SEIFERT THOMAS J (Chief Financial Officer) sold 4.5% of their position (10K shares) of CLOUDFLARE, INC. on the open market

Open‑market sale worth $2.01M — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 8 sales

SEIFERT THOMAS J

Filed: 5/19/2026ACC: 0001473289-26-000014

InsiderSEIFERT THOMAS JCIK 1473289

→

IssuerCLOUDFLARE, INC.CIK 1477333

Officer· Chief Financial Officer

Since Sep 2019

-19.67K

Net shares

Net seller

$3.94M

Total sold

Open market trades

0B · 8S

Total transactions

20K acquired · 39.67K disposed

Non-Derivative Transactions10

Class A Common Stock

Direct

F · Tax Withholding

−9.67K

Price / share

$199.81

Trade value

$1.93M

% of position

4.4%

5/15/2026

221.68K→212.01K

Class A Common Stock

Direct

C · Conversion

+10K

Price / share

—

Trade value

—

% of position

4.7%

5/18/2026

212.01K→222.01K

Class A Common Stock

Direct

S · Sale

−100.00

Price / share

$193.28

Trade value

$19.33K

% of position

0.0%

5/18/2026

222.01K→221.91K

Class A Common Stock

Direct

S · Sale

−300.00

Price / share

$195.14

Trade value

$58.54K

% of position

0.1%

5/18/2026

221.91K→221.61K

Class A Common Stock

Direct

S · Sale

−400.00

Price / share

$197.81

Trade value

$79.12K

% of position

0.2%

5/18/2026

221.61K→221.21K

Class A Common Stock

Direct

S · Sale

−928.00

Price / share

$199.05

Trade value

$184.72K

% of position

0.4%

5/18/2026

221.21K→220.29K

Class A Common Stock

Direct

S · Sale

−2.43K

Price / share

$200.20

Trade value

$486.89K

% of position

1.1%

5/18/2026

220.29K→217.85K

Class A Common Stock

Direct

S · Sale

−3.57K

Price / share

$201.21

Trade value

$718.31K

% of position

1.6%

5/18/2026

217.85K→214.28K

Class A Common Stock

Direct

S · Sale

−2K

Price / share

$202.17

Trade value

$404.33K

% of position

0.9%

5/18/2026

214.28K→212.28K

Class A Common Stock

Direct

S · Sale

−270.00

Price / share

$203.02

Trade value

$54.81K

% of position

0.1%

5/18/2026

212.28K→212.01K

Total

Net shares

−9.67K

Net value

-$3.94M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	5/15/2026	F · Tax Withholding	−9.67K	$199.81	$1.93M	4.4%	221.68K	212.01K
Class A Common Stock Direct	5/18/2026	C · Conversion	+10K	—	—	4.7%	212.01K	222.01K
Class A Common Stock Direct	5/18/2026	S · Sale	−100.00	$193.28	$19.33K	0.0%	222.01K	221.91K
Class A Common Stock Direct	5/18/2026	S · Sale	−300.00	$195.14	$58.54K	0.1%	221.91K	221.61K
Class A Common Stock Direct	5/18/2026	S · Sale	−400.00	$197.81	$79.12K	0.2%	221.61K	221.21K
Class A Common Stock Direct	5/18/2026	S · Sale	−928.00	$199.05	$184.72K	0.4%	221.21K	220.29K
Class A Common Stock Direct	5/18/2026	S · Sale	−2.43K	$200.20	$486.89K	1.1%	220.29K	217.85K
Class A Common Stock Direct	5/18/2026	S · Sale	−3.57K	$201.21	$718.31K	1.6%	217.85K	214.28K
Class A Common Stock Direct	5/18/2026	S · Sale	−2K	$202.17	$404.33K	0.9%	214.28K	212.28K
Class A Common Stock Direct	5/18/2026	S · Sale	−270.00	$203.02	$54.81K	0.1%	212.28K	212.01K
Total			−9.67K		-$3.94M

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

40K

Exercisable

—

5/18/2026

Class B Common Stock

Direct

M · Option Exercise

Converts to

Class A Common Stock

10K shares

+10K

Strike price

Held after

18.93K

Exercisable

—

5/18/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

10K shares

−10K

Strike price

Held after

8.93K

Exercisable

—

5/18/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Employee Stock Option (right to buy) Direct	Class B Common Stock10K shares	5/18/2026	M · Option Exercise	−10K	2.04	—	40K
Class B Common Stock Direct	Class A Common Stock10K shares	5/18/2026	M · Option Exercise	+10K		—	18.93K
Class B Common Stock Direct	Class A Common Stock10K shares	5/18/2026	C · Conversion	−10K		—	8.93K

Non-Derivative Holdings (Post-Transaction)0

No non-derivative holdings reported

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

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

—

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	—	—	150K	150K
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
Total				288.30K	288.30K