SEIFERT THOMAS J (Chief Financial Officer) sold 8.5% of their position (10K shares) of CLOUDFLARE, INC. on the open market

Open‑market sale worth $3.32M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 12 sales

SEIFERT THOMAS J

Filed: 9/21/2026ACC: 0001473289-26-000029

InsiderSEIFERT THOMAS JCIK 1473289

→

IssuerCLOUDFLARE, INC.CIK 1477333

Officer· Chief Financial Officer

Since Sep 2019

-10K

Net shares

Net seller

$3.32M

Total sold

Open market trades

0B · 12S

Total transactions

20K acquired · 30K disposed

Non-Derivative Transactions13

Class A Common Stock

Direct

C · Conversion

+10K

Price / share

—

Trade value

—

% of position

9.3%

9/17/2026

107.90K→117.90K

Class A Common Stock

Direct

S · Sale

−100.00

Price / share

$318.90

Trade value

$31.89K

% of position

0.1%

9/17/2026

117.90K→117.80K

Class A Common Stock

Direct

S · Sale

−100.00

Price / share

$320.89

Trade value

$32.09K

% of position

0.1%

9/17/2026

117.80K→117.70K

Class A Common Stock

Direct

S · Sale

−100.00

Price / share

$326.56

Trade value

$32.66K

% of position

0.1%

9/17/2026

117.70K→117.60K

Class A Common Stock

Direct

S · Sale

−300.00

Price / share

$328.04

Trade value

$98.41K

% of position

0.3%

9/17/2026

117.60K→117.30K

Class A Common Stock

Direct

S · Sale

−700.00

Price / share

$329.37

Trade value

$230.56K

% of position

0.6%

9/17/2026

117.30K→116.60K

Class A Common Stock

Direct

S · Sale

−700.00

Price / share

$330.23

Trade value

$231.16K

% of position

0.6%

9/17/2026

116.60K→115.90K

Class A Common Stock

Direct

S · Sale

−1.20K

Price / share

$331.59

Trade value

$396.58K

% of position

1.0%

9/17/2026

115.90K→114.71K

Class A Common Stock

Direct

S · Sale

−1.60K

Price / share

$332.50

Trade value

$533.33K

% of position

1.4%

9/17/2026

114.71K→113.10K

Class A Common Stock

Direct

S · Sale

−2.63K

Price / share

$333.62

Trade value

$878.08K

% of position

2.3%

9/17/2026

113.10K→110.47K

Class A Common Stock

Direct

S · Sale

−1.87K

Price / share

$334.59

Trade value

$625.02K

% of position

1.7%

9/17/2026

110.47K→108.60K

Class A Common Stock

Direct

S · Sale

−600.00

Price / share

$335.32

Trade value

$201.19K

% of position

0.6%

9/17/2026

108.60K→108K

Class A Common Stock

Direct

S · Sale

−100.00

Price / share

$336.51

Trade value

$33.65K

% of position

0.1%

9/17/2026

108K→107.90K

Total

Net shares

+0.00

Net value

-$3.32M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	9/17/2026	C · Conversion	+10K	—	—	9.3%	107.90K	117.90K
Class A Common Stock Direct	9/17/2026	S · Sale	−100.00	$318.90	$31.89K	0.1%	117.90K	117.80K
Class A Common Stock Direct	9/17/2026	S · Sale	−100.00	$320.89	$32.09K	0.1%	117.80K	117.70K
Class A Common Stock Direct	9/17/2026	S · Sale	−100.00	$326.56	$32.66K	0.1%	117.70K	117.60K
Class A Common Stock Direct	9/17/2026	S · Sale	−300.00	$328.04	$98.41K	0.3%	117.60K	117.30K
Class A Common Stock Direct	9/17/2026	S · Sale	−700.00	$329.37	$230.56K	0.6%	117.30K	116.60K
Class A Common Stock Direct	9/17/2026	S · Sale	−700.00	$330.23	$231.16K	0.6%	116.60K	115.90K
Class A Common Stock Direct	9/17/2026	S · Sale	−1.20K	$331.59	$396.58K	1.0%	115.90K	114.71K
Class A Common Stock Direct	9/17/2026	S · Sale	−1.60K	$332.50	$533.33K	1.4%	114.71K	113.10K
Class A Common Stock Direct	9/17/2026	S · Sale	−2.63K	$333.62	$878.08K	2.3%	113.10K	110.47K
Class A Common Stock Direct	9/17/2026	S · Sale	−1.87K	$334.59	$625.02K	1.7%	110.47K	108.60K
Class A Common Stock Direct	9/17/2026	S · Sale	−600.00	$335.32	$201.19K	0.6%	108.60K	108K
Class A Common Stock Direct	9/17/2026	S · Sale	−100.00	$336.51	$33.65K	0.1%	108K	107.90K
Total			+0.00		-$3.32M

Derivative Transactions3

Employee Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Class B Common Stock

10K shares

−10K

Strike price

2.04

Held after

0.00

Exercisable

—

9/17/2026

Class B Common Stock

Direct

M · Option Exercise

Converts to

Class A Common Stock

10K shares

+10K

Strike price

Held after

18.93K

Exercisable

—

9/17/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

10K shares

−10K

Strike price

Held after

8.93K

Exercisable

—

9/17/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Employee Stock Option (right to buy) Direct	Class B Common Stock10K shares	9/17/2026	M · Option Exercise	−10K	2.04	—	0.00
Class B Common Stock Direct	Class A Common Stock10K shares	9/17/2026	M · Option Exercise	+10K		—	18.93K
Class B Common Stock Direct	Class A Common Stock10K shares	9/17/2026	C · Conversion	−10K		—	8.93K

Non-Derivative Holdings (Post-Transaction)1

Class A Common Stock

Indirect

Shares owned92.34K

Total

92.34K indirect92.34K

Security Title	Shares Owned	Ownership Type
Class A Common Stock	92.34K	Indirect
Total	92.34K	92.34K indirect

Derivative Holdings (Post-Transaction)4

Class B Common Stock

Indirect

Underlying security

Class A Common Stock

Underlying shares

46.10K

Shares owned

46.10K

Exercise price

Expiration

—

Exercise window

—

Class B Common Stock

Indirect

Underlying security

Class A Common Stock

Underlying shares

46.10K

Shares owned

46.10K

Exercise price

Expiration

—

Exercise window

—

Class B Common Stock

Indirect

Underlying security

Class A Common Stock

Underlying shares

150K

Shares owned

150K

Exercise price

Expiration

—

Exercise window

—

Class B Common Stock

Indirect

Underlying security

Class A Common Stock

Underlying shares

46.10K

Shares owned

46.10K

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

288.30K

Owned

288.30K

Security	Underlying	Exercise Window	Expiration	Underlying Shares	Shares Owned
Class B Common Stock Indirect	Class A Common Stock	—	—	46.10K	46.10K
Class B Common Stock Indirect	Class A Common Stock	—	—	46.10K	46.10K
Class B Common Stock Indirect	Class A Common Stock	—	—	150K	150K
Class B Common Stock Indirect	Class A Common Stock	—	—	46.10K	46.10K
Total				288.30K	288.30K