Kuo Wei Herbert Chang insider trades: Monolithic Power Systems (MPWR) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Kuo reports to the SEC
Open-market buys and sales
101 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 24, 2026 | MPWR | ↓ Sell | 50 | $1281.57 | $64K | Direct | Aug 25, 2026 (1d) |
| Aug 11, 2026 | MPWR | ↓ Sell | 50 | $1420.00 | $71K | Direct | Aug 13, 2026 (2d) |
| Nov 25, 2025 | MPWR | ↓ Sell | 100 | $896.97 | $90K | Direct | Nov 25, 2025 (0d) |
| Nov 21, 2025 | MPWR | ↓ Sell | 100 | $873.97 | $87K | Direct | Nov 24, 2025 (3d) |
| May 13, 2025 | MPWR | ↓ Sell | 50 | $738.00 | $37K | Direct | May 13, 2025 (0d) |
| May 12, 2025 | MPWR | ↓ Sell | 100 | $698.00 | $70K | Direct | May 12, 2025 (0d) |
| May 8, 2025 | MPWR | ↓ Sell | 100 | $650.00 | $65K | Direct | May 9, 2025 (1d) |
| Aug 15, 2024 | MPWR | ↓ Sell | 200 | $893.44 | $179K | Direct | Aug 15, 2024 (0d) |
| May 20, 2024 | MPWR | ↓ Sell | 200 | $750.00 | $150K | Direct | May 22, 2024 (2d) |
| May 15, 2024 | MPWR | ↓ Sell | 200 | $735.00 | $147K | Direct | May 15, 2024 (0d) |
| Feb 29, 2024 | MPWR | ↓ Sell | 250 | $706.34 | $177K | Direct | Feb 29, 2024 (0d) |
| Feb 22, 2024 | MPWR | ↓ Sell | 250 | $750.00 | $188K | Direct | Feb 23, 2024 (1d) |
| Nov 14, 2023 | MPWR | ↓ Sell | 400 | $523.64 | $209K | Direct | Nov 15, 2023 (1d) |
| Nov 13, 2023 | MPWR | ↓ Sell | 100 | $510.00 | $51K | Direct | Nov 13, 2023 (0d) |
| Aug 29, 2023 | MPWR | ↓ Sell | 500 | $500.00 | $250K | Direct | Aug 29, 2023 (0d) |
| Feb 26, 2021 | MPWR | ↓ Sell | 300 | $370.00 | $111K | Direct | Feb 26, 2021 (0d) |
| Nov 4, 2020 | MPWR | ↓ Sell | 3,000 | $326.33 | $979K | Direct | Nov 5, 2020 (1d) |
| Aug 28, 2020 | MPWR | ↓ Sell | 1,300 | $268.00 | $348K | Direct | Sep 1, 2020 (4d) |
| Aug 12, 2020 | MPWR | ↓ Sell | 400 | $279.50 | $112K | Direct | Aug 14, 2020 (2d) |
| Aug 7, 2020 | MPWR | ↓ Sell | 700 | $280.43 | $196K | Direct | Aug 10, 2020 (3d) |
| Aug 5, 2020 | MPWR | ↓ Sell | 1,276 | $274.00 | $350K | Direct | Aug 5, 2020 (0d) |
| May 11, 2020 | MPWR | ↓ Sell | 3,026 | $210.64 | $637K | Direct | May 12, 2020 (1d) |
| May 5, 2020 | MPWR | ↓ Sell | 1,000 | $198.00 | $198K | Direct | May 7, 2020 (2d) |
| Feb 13, 2020 | MPWR | ↓ Sell | 1,000 | $192.00 | $192K | Direct | Feb 14, 2020 (1d) |
| Feb 11, 2020 | MPWR | ↓ Sell | 1,000 | $187.72 | $188K | Direct | Feb 12, 2020 (1d) |
| Feb 26, 2014 | MPWR | ↓ Sell | 7,254 | $36.06 | $262K | Direct | Feb 27, 2014 (1d) |
| Feb 24, 2014 | MPWR | ↓ Sell | 5,000 | $35.58 | $178K | Direct | Feb 25, 2014 (1d) |
| Nov 29, 2013 | MPWR | ↓ Sell | 10,643 | $33.43 | $356K | Direct | Nov 29, 2013 (0d) |
