LE-QUOC ALEXIS (President & CTO) sold 9.6% of their position (53.91K shares) of DATADOG, INC. on the open market

Open‑market sale worth $12.24M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 13 sales

LE-QUOC ALEXIS

Filed: 9/3/2026ACC: 0001561550-26-000283

InsiderLE-QUOC ALEXISCIK 1783984

→

IssuerDATADOG, INC.CIK 1561550

DirectorOfficer· President & CTO

Since Sep 2019

-53.91K

Net shares

Net seller

$12.24M

Total sold

Open market trades

0B · 13S

Total transactions

72.66K acquired · 126.57K disposed

Non-Derivative Transactions15

Class A Common Stock

Direct

C · Conversion

+43.22K

Price / share

—

Trade value

—

% of position

8.5%

9/1/2026

509.81K→553.03K

Class A Common Stock

Direct

C · Conversion

+10.69K

Price / share

—

Trade value

—

% of position

1.9%

9/1/2026

553.03K→563.72K

Class A Common Stock

Direct

S · Sale

−11.37K

Price / share

$223.59

Trade value

$2.54M

% of position

2.0%

9/1/2026

563.72K→552.35K

Class A Common Stock

Direct

S · Sale

−7.60K

Price / share

$224.61

Trade value

$1.71M

% of position

1.4%

9/1/2026

552.35K→544.75K

Class A Common Stock

Direct

S · Sale

−9.13K

Price / share

$225.62

Trade value

$2.06M

% of position

1.7%

9/1/2026

544.75K→535.61K

Class A Common Stock

Direct

S · Sale

−2.99K

Price / share

$226.56

Trade value

$677.66K

% of position

0.6%

9/1/2026

535.61K→532.62K

Class A Common Stock

Direct

S · Sale

−4.18K

Price / share

$227.72

Trade value

$951.17K

% of position

0.8%

9/1/2026

532.62K→528.44K

Class A Common Stock

Direct

S · Sale

−5.34K

Price / share

$228.63

Trade value

$1.22M

% of position

1.0%

9/1/2026

528.44K→523.11K

Class A Common Stock

Direct

S · Sale

−5.50K

Price / share

$229.63

Trade value

$1.26M

% of position

1.1%

9/1/2026

523.11K→517.61K

Class A Common Stock

Direct

S · Sale

−2.50K

Price / share

$230.34

Trade value

$575.86K

% of position

0.5%

9/1/2026

517.61K→515.11K

Class A Common Stock

Direct

S · Sale

−600.00

Price / share

$231.54

Trade value

$138.93K

% of position

0.1%

9/1/2026

515.11K→514.50K

Class A Common Stock

Direct

S · Sale

−1.10K

Price / share

$233.28

Trade value

$256.61K

% of position

0.2%

9/1/2026

514.50K→513.40K

Class A Common Stock

Direct

S · Sale

−1.80K

Price / share

$234.09

Trade value

$421.36K

% of position

0.4%

9/1/2026

513.40K→511.61K

Class A Common Stock

Direct

S · Sale

−1.40K

Price / share

$235.05

Trade value

$329.07K

% of position

0.3%

9/1/2026

511.61K→510.20K

Class A Common Stock

Direct

S · Sale

−400.00

Price / share

$236.05

Trade value

$94.42K

% of position

0.1%

9/1/2026

510.20K→509.81K

Total

Net shares

+0.00

Net value

-$12.24M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	9/1/2026	C · Conversion	+43.22K	—	—	8.5%	509.81K	553.03K
Class A Common Stock Direct	9/1/2026	C · Conversion	+10.69K	—	—	1.9%	553.03K	563.72K
Class A Common Stock Direct	9/1/2026	S · Sale	−11.37K	$223.59	$2.54M	2.0%	563.72K	552.35K
Class A Common Stock Direct	9/1/2026	S · Sale	−7.60K	$224.61	$1.71M	1.4%	552.35K	544.75K
Class A Common Stock Direct	9/1/2026	S · Sale	−9.13K	$225.62	$2.06M	1.7%	544.75K	535.61K
Class A Common Stock Direct	9/1/2026	S · Sale	−2.99K	$226.56	$677.66K	0.6%	535.61K	532.62K
Class A Common Stock Direct	9/1/2026	S · Sale	−4.18K	$227.72	$951.17K	0.8%	532.62K	528.44K
Class A Common Stock Direct	9/1/2026	S · Sale	−5.34K	$228.63	$1.22M	1.0%	528.44K	523.11K
Class A Common Stock Direct	9/1/2026	S · Sale	−5.50K	$229.63	$1.26M	1.1%	523.11K	517.61K
Class A Common Stock Direct	9/1/2026	S · Sale	−2.50K	$230.34	$575.86K	0.5%	517.61K	515.11K
Class A Common Stock Direct	9/1/2026	S · Sale	−600.00	$231.54	$138.93K	0.1%	515.11K	514.50K
Class A Common Stock Direct	9/1/2026	S · Sale	−1.10K	$233.28	$256.61K	0.2%	514.50K	513.40K
Class A Common Stock Direct	9/1/2026	S · Sale	−1.80K	$234.09	$421.36K	0.4%	513.40K	511.61K
Class A Common Stock Direct	9/1/2026	S · Sale	−1.40K	$235.05	$329.07K	0.3%	511.61K	510.20K
Class A Common Stock Direct	9/1/2026	S · Sale	−400.00	$236.05	$94.42K	0.1%	510.20K	509.81K
Total			+0.00		-$12.24M

Derivative Transactions3

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Class B Common Stock

18.75K shares

−18.75K

Strike price

10.74

Held after

131.25K

Exercisable

—

9/1/2026

Class B Common Stock

Direct

M · Option Exercise

Converts to

Class A Common Stock

18.75K shares

+18.75K

Strike price

Held after

2.26M

Exercisable

—

9/1/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

53.91K shares

−53.91K

Strike price

Held after

2.20M

Exercisable

—

9/1/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (Right to Buy) Direct	Class B Common Stock18.75K shares	9/1/2026	M · Option Exercise	−18.75K	10.74	—	131.25K
Class B Common Stock Direct	Class A Common Stock18.75K shares	9/1/2026	M · Option Exercise	+18.75K		—	2.26M
Class B Common Stock Direct	Class A Common Stock53.91K shares	9/1/2026	C · Conversion	−53.91K		—	2.20M

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