RBRK
Rubrik, Inc.
107.80$
+2.7%
vs. previous close
Closing price · As of: Sep 17, 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.
9.2%
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 | 4.25 | 8,816,816 | -24.7 | 03/31/2026 |
| FMR Inc | 3.99 | 8,261,391 | +56.7 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 3.87 | 8,029,608 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.16 | 6,555,111 | +0.0 | 03/31/2026 |
| 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 | 1.80 | 3,736,521 | -2.4 | 03/31/2026 |
| PointState Capital LP | 1.76 | 3,646,244 | +73.6 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| First Trust NASDAQ Cybersecurity ETF | 2.32 | 4,809,263 | +0.2 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.30 | 4,763,942 | +0.3 | 07/31/2026 |
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 | 978,073 | 105,436,269 $ | Aug 24, 2026 | direct |
| Mhatre Ravi | Director | 733,413 | 79,061,921 $ | Jul 10, 2026 | both |
| Nithrakashyap Arvind | Chief Technology Officer | 293,293 | 31,616,985 $ | Sep 10, 2026 | direct |
| Thompson John Wendell | Director | 16,262 | 1,753,044 $ | Sep 1, 2026 | both |
| Russak-Aminoach Rakefet | Director | 10,304 | 1,110,771 $ | Aug 26, 2026 | direct |
| Wassenaar Yvonne | Director | 3,709 | 399,830 $ | Sep 3, 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 |
|---|---|---|---|---|---|---|
| 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 |
| Sep 9, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3,243 | 89.33 | 289,697 |
| Sep 9, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Other | 12,820 | 0.00 | – |
| Sep 8, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 2,217 | 91.95 | 203,853 |
| Sep 8, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 7,836 | 91.47 | 716,759 |
| Sep 8, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 2,767 | 90.43 | 250,220 |
| Sep 8, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Other | 12,820 | 0.00 | – |
| Sep 3, 2026 | Wassenaar Yvonne | Director | Sell | 721 | 89.52 | 64,544 |
| Sep 3, 2026 | Wassenaar Yvonne | Director | Other | 513 | 0.00 | – |
| Sep 1, 2026 | Thompson John Wendell | Director | Sell | 900 | 91.08 | 81,972 |
| Sep 1, 2026 | Thompson John Wendell | Director | Sell | 4,700 | 89.02 | 418,394 |
| Sep 1, 2026 | Thompson John Wendell | Director | Sell | 4,600 | 88.34 | 406,364 |
| Sep 1, 2026 | Thompson John Wendell | Director | Other | 11,000 | 0.00 | – |
| Sep 1, 2026 | Thompson John Wendell | Director | Sell | 200 | 92.37 | 18,474 |
| Sep 1, 2026 | Thompson John Wendell | Director | Sell | 100 | 90.30 | 9,030 |
| Sep 1, 2026 | Thompson John Wendell | Director | Sell | 600 | 90.24 | 54,144 |
| Sep 1, 2026 | Thompson John Wendell | Director | Sell | 1,600 | 88.58 | 141,728 |
| Aug 26, 2026 | Russak-Aminoach Rakefet | Director | Other | 10,304 | 0.00 | – |
| Aug 24, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 300 | 99.93 | 29,979 |
| Aug 24, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 5,300 | 98.65 | 522,845 |
| Aug 24, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 4,400 | 97.81 | 430,364 |
| Aug 24, 2026 | Choudary Kiran Kumar | Chief Financial Officer | Other | 4,000 | 0.00 | – |
| Aug 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 521 | 84.61 | 44,082 |
| Aug 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 8,177 | 84.10 | 687,686 |
| Aug 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 2,780 | 83.17 | 231,213 |
| Aug 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 1,342 | 82.08 | 110,151 |
| Aug 5, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Other | 12,820 | 0.00 | – |
| Aug 4, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 4,557 | 80.94 | 368,844 |
| Aug 4, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3,767 | 79.81 | 300,644 |
| Aug 4, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 2,981 | 79.11 | 235,827 |
| Aug 4, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 1,303 | 77.99 | 101,621 |
| Aug 4, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 212 | 76.77 | 16,275 |
| Aug 4, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Other | 12,820 | 0.00 | – |
| Aug 3, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 5,178 | 74.52 | 385,865 |
| Aug 3, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 7,642 | 73.72 | 563,368 |
| Aug 3, 2026 | Nithrakashyap Arvind | Chief Technology Officer | Other | 2,502 | 0.00 | – |
| Aug 3, 2026 | Wassenaar Yvonne | Director | Sell | 721 | 75.00 | 54,075 |
| Aug 3, 2026 | Thompson John Wendell | Director | Sell | 5,260 | 74.51 | 391,923 |
| Aug 3, 2026 | Thompson John Wendell | Director | Sell | 5,740 | 73.73 | 423,210 |
| Aug 3, 2026 | Thompson John Wendell | Director | Other | 11,000 | 0.00 | – |
| Aug 3, 2026 | Thompson John Wendell | Director | Sell | 1,000 | 74.59 | 74,590 |
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: September 17, 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.