Rambus
RMBS
461 hedge funds and large institutions have $6.22B invested in Rambus in 2025 Q2 according to their latest regulatory filings, with 89 funds opening new positions, 191 increasing their positions, 131 reducing their positions, and 39 closing their positions.
128% more first-time investments, than exits
New positions opened: 89 | Existing positions closed: 39
46% more repeat investments, than reductions
Existing positions increased: 191 | Existing positions reduced: 131
11% more funds holding
Funds holding: 414 → 461 (+47)
8% less capital inflows, than outflows
Capital inflows: $587M | Capital outflows: $637M
1.17% less ownership
Funds ownership: 91.6% → 90.43% (-1.2%)
46% less call options, than puts
Call options by funds: $35.8M | Put options by funds: $65.8M
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
EdgePoint Investment Group
Toronto,
Ontario, Canada
|
+$86.7M |
| 2 |
BlackRock
New York
|
+$40.9M |
| 3 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
+$37.7M |
| 4 |
Westwood Holdings Group
Dallas,
Texas
|
+$27.1M |
| 5 |
AQR Capital Management
Greenwich,
Connecticut
|
+$24.8M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$217M |
| 2 |
Invesco
Atlanta,
Georgia
|
-$118M |
| 3 |
American Century Companies
Kansas City,
Missouri
|
-$74.6M |
| 4 |
Vaughan Nelson Investment Management
Houston,
Texas
|
-$29.1M |
| 5 |
SG Americas Securities
New York
|
-$25.8M |
RMBS Hedge Fund Activity: Q2 2025 in Review
461 of the 7,627 institutional investors tracked by Wall St. Rank reported a position in Rambus (RMBS) for Q2 2025, worth a combined $6.22B — up 22% from $5.11B a quarter earlier.
Buyers outnumbered sellers: 89 funds opened new RMBS positions and 39 closed out — a net gain of 50 holders — while 191 added to existing stakes and 131 trimmed.
The largest buyer was EdgePoint Investment Group, adding an estimated $86.7M. The largest seller was T. Rowe Price Associates, cutting an estimated $217M.
- 461 institutional investors held Rambus (RMBS) as of Q2 2025, up from 414 in Q1 2025.
- Funds reported $6.22B of Rambus stock for Q2 2025, up 22% quarter-over-quarter.
- 89 funds opened new Rambus positions in Q2 2025 and 39 closed out, a net change of +50 holders.
- The largest Rambus buyer in Q2 2025 was EdgePoint Investment Group, an estimated $86.7M added.
- The largest Rambus seller in Q2 2025 was T. Rowe Price Associates, an estimated $217M sold.
Based on aggregated 13F filings for Q2 2025.