Rubrik, Inc.
Rubrik, Inc. (RBRK) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · RBRK · as of Sep 30, 2025
Ownership Breakdown
476
Institutional Holders
▲ 57 vs Q2
$8.43B
Total Inst. Value
▼ $507.40M vs Q2
205.81M
Shares Outstanding
freeFloat 76.48%
103.49M
13F Shares Held
▲ 2.70M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
RBRK largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC services-prepackaged software | 13.02M | 6.68% | 6.68% | $1.07T | Nov 7, 2025 | ▲ 993.6K |
BLACKROCK, INC. services-prepackaged software | 10.13M | 5.20% | 5.20% | $832.94B | Nov 12, 2025 | ▲ 1.77M |
FIRST TRUST ADVISORS LP services-prepackaged software | 4.95M | 2.54% | 2.54% | $406.96B | Nov 12, 2025 | ▲ 485.1K |
VOYA INVESTMENT MANAGEMENT LLC services-prepackaged software | 3.57M | 1.83% | 1.83% | $293.55B | Oct 9, 2025 | ▲ 543.9K |
CITADEL ADVISORS LLC services-prepackaged software | 2.68M | 1.37% | 1.37% | $220.37B | Nov 14, 2025 | ▲ 1.00M |
FMR LLC services-prepackaged software | 2.62M | 1.34% | 1.34% | $215.44B | Nov 13, 2025 | ▼ 350.4K |
FEDERATED HERMES, INC. services-prepackaged software | 2.44M | 1.25% | 1.25% | $200.51B | Nov 3, 2025 | ▲ 1.23M |
GEODE CAPITAL MANAGEMENT, LLC services-prepackaged software | 2.35M | 1.21% | 1.21% | $193.77B | Nov 12, 2025 | ▲ 400.9K |
STATE STREET CORP services-prepackaged software | 2.08M | 1.07% | 1.07% | $171.31B | Nov 14, 2025 | ▲ 311.3K |
UBS GROUP AG services-prepackaged software | 1.88M | 96.37% | 96.37% | $154.47B | Nov 13, 2025 | ▲ 1.06M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
31
Increased
+19.52M shares2
New Positions
first time holders13
Decreased
−7.05M shares0
Sold Out
fully exitedNet shares change (top 50)
+12.47M
+19.52M / −7.05M
Net new holders
+20
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
RBRK insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
20
Buy transactions
55
Sell transactions
0.36
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Chandna Asheem director | Jun 3, 2026 | Award | 3,709 | — | — | 6.2K | Form 4 ↗ |
MCLAUGHLIN MARK D director | Jun 3, 2026 | Award | 3,709 | — | — | 20.0K | Form 4 ↗ |
Mhatre Ravi director | Jun 3, 2026 | Award | 3,709 | — | — | 101.6K | Form 4 ↗ |
Wassenaar Yvonne director | Jun 3, 2026 | C-Conversion | 721 | — | — | 33.1K | Form 4 ↗ |
Wassenaar Yvonne director | Jun 3, 2026 | Award | 3,709 | — | — | 6.0K | Form 4 ↗ |
Wassenaar Yvonne director | Jun 3, 2026 | C-Conversion | 721 | — | — | 3.0K | Form 4 ↗ |
Wassenaar Yvonne director | Jun 3, 2026 | Sale | 721 | $80.73 | $58.2K | 2.3K | Form 4 ↗ |
THOMPSON JOHN WENDELL director | Jun 1, 2026 | C-Conversion | 11,000 | — | — | 50.0K | Form 4 ↗ |
THOMPSON JOHN WENDELL director | Jun 1, 2026 | Sale | 100 | $79.91 | $8.0K | 17.4K | Form 4 ↗ |
THOMPSON JOHN WENDELL director | Jun 1, 2026 | Sale | 300 | $82.45 | $24.7K | 17.1K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Rubrik, Inc. (RBRK) is primarily owned by institutional investors, who hold approximately 50.3% of total shares outstanding. Company insiders own approximately 23.52%, while retail and public investors account for the remaining 26.19%.
The largest institutional shareholder of Rubrik, Inc. is VANGUARD GROUP INC, holding approximately 13.02 million shares — equal to 6.68% of outstanding shares — as of September 30, 2025.
A total of 476 institutional investors currently hold RBRK stock, with a combined institutional value of approximately $8.43 billion as of the most recent 13F filing period.
Frequently asked questions
RBRK ownershipRubrik, Inc. (RBRK) is primarily owned by institutional investors, who hold approximately 50.3% of shares. The largest shareholder is VANGUARD GROUP INC with a 6.68% stake. Company insiders hold 23.52%. Data sourced from SEC Form 13F as of September 30, 2025.