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Of the 14 tracked institutions holding RBRK, 7 have a 3-year clone track record — 5 of them beat the S&P. Average holder's clone alpha: +3.5pt. It's a gauge of who owns the name, not just how many.
Among the 14 tracked institutional investors we monitor, RBRK (RUBRIK INC.) is held with a combined value of $3.97B across 50,440,059 shares. The largest holder is VANGUARD GROUP INC with a position worth $1.12B (0.02% of their portfolio). 12 funds increased their holdings. 2 funds reduced their position.
Total Institutional Value
$3.97B
Total Shares Held
50,440,059
Institutional Holders
14
Days to Cover
4.2+17.3%
14.97M shares short · FINRA 2026-08-14
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $1.12B | 0.02% | +12.9% |
| 2 | BlackRock, Inc. | $802.01M | 0.01% | +13.3% |
| 3 | AQR CAPITAL MANAGEMENT LLC | $780.12M | 0.27% | +348.7% |
| 4 | FMR LLC | $738.75M | 0.03% | +11.4% |
| 5 | STATE STREET CORP | $229.71M | 0.01% | +11.5% |
| 6 | PRICE T ROWE ASSOCIATES INC /MD/ | $93.78M | 0.01% | +31.6% |
| 7 | WELLINGTON MANAGEMENT GROUP LLP | $58.74M | 0.01% | +48.8% |
| 8 | RENAISSANCE TECHNOLOGIES LLC | $40.88M | 0.06% | +34.9% |
| 9 | BAILLIE GIFFORD & CO | $31.15M | 0.03% | +135.0% |
| 10 | ARK Investment Management LLC | $29.34M | 0.19% | -7.5% |
As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of RBRK with a position worth $1.12B, representing 0.02% of their portfolio. In total, 14 institutional investors hold RBRK with a combined value of $3.97B.
Institutional investors hold $3.97B worth of RBRK stock across 14 positions. The largest institutional holder is VANGUARD GROUP INC with $1.12B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For RBRK, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their RBRK positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| 2026-08-13 |
| 5.0% | 2026-07-31 |
SEC Schedule 13D (activist) and 13G (passive) filings for RBRK. Filed when an investor acquires 5%+ ownership.
Last Close
$88.82
2026-09-09
YTD
+17.7%
71% of 52-week range