Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Monolithic Power Systems Inc (MPWR) since 2015 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Monolithic Power Systems Inc. Table 2 shows the detailed insider transactions. This company's CIK number is 1280452.
Total stock buying since 2015: $0.
Total stock sales since 2015: $1,541,312,123.
Total stock option exercises since 2015: $6,394,532.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2025 | 0 | $0 | 122,186 | $92,988,547 | 0 | $0 |
| 2024 | 0 | $0 | 419,818 | $288,389,396 | 0 | $0 |
| 2023 | 0 | $0 | 321,405 | $161,588,961 | 0 | $0 |
| 2022 | 0 | $0 | 287,103 | $120,189,634 | 0 | $0 |
| 2021 | 0 | $0 | 671,463 | $261,651,283 | 213,100 | $0 |
| 2020 | 0 | $0 | 1,099,287 | $230,797,454 | 120,000 | $0 |
| 2019 | 0 | $0 | 987,406 | $140,497,489 | 291,797 | $0 |
| 2018 | 0 | $0 | 769,686 | $94,381,540 | 135,145 | $0 |
| 2017 | 0 | $0 | 658,153 | $63,373,609 | 23,567 | $0 |
| 2016 | 0 | $0 | 694,815 | $45,309,554 | 96,877 | $522,549 |
| 2015 | 0 | $0 | 798,236 | $42,144,656 | 1,207,840 | $5,871,983 |
| Trading Period | Insider Buying | Insider Sales | Option Exercises | |||
|---|---|---|---|---|---|---|
| year-month | Shares | Value | Shares | Value | Shares | Value |
| 2025-09 | 0 | $0 | 3,000 | $2,440,851 | 0 | $0 |
| 2025-08 | 0 | $0 | 68,023 | $54,315,975 | 0 | $0 |
| 2025-07 | 0 | $0 | 6,000 | $4,500,000 | 0 | $0 |
| 2025-05 | 0 | $0 | 12,250 | $8,583,700 | 0 | $0 |
| 2025-02 | 0 | $0 | 29,277 | $20,602,821 | 0 | $0 |
| 2025-01 | 0 | $0 | 3,636 | $2,545,200 | 0 | $0 |
| 2024-12 | 0 | $0 | 2,500 | $1,500,000 | 0 | $0 |
| 2024-11 | 0 | $0 | 8,644 | $6,630,499 | 0 | $0 |
| 2024-10 | 0 | $0 | 13,500 | $12,495,631 | 0 | $0 |
| 2024-09 | 0 | $0 | 2,500 | $2,261,222 | 0 | $0 |
| 2024-08 | 0 | $0 | 32,317 | $28,876,294 | 0 | $0 |
| 2024-07 | 0 | $0 | 76,931 | $62,951,170 | 0 | $0 |
| 2024-06 | 0 | $0 | 11,500 | $8,488,996 | 0 | $0 |
| 2024-05 | 0 | $0 | 18,568 | $12,654,455 | 0 | $0 |
| 2024-04 | 0 | $0 | 19,000 | $12,921,775 | 0 | $0 |
| 2024-03 | 0 | $0 | 10,500 | $7,612,853 | 0 | $0 |
| 2024-02 | 0 | $0 | 24,899 | $15,863,672 | 0 | $0 |
| 2024-01 | 0 | $0 | 198,959 | $116,132,829 | 0 | $0 |
| 2023-12 | 0 | $0 | 21,110 | $12,743,675 | 0 | $0 |
| 2023-11 | 0 | $0 | 17,962 | $9,028,963 | 0 | $0 |
| 2023-10 | 0 | $0 | 24,780 | $11,356,672 | 0 | $0 |
| 2023-08 | 0 | $0 | 14,313 | $7,546,046 | 0 | $0 |
| 2023-07 | 0 | $0 | 90,273 | $48,314,755 | 0 | $0 |
| 2023-05 | 0 | $0 | 38,217 | $17,359,072 | 0 | $0 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-09-02 | Blegen Theodore (EVP and CFO) | Sale | 3,000 | 813.62 | 2,440,851 |
| 2025-08-29 | Elmiger Eugen J | Sale | 4,000 | 846.87 | 3,387,460 |
| 2025-08-27 | Zhou Jeff | Sale | 193 | 870.00 | 167,910 |
| 2025-08-15 | Hsing Michael (CEO) | Sale | 20,231 | 830.67 | 16,805,385 |
