Rubrik
RBRK
472 hedge funds and large institutions have $8.83B invested in Rubrik in 2025 Q4 according to their latest regulatory filings, with 118 funds opening new positions, 183 increasing their positions, 124 reducing their positions, and 76 closing their positions.
143% more funds holding in top 10
Funds holding in top 10: 7 → 17 (+10)
55% more first-time investments, than exits
New positions opened: 118 | Existing positions closed: 76
48% more call options, than puts
Call options by funds: $474M | Put options by funds: $320M
48% more repeat investments, than reductions
Existing positions increased: 183 | Existing positions reduced: 124
8% more funds holding
Funds holding: 436 → 472 (+36)
3.94% more ownership
Funds ownership: 72.13% → 76.07% (+3.9%)
5% more capital invested
Capital invested by funds: $8.43B → $8.83B (+$403M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$203M |
| 2 |
First Trust Advisors
Wheaton,
Illinois
|
+$162M |
| 3 |
Vanguard Group
Malvern,
Pennsylvania
|
+$129M |
| 4 |
BlackRock
New York
|
+$122M |
| 5 |
1832 Asset Management
Toronto,
Ontario, Canada
|
+$78.4M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$161M |
| 2 |
UBS Group
Zurich,
Switzerland
|
-$95.1M |
| 3 |
BCVI
Bain Capital Venture Investors
Boston,
Massachusetts
|
-$53.7M |
| 4 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$49.3M |
| 5 |
EQF
Evergreen Quality Fund
Grand Cayman,
Cayman Islands
|
-$48.7M |
RBRK Hedge Fund Activity: Q4 2025 in Review
472 of the 8,267 institutional investors tracked by Wall St. Rank reported a position in Rubrik (RBRK) for Q4 2025, worth a combined $8.83B — up 4.8% from $8.43B a quarter earlier.
Buyers outnumbered sellers: 118 funds opened new RBRK positions and 76 closed out — a net gain of 42 holders — while 183 added to existing stakes and 124 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $203M. The largest seller was Citadel Advisors, cutting an estimated $161M.
- 472 institutional investors held Rubrik (RBRK) as of Q4 2025, up from 436 in Q3 2025.
- Funds reported $8.83B of Rubrik stock for Q4 2025, up 4.8% quarter-over-quarter.
- 118 funds opened new Rubrik positions in Q4 2025 and 76 closed out, a net change of +42 holders.
- The largest Rubrik buyer in Q4 2025 was Fidelity Investments, an estimated $203M added.
- The largest Rubrik seller in Q4 2025 was Citadel Advisors, an estimated $161M sold.
Based on aggregated 13F filings for Q4 2025.