Merit Medical Systems
MMSI
380 hedge funds and large institutions have $5.04B invested in Merit Medical Systems in 2025 Q3 according to their latest regulatory filings, with 51 funds opening new positions, 148 increasing their positions, 137 reducing their positions, and 45 closing their positions.
3,265% more call options, than puts
Call options by funds: $77.6M | Put options by funds: $2.3M
13% more first-time investments, than exits
New positions opened: 51 | Existing positions closed: 45
8% more repeat investments, than reductions
Existing positions increased: 148 | Existing positions reduced: 137
0% less funds holding
Funds holding: 381 → 380 (-1)
3.8% less ownership
Funds ownership: 105.98% → 102.18% (-3.8%)
30% less capital inflows, than outflows
Capital inflows: $442M | Capital outflows: $629M
67% less funds holding in top 10
Funds holding in top 10: 3 → 1 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Wellington Management Group
Boston,
Massachusetts
|
+$85.4M |
| 2 |
Thrivent Financial for Lutherans
Minneapolis,
Minnesota
|
+$46.7M |
| 3 |
Greenhouse Funds
Baltimore,
Maryland
|
+$24.7M |
| 4 |
Nomura Holdings
Tokyo,
Japan
|
+$23.5M |
| 5 |
Walleye Capital
New York
|
+$21.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$80.2M |
| 2 |
Invesco
Atlanta,
Georgia
|
-$75.6M |
| 3 |
Iron Triangle Partners
Cos Cob,
Connecticut
|
-$36.7M |
| 4 |
Polar Capital Holdings
London,
United Kingdom
|
-$35.8M |
| 5 |
Loomis, Sayles & Company
Boston,
Massachusetts
|
-$30.2M |
MMSI Hedge Fund Activity: Q3 2025 in Review
380 of the 7,653 institutional investors tracked by Wall St. Rank reported a position in Merit Medical Systems (MMSI) for Q3 2025, worth a combined $5.04B — down 14% from $5.86B a quarter earlier.
Buyers outnumbered sellers: 51 funds opened new MMSI positions and 45 closed out — a net gain of 6 holders — while 148 added to existing stakes and 137 trimmed.
The largest buyer was Wellington Management Group, adding an estimated $85.4M. The largest seller was Fidelity Investments, cutting an estimated $80.2M.
- 380 institutional investors held Merit Medical Systems (MMSI) as of Q3 2025, down from 381 in Q2 2025.
- Funds reported $5.04B of Merit Medical Systems stock for Q3 2025, down 14% quarter-over-quarter.
- 51 funds opened new Merit Medical Systems positions in Q3 2025 and 45 closed out, a net change of +6 holders.
- The largest Merit Medical Systems buyer in Q3 2025 was Wellington Management Group, an estimated $85.4M added.
- The largest Merit Medical Systems seller in Q3 2025 was Fidelity Investments, an estimated $80.2M sold.
Based on aggregated 13F filings for Q3 2025.