Insider plans sale of 5,551 DDOG Class A shares

A Form 144 notice discloses a planned sale of 5,551 shares of Class A Common stock through Morgan Stanley Smith Barney LLC, with an aggregate market value of 741,835.64.

Rhea-AI Filing Summary

A Form 144 notice discloses a planned sale of 5,551 shares of Class A Common stock through Morgan Stanley Smith Barney LLC, with an aggregate market value of 741,835.64. The issuer has 325,443,373 shares outstanding, giving context for the relative size of this proposed sale. The shares to be sold were acquired as a gift on 09/12/2025 from the Agarwal 2018 Family Trust, which originally acquired them on 04/07/2021. Over the past three months, related 10b5-1 trusts have sold blocks of Class A Common, including 11,111 shares on 01/05/2026 for gross proceeds of 1,488,038.45 and 11,112 shares on 12/16/2025 for 1,560,263.70. The signer represents they are not aware of undisclosed material adverse information about the issuer.

FAQ

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What does the DDOG Form 144 filing disclose?

The Form 144 notice discloses a planned sale of 5,551 shares of Class A Common stock through Morgan Stanley Smith Barney LLC, with an aggregate market value of 741,835.64. It also lists prior 10b5-1 trust sales over the past three months.

How many DDOG shares are planned to be sold under this Form 144?

The notice covers a proposed sale of 5,551 shares of Class A Common stock, with an aggregate market value of 741,835.64, to be sold on or around 01/06/2026 on NASDAQ.

How many DDOG shares are reported as outstanding in this Form 144?

The filing states that there are 325,443,373 shares of the issuer’s Class A Common stock outstanding, providing context for the relative scale of the planned 5,551-share sale.

How were the DDOG shares in this Form 144 acquired?

The 5,551 shares covered by this notice were acquired as a gift on 09/12/2025 from the Agarwal 2018 Family Trust, which originally acquired the securities on 04/07/2021.

What recent 10b5-1 sales related to DDOG are listed in the Form 144?

The document lists multiple Rule 10b5-1 plan sales by 2025 non-exempt trusts, including blocks of 11,111 shares of Class A Common on 01/05/2026 with gross proceeds such as 1,488,038.45, and 11,112 shares on 12/16/2025 with gross proceeds like 1,560,263.70.

What representation does the seller make in this DDOG Form 144?

The person for whose account the securities are to be sold represents by signing that they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed.

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Accepted by SEC EDGAR 01/06/2026 - 04:28 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	0001540517
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	A-J-M 2025 NON-EXEMPT TRUST
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	Affiliate

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	5551	741835.64	325443373	01/06/2026	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	09/12/2025	Gift	Agarwal 2018 Family Trust		04/07/2021	5551		NA

* 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 for A-J-M 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	01/05/2026	11111	1488038.45
10b5-1 Sales for A-J-K 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	01/05/2026	11111	1488052.90
10b5-1 Sales for A-J-I 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	01/05/2026	11111	1488027.34
10b5-1 Sales for A-J-M 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/22/2025	11111	1580679.75
10b5-1 Sales for A-J-K 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/22/2025	11111	1580754.19
10b5-1 Sales for A-J-I 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/22/2025	11111	1580766.41
10b5-1 Sales for A-J-M 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/19/2025	11111	1555556.67
10b5-1 Sales for A-J-K 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/19/2025	11111	1555774.44
10b5-1 Sales for A-J-I 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/19/2025	11111	1555735.55
10b5-1 Sales for A-J-M 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/18/2025	11111	1541015.70
10b5-1 Sales for A-J-K 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/18/2025	11111	1541076.81
10b5-1 Sales for A-J-I 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/18/2025	11111	1541119.03
10b5-1 Sales for A-J-M 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/17/2025	11111	1532701.34
10b5-1 Sales for A-J-K 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/17/2025	11111	1532560.23
10b5-1 Sales for A-J-I 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/17/2025	11111	1532616.90
10b5-1 Sales for A-J-M 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/16/2025	11112	1560263.70
10b5-1 Sales for A-J-K 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/16/2025	11112	1560055.91
10b5-1 Sales for A-J-I 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	12/16/2025	11112	1560430.38

144: Remarks and Signature

Remarks	The shares to be sold pursuant to this Form are held by trusts set up for the benefit of the family of Amit Agarwal, a member of the board of directors of Datadog, Inc. The disposition of these shares is controlled by an independent trustee. The shares were acquired by the donor during the period 04/07/2021 through 07/14/2021.
Date of Notice	01/06/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/15/2025
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/ Brian Cyr
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)