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MPWR Monolithic Power Systems

Information Technology, filed as MONOLITHIC PWR SYS INC (COM), Equity As of 2026 Q3 among managers we track Quote on Google Finance, opens in a new tab

Bought by 2 managers in 2026 Q2, sold by 1

  • 1 Owner
  • Max 0.7%
  • $5.6M
  • 1 add

In 2026 Q3 Torray Investment Partners added to Monolithic Power Systems.

Who owns this now

Largest portfolio weights among holders, up to 0.7% (Torray Investment Partners). Not free-float ownership.

  1. Torray Investment Partners Add 0.74%

Who owns MPWR

Sorted by value, long equity only, as of 2026 Q3.

History
Torray Investment Partners 0.74%, was 0.69% Add +12.2% 4,169 $5.6M History

1 current, options excluded

Weight bar: held both quarters added sold at this quarter’s reported price

Insider trades

Open-market buys and sales by MPWR's executives, directors and 10% owners in the last 12 months, from their Form 4s

All MPWR insider trades
  • None no insider bought on the open market
  • $299M sold by 9 insiders outside a trading plan
  • $258M sold by 5 insiders under 10b5-1 plans
  1. Michael Hsing CEO
    Planned sale
    $40.3M 30,000 shares at $1,344.97 3.5% of stake
    Traded Sep 28 Filed Sep 30
    ↗
  2. Kuo Wei Herbert Chang Director
    Sale
    $64K 50 shares at $1,281.57 8.8% of stake
    Traded Aug 24 Filed Aug 25
    ↗
  3. Kuo Wei Herbert Chang Director
    Sale
    $71K 50 shares at $1,420.00 8.1% of stake
    Traded Aug 11 Filed Aug 13
    ↗
  4. Robert W Dean II CFO
    Sale
    $141K 105 shares at $1,344.27 1.5% of stake
    Traded Aug 5 Filed Aug 6
    ↗
  5. Maurice Sciammas EVP, WW Sales & Marketing
    Planned sale
    $40K 30 shares at $1,343.94 2.6% of stake
    Traded Aug 3 Filed Aug 5
    ↗
  6. Maurice Sciammas EVP, WW Sales & Marketing
    Planned sale
    $20.2M 15,000 shares at $1,349.73 9% of stake
    Traded Jul 15 Filed Jul 17
    ↗
  7. Maurice Sciammas EVP, WW Sales & Marketing
    Planned sale
    $41K 30 shares at $1,351.61 2.5% of stake
    Traded Jul 1 Filed Jul 6
    ↗
  8. Maurice Sciammas EVP, WW Sales & Marketing
    Planned sale
    $46K 30 shares at $1,533.95 2.5% of stake
    Traded Jun 1 Filed Jun 3
    ↗
  9. Saria Tseng EVP & General Counsel
    Sale
    $12.9M 7,565 shares at $1,700.00 5% of stake
    Traded May 27 Filed May 29
    ↗
  10. Jeff Zhou Director
    Sale
    $816K 486 shares at $1,680.00 11% of stake
    Traded May 26 Filed May 27
    ↗
  11. Saria Tseng EVP & General Counsel
    Sale
    $7.9M 5,000 shares at $1,586.43 3.2% of stake
    Traded May 22 Filed May 27
    ↗
  12. Michael Hsing CEO
    Sale
    $59.3M 40,000 shares at $1,482.75 4.5% of stake
    Traded May 18 Filed May 20
    ↗
  13. Maurice Sciammas EVP, WW Sales & Marketing
    Planned sale
    $18.7M 12,000 shares at $1,561.40 6.7% of stake
    Traded May 15 Filed May 19
    ↗
  14. Eugen J Elmiger Director
    Sale
    $19M 12,000 shares at $1,584.96 69% of stake
    Traded May 6 Filed May 8
    ↗
  15. Deming Xiao EVP, Global Operations
    Sale
    $49.6M 30,000 shares at $1,654.55 13% of stake
    Traded May 6 Filed May 8
    ↗

Also filed in the last 12 months, not counted as buying or selling: 13 gifts, 12 stock grants, 9 sales to cover taxes, 5 share withholdings for taxes, and 2 other transactions.

Congress

5 members of Congress traded MPWR in the last three years: 5 buys and 4 sales. 3 members listed it in 2025 annual reports.

All Congress trades
  1. Byron Donalds R-FL-19 Partial sale $1K–$15K Jun 5 filed Jul 15
  2. Byron Donalds R-FL-19Spouse Partial sale $1K–$15K Jun 5 filed Jul 15
  3. Markwayne Mullin R-OKJoint Buy $15K–$50K Feb 4 filed Mar 2
  4. Markwayne Mullin R-OK Buy $15K–$50K Jan 5 filed Feb 4
  5. Markwayne Mullin R-OKSpouse Buy $15K–$50K Jan 5 filed Feb 4
  6. Michael Guest R-MS-3Child Buy $1K–$15K Oct 20, 2025 filed Nov 19, 2025

SEC filings

Recent issuer filings from EDGAR, 11 shown.

Filed Form Detail Links
8-K 2.02,5.02,9.01 Filing Doc
8-K 8.01,9.01 Filing Doc
10-Q Filing Doc
8-K 2.02,9.01 Filing Doc
SCHEDULE 13G — Filing Doc
SCHEDULE 13G/A — Filing Doc
8-K 5.07,8.01,9.01 Filing Doc
10-Q FORM 10-Q Filing Doc
DEF 14A FORM DEF 14A Filing Doc
DEFA14A FORM DEFA14A Filing Doc
8-K 2.02,9.01 Filing Doc

Source: SEC EDGAR submissions, updated about 16 hours ago. All on EDGAR

Financials

US-GAAP annual figures by fiscal year, as tagged in Form 10-K. Each value links to its SEC filing.

Income statement

Metric FY2023 FY2024 FY2025
Revenue $1.82B $2.21B $2.79B
Gross profit $1.02B $1.22B $1.54B
Gross margin * 56.1% 55.3% 55.2%
Net income $0.427B $1.79B $0.621B
Net margin * 23.5% 81.0% 22.3%

Balance sheet

Metric FY2023 FY2024 FY2025
Total current assets $1.82B $1.57B $1.79B
Total non-current assets * $0.615B $2.05B $1.92B
Total assets $2.43B $3.62B $3.71B
Total current liabilities $235.04M $294.57M $363.4M
Total non-current liabilities * $149.38M $176.76M $268.11M
Total equity $2.05B $3.15B $3.07B

Cash flow

Metric FY2023 FY2024 FY2025
Cash from operations $638.21M $788.41M $838.2M
Cash from investing -$178.73M $223.05M -$157.27M
Cash from financing -$183.72M -$872.23M -$285.86M
Net change in cash $272.45M $130.76M $407.58M

Source: SEC companyfacts (US-GAAP 10-K). A * marks a computed figure, not a single XBRL tag. Fiscal years are as the issuer labels them. Follow The Filings does not adjust or audit these figures.

Ownership over time

13Fs that reported it each quarter. Click a bar for that quarter’s holders.