Who owns Rubrik, Inc., from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
Lightspeed Venture Partners IX, L.P.: 1.9% · 3,121,772 shares — Lightspeed General Partner IX, L.P.: 1.9% · 3,121,772 shares — Lightspeed Ultimate General Partner IX, Ltd.: 1.9% · 3,121,772 shares
AQR Capital Management, LLC: 6.2% · 9,948,468 shares — AQR Capital Management Holdings, LLC: 6.2% · 9,948,468 shares
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Sign up freeEvery institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of Rubrik, Inc. they hold. Together these 734 managers report 75.46% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | $1.12B | 14,694,503 | 0.02% | 7.13% | December 31, 2025 |
| BlackRock, Inc. | $802M | 9,990,174 | 0.01% | 4.85% | June 30, 2026 |
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Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 449 funds hold 27.13% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND | $381M | 0.02% | 2.30% | June 30, 2026 |
| First Trust Nasdaq Cybersecurity ETF | $369M | 2.67% | 2.23% | June 30, 2026 |
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