SEC Form 4 · accession 0001561550-26-000320

Datadog, Inc. · DDOG

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Alexis Le-Quoc

Officer — Chief Technology Officer · Director

Period of report

Sep 23, 2026

Accepted (ET)

Sep 25, 2026 · 4:43 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0001561550

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock	Sep 23, 2026	C	43,224	$0.00	A	531,257	D
Class A Common Stock^F3	Sep 23, 2026	S	645	$249.2082	D	530,612	D
Class A Common Stock^F4	Sep 23, 2026	S	1,372	$250.5526	D	529,240	D
Class A Common Stock^F5	Sep 23, 2026	S	22,007	$251.4458	D	507,233	D
Class A Common Stock^F6	Sep 23, 2026	S	9,633	$252.3567	D	497,600	D
Class A Common Stock^F7	Sep 23, 2026	S	5,347	$253.3223	D	492,253	D
Class A Common Stock^F8	Sep 23, 2026	S	2,000	$254.3497	D	490,253	D
Class A Common Stock^F9	Sep 23, 2026	S	1,600	$255.5912	D	488,653	D
Class A Common Stock^F10	Sep 23, 2026	S	620	$256.1465	D	488,033	D
Class A Common Stock^F11	holding	—	—		—	169	I	By Trust

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Class B Common Stock^F1	—	Sep 23, 2026	C	43,224	D	—	—	Class A Common Stock	43,224	2,160,030	D
Class B Common Stock^F11,F1	—	holding	—	—	—	—	—	Class A Common Stock	6,146,835	6,146,835	I

Explanation of responses

F1Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon the earliest of: (i) any transfer, whether or not for value, except for certain "Permitted Transfers" as defined in the Issuer's amended and restated certificate of incorporation, (ii) the death of the Reporting Person in the case of shares held directly or in a trustee capacity, and (iii) the tenth anniversary of the Issuer's initial public offering of its Class A Common Stock.
F10Price reported is a weighted-average sales price. The shares were sold at prices ranging from $256.08 to $256.39. 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.
F11Shares are held by the Alexis Le-Quoc Revocable Trust.
F2Shares sold pursuant to a 10b5-1 plan dated June 13, 2025.
F3Price reported is a weighted-average sales price. The shares were sold at prices ranging from $248.85 to $249.74. 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.
F4Price reported is a weighted-average sales price. The shares were sold at prices ranging from $249.89 to $250.86. 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.
F5Price reported is a weighted-average sales price. The shares were sold at prices ranging from $250.91 to $251.90. 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.
F6Price reported is a weighted-average sales price. The shares were sold at prices ranging from $251.92 to $252.88. 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.
F7Price reported is a weighted-average sales price. The shares were sold at prices ranging from $252.92 to $253.89. 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.
F8Price reported is a weighted-average sales price. The shares were sold at prices ranging from $254.00 to $254.90. 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.
F9Price reported is a weighted-average sales price. The shares were sold at prices ranging from $255.06 to $255.97. 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.