Trusts sell large DDOG (NASDAQ: DDOG) Class A blocks under 10b5-1 plans

Rhea-AI Filing Summary

DDOG-related Form 144: Multiple block sales of Class A Common stock were reported under Rule 144/10b5-1 plans. The excerpt lists repeated 10b5-1 sales including 20,000 shares on 03/23/2026 for $2,547,238.00 and similar 20,000-share trades on prior March 2026 dates. Several January 2026 10b5-1 dispositions by related trusts show smaller blocks (5,548–11,111 shares) with gross proceeds listed in dollars.

Insights

Corporate Governance Analyst

Routine trust-directed 10b5-1 sales by insiders; administrative disclosure.

The filing lists multiple sales executed under 10b5-1 plans by named trusts and entities, showing share counts and gross dollar amounts for each transaction. These are structured dispositions rather than open-market ad hoc trades.

Timing and cash-flow treatment are explicit per sale rows; further context about remaining holdings or plan initiation dates is not present in the excerpt.

Key Figures

20,000-share sale: 20,000 shares Proceeds from 03/23/2026 sale: $2,547,238.00 20,000-share sale (03/16/2026): 20,000 shares +3 more

6 metrics

20,000-share sale 20,000 shares sold 03/23/2026

Proceeds from 03/23/2026 sale $2,547,238.00 gross proceeds listed for 20,000 shares on 03/23/2026

20,000-share sale (03/16/2026) 20,000 shares sold 03/16/2026

Proceeds from 03/16/2026 sale $2,534,672.00 gross proceeds listed for 20,000 shares on 03/16/2026

Smaller January blocks 5,548–11,111 shares multiple 10b5-1 sales dated 01/05–01/06/2026

Proceeds for 11,111-share sale $1,488,038.45 gross proceeds listed for 11,111 shares on 01/05/2026

Key Terms

10b5-1 Sales, Class A Common, Previously Exercised Stock Options

3 terms

10b5-1 Sales regulatory

"10b5-1 Sales for AGARWAL 2018 FAMILY TRUST 620 8th Avenue"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Class A Common market

"Class A Common | Morgan Stanley Smith Barney LLC Executive Financial Services"

Previously Exercised Stock Options financial

"Previously Exercised Stock Options | Issuer | 20000 | 04/07/2021 | Cash"

FAQ

What did DDOG insiders sell according to this Form 144?

The filing lists Class A Common stock sold under 10b5-1 plans, including 20,000 shares on 03/23/2026 for $2,547,238.00. It itemizes multiple dated sales with share counts and gross proceeds for each transaction.

Were the DDOG sales part of 10b5-1 trading plans?

Yes. The excerpt repeatedly labels transactions as 10b5-1 Sales, indicating sales were executed pursuant to pre-established trading plans. Each sale row shows the plan-holder name, date, share count, and gross proceeds in dollars.

Which entities executed the reported DDOG dispositions?

The excerpt names trusts such as AGARWAL 2018 FAMILY TRUST and several labeled 2025 non-exempt trusts. Each entity is listed alongside the Class A Common sale dates, share quantities, and sale proceeds in dollars.

What sale amounts and dates appear for the largest reported blocks?

Notable entries include 20,000 shares sold on 03/23/2026 for $2,547,238.00 and 20,000 shares on 03/16/2026 for $2,534,672.00. Multiple similar 20,000-share trades appear in March 2026.

Does the excerpt state who received the sale proceeds?

The rows show gross dollar amounts for each sale but do not state the recipient party for proceeds beyond the named trust or plan. Cash-flow attribution beyond the listed trust names is not provided in the excerpt.

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

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Accepted by SEC EDGAR 04/01/2026 - 04:43 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	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	AGARWAL 2018 FAMILY 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	Director

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	2361000.00	328274648	04/01/2026	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 *
Common	04/07/2021	Previously Exercised Stock 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	03/23/2026	20000	2547238.00
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	The securities to be sold were acquired upon the previous exercise of stock options during the period of 04/07/2021 through 07/14/2021. Securities to be sold, acquired through RSU/PSU or upon option exercise, were registered on Form S-8.
Date of Notice	04/01/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/08/2025
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/ Ellen Jan
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)