Merck
MRK
3,309 hedge funds and large institutions have $160B invested in Merck in 2025 Q3 according to their latest regulatory filings, with 191 funds opening new positions, 1,355 increasing their positions, 1,424 reducing their positions, and 151 closing their positions.
26% more first-time investments, than exits
New positions opened: 191 | Existing positions closed: 151
13% more call options, than puts
Call options by funds: $2.83B | Put options by funds: $2.51B
10% more funds holding in top 10
Funds holding in top 10: 42 → 46 (+4)
1% more capital invested
Capital invested by funds: $158B → $160B (+$1.56B)
1% less funds holding
Funds holding: 3,327 → 3,309 (-18)
5% less repeat investments, than reductions
Existing positions increased: 1,355 | Existing positions reduced: 1,424
2.19% less ownership
Funds ownership: 78.42% → 76.23% (-2.2%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
+$298M |
| 2 |
JP Morgan Chase
New York
|
+$278M |
| 3 |
Invesco
Atlanta,
Georgia
|
+$232M |
| 4 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$231M |
| 5 |
Ameriprise
Minneapolis,
Minnesota
|
+$225M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Franklin Resources
San Mateo,
California
|
-$847M |
| 2 |
D.E. Shaw & Co
New York
|
-$568M |
| 3 |
UBS AM
Chicago,
Illinois
|
-$443M |
| 4 |
BlackRock
New York
|
-$285M |
| 5 |
Goldman Sachs
New York
|
-$278M |
MRK Hedge Fund Activity: Q3 2025 in Review
3,309 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Merck (MRK) for Q3 2025, worth a combined $160B — up 0.99% from $158B a quarter earlier.
Buyers outnumbered sellers: 191 funds opened new MRK positions and 151 closed out — a net gain of 40 holders — while 1,355 added to existing stakes and 1,424 trimmed.
The largest buyer was Assenagon Asset Management, adding an estimated $298M. The largest seller was Franklin Resources, cutting an estimated $847M.
- 3,309 institutional investors held Merck (MRK) as of Q3 2025, down from 3,327 in Q2 2025.
- Funds reported $160B of Merck stock for Q3 2025, up 0.99% quarter-over-quarter.
- 191 funds opened new Merck positions in Q3 2025 and 151 closed out, a net change of +40 holders.
- The largest Merck buyer in Q3 2025 was Assenagon Asset Management, an estimated $298M added.
- The largest Merck seller in Q3 2025 was Franklin Resources, an estimated $847M sold.
Based on aggregated 13F filings for Q3 2025.