Datadog (DDOG) COO offloads 65,521 shares under 10b5-1 tax sale plan

Rhea-AI Filing Summary

Datadog, Inc. Chief Operating Officer Adam Blitzer reported open-market sales of 65,521 shares of Class A common stock on March 2–3, 2026. The sales were executed at weighted-average prices generally ranging from about $105.31 to $113.86, across multiple transaction blocks.

According to the disclosure, Datadog required Blitzer to sell only the number of shares needed to cover tax withholding obligations tied to the vesting of restricted stock units and performance-based restricted stock units, plus related commissions. The transactions were carried out under a pre-arranged Rule 10b5-1 trading plan dated August 22, 2025. After these sales, he directly held 230,320 shares of Datadog Class A common stock.

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

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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^*

Blitzer Adam

(Last) (First) (Middle)

C/O DATADOG, INC.

620 8TH AVENUE, 45TH FLOOR

(Street)

NEW YORK NY 10018

(City) (State) (Zip)

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 Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

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

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

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

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	03/02/2026		S(1)		33,429	D	$110.5359(2)	262,412	D
Class A Common Stock	03/03/2026		S(3)		3,600	D	$105.9606(4)	258,812	D
Class A Common Stock	03/03/2026		S(3)		4,500	D	$106.7676(5)	254,312	D
Class A Common Stock	03/03/2026		S(3)		1,560	D	$107.671(6)	252,752	D
Class A Common Stock	03/03/2026		S(3)		600	D	$109.1081(7)	252,152	D
Class A Common Stock	03/03/2026		S(3)		2,984	D	$110.4384(8)	249,168	D
Class A Common Stock	03/03/2026		S(3)		3,600	D	$111.4319(9)	245,568	D
Class A Common Stock	03/03/2026		S(3)		13,048	D	$112.1032(10)	232,520	D
Class A Common Stock	03/03/2026		S(3)		2,000	D	$113.1842(11)	230,520	D
Class A Common Stock	03/03/2026		S(3)		200	D	$113.8252(12)	230,320	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. The Reporting Person was required by the Issuer to sell only the number of shares of common stock necessary to cover applicable tax withholding obligations realized upon the vesting of restricted stock units and performance-based restricted stock units, as well as any related brokerage commission fees.

2. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $110.53 to $111.78. 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. Shares sold pursuant to a 10b5-1 plan dated August 22, 2025.

4. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $105.31 to $106.30. 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 $106.33 to $107.24. 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 $107.37 to $108.23. 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.

7. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $108.70 to $109.31. 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.

8. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $109.74 to $110.73. 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.

9. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $110.76 to $111.75. 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.

10. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $111.76 to $112.75. 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.

11. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $112.78 to $113.77. 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.

12. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $113.81 to $113.86. 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	03/04/2026
	** 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.

FAQ

What did Datadog (DDOG) COO Adam Blitzer report in this Form 4?

Adam Blitzer reported selling 65,521 shares of Datadog Class A common stock in open-market transactions. These trades occurred on March 2–3, 2026 under a pre-set Rule 10b5-1 plan and were linked to tax obligations from vested restricted stock units.

How many Datadog (DDOG) shares does the COO hold after these transactions?

After the reported sales, Adam Blitzer directly held 230,320 shares of Datadog Class A common stock. This post-transaction holding figure comes from the filing’s ownership totals and reflects his remaining direct equity stake following the March 2026 trades.

Why was the Datadog (DDOG) COO required to sell shares in this filing?

The company required Adam Blitzer to sell shares only to cover applicable tax withholding obligations. Those obligations arose from the vesting of restricted stock units and performance-based restricted stock units, as well as related brokerage commission fees associated with satisfying those tax liabilities.

Were the Datadog (DDOG) COO’s share sales part of a 10b5-1 trading plan?

Yes, the filing states the shares were sold pursuant to a Rule 10b5-1 trading plan. That plan was dated August 22, 2025, indicating the trades followed a pre-arranged schedule rather than being discretionary same-day decisions by the executive.

At what prices did the Datadog (DDOG) COO sell his shares?

The Form 4 reports weighted-average sales prices, with shares sold in ranges. Footnotes state the sales prices generally ranged from $105.31 to $113.86 per share, with detailed breakdowns available upon request from the company, the SEC, or security holders.

How many individual transactions did the Datadog (DDOG) Form 4 include?

The disclosure lists ten separate non-derivative transactions in Class A common stock. All were coded as open-market sales, with different share sizes and price ranges, and together they sum to the 65,521 total shares sold by Adam Blitzer in early March 2026.