Merus
MRUS
MRUS was delisted on the 29th of December, 2025.
10 hedge funds and large institutions have $5.73M invested in Merus in 2025 Q4 according to their latest regulatory filings, with 3 funds opening new positions, 3 increasing their positions, 0 reducing their positions, and 257 closing their positions.
29% more call options, than puts
Call options by funds: $1.37M | Put options by funds: $1.06M
93.93% less ownership
Funds ownership: 94.05% → 0.12% (-94%)
96% less funds holding
Funds holding: 268 → 10 (-258)
99% less first-time investments, than exits
New positions opened: 3 | Existing positions closed: 257
100% less capital invested
Capital invested by funds: $6.69B → $5.73M (-$6.69B)
100% less funds holding in top 10
Funds holding in top 10: 33 → 0 (-33)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
XT
XTX Topco
George Town,
Cayman Islands
|
+$1.42M |
| 2 |
BIG
Brooklyn Investment Group
Brooklyn,
New York
|
+$234K |
| 3 |
Simplex Trading
Chicago,
Illinois
|
+$79.9K |
| 4 |
FFA
Farther Finance Advisors
San Francisco,
California
|
+$46.3K |
| 5 |
EWA
EverSource Wealth Advisors
Birmingham,
Alabama
|
+$2K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PBA
Paradigm Biocapital Advisors
New York
|
-$412M |
| 2 |
ACA
Avoro Capital Advisors
New York
|
-$334M |
| 3 |
CC
Commodore Capital
New York
|
-$332M |
| 4 |
DM
Deerfield Management
New York
|
-$287M |
| 5 |
HI
HBK Investments
Dallas,
Texas
|
-$268M |
MRUS Hedge Fund Activity: Q4 2025 in Review
10 institutional investors reported a position in Merus (MRUS) for Q4 2025, worth a combined $5.73M — down 100% from $6.69B a quarter earlier.
Sellers outnumbered buyers: 257 funds closed out of MRUS and 3 opened new positions — a net loss of 254 holders — while 0 trimmed existing stakes and 3 added.
The largest buyer was XTX Topco, adding an estimated $1.42M. The largest seller was Paradigm Biocapital Advisors, exiting entirely with an estimated $412M sold.
- 10 institutional investors held Merus (MRUS) as of Q4 2025, down from 268 in Q3 2025.
- Funds reported $5.73M of Merus stock for Q4 2025, down 100% quarter-over-quarter.
- 3 funds opened new Merus positions in Q4 2025 and 257 closed out, a net change of -254 holders.
- The largest Merus buyer in Q4 2025 was XTX Topco, an estimated $1.42M added.
- The largest Merus seller in Q4 2025 was Paradigm Biocapital Advisors, an estimated $412M sold.
Based on aggregated 13F filings for Q4 2025.