date>

Proceeds listed (03/11/2026) <money>$2,806,479.06</money> associated with the 22,330-share line on <date>03/11/2026</date>

Shares proposed for sale (05/07/2026) 7,657 shares proposed disposition listed with date <date>05/07/2026</date>

Proceeds listed (05/07/2026) <money>$1,443,344.5</money> associated with the 7,657-share line on <date>05/07/2026</date>

Shares proposed for sale (05/05/2026) 1,914 shares proposed disposition listed with date <date>05/05/2026</date>

Proceeds listed (05/05/2026) <money>$287,100</money> associated with the 1,914-share line on <date>05/05/2026</date>

Headline figure shown 330,825,798 numeric figure presented with date <date>06/02/2026</date>

Key Terms

Form 144, Restricted Stock Units, Performance Stock Units, Morgan Stanley Smith Barney LLC

4 terms

Form 144 regulatory

"144: Securities Sold During The Past 3 Months"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock Units financial

"Restricted Stock Units and Performance Stock Units vesting"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Performance Stock Units financial

"Restricted Stock Units and Performance Stock Units vesting"

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

Morgan Stanley Smith Barney LLC other

"Morgan Stanley Smith Barney LLC Executive Services 200 W Civic Center Dr"

FAQ

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

What does the DDOG Form 144 by Sean Michael Walters report?

It reports proposed sales of Class A Common Stock by Sean Michael Walters. The filing lists four proposed dispositions totaling specific share counts and proceeds across dates in March–May 2026, and notes RSUs/PSUs vesting on 06/01/2026.

How many shares and proceeds are listed in the DDOG Form 144 transactions?

The filing lists four transactions: 32,118, 22,330, 7,657, and 1,914 shares. Associated dollar amounts shown are $3,550,192.04, $2,806,479.06, $1,443,344.5, and $287,100 respectively.

Are the sales tied to equity awards or compensation for DDOG?

Yes. The filing explicitly ties planned sales to Restricted Stock Units and Performance Stock Units vesting on 06/01/2026. The notice identifies the sale method as compensation-related vesting rather than an open-market grant.

Does the Form 144 confirm these sales were executed for DDOG shares?

No. Form 144 provides notice of proposed sales rather than proof of execution. Execution and settlement details are not included; broker trade confirmations or later SEC filings would confirm completed transactions.

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

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Accepted by SEC EDGAR 06/02/2026 - 04:49 PM EDT 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	13169	3094715	330825798	06/02/2026	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	06/01/2026	Restricted Stock Units and Performance Stock Units vesting	Issuer			13169	06/01/2026	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	05/07/2026	7657	1443344.5
Sean Michael Walters 620 8th Avenue, 45th floor New York NY 10018	Class A Common Stock	05/05/2026	1914	287100
Sean Michael Walters 620 8th Avenue, 45th floor New York NY 10018	Class A Common Stock	03/11/2026	22330	2806479.06
Sean Michael Walters 620 8th Avenue, 45th floor New York NY 10018	Class A Common Stock	03/02/2026	32118	3550192.04

144: Remarks and Signature

Remarks	Securities to be sold were registered on Form S-8
Date of Notice	06/02/2026
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)