LE-QUOC ALEXIS (President & CTO) sold 9.9% of their position (53.91K shares) of DATADOG, INC. on the open market

Open‑market sale worth $14.75M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 9 sales

LE-QUOC ALEXIS

Filed: 10/9/2026ACC: 0001561550-26-000324

InsiderLE-QUOC ALEXISCIK 1783984

→

IssuerDATADOG, INC.CIK 1561550

DirectorOfficer· President & CTO

Since Sep 2019

-53.91K

Net shares

Net seller

$14.75M

Total sold

Open market trades

0B · 9S

Total transactions

64.60K acquired · 118.51K disposed

Non-Derivative Transactions11

Class A Common Stock

Direct

C · Conversion

+43.22K

Price / share

—

Trade value

—

% of position

8.9%

10/7/2026

488.03K→531.26K

Class A Common Stock

Direct

C · Conversion

+10.69K

Price / share

—

Trade value

—

% of position

2.0%

10/7/2026

531.26K→541.95K

Class A Common Stock

Direct

S · Sale

−18.61K

Price / share

$271.40

Trade value

$5.05M

% of position

3.4%

10/7/2026

541.95K→523.34K

Class A Common Stock

Direct

S · Sale

−5.34K

Price / share

$272.25

Trade value

$1.45M

% of position

1.0%

10/7/2026

523.34K→518K

Class A Common Stock

Direct

S · Sale

−2.79K

Price / share

$273.27

Trade value

$762.14K

% of position

0.5%

10/7/2026

518K→515.21K

Class A Common Stock

Direct

S · Sale

−13.04K

Price / share

$274.51

Trade value

$3.58M

% of position

2.5%

10/7/2026

515.21K→502.17K

Class A Common Stock

Direct

S · Sale

−8.27K

Price / share

$275.26

Trade value

$2.28M

% of position

1.6%

10/7/2026

502.17K→493.90K

Class A Common Stock

Direct

S · Sale

−2.27K

Price / share

$276.23

Trade value

$627.59K

% of position

0.5%

10/7/2026

493.90K→491.63K

Class A Common Stock

Direct

S · Sale

−1.70K

Price / share

$277.36

Trade value

$471.52K

% of position

0.3%

10/7/2026

491.63K→489.93K

Class A Common Stock

Direct

S · Sale

−1.30K

Price / share

$278.88

Trade value

$362.55K

% of position

0.3%

10/7/2026

489.93K→488.63K

Class A Common Stock

Direct

S · Sale

−600.00

Price / share

$280.43

Trade value

$168.26K

% of position

0.1%

10/7/2026

488.63K→488.03K

Total

Net shares

+0.00

Net value

-$14.75M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	10/7/2026	C · Conversion	+43.22K	—	—	8.9%	488.03K	531.26K
Class A Common Stock Direct	10/7/2026	C · Conversion	+10.69K	—	—	2.0%	531.26K	541.95K
Class A Common Stock Direct	10/7/2026	S · Sale	−18.61K	$271.40	$5.05M	3.4%	541.95K	523.34K
Class A Common Stock Direct	10/7/2026	S · Sale	−5.34K	$272.25	$1.45M	1.0%	523.34K	518K
Class A Common Stock Direct	10/7/2026	S · Sale	−2.79K	$273.27	$762.14K	0.5%	518K	515.21K
Class A Common Stock Direct	10/7/2026	S · Sale	−13.04K	$274.51	$3.58M	2.5%	515.21K	502.17K
Class A Common Stock Direct	10/7/2026	S · Sale	−8.27K	$275.26	$2.28M	1.6%	502.17K	493.90K
Class A Common Stock Direct	10/7/2026	S · Sale	−2.27K	$276.23	$627.59K	0.5%	493.90K	491.63K
Class A Common Stock Direct	10/7/2026	S · Sale	−1.70K	$277.36	$471.52K	0.3%	491.63K	489.93K
Class A Common Stock Direct	10/7/2026	S · Sale	−1.30K	$278.88	$362.55K	0.3%	489.93K	488.63K
Class A Common Stock Direct	10/7/2026	S · Sale	−600.00	$280.43	$168.26K	0.1%	488.63K	488.03K
Total			+0.00		-$14.75M

Derivative Transactions3

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Class B Common Stock

10.69K shares

−10.69K

Strike price

10.74

Held after

120.56K

Exercisable

—

10/7/2026

Class B Common Stock

Direct

M · Option Exercise

Converts to

Class A Common Stock

10.69K shares

+10.69K

Strike price

Held after

2.17M

Exercisable

—

10/7/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

53.91K shares

−53.91K

Strike price

Held after

2.12M

Exercisable

—

10/7/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (Right to Buy) Direct	Class B Common Stock10.69K shares	10/7/2026	M · Option Exercise	−10.69K	10.74	—	120.56K
Class B Common Stock Direct	Class A Common Stock10.69K shares	10/7/2026	M · Option Exercise	+10.69K		—	2.17M
Class B Common Stock Direct	Class A Common Stock53.91K shares	10/7/2026	C · Conversion	−53.91K		—	2.12M

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