Datadog CRO sells 11,710 shares in trading plan

Datadog’s chief revenue officer disclosed planned open-market sales of 11,710 shares under a Rule 10b5-1 trading plan.

Rhea-AI Filing Summary

Datadog, Inc. (DDOG) reported that Chief Revenue Officer Sean Michael Walters sold a total of 11,710 shares of Class A Common Stock on September 11, 2026 in open-market transactions. The sales were made pursuant to a Rule 10b5-1 trading plan dated December 12, 2025, at weighted-average prices ranging from about $219.13 to $224.86 per share across several price buckets. Walters also reports indirect ownership of 8 shares held by his son.

Insider Trade Summary 10b5-1

Net Seller: 11,710 shares

Net Sell 6 txns

Insider Walters Sean Michael

Role Chief Revenue Officer

Sold 11,710 shs ($2.59M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2	800	$219.6846	$176K
Sale	Class A Common Stock F1, F3	5,824	$220.6722	$1.29M
Sale	Class A Common Stock F1, F4	4,286	$221.4015	$949K
Sale	Class A Common Stock F1, F5	500	$222.3125	$111K
Sale	Class A Common Stock F1, F6	300	$224.4533	$67K
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Class A Common Stock — 233,135 shares (Direct); Class A Common Stock — 8 shares (Indirect, By Son)

Footnotes (6)

1. F1. Shares sold pursuant to a 10b5-1 plan dated December 12, 2025.
2. F2. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $219.13 to $220.08. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
3. F3. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $220.18 to $221.17. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
4. F4. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $221.19 to $221.89. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
5. F5. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $222.20 to $222.45. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
6. F6. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $224.13 to $224.86. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

Key Figures

Total shares sold: 11,710 shares First tranche size and price: 800 shares at $219.6846 per share Largest tranche size and price: 5,824 shares at $220.6722 per share +4 more

7 metrics

Total shares sold 11,710 shares Aggregate Class A Common Stock sales on September 11, 2026

First tranche size and price 800 shares at $219.6846 per share Open-market sale of Class A Common Stock on September 11, 2026

Largest tranche size and price 5,824 shares at $220.6722 per share Open-market sale of Class A Common Stock on September 11, 2026

Additional tranches and prices 4,286 shares at $221.4015; 500 at $222.3125; 300 at $224.4533 Further open-market sales on September 11, 2026

Trading price ranges $219.13–$224.86 per share Weighted-average sales price ranges across all transactions

Rule 10b5-1 plan adoption date December 12, 2025 Plan under which the September 11, 2026 sales were made

Indirect holdings 8 shares Class A Common Stock held indirectly "By Son" as of September 11, 2026

Key Terms

Rule 10b5-1 plan, weighted-average sales price, open market or private transaction, indirect ownership

4 terms

Rule 10b5-1 plan regulatory

"Shares sold pursuant to a 10b5-1 plan dated December 12, 2025"

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

weighted-average sales price financial

"Price reported is a weighted-average sales price"

open market or private transaction financial

"Sale in open market or private transaction"

indirect ownership financial

"Ownership type reported as indirect "By Son""

FAQ

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

How many Datadog (DDOG) shares did Sean Michael Walters sell?

Sean Michael Walters reported selling a total of 11,710 shares of Datadog Class A Common Stock on September 11, 2026 in a series of open-market transactions.

At what prices were the Datadog (DDOG) shares sold in this Form 4?

The reported prices are weighted-average sales prices. The shares were sold in ranges from $219.13–$220.08, $220.18–$221.17, $221.19–$221.89, $222.20–$222.45, and $224.13–$224.86 per share, depending on the specific transaction group.

Was the Datadog (DDOG) insider sale made under a Rule 10b5-1 plan?

Yes. The filing states the shares were sold pursuant to a Rule 10b5-1 plan dated December 12, 2025, indicating the trades were pre-arranged under that trading plan.

What individual trade sizes did the Datadog (DDOG) CRO report?

The Form 4 reports five sale tranches of 800, 5,824, 4,286, 500, and 300 shares of Datadog Class A Common Stock, all dated September 11, 2026, each with its own weighted-average price range.

Does Sean Michael Walters still hold Datadog (DDOG) shares after these sales?

The filing reports indirect ownership of 8 shares of Class A Common Stock held "By Son." The document does not state a total remaining direct share balance after the reported sales.

What role does Sean Michael Walters hold at Datadog (DDOG)?

Sean Michael Walters is identified in the filing as Datadog’s Chief Revenue Officer, and the reported transactions involve sales of the company’s Class A Common Stock.

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

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Available on EDGAR 09/15/2026 - 04:38 PM Accepted by SEC EDGAR 09/15/2026 - 04:38 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Walters Sean Michael

(Last) (First) (Middle)

C/O DATADOG, INC.

620 8TH AVENUE, 45TH FLOOR

(Street)

NEW YORK NEW YORK 10018

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Datadog, Inc. [ DDOG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Revenue Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	09/11/2026		S(1)		800	D	$219.6846(2)	244,045	D
Class A Common Stock	09/11/2026		S(1)		5,824	D	$220.6722(3)	238,221	D
Class A Common Stock	09/11/2026		S(1)		4,286	D	$221.4015(4)	233,935	D
Class A Common Stock	09/11/2026		S(1)		500	D	$222.3125(5)	233,435	D
Class A Common Stock	09/11/2026		S(1)		300	D	$224.4533(6)	233,135	D
Class A Common Stock								8	I	By Son

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares sold pursuant to a 10b5-1 plan dated December 12, 2025.

2. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $219.13 to $220.08. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

3. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $220.18 to $221.17. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

4. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $221.19 to $221.89. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

5. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $222.20 to $222.45. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

6. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $224.13 to $224.86. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

Remarks:

	/s/ Kerry Acocella, Attorney-in-Fact	09/15/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)