Merus
MRUS
MRUS was delisted on the 29th of December, 2025.
200 hedge funds and large institutions have $3.93B invested in Merus in 2025 Q2 according to their latest regulatory filings, with 47 funds opening new positions, 76 increasing their positions, 64 reducing their positions, and 30 closing their positions.
57% more first-time investments, than exits
New positions opened: 47 | Existing positions closed: 30
32% more capital invested
Capital invested by funds: $2.98B → $3.93B (+$952M)
31% more call options, than puts
Call options by funds: $41.5M | Put options by funds: $31.7M
24% more funds holding in top 10
Funds holding in top 10: 17 → 21 (+4)
19% more repeat investments, than reductions
Existing positions increased: 76 | Existing positions reduced: 64
8% more funds holding
Funds holding: 185 → 200 (+15)
5.54% more ownership
Funds ownership: 102.53% → 108.07% (+5.5%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$54.8M |
| 2 |
Ameriprise
Minneapolis,
Minnesota
|
+$48.5M |
| 3 |
PBA
Paradigm Biocapital Advisors
New York
|
+$42.9M |
| 4 |
Adage Capital Partners
Boston,
Massachusetts
|
+$39.2M |
| 5 |
Westfield Capital Management
Boston,
Massachusetts
|
+$25.4M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SC
Samlyn Capital
New York
|
-$75.9M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$46.6M |
| 3 |
CC
Commodore Capital
New York
|
-$44.6M |
| 4 |
BlackRock
New York
|
-$30.1M |
| 5 |
Millennium Management
New York
|
-$26.8M |
MRUS Hedge Fund Activity: Q2 2025 in Review
200 institutional investors reported a position in Merus (MRUS) for Q2 2025, worth a combined $3.93B — up 32% from $2.98B a quarter earlier.
Buyers outnumbered sellers: 47 funds opened new MRUS positions and 30 closed out — a net gain of 17 holders — while 76 added to existing stakes and 64 trimmed.
The largest buyer was T. Rowe Price Associates, adding an estimated $54.8M. The largest seller was Samlyn Capital, cutting an estimated $75.9M.
- 200 institutional investors held Merus (MRUS) as of Q2 2025, up from 185 in Q1 2025.
- Funds reported $3.93B of Merus stock for Q2 2025, up 32% quarter-over-quarter.
- 47 funds opened new Merus positions in Q2 2025 and 30 closed out, a net change of +17 holders.
- The largest Merus buyer in Q2 2025 was T. Rowe Price Associates, an estimated $54.8M added.
- The largest Merus seller in Q2 2025 was Samlyn Capital, an estimated $75.9M sold.
Based on aggregated 13F filings for Q2 2025.