Rambus
RMBS
557 hedge funds and large institutions have $8.83B invested in Rambus in 2026 Q1 according to their latest regulatory filings, with 86 funds opening new positions, 188 increasing their positions, 207 reducing their positions, and 75 closing their positions.
85% more call options, than puts
Call options by funds: $49.5M | Put options by funds: $26.8M
15% more first-time investments, than exits
New positions opened: 86 | Existing positions closed: 75
2.33% more ownership
Funds ownership: 92.71% → 95.04% (+2.3%)
1% more funds holding
Funds holding: 553 → 557 (+4)
4% less capital invested
Capital invested by funds: $9.18B → $8.83B (-$350M)
9% less repeat investments, than reductions
Existing positions increased: 188 | Existing positions reduced: 207
33% less funds holding in top 10
Funds holding in top 10: 3 → 2 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Invesco
Atlanta,
Georgia
|
+$235M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
+$173M |
| 3 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
+$170M |
| 4 |
Bessemer Group
Woodbridge,
New Jersey
|
+$94.4M |
| 5 |
PC
PointState Capital
New York
|
+$70M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$200M |
| 2 |
AllianceBernstein
Nashville,
Tennessee
|
-$163M |
| 3 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
-$77.9M |
| 4 |
Allspring Global Investments
Charlotte,
North Carolina
|
-$45.5M |
| 5 |
Westfield Capital Management
Boston,
Massachusetts
|
-$34.7M |
RMBS Hedge Fund Activity: Q1 2026 in Review
557 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Rambus (RMBS) for Q1 2026, worth a combined $8.83B — down 3.8% from $9.18B a quarter earlier.
Buyers outnumbered sellers: 86 funds opened new RMBS positions and 75 closed out — a net gain of 11 holders — while 188 added to existing stakes and 207 trimmed.
The largest buyer was Invesco, adding an estimated $235M. The largest seller was T. Rowe Price Associates, cutting an estimated $200M.
- 557 institutional investors held Rambus (RMBS) as of Q1 2026, up from 553 in Q4 2025.
- Funds reported $8.83B of Rambus stock for Q1 2026, down 3.8% quarter-over-quarter.
- 86 funds opened new Rambus positions in Q1 2026 and 75 closed out, a net change of +11 holders.
- The largest Rambus buyer in Q1 2026 was Invesco, an estimated $235M added.
- The largest Rambus seller in Q1 2026 was T. Rowe Price Associates, an estimated $200M sold.
Based on aggregated 13F filings for Q1 2026.