LE-QUOC ALEXIS (President & CTO) sold 7.8% of their position (43.22K shares) of DATADOG, INC. on the open market

Open‑market sale worth $9.88M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 8 sales

LE-QUOC ALEXIS

Filed: 8/26/2026ACC: 0001561550-26-000264

InsiderLE-QUOC ALEXISCIK 1783984

→

IssuerDATADOG, INC.CIK 1561550

DirectorOfficer· President & CTO

Since Sep 2019

-43.22K

Net shares

Net seller

$9.88M

Total sold

Open market trades

0B · 8S

Total transactions

43.22K acquired · 86.45K disposed

Non-Derivative Transactions9

Class A Common Stock

Direct

C · Conversion

+43.22K

Price / share

—

Trade value

—

% of position

8.5%

8/24/2026

509.81K→553.03K

Class A Common Stock

Direct

S · Sale

−4.89K

Price / share

$226.22

Trade value

$1.11M

% of position

0.9%

8/24/2026

553.03K→548.13K

Class A Common Stock

Direct

S · Sale

−7.15K

Price / share

$227.38

Trade value

$1.63M

% of position

1.3%

8/24/2026

548.13K→540.98K

Class A Common Stock

Direct

S · Sale

−14.45K

Price / share

$228.30

Trade value

$3.30M

% of position

2.7%

8/24/2026

540.98K→526.53K

Class A Common Stock

Direct

S · Sale

−9.32K

Price / share

$229.18

Trade value

$2.14M

% of position

1.8%

8/24/2026

526.53K→517.21K

Class A Common Stock

Direct

S · Sale

−3.83K

Price / share

$230.27

Trade value

$881.01K

% of position

0.7%

8/24/2026

517.21K→513.38K

Class A Common Stock

Direct

S · Sale

−1.01K

Price / share

$231.14

Trade value

$232.52K

% of position

0.2%

8/24/2026

513.38K→512.37K

Class A Common Stock

Direct

S · Sale

−769.00

Price / share

$232.41

Trade value

$178.72K

% of position

0.2%

8/24/2026

512.37K→511.61K

Class A Common Stock

Direct

S · Sale

−1.80K

Price / share

$233.44

Trade value

$420.19K

% of position

0.4%

8/24/2026

511.61K→509.81K

Total

Net shares

+0.00

Net value

-$9.88M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	8/24/2026	C · Conversion	+43.22K	—	—	8.5%	509.81K	553.03K
Class A Common Stock Direct	8/24/2026	S · Sale	−4.89K	$226.22	$1.11M	0.9%	553.03K	548.13K
Class A Common Stock Direct	8/24/2026	S · Sale	−7.15K	$227.38	$1.63M	1.3%	548.13K	540.98K
Class A Common Stock Direct	8/24/2026	S · Sale	−14.45K	$228.30	$3.30M	2.7%	540.98K	526.53K
Class A Common Stock Direct	8/24/2026	S · Sale	−9.32K	$229.18	$2.14M	1.8%	526.53K	517.21K
Class A Common Stock Direct	8/24/2026	S · Sale	−3.83K	$230.27	$881.01K	0.7%	517.21K	513.38K
Class A Common Stock Direct	8/24/2026	S · Sale	−1.01K	$231.14	$232.52K	0.2%	513.38K	512.37K
Class A Common Stock Direct	8/24/2026	S · Sale	−769.00	$232.41	$178.72K	0.2%	512.37K	511.61K
Class A Common Stock Direct	8/24/2026	S · Sale	−1.80K	$233.44	$420.19K	0.4%	511.61K	509.81K
Total			+0.00		-$9.88M

Derivative Transactions1

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

43.22K shares

−43.22K

Strike price

Held after

2.24M

Exercisable

—

8/24/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Class B Common Stock Direct	Class A Common Stock43.22K shares	8/24/2026	C · Conversion	−43.22K		—	2.24M

Non-Derivative Holdings (Post-Transaction)1

Class A Common Stock

Indirect

Shares owned169.00

Total

169.00 indirect169.00

Security Title	Shares Owned	Ownership Type
Class A Common Stock	169.00	Indirect
Total	169.00	169.00 indirect

Derivative Holdings (Post-Transaction)1

Class B Common Stock

Indirect

Underlying security

Class A Common Stock

Underlying shares

6.15M

Shares owned

6.15M

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

6.15M

Owned

6.15M

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Class B Common Stock Indirect	Class A Common Stock		—	—	6.15M	6.15M
Total					6.15M	6.15M