$RBRK

$133.40 +$4.66 (3.62%) Close

$RBRK Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 206.1M shares outstanding

Who owns RBRK?

By type of holder

Institutions 62.9% Insiders 0.0% Everyone else 37.1%

Concentration Top 10 holders own 35.9%

Bipul Sinha 6.7% · BlackRock, Inc. 4.9%

Institutional ownership

62.9%

+6.7 pts vs last qtr

Institutional holders

571

+104 vs last qtr

Net shares bought

+13.9M

by institutions in Q2 2026

New / sold out

184 / 80

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Aqr Capital Management LLC +7.7M
Norges Bank NEW +4.1M

Biggest sellers in Q2 2026

PointState Capital LP −1.8M
Two Sigma Investments, LP −1.8M

Who is planning to sell?

Notices of proposed sale, last 12 months

$143M

32 notices from 20 people

Shares covered

1.6M

0.79% of the company

Arranged in advance

42%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Bipul Sinha Officer $56.9M
Arvind Nithrakashyap Officer $40.6M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2023–FY2026

+229.7%

+48.84% a year

Each share's claim on the business

−69.7%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$6K vs $1.26B

over 4 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years75% Under 1 year25%

Quarterly turnover

22.7%

of institutional shares changed hands

Top 10 managers, median time held

2 years

Super Investors

Investment managers reporting RBRK on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	10.0M	4.85%	+1.2M (+13.3%)	2024	0.0%
Shares held by quarter Peak holding11.7M (Q4'25) Change over 8 quarters+8.7M Share of the company4.850% BlackRock, Inc.'s full portfolio →
AC Aqr Capital Management LLC	9.9M	4.83%	+7.7M (+348.7%)	Q3 '25	0.3%
Shares held by quarter Peak holding9.9M (Q2'26) Change over 8 quarters+9.9M Share of the company4.830% Aqr Capital Management LLC's full portfolio →

BlackRock, Inc.

10.0M

% of company

4.85%

Change vs last qtr

+1.2M (+13.3%)

Held since

2024

Aqr Capital Management LLC

9.9M

% of company

4.83%

Change vs last qtr

+7.7M (+348.7%)

Held since

Q3 '25

28 more super investors behind a free account

See every manager holding Rubrik, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting RBRK on Form N-PORT; together they hold 25.6% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$381M	4.7M	2.30%	0.02%	June 30, 2026
FT First Trust Nasdaq Cybersecurity ETF First Trust Exchange-Traded Fund II	$369M	4.6M	2.23%	2.67%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$381M

% of company

2.30%

% of the fund

0.02%

As of

June 30, 2026

First Trust Nasdaq Cybersecurity ETF

First Trust Exchange-Traded Fund II

Position value

$369M

% of company

2.23%

% of the fund

2.67%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Rubrik, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
BS Bipul Sinha 5%+ holder 13D · 8.9%	13.8M	6.69%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company6.690% Disclosed stake13D · 8.9% View the 13D/G filing →

Bipul Sinha

5%+ holder13D · 8.9%

13.8M

% of company

6.69%

Change vs last qtr

—

Held since

—

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