Datadog officer plans sale of 11,710 shares

Datadog officer Sean Walters filed a Form 144 indicating intent to sell 11,710 Class A shares, following a recent sale of 13,575 shares.

Rhea-AI Filing Summary

Datadog, Inc. (DDOG) is the issuer for which officer Sean Walters filed a Form 144 notice of proposed sale. The notice covers the planned sale of 11,710 shares of Class A Common Stock, to be sold through Morgan Stanley Smith Barney LLC. The securities are to be sold on or after September 1, 2026 and were acquired through RSU/PSU awards or upon option exercise, and were previously registered on Form S-8. The filing also reports that Walters sold 13,575 shares of common stock during the prior three months, with a reported value of $2,890,170.44.

Key Figures

Shares to be sold: 11,710 shares of Class A Common Stock Reported value of planned sale: $2,596,341.20 Shares sold in past 3 months: 13,575 shares +2 more

5 metrics

Shares to be sold 11,710 shares of Class A Common Stock Planned sale by Sean Walters on or after September 1, 2026

Reported value of planned sale $2,596,341.20 Value associated with the 11,710 shares in the Form 144 securities information section

Shares sold in past 3 months 13,575 shares Common stock sold by Sean Walters on September 2, 2026

Value of shares sold in past 3 months $2,890,170.44 Reported total value of 13,575 shares sold on September 2, 2026

Date of Form 144 notice September 11, 2026 Date of Notice signed by Sean Walters

Key Terms

Rule 144, Form S-8, RSU/PSU, option exercise

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Form S-8 regulatory

"were registered on Form S-8."

A Form S-8 is a U.S. Securities and Exchange Commission registration that lets a public company set aside shares for employee benefit plans and stock-based compensation. Think of it as opening a dedicated account that authorizes the company to issue or reserve stock for workers and directors; it matters to investors because it enables share dilution when those awards are granted or exercised and signals how management is compensated and incentivized.

RSU/PSU financial

"Securities to be sold, acquired through RSU/PSU or upon option exercise"

option exercise financial

"acquired through RSU/PSU or upon option exercise, were registered"

FAQ

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

What does the Form 144 filing for DDOG by Sean Walters disclose?

It discloses that officer Sean Walters has filed a Form 144 indicating an intent to sell 11,710 shares of Datadog Class A Common Stock, with the shares to be sold on or after September 1, 2026, through Morgan Stanley Smith Barney LLC.

How many Datadog (DDOG) shares is Sean Walters planning to sell?

The filing states that Sean Walters plans to sell 11,710 shares of Datadog Class A Common Stock. These shares are expected to be sold on or after September 1, 2026 and will be handled by Morgan Stanley Smith Barney LLC Executive Financial Services.

What type of Datadog (DDOG) securities are covered in this Form 144?

The notice covers Class A Common Stock of Datadog, Inc. The securities to be sold were acquired through RSU/PSU awards or upon option exercise, and the filing notes that they were registered on Form S-8.

What prior Datadog (DDOG) share sales by Sean Walters are reported?

The Form 144 reports that Sean Walters sold 13,575 shares of Datadog common stock on September 2, 2026, with a reported total value of $2,890,170.44 over the past three months from the notice date.

When was the Form 144 notice for Datadog (DDOG) filed by Sean Walters?

The Date of Notice in the Form 144 is September 11, 2026. The filing relates to a planned sale of 11,710 Datadog Class A shares on or after September 1, 2026 and references a prior sale on September 2, 2026.

Through which broker will Sean Walters sell his Datadog (DDOG) shares?

The Form 144 lists Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY, as the broker handling the sale of the 11,710 Class A Common shares.

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

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Available on EDGAR 09/11/2026 - 04:32 PM Accepted by SEC EDGAR 09/11/2026 - 04:31 PM 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	8663294466
Name of Person for Whose Account the Securities are To Be Sold	Sean 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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	11710	2596341.20	334904614	09/11/2026	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	09/01/2026	RSU/PSU	Issuer			11710	09/01/2026	N/A

* 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 WALTERS 620 8th Avenue, 45th Floor New York NY 10018	Common	09/02/2026	13575	2890170.44

144: Remarks and Signature

Remarks	Securities to be sold, acquired through RSU/PSU or upon option exercise, were registered on Form S-8.
Date of Notice	09/11/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/12/2025
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 Walters
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)