Rubrik
RBRK
436 hedge funds and large institutions have $8.43B invested in Rubrik in 2025 Q3 according to their latest regulatory filings, with 132 funds opening new positions, 177 increasing their positions, 81 reducing their positions, and 81 closing their positions.
119% more repeat investments, than reductions
Existing positions increased: 177 | Existing positions reduced: 81
63% more first-time investments, than exits
New positions opened: 132 | Existing positions closed: 81
12% more funds holding
Funds holding: 389 → 436 (+47)
7% less call options, than puts
Call options by funds: $395M | Put options by funds: $426M
6% less capital invested
Capital invested by funds: $8.93B → $8.43B (-$500M)
63% less funds holding in top 10
Funds holding in top 10: 19 → 7 (-12)
70.45% less ownership
Funds ownership: 142.58% → 72.13% (-70%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$152M |
| 2 |
PC
PointState Capital
New York
|
+$146M |
| 3 |
Pictet Asset Management
Carouge,
Switzerland
|
+$112M |
| 4 |
Federated Hermes
Pittsburgh,
Pennsylvania
|
+$106M |
| 5 |
AQR Capital Management
Greenwich,
Connecticut
|
+$102M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
D.E. Shaw & Co
New York
|
-$278M |
| 2 |
Voloridge Investment Management
Jupiter,
Florida
|
-$110M |
| 3 |
Two Sigma Investments
New York
|
-$92.5M |
| 4 |
Teacher Retirement System of Texas
Austin,
Texas
|
-$86.9M |
| 5 |
Acadian Asset Management
Boston,
Massachusetts
|
-$85.9M |
RBRK Hedge Fund Activity: Q3 2025 in Review
436 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Rubrik (RBRK) for Q3 2025, worth a combined $8.43B — down 5.6% from $8.93B a quarter earlier.
Buyers outnumbered sellers: 132 funds opened new RBRK positions and 81 closed out — a net gain of 51 holders — while 177 added to existing stakes and 81 trimmed.
The largest buyer was BlackRock, adding an estimated $152M. The largest seller was D.E. Shaw & Co, cutting an estimated $278M.
- 436 institutional investors held Rubrik (RBRK) as of Q3 2025, up from 389 in Q2 2025.
- Funds reported $8.43B of Rubrik stock for Q3 2025, down 5.6% quarter-over-quarter.
- 132 funds opened new Rubrik positions in Q3 2025 and 81 closed out, a net change of +51 holders.
- The largest Rubrik buyer in Q3 2025 was BlackRock, an estimated $152M added.
- The largest Rubrik seller in Q3 2025 was D.E. Shaw & Co, an estimated $278M sold.
Based on aggregated 13F filings for Q3 2025.