LE-QUOC ALEXIS (President & CTO) sold 7.5% of their position (43.22K shares) of DATADOG, INC. on the open market

Open‑market sale worth $8.99M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 7 sales

LE-QUOC ALEXIS

Filed: 5/20/2026ACC: 0001561550-26-000151

InsiderLE-QUOC ALEXISCIK 1783984

→

IssuerDATADOG, INC.CIK 1561550

DirectorOfficer· President & CTO

Since Sep 2019

-43.22K

Net shares

Net seller

$8.99M

Total sold

Open market trades

0B · 7S

Total transactions

43.22K acquired · 86.45K disposed

Non-Derivative Transactions8

Class A Common Stock

Direct

C · Conversion

+43.22K

Price / share

—

Trade value

—

% of position

8.1%

5/18/2026

531.31K→574.53K

Class A Common Stock

Direct

S · Sale

−1.60K

Price / share

$204.47

Trade value

$327.15K

% of position

0.3%

5/18/2026

574.53K→572.93K

Class A Common Stock

Direct

S · Sale

−1.20K

Price / share

$205.63

Trade value

$246.75K

% of position

0.2%

5/18/2026

572.93K→571.74K

Class A Common Stock

Direct

S · Sale

−3.21K

Price / share

$206.79

Trade value

$663.81K

% of position

0.6%

5/18/2026

571.74K→568.52K

Class A Common Stock

Direct

S · Sale

−16.35K

Price / share

$207.66

Trade value

$3.39M

% of position

2.9%

5/18/2026

568.52K→552.18K

Class A Common Stock

Direct

S · Sale

−14.90K

Price / share

$208.68

Trade value

$3.11M

% of position

2.7%

5/18/2026

552.18K→537.28K

Class A Common Stock

Direct

S · Sale

−5.07K

Price / share

$209.46

Trade value

$1.06M

% of position

0.9%

5/18/2026

537.28K→532.21K

Class A Common Stock

Direct

S · Sale

−900.00

Price / share

$210.44

Trade value

$189.40K

% of position

0.2%

5/18/2026

532.21K→531.31K

Total

Net shares

+0.00

Net value

-$8.99M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	5/18/2026	C · Conversion	+43.22K	—	—	8.1%	531.31K	574.53K
Class A Common Stock Direct	5/18/2026	S · Sale	−1.60K	$204.47	$327.15K	0.3%	574.53K	572.93K
Class A Common Stock Direct	5/18/2026	S · Sale	−1.20K	$205.63	$246.75K	0.2%	572.93K	571.74K
Class A Common Stock Direct	5/18/2026	S · Sale	−3.21K	$206.79	$663.81K	0.6%	571.74K	568.52K
Class A Common Stock Direct	5/18/2026	S · Sale	−16.35K	$207.66	$3.39M	2.9%	568.52K	552.18K
Class A Common Stock Direct	5/18/2026	S · Sale	−14.90K	$208.68	$3.11M	2.7%	552.18K	537.28K
Class A Common Stock Direct	5/18/2026	S · Sale	−5.07K	$209.46	$1.06M	0.9%	537.28K	532.21K
Class A Common Stock Direct	5/18/2026	S · Sale	−900.00	$210.44	$189.40K	0.2%	532.21K	531.31K
Total			+0.00		-$8.99M

Derivative Transactions1

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

43.22K shares

−43.22K

Strike price

Held after

2.47M

Exercisable

—

5/18/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Class B Common Stock Direct	Class A Common Stock43.22K shares	5/18/2026	C · Conversion	−43.22K		—	2.47M

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

6.20M

Shares owned

6.20M

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

6.20M

Owned

6.20M

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Class B Common Stock Indirect	Class A Common Stock		—	—	6.20M	6.20M
Total					6.20M	6.20M