Multiple 10b5-1 trust sales of Datadog (NASDAQ: DDOG) reported

Rhea-AI Filing Summary

Datadog resale activity was reported on a Form 144: multiple Class A Common share sales executed under 10b5-1 plans by family trusts and related trusts. Examples include sales of 20,000 shares on 03/16/2026 for $2,534,672.00 and 20,000 shares on 03/09/2026 for $2,496,116.00. The filing also lists January 2026 10b5-1 sales, including 11,111 shares on 01/05/2026 for $1,488,038.45 and several ~5,551 share sales on 01/06/2026 with proceeds near $746,937.56.

Insights

Corporate Governance Analyst

Multiple trust-led 10b5-1 sales of Class A shares were reported, showing routine liquidity activity.

The excerpt lists specific trust sales executed under 10b5-1 plans on 01/05/2026, 01/06/2026, 03/09/2026, and 03/16/2026

These entries identify selling parties as family or non-exempt trusts and show per-sale share counts and gross proceeds. Cash-flow treatment (who receives proceeds) and any remaining trust holdings are not stated in the excerpt; subsequent filings may provide fuller position context.

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

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	20000	2501600.00	328274648	03/23/2026	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	04/07/2021	Previously Exercised Options	Issuer			20000	04/07/2021	Cash

* 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 AGARWAL 2018 FAMILY TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	03/16/2026	20000	2534672.00
10b5-1 Sales for AGARWAL 2018 FAMILY TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	03/09/2026	20000	2496116.00
10b5-1 Sales for A-J-M 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	01/06/2026	5551	746937.56
10b5-1 Sales for A-J-K 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	01/06/2026	5551	746834.32
10b5-1 Sales for A-J-I 2025 NON-EXEMPT TRUST 620 8th Avenue, 45th Floor New York NY 10018	Class A Common	01/06/2026	5548	746554.97
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

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 insider sales did DDOG report on Form 144?

The filing shows multiple trust-led sales of Class A Common shares under 10b5-1 plans. Examples include 20,000 shares on 03/16/2026 for $2,534,672.00 and 20,000 shares on 03/09/2026 for $2,496,116.00.

Who executed the sales reported in the DDOG Form 144?

Sales were executed by family and related trusts (e.g., AGARWAL 2018 FAMILY TRUST, A-J-M/A-J-K/A-J-I 2025 trusts) under 10b5-1 plans. The excerpt lists trust names and addresses as the selling parties for each transaction.

What are example proceeds and sizes from the reported DDOG sales?

Examples in the filing include 11,111 shares on 01/05/2026 for $1,488,038.45 and 5,551 shares on 01/06/2026 for $746,937.56, showing per-trade gross proceeds reported in the excerpt.

Were the DDOG sales executed under a trading plan?

Yes. The excerpt explicitly labels the transactions as 10b5-1 Sales, indicating they were executed pursuant to pre-established trading plans for the named trusts on the listed dates.

Does the filing state how many shares remain owned after these sales?

The provided excerpt does not state post-sale holdings or total shares outstanding. The Form 144 entries list per-trade quantities and proceeds but do not disclose remaining trust positions in the excerpt.