Monolithic Power Systems
MPWR
1,246 hedge funds and large institutions have $65.6B invested in Monolithic Power Systems in 2026 Q2 according to their latest regulatory filings, with 218 funds opening new positions, 419 increasing their positions, 464 reducing their positions, and 78 closing their positions.
179% more first-time investments, than exits
New positions opened: 218 | Existing positions closed: 78
27% more capital invested
Capital invested by funds: $51.6B → $65.6B (+$14B)
11% more funds holding
Funds holding: 1,122 → 1,246 (+124)
0.67% more ownership
Funds ownership: 96.23% → 96.89% (+0.67%)
10% less repeat investments, than reductions
Existing positions increased: 419 | Existing positions reduced: 464
23% less call options, than puts
Call options by funds: $670M | Put options by funds: $868M
23% less funds holding in top 10
Funds holding in top 10: 13 → 10 (-3)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$1.17B |
| 2 |
VanEck Associates
New York
|
+$333M |
| 3 |
Goldman Sachs
New York
|
+$319M |
| 4 |
Two Sigma Investments
New York
|
+$268M |
| 5 |
Jane Street
New York
|
+$262M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$789M |
| 2 |
BlackRock
New York
|
-$724M |
| 3 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$430M |
| 4 |
Geode Capital Management
Boston,
Massachusetts
|
-$356M |
| 5 |
Brown Advisory
Baltimore,
Maryland
|
-$299M |
MPWR Hedge Fund Activity: Q2 2026 in Review
1,246 of the 8,348 institutional investors tracked by Wall St. Rank reported a position in Monolithic Power Systems (MPWR) for Q2 2026, worth a combined $65.6B — up 27% from $51.6B a quarter earlier.
Buyers outnumbered sellers: 218 funds opened new MPWR positions and 78 closed out — a net gain of 140 holders — while 419 added to existing stakes and 464 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $1.17B. The largest seller was T. Rowe Price Investment Management, exiting entirely with an estimated $789M sold.
- 1,246 institutional investors held Monolithic Power Systems (MPWR) as of Q2 2026, up from 1,122 in Q1 2026.
- Funds reported $65.6B of Monolithic Power Systems stock for Q2 2026, up 27% quarter-over-quarter.
- 218 funds opened new Monolithic Power Systems positions in Q2 2026 and 78 closed out, a net change of +140 holders.
- The largest Monolithic Power Systems buyer in Q2 2026 was Fidelity Investments, an estimated $1.17B added.
- The largest Monolithic Power Systems seller in Q2 2026 was T. Rowe Price Investment Management, an estimated $789M sold.
Based on aggregated 13F filings for Q2 2026.