Datadog (DDOG) Chief People Officer sells 4,013 shares under 10b5-1 plan

Rhea-AI Filing Summary

Datadog, Inc. Chief People Officer David Galloreese reported an open-market sale of Class A Common Stock. On June 9, 2026, he sold 4,013 shares at a weighted-average price of $228.9036 per share. The transaction was executed under a 10b5-1 trading plan dated March 6, 2026, indicating it was pre-arranged. Following this sale, Galloreese directly holds 122,191 shares of Datadog Class A Common Stock.

Insider Trade Summary 10b5-1

Net Seller: 4,013 shares ($918,590)

Net Sell 1 txn

Insider Galloreese David

Role Chief People Officer

Sold 4,013 shs ($919K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	4,013	$228.9036	$919K

Holdings After Transaction: Class A Common Stock — 122,191 shares (Direct, null)

Footnotes (1)

1. Shares sold pursuant to a 10b5-1 plan dated March 6, 2026. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $228.16 to $229.90. 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

Shares sold: 4,013 shares Weighted-average sale price: $228.9036 per share Sale price range: $228.16–$229.90 per share +2 more

5 metrics

Shares sold 4,013 shares Open-market sale on June 9, 2026

Weighted-average sale price $228.9036 per share Class A Common Stock sale

Sale price range $228.16–$229.90 per share Range of prices for reported trades

Shares owned after sale 122,191 shares Direct holdings following transaction

10b5-1 plan date March 6, 2026 Plan governing the reported sale

Key Terms

10b5-1 plan, weighted-average sales price, Class A Common Stock, open-market sale

4 terms

10b5-1 plan regulatory

"Shares sold pursuant to a 10b5-1 plan dated March 6, 2026."

A 10b5-1 plan is a pre-arranged strategy that allows company insiders to buy or sell their shares at predetermined times and prices, even while they are aware of confidential information. It acts like a scheduled appointment for trading, helping ensure transactions happen transparently and legally, which can reassure investors that trades are not based on insider knowledge.

weighted-average sales price financial

"Price reported is a weighted-average sales price."

Class A Common Stock financial

"security_title: Class A Common Stock"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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Form 4 Insider Transactions: What Each Field Means →

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^*

Galloreese David

(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 People Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/09/2026

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	06/09/2026		S(1)		4,013	D	$228.9036(2)	122,191	D

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 March 6, 2026.

2. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $228.16 to $229.90. 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	06/11/2026
	** 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)

FAQ

What insider transaction did Datadog (DDOG) report for David Galloreese?

Datadog reported that Chief People Officer David Galloreese sold shares of Class A Common Stock. He completed an open-market sale of 4,013 shares on June 9, 2026, as disclosed in a Form 4 insider trading report.

How many Datadog (DDOG) shares did David Galloreese sell and at what price?

David Galloreese sold 4,013 shares of Datadog Class A Common Stock. The shares were sold at a weighted-average price of $228.9036 per share, with individual sale prices ranging from $228.16 to $229.90 according to the filing.

How many Datadog (DDOG) shares does David Galloreese hold after this sale?

After the reported sale, David Galloreese directly holds 122,191 shares of Datadog Class A Common Stock. This figure reflects his post-transaction ownership as shown in the Form 4 and provides context for the size of the 4,013-share sale.

Was David Galloreese’s Datadog (DDOG) share sale under a 10b5-1 plan?

Yes. The filing states the shares were sold pursuant to a 10b5-1 plan dated March 6, 2026. Such plans are pre-arranged trading programs that allow insiders to systematically sell shares according to preset instructions.

What price range applied to David Galloreese’s Datadog (DDOG) share sale?

The Form 4 notes a weighted-average sales price, with shares sold between $228.16 and $229.90. The insider committed to provide detailed trade breakdowns upon request to the SEC, Datadog, or any security holder.

Did David Galloreese exercise any Datadog (DDOG) stock options in this filing?

No. The reported activity involves only a non-derivative open-market sale of Class A Common Stock. The derivative section in the filing is empty, indicating there were no option exercises or other derivative transactions disclosed in this particular Form 4.