Merus
MRUS
MRUS was delisted on the 29th of December, 2025.
104 hedge funds and large institutions have $672M invested in Merus in 2023 Q1 according to their latest regulatory filings, with 18 funds opening new positions, 37 increasing their positions, 25 reducing their positions, and 5 closing their positions.
1,319% more call options, than puts
Call options by funds: $4.57M | Put options by funds: $322K
260% more first-time investments, than exits
New positions opened: 18 | Existing positions closed: 5
100% more funds holding in top 10
Funds holding in top 10: 4 → 8 (+4)
48% more repeat investments, than reductions
Existing positions increased: 37 | Existing positions reduced: 25
19% more capital invested
Capital invested by funds: $565M → $672M (+$107M)
13% more funds holding
Funds holding: 92 → 104 (+12)
0% more ownership
Funds ownership: 78.85% → 78.85% (+0%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SC
Samlyn Capital
New York
|
+$13.7M |
| 2 |
SCM
Silverarc Capital Management
Boston,
Massachusetts
|
+$6.87M |
| 3 |
FFM
Fairmount Funds Management
West Conshohocken,
Pennsylvania
|
+$6.52M |
| 4 |
ABG
Ally Bridge Group
New York
|
+$4.81M |
| 5 |
CC
Commodore Capital
New York
|
+$3.79M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Federated Hermes
Pittsburgh,
Pennsylvania
|
-$22.4M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$9.64M |
| 3 |
B
Braidwell
Stamford,
Connecticut
|
-$9.15M |
| 4 |
Millennium Management
New York
|
-$5.64M |
| 5 |
ACM
Aquilo Capital Management
San Francisco,
California
|
-$3.61M |
MRUS Hedge Fund Activity: Q1 2023 in Review
104 of the 6,286 institutional investors tracked by Wall St. Rank reported a position in Merus (MRUS) for Q1 2023, worth a combined $672M — up 19% from $565M a quarter earlier.
Buyers outnumbered sellers: 18 funds opened new MRUS positions and 5 closed out — a net gain of 13 holders — while 37 added to existing stakes and 25 trimmed.
The largest buyer was Samlyn Capital, adding an estimated $13.7M. The largest seller was Federated Hermes, cutting an estimated $22.4M.
- 104 institutional investors held Merus (MRUS) as of Q1 2023, up from 92 in Q4 2022.
- Funds reported $672M of Merus stock for Q1 2023, up 19% quarter-over-quarter.
- 18 funds opened new Merus positions in Q1 2023 and 5 closed out, a net change of +13 holders.
- The largest Merus buyer in Q1 2023 was Samlyn Capital, an estimated $13.7M added.
- The largest Merus seller in Q1 2023 was Federated Hermes, an estimated $22.4M sold.
Based on aggregated 13F filings for Q1 2023.