DDOG Form 144: Founder plans sale of 25,620 Class A shares

Rhea-AI Filing Summary

Datadog, Inc. insider notice reports a proposed sale of 25,620 Class A common shares through Morgan Stanley Smith Barney LLC with an aggregate market value of $3,958,802.40. The filing lists 323,270,704 shares outstanding and an approximate sale date of 10/08/2025 on NASDAQ. The shares were originally acquired as founders shares on 07/08/2010.

The filing also discloses multiple recent sales by the same person under 10b5-1 plans between 07/28/2025 and 10/07/2025, showing continuing orderly dispositions. The filer certifies no undisclosed material adverse information and notes reliance on Rule 10b5-1 where applicable.

Positive

• Sale executed via 10b5-1 plan and registered broker, indicating preplanned, compliant disposition
• Seller acquired shares as founders shares on 07/08/2010, showing long-term ownership prior to sale

Negative

• Insider is selling equity with an aggregate market value of $3,958,802.40, which investors may view as a liquidity event
• Multiple recent sales under 10b5-1 plans between 07/28/2025 and 10/07/2025, indicating continuing dispositions

Insights

Insider Transactions Specialist

TL;DR: Scheduled sale is orderly and uses a broker/10b5-1 plan.

The notice records a proposed disposal of 25,620 Class A shares for $3,958,802.40 via Morgan Stanley Smith Barney LLC. The shares were acquired as founders shares on 07/08/2010, and the filing explicitly references prior 10b5-1 plan sales in recent months.

Use of a broker and repeated 10b5-1 entries indicate pre‑planned, rule‑compliant dispositions rather than ad hoc trades. Monitor whether future filings continue this pattern; changes in frequency or size versus prior 10b5-1 disclosures would be the most direct compliance signal within the next 3 months.

Equity Markets Analyst

TL;DR: Sale size is modest relative to total shares outstanding.

The proposed sale of 25,620 shares is set against a reported share count of 323,270,704 outstanding and recent multiple disposals listed in the filing. The filing shows gross proceeds from prior 10b5-1 sales across late 2025, indicating ongoing liquidity actions by the seller.

For market impact, observe volume on 10/08/2025 and subsequent Form 4/Form 144 entries; material price or volume effects would appear immediately around those trades but the single line item here suggests limited direct market pressure absent much larger follow-on sales.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

Relationship to Issuer

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	25620	3958802.40	323270704	10/08/2025	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 *
Common	07/08/2010	Founders Shares	Issuer			25620	07/08/2010	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
10b5-1 Sales Plan for OLIVIER POMEL 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	10/07/2025	21728	3355359.44
10b5-1 Sales Plan for OLIVIER POMEL 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	10/07/2025	11195	1728794.59
10b5-1 Sales Plan for OLIVIER POMEL 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	09/23/2025	11195	1544269.65
10b5-1 Sales Plan for OLIVIER POMEL 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	09/08/2025	21728	2950308.23
10b5-1 Sales Plan for OLIVIER POMEL 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	09/08/2025	11195	1518540.18
OLIVIER POMEL 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	09/02/2025	15357	2055491.45
10b5-1 Sales Plan for OLIVIER POMEL 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	08/27/2025	11195	1455350.00
10b5-1 Sales Plan for OLIVIER POMEL 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	08/11/2025	21728	2827234.32
10b5-1 Sales Plan for OLIVIER POMEL 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	08/11/2025	11195	1465101.96
10b5-1 Sales Plan for OLIVIER POMEL 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	07/28/2025	11195	1688462.37

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the Form 144 for DDOG report?

The filing reports a proposed sale of 25,620 Class A shares valued at $3,958,802.40, with an approximate sale date of 10/08/2025 on NASDAQ.

Who is selling the shares in the DDOG Form 144?

The filer is a person associated with the issuer who originally acquired the shares as founders shares on 07/08/2010. Prior sales are listed under 10b5-1 plans for Olivier Pomel.

Were the sales part of a 10b5-1 trading plan?

Yes. The filing lists multiple entries described as 10b5-1 Sales Plan for recent transactions, and the form includes the plan adoption/instruction representation.

How many shares are outstanding according to the filing?

The filing reports 323,270,704 shares outstanding.

Who is the broker handling the proposed sale?

The broker named is Morgan Stanley Smith Barney LLC, located at 1 New York Plaza, 8th Floor, New York, NY.