RBRK
Rubrik, Inc.
124.20$
-7.1%
vs. previous close
Closing price · As of: Oct 30, 2026
Ownership
Ownership Structure
Who owns Rubrik, Inc. (RBRK)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 97.8% of the shares are freely tradable; institutional investors hold 76.9%.
Institutional ownership
?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
76.9%
Insiders
?Share of the stock held by the executives, founders and major shareholders of the company itself.
2.4%
Float
?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
97.8%
Short % of float
?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
7.9%
Shares Outstanding
?Total number of shares issued. Price times share count gives market cap.
161Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 4.82 | 9,990,174 | +13.3 | 06/30/2026 |
| AQR Capital Management LLC | 4.80 | 9,947,988 | +348.7 | 06/30/2026 |
| FMR Inc | 4.44 | 9,202,121 | +11.4 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 4.00 | 8,301,380 | +3.4 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.32 | 6,885,243 | +5.0 | 06/30/2026 |
| First Trust Advisors L.P. | 2.88 | 5,980,251 | +22.2 | 06/30/2026 |
| NORGES BANK | 1.96 | 4,069,424 | -10.0 | 06/30/2026 |
| VOYA INVESTMENT MANAGEMENT LLC | 1.93 | 4,004,750 | +7.2 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.34 | 4,855,378 | +2.2 | 09/30/2026 |
| First Trust NASDAQ Cybersecurity ETF | 1.96 | 4,063,687 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Choudary Kiran Kumar | Chief Financial Officer | 958,078 | 118,993,288 $ | Sep 17, 2026 | direct |
| Mhatre Ravi | Director | 733,413 | 91,089,895 $ | Jul 10, 2026 | both |
| Sinha Bipul | Chairman of the Board and CEO | 556,652 | 69,136,178 $ | Sep 24, 2026 | both |
| Nithrakashyap Arvind | Chief Technology Officer | 272,538 | 33,849,220 $ | Oct 7, 2026 | direct |
| Thompson John Wendell | Director | 13,362 | 1,659,560 $ | Oct 1, 2026 | both |
| Russak-Aminoach Rakefet | Director | 10,304 | 1,279,757 $ | Aug 26, 2026 | direct |
| Wassenaar Yvonne | Director | 2,988 | 371,110 $ | Oct 5, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 7, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 13 | 125.57 | 1,632 |
| Oct 7, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3,055 | 124.79 | 381,233 |
| Oct 7, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 8,274 | 124.05 | 1,026,390 |
| Oct 7, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 1,478 | 123.32 | 182,267 |
| Oct 7, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Other | 12,820 | 0.00 | – |
| Oct 6, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 68 | 127.70 | 8,684 |
| Oct 6, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 1,069 | 126.87 | 135,624 |
| Oct 6, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 11,101 | 126.14 | 1,400,280 |
| Oct 6, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 582 | 125.35 | 72,954 |
| Oct 6, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Other | 12,820 | 0.00 | – |
| Oct 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 2,913 | 123.80 | 360,629 |
| Oct 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 5,600 | 122.99 | 688,744 |
| Oct 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 2,801 | 121.95 | 341,582 |
| Oct 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 901 | 121.20 | 109,201 |
| Oct 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 110 | 120.26 | 13,229 |
| Oct 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 495 | 118.92 | 58,865 |
| Oct 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Other | 2,501 | 0.00 | – |
| Oct 5, 2026 | Wassenaar Yvonne | Director | Sell | 721 | 119.00 | 85,799 |
| Oct 1, 2026 | Thompson John Wendell | Director | Sell | 2,394 | 116.46 | 278,805 |
| Oct 1, 2026 | Thompson John Wendell | Director | Sell | 7,710 | 115.57 | 891,045 |
| Oct 1, 2026 | Thompson John Wendell | Director | Sell | 896 | 114.71 | 102,780 |
| Oct 1, 2026 | Thompson John Wendell | Director | Other | 11,000 | 0.00 | – |
| Oct 1, 2026 | Thompson John Wendell | Director | Sell | 500 | 116.47 | 58,235 |
| Oct 1, 2026 | Thompson John Wendell | Director | Sell | 1,700 | 115.62 | 196,554 |
| Oct 1, 2026 | Thompson John Wendell | Director | Sell | 300 | 114.68 | 34,404 |
| Sep 25, 2026 | Sinha Bipul | Chairman of the Board and CEO | Other | 55,000 | 0.00 | – |
| Sep 24, 2026 | Sinha Bipul | Chairman of the Board and CEO | Other | 55,000 | – | – |
| Sep 24, 2026 | Sinha Bipul | Chairman of the Board and CEO | Other | 500,000 | – | – |
| Sep 17, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 2,572 | 108.05 | 277,905 |
| Sep 17, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 2,728 | 107.42 | 293,042 |
| Sep 17, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 300 | 105.98 | 31,794 |
| Sep 17, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 200 | 103.86 | 20,772 |
| Sep 15, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Other | 13,995 | 100.20 | 1,402,299 |
| Sep 15, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 400 | 103.48 | 41,392 |
| Sep 15, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 700 | 102.72 | 71,904 |
| Sep 15, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 1,214 | 101.47 | 123,185 |
| Sep 15, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 586 | 100.20 | 58,717 |
| Sep 15, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 1,100 | 99.08 | 108,988 |
| Sep 15, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Other | 4,000 | 0.00 | – |
| Sep 15, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Other | 10,436 | 100.20 | 1,045,687 |
| Sep 10, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 2,321 | 91.67 | 212,766 |
| Sep 10, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 4,675 | 90.88 | 424,864 |
| Sep 10, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 4,844 | 89.73 | 434,652 |
| Sep 10, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 611 | 89.12 | 54,452 |
| Sep 10, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 369 | 87.55 | 32,306 |
| Sep 10, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Other | 12,820 | 0.00 | – |
| Sep 9, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 30 | 92.87 | 2,786 |
| Sep 9, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 1,013 | 92.08 | 93,277 |
| Sep 9, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3,237 | 91.16 | 295,085 |
| Sep 9, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 5,297 | 90.41 | 478,902 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.