Datadog (DDOG) director Julie Richardson sells 4,363 shares in planned trades

Rhea-AI Filing Summary

Datadog, Inc. director Julie Richardson reported selling Class A Common Stock in two open-market transactions. She sold 2433 shares at $188.50 per share on May 7, 2026, and 1930 shares at $185.82 per share on May 8, 2026, totaling 4363 shares.

After these trades, she directly holds 4036 shares and then 2106 shares, as reported following each respective transaction. The sales were executed under a Rule 10b5-1 trading plan dated November 7, 2025, indicating they were pre-arranged. The filing also corrects an earlier error where 2301 shares had been reported as gifted in December 2021, a transfer that did not occur, and it updates prior reported beneficial ownership accordingly.

Insider Trade Summary 10b5-1

Net Seller: 4,363 shares ($817,253)

Net Sell 2 txns

Insider Richardson Julie

Role null

Sold 4,363 shs ($817K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	1,930	$185.82	$359K
Sale	Class A Common Stock	2,433	$188.50	$459K

Holdings After Transaction: Class A Common Stock — 2,106 shares (Direct, null)

Footnotes (1)

1. Shares sold pursuant to a 10b5-1 plan dated November 7, 2025. The balance reported reflects a correction of 2,301 shares reported as gifted on December 10, 2021, which did not occur. This Form 4 is also deemed to amend and restate the number of shares reported as beneficially owned on each Form 4 filed on or after December 10, 2021.

Key Figures

Total shares sold: 4363 shares Sale price May 7, 2026: $188.50 per share Sale price May 8, 2026: $185.82 per share +2 more

5 metrics

Total shares sold 4363 shares Two open-market sales on May 7–8, 2026

Sale price May 7, 2026 $188.50 per share 2433 Class A shares sold in open-market transaction

Sale price May 8, 2026 $185.82 per share 1930 Class A shares sold in open-market transaction

Shares held after final sale 2106 shares Direct ownership reported following May 8, 2026 transaction

Corrected prior gift amount 2301 shares Previously reported as gifted on December 10, 2021 but did not occur

Key Terms

Class A Common Stock, open-market sale, Rule 10b5-1 plan

3 terms

Class A Common Stock financial

"Julie Richardson reported transactions in Datadog 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

"Each transaction is described as an open-market sale of shares."

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.

Rule 10b5-1 plan regulatory

"Shares sold pursuant to a 10b5-1 plan dated November 7, 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.

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^*

Richardson Julie

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/07/2026

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	05/07/2026		S(1)		2,433	D	$188.5	4,036(2)	D
Class A Common Stock	05/08/2026		S(1)		1,930	D	$185.82	2,106(2)	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 November 7, 2025.

2. The balance reported reflects a correction of 2,301 shares reported as gifted on December 10, 2021, which did not occur. This Form 4 is also deemed to amend and restate the number of shares reported as beneficially owned on each Form 4 filed on or after December 10, 2021.

Remarks:

	/s/ Kerry Acocella, Attorney-in-Fact	05/11/2026
	** 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 transactions did Datadog (DDOG) director Julie Richardson report?

Julie Richardson reported two open-market sales of Datadog Class A Common Stock, totaling 4363 shares. She sold 2433 shares on May 7, 2026, and 1930 shares on May 8, 2026, at prices near $188.50 and $185.82 per share.

At what prices did Julie Richardson sell Datadog (DDOG) shares?

She sold Datadog Class A shares at $188.50 per share on May 7, 2026, and $185.82 per share on May 8, 2026. Both transactions were reported as open-market sales in the Form 4 filing for Datadog, Inc.

How many Datadog (DDOG) shares does Julie Richardson hold after the reported sales?

Following the reported sales, Julie Richardson is shown holding 2106 Datadog Class A Common Stock shares directly. The Form 4 notes this post-transaction balance after the May 8, 2026 open-market sale of 1930 shares under her trading plan.

Were Julie Richardson’s Datadog (DDOG) share sales made under a 10b5-1 plan?

Yes. The filing states that the Datadog shares were sold pursuant to a Rule 10b5-1 trading plan dated November 7, 2025. Such plans pre-schedule trades, indicating the timing of these sales was set in advance rather than decided opportunistically.

Does the Datadog (DDOG) Form 4 include any corrections to prior reports?

Yes. The Form 4 explains that a previously reported gift of 2301 shares on December 10, 2021 did not occur. It states the current filing corrects that error and amends the number of shares reported as beneficially owned on subsequent Forms 4.