Monolithic Power Systems
MPWR
860 hedge funds and large institutions have $27.1B invested in Monolithic Power Systems in 2025 Q1 according to their latest regulatory filings, with 121 funds opening new positions, 332 increasing their positions, 309 reducing their positions, and 110 closing their positions.
10% more first-time investments, than exits
New positions opened: 121 | Existing positions closed: 110
2.11% more ownership
Funds ownership: 95.41% → 97.52% (+2.1%)
7% more repeat investments, than reductions
Existing positions increased: 332 | Existing positions reduced: 309
0% less funds holding
Funds holding: 862 → 860 (-2)
2% less capital invested
Capital invested by funds: $27.6B → $27.1B (-$493M)
9% less call options, than puts
Call options by funds: $253M | Put options by funds: $277M
57% less funds holding in top 10
Funds holding in top 10: 7 → 3 (-4)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$319M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
+$240M |
| 3 |
VanEck Associates
New York
|
+$170M |
| 4 |
Coatue Management
New York
|
+$122M |
| 5 |
WorldQuant Millennium Advisors
New York
|
+$96.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
-$321M |
| 2 |
Norges Bank
Oslo,
Norway
|
-$151M |
| 3 |
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Toronto,
Ontario, Canada
|
-$89.1M |
| 4 |
Bank of Nova Scotia
Toronto,
Ontario, Canada
|
-$85.4M |
| 5 |
VNIM
Vaughan Nelson Investment Management
Houston,
Texas
|
-$82.3M |
MPWR Hedge Fund Activity: Q1 2025 in Review
860 of the 7,457 institutional investors tracked by Wall St. Rank reported a position in Monolithic Power Systems (MPWR) for Q1 2025, worth a combined $27.1B — down 1.8% from $27.6B a quarter earlier.
Buyers outnumbered sellers: 121 funds opened new MPWR positions and 110 closed out — a net gain of 11 holders — while 332 added to existing stakes and 309 trimmed.
The largest buyer was T. Rowe Price Associates, adding an estimated $319M. The largest seller was BlackRock, cutting an estimated $321M.
- 860 institutional investors held Monolithic Power Systems (MPWR) as of Q1 2025, down from 862 in Q4 2024.
- Funds reported $27.1B of Monolithic Power Systems stock for Q1 2025, down 1.8% quarter-over-quarter.
- 121 funds opened new Monolithic Power Systems positions in Q1 2025 and 110 closed out, a net change of +11 holders.
- The largest Monolithic Power Systems buyer in Q1 2025 was T. Rowe Price Associates, an estimated $319M added.
- The largest Monolithic Power Systems seller in Q1 2025 was BlackRock, an estimated $321M sold.
Based on aggregated 13F filings for Q1 2025.