Monolithic Power Systems, Inc.
MPWR- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0001280452
In the last 90 days, Monolithic Power Systems, Inc. insiders filed 0 open-market purchases and 5 sales; 1,258 institutions reported holding it in 13F filings for Q2 2026, worth $65.6B in total; superinvestors D1 Capital Partners and Maverick Capital hold it.
Key figures
- Market capClose on Nov 9, 2026
- $67.7B
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $40.5M in total
- 5
- 13F holdersQ2 2026, +143 vs. previous quarter
- 1,258
- 13F valueReported value at the end of Q2 2026
- $65.6B
- Superinvestors holdingAt the end of Q2 2026
- 2
Price chart
Financials
See financial statementsFrom SEC filings, in USD.
- Revenue, FY2025
- $2.79B
- +26.4% year over year
- Net income, FY2025
- $621.5M
- −65.2% year over year
- Free cash flow, FY2025
- $666.2M
- +3.7% year over year
- Revenue, Q3 FY2026
- $1.20B
- +63.1% year over year
Revenue flow, FY2025
Green is profit; orange is costs, expenses and taxes. Percentages are shares of revenue.
Short interest
See short dataFrom FINRA, settlement date Oct 15, 2026.
- Short interest
- 1.60M
- Shares sold short
- Change
- −256.0K
- −13.8% vs. previous
- Days to cover
- 2.33
- At average daily volume
Superinvestors holding MPWR, Q2 2026
Go to the superinvestors tab2 superinvestors report holding Monolithic Power Systems, Inc. on Form 13F. Percentages are the stock's share of each portfolio.
D1 Capital Partners
Dan Sundheim
0.3%
Monolithic Power Systems, Inc.'s share of the portfolio
- Shares
- 85,103
- Value
- $117.6M
Maverick Capital
Lee Ainslie
<0.1%
Monolithic Power Systems, Inc.'s share of the portfolio
- Shares
- 593
- Value
- $819.7K
Latest insider trades
See all insider tradesOpen-market purchases and sales by Monolithic Power Systems, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 30, 2026 (view filing)5:21 PM ET | Sep 28 | 2 days | Hsing MichaelCEO | SSale | −30.0K | $1,344.97 | −$40.3M | −3.5%818.3K after | 8 lots10b5-1 |
| Aug 26, 2026 (view filing)7:22 PM ET | Aug 24 | 2 days | Dean Robert W IIInterim CFO | SSale | −32 | $1,297.72 | −$41.5K | −0.4%7.09K after | |
| Aug 25, 2026 (view filing)7:13 PM ET | Aug 24 | 1 day | Chang Kuo Wei HerbertDirector | SSale | −50 | $1,281.57 | −$64.1K | −8.8%515 after | |
| Aug 19, 2026 (view filing)8:44 PM ET | Aug 17 | 2 days | Dean Robert W IIInterim CFO | SSale | −6 | $1,413.64 | −$8.48K | −0.1%7.13K after | |
| Aug 13, 2026 (view filing)5:23 PM ET | Aug 11 | 2 days | Chang Kuo Wei HerbertDirector | SSale | −50 | $1,420.00 | −$71.0K | −8.1%565 after | |
| Aug 6, 2026 (view filing)6:20 PM ET | Aug 5 | 1 day | Dean Robert W IIInterim CFO | SSale | −105 | $1,344.27 | −$141.1K | −1.5%7.13K after | |
| Aug 5, 2026 (view filing)5:33 PM ET | Aug 3 | 2 days | Sciammas MauriceEVP, WW Sales & Marketing | SSale | −30 | $1,343.94 | −$40.3K | −2.6%1.12K after | 10b5-1 |
| Jul 17, 2026 (view filing)5:43 PM ET | Jul 15 | 2 days | Sciammas MauriceEVP, WW Sales & Marketing | SSale | −15.0K | $1,349.73 | −$20.2M | −9.0%151.6K after | 18 lots10b5-1 |
| Jul 6, 2026 (view filing)5:51 PM ET | Jul 1 | 5 days | Sciammas MauriceEVP, WW Sales & Marketing | SSale | −30 | $1,351.61 | −$40.5K | −2.5%1.15K after | 10b5-1 |
| Jun 3, 2026 (view filing) | Jun 1 | 2 days | Sciammas MauriceEVP, WW Sales & Marketing | SSale | −30 | $1,533.95 | −$46.0K | −2.5%1.18K after | 10b5-1 |
Top 10 13F holders, Q2 2026
See all 1,258 holdersThe largest institutional positions in Monolithic Power Systems, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 5,589,925 | $7.73B | 0.12% | −482,542−7.9% | Reduced |
| FMR LLC | 5,177,258 | $7.16B | 0.31% | +776,427+17.6% | Added |
| Vanguard Capital Management LLC | 3,126,756 | $4.32B | 0.09% | +43,307+1.4% | Added |
| Vanguard Portfolio Management LLC | 2,504,858 | $3.46B | 0.16% | −11,634−0.5% | Reduced |
| Invesco Ltd. | 2,343,930 | $3.24B | 0.26% | −172,057−6.8% | Reduced |
| State Street Corp | 2,282,186 | $3.16B | 0.09% | +93,732+4.3% | Added |
| Geode Capital Management, LLC | 1,195,281 | $1.65B | 0.09% | −236,785−16.5% | Reduced |
| Price T Rowe Associates Inc | 976,798 | $1.35B | 0.14% | −286,156−22.7% | Reduced |
| Franklin Resources Inc | 811,974 | $1.12B | 0.24% | −116,697−12.6% | Reduced |
| Goldman Sachs Group Inc | 780,650 | $1.08B | 0.11% | +212,586+37.4% | Added |
Holders of 5% or more of MPWR
See all 5 holders and filingsHolders whose latest Schedule 13D or 13G filing reports 5% or more of Monolithic Power Systems, Inc..
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 10.20%4.90M shares | +0.40 ppfrom 9.80% | Apr 17, 20252 filings | Jan 8, 2026 | SEC |
| FMR LLC | 13G/A | 9.10%4.45M shares | −1.40 ppfrom 10.50% | Feb 9, 20245 filings | Nov 5, 2026 | SEC |
| Vanguard Capital Management LLC | 13G | 7.25%3.56M shares | New | Apr 30, 20261 filing | Apr 30, 2026 | SEC |
| Invesco Ltd. | 13G | 5.20%2.51M shares | New | Jul 15, 20261 filing | Jul 15, 2026 | SEC |
| Vanguard Portfolio Management LLC | 13G | 5.14%2.53M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
Politician trades
All politician trades in MPWR6 members of Congress reported 14 trades in Monolithic Power Systems, Inc. since 2020. Newest filings:
| Filed | Politician | Type | Amount |
|---|---|---|---|
| Aug 5, 2026 |  Tommy Tuberville Senate · AL | Sell (full) | $1K-$15K |
| Jul 15, 2026 |  Byron Donalds House · FL | Sell (partial) | $1K-$15K |
| Jul 15, 2026 | Byron Donalds House · FL | Sell (partial) | $1K-$15K |
| Mar 2, 2026 |  Markwayne Mullin Senate · OK | Buy | $15K-$50K |
| Feb 4, 2026 | Markwayne Mullin Senate · OK | Buy | $15K-$50K |
Senate · AL · Aug 5, 2026
Sell (full)$1K-$15K
House · FL · Jul 15, 2026
Sell (partial)$1K-$15K
House · FL · Jul 15, 2026
Sell (partial)$1K-$15K
Senate · OK · Mar 2, 2026
Buy$15K-$50K
Senate · OK · Feb 4, 2026
Buy$15K-$50K