Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
Common stock purchase or sale:
| Transaction Date | Reported DateTime | Company | Symbol | Insider Relationship | Shares Traded | Average Price | Total Amount | Shares Owned | Filing |
| 2025-11-26 Sale | 2025-11-28 10:19 am | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 20,000 | $926.47 | $18,529,316 | 167,331 (Direct) | View |
| 2025-11-25 Sale | 2025-11-28 10:15 am | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 20,000 | $904.18 | $18,083,638 | 187,331 (Direct) | View |
| 2025-10-24 Sale | 2025-10-24 5:22 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 1,300 | $1,088 | $1,413,906 | 126,354 (Direct) | View |
| 2025-10-15 Sale | 2025-10-17 12:11 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 16,840 | $1,018 | $17,139,295 | 127,654 (Direct) | View |
| 2025-09-18 Sale | 2025-09-23 2:35 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 14,510 | $914.45 | $13,268,670 | 144,494 (Direct) | View |
| 2025-02-10 Sale | 2025-02-12 3:45 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 663 | $717.1 | $475,438 | 158,977 (Direct) | View |
| 2024-11-08 Sale | 2024-11-13 5:15 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 866 | $765.14 | $662,611 | 159,640 (Direct) | View |
| 2024-08-08 Sale | 2024-08-12 2:40 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 859 | $778.39 | $668,637 | 160,506 (Direct) | View |
| 2024-07-22 Sale | 2024-07-24 4:43 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 3,205 | $831.58 | $2,665,214 | 161,365 (Direct) | View |
| 2024-07-02 Sale | 2024-07-02 6:27 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 1,858 | $824.65 | $1,532,200 | 164,570 (Direct) | View |
| 2024-07-01 Sale | 2024-07-02 11:26 am | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 37,093 | $808.2 | $29,978,650 | 166,428 (Direct) | View |
| 2024-05-08 Sale | 2024-05-09 12:53 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 869 | $690.02 | $599,627 | 203,521 (Direct) | View |
| 2024-02-08 Sale | 2024-02-09 2:35 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria Executive VP & General Counsel | 859 | $680 | $584,120 | 204,339 (Direct) | View |
| 2024-02-05 Sale | 2024-02-07 11:24 am | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria Executive VP & General Counsel | 982 | $641 | $629,462 | 205,198 (Direct) | View |
| 2024-01-09 Sale | 2024-01-10 11:34 am | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria Executive VP & General Counsel | 1,390 | $600 | $834,000 | 206,180 (Direct) | View |
| 2024-01-04 Sale | 2024-01-08 2:48 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria Executive VP & General Counsel | 25,314 | $583.14 | $14,761,606 | 207,570 (Direct) | View |
| 2023-12-13 Sale | 2023-12-14 2:03 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria Executive VP & General Counsel | 18,610 | $600 | $11,166,000 | 232,884 (Direct) | View |
| 2023-11-08 Sale | 2023-11-09 6:04 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 859 | $490.39 | $421,245 | 251,494 (Direct) | View |
| 2023-11-06 Sale | 2023-11-07 5:02 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 982 | $492.92 | $484,047 | 252,353 (Direct) | View |
| 2023-10-02 Sale | 2023-10-04 4:21 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 4,305 | $458.3 | $1,972,982 | 253,335 (Direct) | View |
| 2023-08-08 Sale | 2023-08-10 6:00 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 874 | $530.27 | $463,456 | 257,623 (Direct) | View |
| 2023-08-04 Sale | 2023-08-07 5:03 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 988 | $526.52 | $520,202 | 258,497 (Direct) | View |
| 2023-07-21 Sale | 2023-07-25 6:35 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 9,615 | $534.23 | $5,136,621 | 259,485 (Direct) | View |
| 2023-07-03 Sale | 2023-07-05 4:29 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 4,305 | $537.79 | $2,315,186 | 269,100 (Direct) | View |
| 2023-05-09 Sale | 2023-05-10 6:03 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 857 | $409.81 | $351,207 | 273,405 (Direct) | View |
| 2023-05-04 Sale | 2023-05-05 4:39 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 991 | $459.6 | $455,464 | 274,262 (Direct) | View |
| 2023-05-03 Sale | 2023-05-04 4:42 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 3,462 | $463.55 | $1,604,810 | 275,253 (Direct) | View |
| 2023-04-03 Sale | 2023-04-06 4:49 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 4,360 | $487.99 | $2,127,636 | 270,030 (Direct) | View |
| 2023-02-13 Sale | 2023-02-13 7:36 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 1,639 | $492.31 | $806,896 | 274,360 (Direct) | View |
| 2023-02-08 Sale | 2023-02-10 4:13 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 6,922 | $462.41 | $3,200,802 | 275,999 (Direct) | View |
| 2023-02-06 Sale | 2023-02-08 6:55 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 723 | $446.88 | $323,094 | 282,921 (Direct) | View |
| 2023-01-03 Sale | 2023-01-05 4:53 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 5,528 | $344.96 | $1,906,939 | 248,904 (Direct) | View |
| 2022-11-14 Sale | 2022-11-16 6:59 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 1,664 | $392.7 | $653,451 | 254,432 (Direct) | View |
| 2022-11-04 Sale | 2022-11-07 4:10 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 982 | $343.98 | $337,788 | 256,096 (Direct) | View |
| 2022-10-03 Sale | 2022-10-04 4:25 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 4,305 | $372.6 | $1,604,043 | 257,094 (Direct) | View |
| 2022-08-12 Sale | 2022-08-12 6:58 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 1,633 | $525.95 | $858,876 | 261,367 (Direct) | View |
| 2022-08-04 Sale | 2022-08-08 5:38 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 984 | $522.39 | $514,032 | 263,000 (Direct) | View |
| 2022-07-01 Sale | 2022-07-06 5:11 pm | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 4,515 | $361.58 | $1,632,534 | 263,984 (Direct) | View |
Stock options: Exercise, Award, Grant, Conversion
| Transaction Date | Reported DateTime | Exercisable Expiration | Company | Symnbol | Insider Relationship | Shares Traded | Conversion Price | Shares Owned | Filing |
| 2025-10-30 Tax Withholding | 2025-10-31 4:44 pm | N/A N/A | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 54,543 | $1,097 | 207,331 (Direct) | View |
| 2025-10-25 Option Award | 2025-10-28 9:38 pm | N/A N/A | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria EVP & General Counsel | 135,520 | $0 | 261,874 (Direct) | View |
| 2023-05-02 Option Award | 2023-05-04 4:42 pm | N/A N/A | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 8,685 | $0 | 275,253 (Direct) | View |
| 2023-02-07 Option Award | 2023-02-08 6:55 pm | N/A N/A | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 34,740 | $0 | 282,921 (Direct) | View |
| 2022-08-15 Other | 2022-10-04 4:25 pm | N/A N/A | MONOLITHIC POWER SYSTEMS INC | MPWR | Tseng Saria VP & General Counsel | 16 | $414.43 | 257,094 (Direct) | View |