Monolithic Power Systems Ownership | Who Owns Monolithic Power Systems?
Monolithic Power Systems Ownership Summary
Monolithic Power Systems is owned by 97.40% institutional investors, 3.59% insiders. Vanguard group is the largest institutional shareholder, holding 12.60% of MPWR shares. Fidelity Select Semiconductors is the top mutual fund, with 3.34% of its assets in Monolithic Power Systems shares.
MPWR Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Monolithic Power Systems | 97.40% | 3.59% | -1.00% |
| Sector | Technology Stocks | 78.08% | 15.01% | 6.91% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Vanguard group | 6.03M | 12.60% | $5.47B |
| Blackrock funding, inc. /de | 5.59M | 11.39% | $7.73B |
| Fmr | 5.18M | 10.54% | $7.16B |
| Vanguard capital management | 3.13M | 6.37% | $4.32B |
| Invesco | 2.34M | 4.77% | $3.24B |
| State street | 2.28M | 4.65% | $3.16B |
| Geode capital management | 1.20M | 2.43% | $1.65B |
| Price t rowe associates inc /md/ | 976.80K | 1.99% | $1.35B |
| Franklin resources | 811.97K | 1.65% | $1.12B |
| Goldman sachs group | 780.65K | 1.59% | $1.08B |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Pembroke management | 29.45K | 4.91% | $39.68M |
| Arcadia investment management corp/mi | 19.90K | 3.73% | $21.76M |
| Avalon global asset management | 22.00K | 3.32% | $30.41M |
| Left brain wealth management | 7.49K | 3.12% | $10.36M |
| Arosa capital management lp | 12.00K | 2.96% | $16.59M |
| Natixis investment managers | 63.77K | 2.92% | $37.73M |
| Carderock capital management | 9.05K | 2.80% | $12.20M |
| Zevenbergen capital investments | 74.74K | 2.30% | $100.69M |
| Timessquare capital management | 110.82K | 2.25% | $153.20M |
| Capital impact advisors | 27.77K | 2.15% | $38.39M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Invesco | 2.34M | 0.26% | 1.31M |
| Fmr | 5.18M | 0.31% | 776.43K |
| Norges bank | 751.40K | 0.10% | 751.40K |
| Sixth street partners management company | 388.95K | 0.07% | 388.95K |
| Van eck associates | 746.24K | 0.63% | 221.67K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| T. rowe price investment management | - | - | -721.62K |
| Blackrock funding, inc. /de | 5.59M | 0.11% | -482.54K |
| Price t rowe associates inc /md/ | 976.80K | 0.14% | -286.16K |
| Capital research global investors | - | - | -256.87K |
| Geode capital management | 1.20M | 0.09% | -236.78K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 751.40K | 0.10% | 751.40K | $1.04B |
| Sixth street partners management company | 388.95K | 0.07% | 388.95K | $537.67M |
| Axa investment managers | 115.62K | 0.29% | 115.62K | $106.44M |
| D1 capital partners | 85.10K | 0.34% | 85.10K | $117.64M |
| Hrt financial lp | 77.35K | 0.20% | 77.35K | $106.92M |
Sold Out
| Holder | Change |
|---|---|
| Palisade asset management | -1.00 |
| Legacy bridge | -1.00 |
| Highmark wealth management | -1.00 |
| Activest wealth management | -1.00 |
| Horizon financial services | -1.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 | 1,271 | 9.47% | 47,822,262 | 4.43% | 97 | 1.12% | 627 | 10.78% | 461 | 11.08% |
| Mar 31, 2026 | 838 | -23.12% | 25,567,911 | -46.44% | 52 | 0.53% | 418 | -27.43% | 284 | -18.39% |
| Dec 31, 2025 | 808 | -20.00% | 31,167,891 | -55.15% | 65 | 0.31% | 411 | -21.56% | 270 | -13.46% |
| Sep 30, 2025 | 964 | 4.22% | 69,120,352 | 51.13% | 144 | 1.58% | 503 | -0.98% | 294 | -1.67% |
| Jun 30, 2025 | 928 | 5.10% | 47,163,715 | 2.50% | 98 | 1.07% | 505 | 10.75% | 302 | 0.33% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Fidelity Select Semiconductors | 1.64M | 3.34% | -201.10K |
| Vanguard US Total Market Shares ETF | 1.47M | 3.07% | 6.66K |
| Vanguard MStar Total Stk Mkt Idx Invest | 1.48M | 3.02% | -3.01K |
| Vanguard Morn Total Stk Mkt Idx Investor | 1.48M | 3.02% | 9.18K |
| Vanguard Total Stock Mkt Idx Inv | 1.48M | 3.02% | 9.18K |
| Vanguard Institutional 500 Index Trust | 1.36M | 2.84% | 9.51K |
| Vanguard 500 Index Investor | 1.29M | 2.63% | -14.62K |
| iShares Semiconductor ETF | 1.12M | 2.28% | -11.30K |
| Invesco QQQ Trust | 1.03M | 2.09% | -1.67K |
| Vanguard Morn Mid Cap Index Instl | 1.01M | 2.06% | 7.39K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Sep 28, 2026 | Hsing Michael | CEO | Sell | $3.95M |
| Sep 28, 2026 | Hsing Michael | CEO | Sell | $2.82M |
| Sep 28, 2026 | Hsing Michael | CEO | Sell | $1.48M |
| Sep 28, 2026 | Hsing Michael | CEO | Sell | $788.69K |
| Sep 28, 2026 | Hsing Michael | CEO | Sell | $7.77M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q3 | - | 33 |
| 2026 Q2 | - | 70 |
| 2026 Q1 | - | 80 |
| 2025 Q4 | - | 147 |
| 2025 Q3 | - | 39 |
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