NITHRAKASHYAP ARVIND (Chief Technology Officer) sold 11.6% of their position (38.46K shares) of RUBRIK, INC. on the open market

Open‑market sale worth $3.05M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 11 sales

NITHRAKASHYAP ARVIND

Filed: 8/5/2026ACC: 0002019143-26-000017

InsiderNITHRAKASHYAP ARVINDCIK 2019143

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IssuerRUBRIK, INC.CIK 1943896

DirectorOfficer10% Owner· Chief Technology Officer

Since Apr 2024

-38.46K

Net shares

Net seller

$3.05M

Total sold

Open market trades

0B · 11S

Total transactions

28.14K acquired · 66.60K disposed

Non-Derivative Transactions14

Class A Common Stock

Direct

C · Conversion

+2.50K

Price / share

—

Trade value

—

% of position

0.8%

8/3/2026

303.61K→306.11K

Class A Common Stock

Direct

S · Sale

−7.64K

Price / share

$73.72

Trade value

$563.37K

% of position

2.5%

8/3/2026

306.11K→298.47K

Class A Common Stock

Direct

S · Sale

−5.18K

Price / share

$74.52

Trade value

$385.86K

% of position

1.7%

8/3/2026

298.47K→293.29K

Class A Common Stock

Direct

C · Conversion

+12.82K

Price / share

—

Trade value

—

% of position

4.4%

8/4/2026

293.29K→306.11K

Class A Common Stock

Direct

S · Sale

−212.00

Price / share

$76.77

Trade value

$16.28K

% of position

0.1%

8/4/2026

306.11K→305.90K

Class A Common Stock

Direct

S · Sale

−1.30K

Price / share

$77.99

Trade value

$101.62K

% of position

0.4%

8/4/2026

305.90K→304.60K

Class A Common Stock

Direct

S · Sale

−2.98K

Price / share

$79.11

Trade value

$235.83K

% of position

1.0%

8/4/2026

304.60K→301.62K

Class A Common Stock

Direct

S · Sale

−3.77K

Price / share

$79.81

Trade value

$300.64K

% of position

1.2%

8/4/2026

301.62K→297.85K

Class A Common Stock

Direct

S · Sale

−4.56K

Price / share

$80.94

Trade value

$368.84K

% of position

1.5%

8/4/2026

297.85K→293.29K

Class A Common Stock

Direct

C · Conversion

+12.82K

Price / share

—

Trade value

—

% of position

4.4%

8/5/2026

293.29K→306.11K

Class A Common Stock

Direct

S · Sale

−1.34K

Price / share

$82.08

Trade value

$110.15K

% of position

0.4%

8/5/2026

306.11K→304.77K

Class A Common Stock

Direct

S · Sale

−2.78K

Price / share

$83.17

Trade value

$231.21K

% of position

0.9%

8/5/2026

304.77K→301.99K

Class A Common Stock

Direct

S · Sale

−8.18K

Price / share

$84.10

Trade value

$687.69K

% of position

2.7%

8/5/2026

301.99K→293.81K

Class A Common Stock

Direct

S · Sale

−521.00

Price / share

$84.61

Trade value

$44.08K

% of position

0.2%

8/5/2026

293.81K→293.29K

Total

Net shares

−10.32K

Net value

-$3.05M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	8/3/2026	C · Conversion	+2.50K	—	—	0.8%	303.61K	306.11K
Class A Common Stock Direct	8/3/2026	S · Sale	−7.64K	$73.72	$563.37K	2.5%	306.11K	298.47K
Class A Common Stock Direct	8/3/2026	S · Sale	−5.18K	$74.52	$385.86K	1.7%	298.47K	293.29K
Class A Common Stock Direct	8/4/2026	C · Conversion	+12.82K	—	—	4.4%	293.29K	306.11K
Class A Common Stock Direct	8/4/2026	S · Sale	−212.00	$76.77	$16.28K	0.1%	306.11K	305.90K
Class A Common Stock Direct	8/4/2026	S · Sale	−1.30K	$77.99	$101.62K	0.4%	305.90K	304.60K
Class A Common Stock Direct	8/4/2026	S · Sale	−2.98K	$79.11	$235.83K	1.0%	304.60K	301.62K
Class A Common Stock Direct	8/4/2026	S · Sale	−3.77K	$79.81	$300.64K	1.2%	301.62K	297.85K
Class A Common Stock Direct	8/4/2026	S · Sale	−4.56K	$80.94	$368.84K	1.5%	297.85K	293.29K
Class A Common Stock Direct	8/5/2026	C · Conversion	+12.82K	—	—	4.4%	293.29K	306.11K
Class A Common Stock Direct	8/5/2026	S · Sale	−1.34K	$82.08	$110.15K	0.4%	306.11K	304.77K
Class A Common Stock Direct	8/5/2026	S · Sale	−2.78K	$83.17	$231.21K	0.9%	304.77K	301.99K
Class A Common Stock Direct	8/5/2026	S · Sale	−8.18K	$84.10	$687.69K	2.7%	301.99K	293.81K
Class A Common Stock Direct	8/5/2026	S · Sale	−521.00	$84.61	$44.08K	0.2%	293.81K	293.29K
Total			−10.32K		-$3.05M

Derivative Transactions3

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

2.50K shares

−2.50K

Strike price

Held after

10.09M

Exercisable

—

8/3/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

12.82K shares

−12.82K

Strike price

Held after

10.08M

Exercisable

—

8/4/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

12.82K shares

−12.82K

Strike price

Held after

10.07M

Exercisable

—

8/5/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Class B Common Stock Direct	Class A Common Stock2.50K shares	8/3/2026	C · Conversion	−2.50K	—	10.09M
Class B Common Stock Direct	Class A Common Stock12.82K shares	8/4/2026	C · Conversion	−12.82K	—	10.08M
Class B Common Stock Direct	Class A Common Stock12.82K shares	8/5/2026	C · Conversion	−12.82K	—	10.07M

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

200K

Shares owned

200K

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

200K

Owned

200K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Class B Common Stock Indirect	Class A Common Stock		—	—	200K	200K
Total					200K	200K