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Insider trades
Open-market buys and sells by officers, directors and 10% owners, from SEC Form 4. Usually filed within two business days.
About this data
- What it is
- When a company's officers, directors or owners of more than 10% buy or sell its stock, they must report the trade to the SEC on Form 4. This feed shows purchases and sales on the open market; stock grants, option exercises and shares withheld for tax are left out.
- Who files it
- The insider, usually through the company, within two business days of the trade.
- How current
- We collect new filings throughout the day on SEC business days.
- Worth knowing
- Sales are often routine: insiders sell to diversify, to pay taxes, or under a 10b5-1 plan set up months in advance. A purchase with their own money is less common, which is why many investors pay closer attention to it.
All of this comes from public filings.
Source and freshness · Information, not investment advice (disclaimer).
Open-market trades per day, last 30 days
Purchases Sales
By trade date. Insiders have two business days to file, so the most recent days fill in later.
Latest open-market insider trades
Showing: ticker MPWR
| Traded | Insider | Company | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Nov 11, 2026 | Frank Anthony Balow III Chief Financial Officer | MPWR Monolithic Power Systems, Inc. | Sale | 20 | $1,434.31 | $28.7K Sale | Form 4 ↗ |
| Sep 28, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 130 | $1,356.94 | $176.4K Sale | Form 4 ↗ |
| Sep 28, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 10,967 | $1,351.43 | $14.8M Sale | Form 4 ↗ |
| Sep 28, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 6,343 | $1,347.15 | $8.5M Sale | Form 4 ↗ |
| Sep 28, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 5,783 | $1,343.76 | $7.8M Sale | Form 4 ↗ |
| Sep 28, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 2,949 | $1,338.66 | $3.9M Sale | Form 4 ↗ |
| Sep 28, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 1,111 | $1,333.34 | $1.5M Sale | Form 4 ↗ |
| Sep 28, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 2,121 | $1,328.54 | $2.8M Sale | Form 4 ↗ |
| Sep 28, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 596 | $1,323.31 | $788.7K Sale | Form 4 ↗ |
| Aug 24, 2026 | Robert W. Dean II Interim CFO | MPWR Monolithic Power Systems, Inc. | Sale | 32 | $1,297.72 | $41.5K Sale | Form 4 ↗ |
| Aug 24, 2026 | Kuo Wei Herbert Chang Director | MPWR Monolithic Power Systems, Inc. | Sale | 50 | $1,281.57 | $64.1K Sale | Form 4 ↗ |
| Aug 17, 2026 | Robert W. Dean II Interim CFO | MPWR Monolithic Power Systems, Inc. | Sale | 6 | $1,413.64 | $8,482 Sale | Form 4 ↗ |
| Aug 11, 2026 | Kuo Wei Herbert Chang Director | MPWR Monolithic Power Systems, Inc. | Sale | 50 | $1,420.00 | $71.0K Sale | Form 4 ↗ |
| Aug 5, 2026 | Robert W. Dean II Interim CFO | MPWR Monolithic Power Systems, Inc. | Sale | 105 | $1,344.27 | $141.1K Sale | Form 4 ↗ |
| Aug 3, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 30 | $1,343.94 | $40.3K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 110 | $1,405.71 | $154.6K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 117 | $1,400.45 | $163.9K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 213 | $1,396.16 | $297.4K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 50 | $1,388.19 | $69.4K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 410 | $1,384.11 | $567.5K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 418 | $1,378.73 | $576.3K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 472 | $1,375.47 | $649.2K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 240 | $1,369.18 | $328.6K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 50 | $1,359.36 | $68.0K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 5,640 | $1,352.95 | $7.6M Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 1,506 | $1,348.91 | $2.0M Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 1,864 | $1,344.16 | $2.5M Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 1,460 | $1,339.59 | $2.0M Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 776 | $1,334.59 | $1.0M Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 464 | $1,329.30 | $616.8K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 409 | $1,323.93 | $541.5K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 274 | $1,318.42 | $361.2K Sale | Form 4 ↗ |
| Jul 15, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 527 | $1,314.03 | $692.5K Sale | Form 4 ↗ |
| Jul 1, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 30 | $1,351.61 | $40.5K Sale | Form 4 ↗ |
| Jun 1, 2026 | Maurice Sciammas EVP, WW Sales & Marketing | MPWR Monolithic Power Systems, Inc. | Sale | 30 | $1,533.95 | $46.0K Sale | Form 4 ↗ |
| May 27, 2026 | Saria Tseng EVP & General Counsel | MPWR Monolithic Power Systems, Inc. | Sale | 7,565 | $1,700.00 | $12.9M Sale | Form 4 ↗ |
| May 26, 2026 | Robert W. Dean II Interim CFO | MPWR Monolithic Power Systems, Inc. | Sale | 22 | $1,649.56 | $36.3K Sale | Form 4 ↗ |
| May 26, 2026 | Jeff Zhou Director | MPWR Monolithic Power Systems, Inc. | Sale | 486 | $1,680.00 | $816.5K Sale | Form 4 ↗ |
| May 22, 2026 | Saria Tseng EVP & General Counsel | MPWR Monolithic Power Systems, Inc. | Sale | 5,000 | $1,586.43 | $7.9M Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 130 | $1,521.43 | $197.8K Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 352 | $1,518.15 | $534.4K Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 551 | $1,513.11 | $833.7K Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 3,769 | $1,507.70 | $5.7M Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 2,929 | $1,503.05 | $4.4M Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 608 | $1,499.46 | $911.7K Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 862 | $1,491.48 | $1.3M Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 6,688 | $1,486.76 | $9.9M Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 5,737 | $1,482.51 | $8.5M Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 4,082 | $1,476.96 | $6.0M Sale | Form 4 ↗ |
| May 18, 2026 | Michael Hsing CEO, Director | MPWR Monolithic Power Systems, Inc. | Sale | 5,049 | $1,472.84 | $7.4M Sale | Form 4 ↗ |
The newest 50 items, most recent first. Every row links to its original filing. Updated Nov 15, 2026, 5:16 PM EST.
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