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

Open‑market sale worth $660.3K — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 4 sales

THOMPSON JOHN WENDELL

Filed: 4/2/2026ACC: 0001207433-26-000010

InsiderTHOMPSON JOHN WENDELLCIK 1207433

→

IssuerRUBRIK, INC.CIK 1943896

Director

Since Mar 2026

-13.50K

Net shares

Net seller

$660.3K

Total sold

Open market trades

0B · 4S

Total transactions

22K acquired · 35.50K disposed

Non-Derivative Transactions5

Class A Common Stock

Indirect

S · Sale

−2.40K

Price / share

$48.93

Trade value

$117.43K

% of position

10.7%

4/1/2026

22.50K→20.10K

Class A Common Stock

Indirect

S · Sale

−100.00

Price / share

$49.60

Trade value

$4.96K

% of position

0.5%

4/1/2026

20.10K→20K

Class A Common Stock

Direct

C · Conversion

+11K

Price / share

—

Trade value

—

% of position

236.4%

4/1/2026

4.65K→15.65K

Class A Common Stock

Direct

S · Sale

−5.35K

Price / share

$48.57

Trade value

$260.04K

% of position

34.2%

4/1/2026

15.65K→10.30K

Class A Common Stock

Direct

S · Sale

−5.65K

Price / share

$49.22

Trade value

$277.90K

% of position

54.8%

4/1/2026

10.30K→4.65K

Total

Net shares

−2.50K

Net value

-$660.33K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Indirect	4/1/2026	S · Sale	−2.40K	$48.93	$117.43K	10.7%	22.50K	20.10K
Class A Common Stock Indirect	4/1/2026	S · Sale	−100.00	$49.60	$4.96K	0.5%	20.10K	20K
Class A Common Stock Direct	4/1/2026	C · Conversion	+11K	—	—	236.4%	4.65K	15.65K
Class A Common Stock Direct	4/1/2026	S · Sale	−5.35K	$48.57	$260.04K	34.2%	15.65K	10.30K
Class A Common Stock Direct	4/1/2026	S · Sale	−5.65K	$49.22	$277.90K	54.8%	10.30K	4.65K
Total			−2.50K		-$660.33K

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

121.95K

Exercisable

—

4/1/2026

Class B Common Stock

Direct

M · Option Exercise

Converts to

Class A Common Stock

11K shares

+11K

Strike price

Held after

61K

Exercisable

—

4/1/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

11K shares

−11K

Strike price

Held after

50K

Exercisable

—

4/1/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (Right to Buy) Direct	Class B Common Stock11K shares	4/1/2026	M · Option Exercise	−11K	4.38	—	121.95K
Class B Common Stock Direct	Class A Common Stock11K shares	4/1/2026	M · Option Exercise	+11K		—	61K
Class B Common Stock Direct	Class A Common Stock11K shares	4/1/2026	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