Monolithic Power Systems
MPWR
982 hedge funds and large institutions have $43B invested in Monolithic Power Systems in 2025 Q3 according to their latest regulatory filings, with 165 funds opening new positions, 360 increasing their positions, 317 reducing their positions, and 75 closing their positions.
120% more first-time investments, than exits
New positions opened: 165 | Existing positions closed: 75
67% more funds holding in top 10
Funds holding in top 10: 6 → 10 (+4)
14% more repeat investments, than reductions
Existing positions increased: 360 | Existing positions reduced: 317
8% more funds holding
Funds holding: 906 → 982 (+76)
8% less call options, than puts
Call options by funds: $388M | Put options by funds: $421M
1.1% less ownership
Funds ownership: 98.89% → 97.8% (-1.1%)
10% less capital inflows, than outflows
Capital inflows: $2.71B | Capital outflows: $3.01B
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$403M |
| 2 |
Citadel Advisors
Miami,
Florida
|
+$205M |
| 3 |
First Trust Advisors
Wheaton,
Illinois
|
+$145M |
| 4 |
Fidelity Investments
Boston,
Massachusetts
|
+$140M |
| 5 |
Millennium Management
New York
|
+$126M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$418M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$203M |
| 3 |
VanEck Associates
New York
|
-$178M |
| 4 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$144M |
| 5 |
Rafferty Asset Management
New York
|
-$121M |
MPWR Hedge Fund Activity: Q3 2025 in Review
982 of the 7,650 institutional investors tracked by Wall St. Rank reported a position in Monolithic Power Systems (MPWR) for Q3 2025, worth a combined $43B — up 24% from $34.6B a quarter earlier.
Buyers outnumbered sellers: 165 funds opened new MPWR positions and 75 closed out — a net gain of 90 holders — while 360 added to existing stakes and 317 trimmed.
The largest buyer was BlackRock, adding an estimated $403M. The largest seller was T. Rowe Price Associates, cutting an estimated $418M.
- 982 institutional investors held Monolithic Power Systems (MPWR) as of Q3 2025, up from 906 in Q2 2025.
- Funds reported $43B of Monolithic Power Systems stock for Q3 2025, up 24% quarter-over-quarter.
- 165 funds opened new Monolithic Power Systems positions in Q3 2025 and 75 closed out, a net change of +90 holders.
- The largest Monolithic Power Systems buyer in Q3 2025 was BlackRock, an estimated $403M added.
- The largest Monolithic Power Systems seller in Q3 2025 was T. Rowe Price Associates, an estimated $418M sold.
Based on aggregated 13F filings for Q3 2025.