| Nov 13, 2013 | MPWR | ↓ Sell | 20,000 | $32.63 | $653K | Direct | Nov 13, 2013 (0d) |
| Nov 7, 2013 | MPWR | ↓ Sell | 4,000 | $32.00 | $128K | Direct | Nov 8, 2013 (1d) |
| Aug 28, 2013 | MPWR | ↓ Sell | 6,000 | $29.05 | $174K | Direct | Aug 28, 2013 (0d) |
| Aug 26, 2013 | MPWR | ↓ Sell | 4,000 | $29.02 | $116K | Direct | Aug 26, 2013 (0d) |
| Aug 15, 2013 | MPWR | ↓ Sell | 8,000 | $29.30 | $234K | Direct | Aug 19, 2013 (4d) |
| Aug 13, 2013 | MPWR | ↓ Sell | 7,500 | $29.27 | $219K | Direct | Aug 14, 2013 (1d) |
| May 31, 2013 | MPWR | ↓ Sell | 27,500 | $24.65 | $678K | Direct | May 31, 2013 (0d) |
| Feb 28, 2013 | MPWR | ↓ Sell | 10,299 | $24.82 | $256K | Direct | Mar 1, 2013 (1d) |
| Aug 29, 2012 | MPWR | ↓ Sell | 2,000 | $22.01 | $44K | Direct | Aug 30, 2012 (1d) |
| Aug 27, 2012 | MPWR | ↓ Sell | 9,500 | $22.81 | $217K | Direct | Aug 29, 2012 (2d) |
| Aug 24, 2012 | MPWR | ↓ Sell | 11,500 | $22.34 | $257K | Direct | Aug 24, 2012 (0d) |
| Aug 22, 2012 | MPWR | ↓ Sell | 15,000 | $22.10 | $331K | Direct | Aug 23, 2012 (1d) |
| Aug 16, 2012 | MPWR | ↓ Sell | 18,000 | $21.43 | $386K | Direct | Aug 17, 2012 (1d) |
| Aug 14, 2012 | MPWR | ↓ Sell | 2,000 | $12.20 | $24K | Direct | Aug 15, 2012 (1d) |
| Aug 10, 2012 | MPWR | ↓ Sell | 20,000 | $21.08 | $422K | Direct | Aug 10, 2012 (0d) |
| Feb 29, 2012 | MPWR | ↓ Sell | 15,000 | $18.99 | $285K | Direct | Feb 29, 2012 (0d) |
| Feb 24, 2012 | MPWR | ↓ Sell | 10,000 | $18.79 | $188K | By Investar Capital | Feb 27, 2012 (3d) |
| Feb 23, 2012 | MPWR | ↓ Sell | 20,177 | $18.04 | $364K | By Investar Capital | Feb 24, 2012 (1d) |
| Feb 17, 2012 | MPWR | ↓ Sell | 1,012 | $18.52 | $19K | By Investar Capital | Feb 17, 2012 (0d) |
| Aug 30, 2011 | MPWR | ↓ Sell | 10,000 | $12.54 | $125K | By VCFA GP | Aug 30, 2011 (0d) |
| Aug 29, 2011 | MPWR | ↓ Sell | 5,000 | $12.56 | $63K | By VCFA GP | Aug 29, 2011 (0d) |
| Aug 23, 2011 | MPWR | ↓ Sell | 5,000 | $12.17 | $61K | By VCFA GP | Aug 24, 2011 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MPWR insiders
Open-market trades in the last 12 months
About Kuo Wei Herbert Chang's insider trades
Kuo Wei Herbert Chang is an insider at Monolithic Power Systems (MPWR). Since Aug 26, 2005, Kuo has reported no open-market purchases and 101 sales worth $63.6M on SEC Form 4. In the last 12 months: 4 sales ($312K).
Their filings also include grants and awards (29 filings), option exercises (14 filings), other transactions (7 filings), gifts (2 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MPWR insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.