THOMPSON JOHN WENDELL sold 61.8% of their position (13.50K shares) of RUBRIK, INC. on the open market

Open‑market sale worth $1.00M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 4 sales

THOMPSON JOHN WENDELL

Filed: 8/4/2026ACC: 0001207433-26-000018

InsiderTHOMPSON JOHN WENDELLCIK 1207433

→

IssuerRUBRIK, INC.CIK 1943896

Director

Since Mar 2026

-13.50K

Net shares

Net seller

$1.00M

Total sold

Open market trades

0B · 4S

Total transactions

22K acquired · 35.50K disposed

Non-Derivative Transactions5

Class A Common Stock

Indirect

S · Sale

−1.50K

Price / share

$73.79

Trade value

$110.69K

% of position

12.0%

8/3/2026

12.50K→11K

Class A Common Stock

Indirect

S · Sale

−1K

Price / share

$74.59

Trade value

$74.59K

% of position

9.1%

8/3/2026

11K→10K

Class A Common Stock

Direct

C · Conversion

+11K

Price / share

—

Trade value

—

% of position

131.5%

8/3/2026

8.36K→19.36K

Class A Common Stock

Direct

S · Sale

−5.74K

Price / share

$73.73

Trade value

$423.21K

% of position

29.6%

8/3/2026

19.36K→13.62K

Class A Common Stock

Direct

S · Sale

−5.26K

Price / share

$74.51

Trade value

$391.92K

% of position

38.6%

8/3/2026

13.62K→8.36K

Total

Net shares

−2.50K

Net value

-$1M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Indirect	8/3/2026	S · Sale	−1.50K	$73.79	$110.69K	12.0%	12.50K	11K
Class A Common Stock Indirect	8/3/2026	S · Sale	−1K	$74.59	$74.59K	9.1%	11K	10K
Class A Common Stock Direct	8/3/2026	C · Conversion	+11K	—	—	131.5%	8.36K	19.36K
Class A Common Stock Direct	8/3/2026	S · Sale	−5.74K	$73.73	$423.21K	29.6%	19.36K	13.62K
Class A Common Stock Direct	8/3/2026	S · Sale	−5.26K	$74.51	$391.92K	38.6%	13.62K	8.36K
Total			−2.50K		-$1M

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

77.95K

Exercisable

—

8/3/2026

Class B Common Stock

Direct

M · Option Exercise

Converts to

Class A Common Stock

11K shares

+11K

Strike price

Held after

61K

Exercisable

—

8/3/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

11K shares

−11K

Strike price

Held after

50K

Exercisable

—

8/3/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (Right to Buy) Direct	Class B Common Stock11K shares	8/3/2026	M · Option Exercise	−11K	4.38	—	77.95K
Class B Common Stock Direct	Class A Common Stock11K shares	8/3/2026	M · Option Exercise	+11K		—	61K
Class B Common Stock Direct	Class A Common Stock11K shares	8/3/2026	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