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 $3.49M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 13 sales

NITHRAKASHYAP ARVIND

Filed: 9/11/2026ACC: 0002019143-26-000019

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

$3.49M

Total sold

Open market trades

0B · 13S

Total transactions

38.46K acquired · 76.92K disposed

Non-Derivative Transactions16

Class A Common Stock

Direct

C · Conversion

+12.82K

Price / share

—

Trade value

—

% of position

4.4%

9/8/2026

293.29K→306.11K

Class A Common Stock

Direct

S · Sale

−2.77K

Price / share

$90.43

Trade value

$250.22K

% of position

0.9%

9/8/2026

306.11K→303.35K

Class A Common Stock

Direct

S · Sale

−7.84K

Price / share

$91.47

Trade value

$716.76K

% of position

2.6%

9/8/2026

303.35K→295.51K

Class A Common Stock

Direct

S · Sale

−2.22K

Price / share

$91.95

Trade value

$203.85K

% of position

0.8%

9/8/2026

295.51K→293.29K

Class A Common Stock

Direct

C · Conversion

+12.82K

Price / share

—

Trade value

—

% of position

4.4%

9/9/2026

293.29K→306.11K

Class A Common Stock

Direct

S · Sale

−3.24K

Price / share

$89.33

Trade value

$289.70K

% of position

1.1%

9/9/2026

306.11K→302.87K

Class A Common Stock

Direct

S · Sale

−5.30K

Price / share

$90.41

Trade value

$478.90K

% of position

1.7%

9/9/2026

302.87K→297.57K

Class A Common Stock

Direct

S · Sale

−3.24K

Price / share

$91.16

Trade value

$295.08K

% of position

1.1%

9/9/2026

297.57K→294.34K

Class A Common Stock

Direct

S · Sale

−1.01K

Price / share

$92.08

Trade value

$93.28K

% of position

0.3%

9/9/2026

294.34K→293.32K

Class A Common Stock

Direct

S · Sale

−30.00

Price / share

$92.87

Trade value

$2.79K

% of position

0.0%

9/9/2026

293.32K→293.29K

Class A Common Stock

Direct

C · Conversion

+12.82K

Price / share

—

Trade value

—

% of position

4.4%

9/10/2026

293.29K→306.11K

Class A Common Stock

Direct

S · Sale

−369.00

Price / share

$87.55

Trade value

$32.31K

% of position

0.1%

9/10/2026

306.11K→305.74K

Class A Common Stock

Direct

S · Sale

−611.00

Price / share

$89.12

Trade value

$54.45K

% of position

0.2%

9/10/2026

305.74K→305.13K

Class A Common Stock

Direct

S · Sale

−4.84K

Price / share

$89.73

Trade value

$434.65K

% of position

1.6%

9/10/2026

305.13K→300.29K

Class A Common Stock

Direct

S · Sale

−4.67K

Price / share

$90.88

Trade value

$424.86K

% of position

1.6%

9/10/2026

300.29K→295.61K

Class A Common Stock

Direct

S · Sale

−2.32K

Price / share

$91.67

Trade value

$212.77K

% of position

0.8%

9/10/2026

295.61K→293.29K

Total

Net shares

+0.00

Net value

-$3.49M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	9/8/2026	C · Conversion	+12.82K	—	—	4.4%	293.29K	306.11K
Class A Common Stock Direct	9/8/2026	S · Sale	−2.77K	$90.43	$250.22K	0.9%	306.11K	303.35K
Class A Common Stock Direct	9/8/2026	S · Sale	−7.84K	$91.47	$716.76K	2.6%	303.35K	295.51K
Class A Common Stock Direct	9/8/2026	S · Sale	−2.22K	$91.95	$203.85K	0.8%	295.51K	293.29K
Class A Common Stock Direct	9/9/2026	C · Conversion	+12.82K	—	—	4.4%	293.29K	306.11K
Class A Common Stock Direct	9/9/2026	S · Sale	−3.24K	$89.33	$289.70K	1.1%	306.11K	302.87K
Class A Common Stock Direct	9/9/2026	S · Sale	−5.30K	$90.41	$478.90K	1.7%	302.87K	297.57K
Class A Common Stock Direct	9/9/2026	S · Sale	−3.24K	$91.16	$295.08K	1.1%	297.57K	294.34K
Class A Common Stock Direct	9/9/2026	S · Sale	−1.01K	$92.08	$93.28K	0.3%	294.34K	293.32K
Class A Common Stock Direct	9/9/2026	S · Sale	−30.00	$92.87	$2.79K	0.0%	293.32K	293.29K
Class A Common Stock Direct	9/10/2026	C · Conversion	+12.82K	—	—	4.4%	293.29K	306.11K
Class A Common Stock Direct	9/10/2026	S · Sale	−369.00	$87.55	$32.31K	0.1%	306.11K	305.74K
Class A Common Stock Direct	9/10/2026	S · Sale	−611.00	$89.12	$54.45K	0.2%	305.74K	305.13K
Class A Common Stock Direct	9/10/2026	S · Sale	−4.84K	$89.73	$434.65K	1.6%	305.13K	300.29K
Class A Common Stock Direct	9/10/2026	S · Sale	−4.67K	$90.88	$424.86K	1.6%	300.29K	295.61K
Class A Common Stock Direct	9/10/2026	S · Sale	−2.32K	$91.67	$212.77K	0.8%	295.61K	293.29K
Total			+0.00		-$3.49M

Derivative Transactions3

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

12.82K shares

−12.82K

Strike price

Held after

10.05M

Exercisable

—

9/8/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

12.82K shares

−12.82K

Strike price

Held after

10.04M

Exercisable

—

9/9/2026

Class B Common Stock

Direct

C · Conversion

Converts to

Class A Common Stock

12.82K shares

−12.82K

Strike price

Held after

10.03M

Exercisable

—

9/10/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Class B Common Stock Direct	Class A Common Stock12.82K shares	9/8/2026	C · Conversion	−12.82K	—	10.05M
Class B Common Stock Direct	Class A Common Stock12.82K shares	9/9/2026	C · Conversion	−12.82K	—	10.04M
Class B Common Stock Direct	Class A Common Stock12.82K shares	9/10/2026	C · Conversion	−12.82K	—	10.03M

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