THOMPSON JOHN WENDELL sold 74.4% of their position (13.50K shares) of RUBRIK, INC. on the open market

Open‑market sale worth $749.1K — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 4 sales

THOMPSON JOHN WENDELL

Filed: 5/4/2026ACC: 0001207433-26-000012

InsiderTHOMPSON JOHN WENDELLCIK 1207433

→

IssuerRUBRIK, INC.CIK 1943896

Director

Since Mar 2026

-13.50K

Net shares

Net seller

$749.1K

Total sold

Open market trades

0B · 4S

Total transactions

22K acquired · 35.50K disposed

Non-Derivative Transactions5

Class A Common Stock

Indirect

S · Sale

−2K

Price / share

$55.39

Trade value

$110.78K

% of position

10.0%

5/1/2026

20K→18K

Class A Common Stock

Indirect

S · Sale

−500.00

Price / share

$56.00

Trade value

$28K

% of position

2.8%

5/1/2026

18K→17.50K

Class A Common Stock

Direct

C · Conversion

+11K

Price / share

—

Trade value

—

% of position

236.4%

5/1/2026

4.65K→15.65K

Class A Common Stock

Direct

S · Sale

−7.20K

Price / share

$55.25

Trade value

$397.63K

% of position

46.0%

5/1/2026

15.65K→8.46K

Class A Common Stock

Direct

S · Sale

−3.80K

Price / share

$55.92

Trade value

$212.66K

% of position

45.0%

5/1/2026

8.46K→4.65K

Total

Net shares

−2.50K

Net value

-$749.08K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Indirect	5/1/2026	S · Sale	−2K	$55.39	$110.78K	10.0%	20K	18K
Class A Common Stock Indirect	5/1/2026	S · Sale	−500.00	$56.00	$28K	2.8%	18K	17.50K
Class A Common Stock Direct	5/1/2026	C · Conversion	+11K	—	—	236.4%	4.65K	15.65K
Class A Common Stock Direct	5/1/2026	S · Sale	−7.20K	$55.25	$397.63K	46.0%	15.65K	8.46K
Class A Common Stock Direct	5/1/2026	S · Sale	−3.80K	$55.92	$212.66K	45.0%	8.46K	4.65K
Total			−2.50K		-$749.08K

Derivative Transactions3

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Class B Common Stock

11K shares

−11K

Strike price

4.38

Held after

110.95K

Exercisable

—

5/1/2026

Class B Common Stock

Direct

M · Option Exercise

Converts to

Class A Common Stock

11K shares

+11K

Strike price

Held after

61K

Exercisable

—

5/1/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

11K shares

−11K

Strike price

Held after

50K

Exercisable

—

5/1/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (Right to Buy) Direct	Class B Common Stock11K shares	5/1/2026	M · Option Exercise	−11K	4.38	—	110.95K
Class B Common Stock Direct	Class A Common Stock11K shares	5/1/2026	M · Option Exercise	+11K		—	61K
Class B Common Stock Direct	Class A Common Stock11K shares	5/1/2026	C · Conversion	−11K		—	50K

Non-Derivative Holdings (Post-Transaction)0

No non-derivative holdings reported

Derivative Holdings (Post-Transaction)1

Class B Common Stock

Indirect

Underlying security

Class A Common Stock

Underlying shares

815.34K

Shares owned

815.34K

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

815.34K

Owned

815.34K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Class B Common Stock Indirect	Class A Common Stock		—	—	815.34K	815.34K
Total					815.34K	815.34K