CHANG KUO WEI HERBERT, an insider at Monolithic Power Systems ($MPWR), made five open market sales of company shares over the last year, totaling $349 thousand. His most recent sale occurred on November 25, 2025. These transactions rank 7,245th among 11,678 individual insiders in our database, where the average sale amount hits 8.6 million across about 6.4 transactions. He recorded no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 3, 2026 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | A | Common Stock | 189 | $0.00 | 615.0000 | 48,042,000 | 44.37% | 0.00% |
| Nov. 25, 2025 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 100 | $896.97 | 426.0000 | 48,042,000 | 19.01% | 0.00% |
| Nov. 21, 2025 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 100 | $873.97 | 526.0000 | 48,042,000 | 15.97% | 0.00% |
| May 13, 2025 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 50 | $738.00 | 626.0000 | 48,835,000 | 7.40% | 0.00% |
| May 12, 2025 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 100 | $698.00 | 676.0000 | 48,835,000 | 12.89% | 0.00% |
| May 8, 2025 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 100 | $650.00 | 776.0000 | 48,835,000 | 11.42% | 0.00% |
| Feb. 4, 2025 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | A | Common Stock | 335 | $0.00 | 876.0000 | 48,835,000 | 61.92% | 0.00% |
| Aug. 15, 2024 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 100 | $888.88 | 641.0000 | 48,771,000 | 13.50% | 0.00% |
| Aug. 15, 2024 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 100 | $898.00 | 541.0000 | 48,771,000 | 15.60% | 0.00% |
| May 20, 2024 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 200 | $750.00 | 741.0000 | 48,771,000 | 21.25% | 0.00% |
| May 15, 2024 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 100 | $740.00 | 941.0000 | 48,771,000 | 9.61% | 0.00% |
| May 15, 2024 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 100 | $730.00 | 1,041.0000 | 48,771,000 | 8.76% | 0.00% |
| Feb. 29, 2024 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 250 | $706.34 | 1,141.0000 | 48,771,000 | 17.97% | 0.00% |
| Feb. 22, 2024 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | S | Common Stock | 250 | $750.00 | 1,391.0000 | 48,771,000 | 15.23% | 0.00% |
| Feb. 6, 2024 | MONOLITHIC POWER SYSTEMS INC | $MPWR | CHANG KUO WEI HERBERT | Not found | A | Common Stock | 348 | $0.00 | 1,641.0000 | 48,771,000 | 26.91% | 0.00% |