| 2025-08-13 | Zhou Jeff | Sale | 400 | 850.00 | 340,000 |
| 2025-08-12 | Zhou Jeff | Sale | 200 | 830.00 | 166,000 |
| 2025-08-01 | Blegen Theodore (EVP and CFO) | Sale | 3,000 | 750.00 | 2,250,000 |
| 2025-08-01 | Xiao Deming (EVP, Global Operations) | Sale | 39,999 | 780.00 | 31,199,220 |
| 2025-07-01 | Blegen Theodore (EVP and CFO) | Sale | 6,000 | 750.00 | 4,500,000 |
| 2025-05-13 | Chang Kuo Wei Herbert | Sale | 50 | 738.00 | 36,900 |
| 2025-05-12 | Sciammas Maurice (EVP, WW Sales & Marketing) | Sale | 12,000 | 701.00 | 8,412,000 |
| 2025-05-12 | Chang Kuo Wei Herbert | Sale | 100 | 698.00 | 69,800 |
| 2025-05-08 | Chang Kuo Wei Herbert | Sale | 100 | 650.00 | 65,000 |
| 2025-02-18 | Hsing Michael (CEO) | Sale | 5,200 | 700.00 | 3,640,000 |
| 2025-02-10 | Blegen Theodore (EVP and CFO) | Sale | 532 | 717.10 | 381,497 |
| 2025-02-10 | Sciammas Maurice (EVP, WW Sales & Marketing) | Sale | 662 | 717.10 | 474,720 |
| 2025-02-10 | Tseng Saria (EVP & General Counsel) | Sale | 663 | 717.10 | 475,437 |
| 2025-02-10 | Hsing Michael (CEO) | Sale | 2,594 | 717.10 | 1,860,157 |
| 2025-02-10 | Xiao Deming (EVP, Global Operations) | Sale | 662 | 717.10 | 474,720 |
| 2025-02-07 | Sciammas Maurice (EVP, WW Sales & Marketing) | Sale | 7,000 | 703.07 | 4,921,490 |
| 2025-02-07 | Hsing Michael (CEO) | Sale | 11,964 | 700.00 | 8,374,800 |
| 2025-01-24 | Hsing Michael (CEO) | Sale | 3,636 | 700.00 | 2,545,200 |
| 2024-12-09 | Blegen Theodore (EVP and CFO) | Sale | 2,500 | 600.00 | 1,500,000 |
| 2024-11-08 | Blegen Theodore (EVP and CFO) | Sale | 734 | 765.15 | 561,620 |
| 2024-11-08 | Sciammas Maurice (EVP, WW Sales & Marketing) | Sale | 866 | 765.14 | 662,611 |
| 2024-11-08 | Tseng Saria (EVP & General Counsel) | Sale | 866 | 765.14 | 662,611 |
| 2024-11-08 | Hsing Michael (CEO) | Sale | 2,812 | 765.15 | 2,151,601 |
| 2024-11-08 | Xiao Deming (EVP, Global Operations) | Sale | 866 | 765.14 | 662,611 |
| 2024-11-01 | Blegen Theodore (EVP and CFO) | Sale | 2,500 | 771.78 | 1,929,445 |
| 2024-10-07 | Sciammas Maurice (EVP, WW Sales & Marketing) | Sale | 11,000 | 929.37 | 10,223,059 |
| 2024-10-01 | Blegen Theodore (EVP and CFO) | Sale | 2,500 | 909.03 | 2,272,572 |
| 2024-09-03 | Blegen Theodore (EVP and CFO) | Sale | 2,500 | 904.49 | 2,261,222 |
| 2024-08-27 | Xiao Deming (EVP, Global Operations) | Sale | 9,259 | 950.00 | 8,796,050 |
| 2024-08-22 | Xiao Deming (EVP, Global Operations) | Sale | 10,000 | 950.00 | 9,500,000 |
| 2024-08-16 | Hsing Michael (CEO) | Sale | 100 | 823.27 | 82,327 |
| 2024-08-15 | Chang Kuo Wei Herbert | Sale | 200 | 893.44 | 178,688 |
| 2024-08-09 | Hsing Michael (CEO) | Sale | 4,163 | 827.07 | 3,443,088 |
| 2024-08-08 | Blegen Theodore (EVP and CFO) | Sale | 728 | 778.39 | 566,667 |
| 2024-08-08 | Sciammas Maurice (EVP, WW Sales & Marketing) | Sale | 859 | 778.39 | 668,637 |
| 2024-08-08 | Tseng Saria (EVP & General Counsel) | Sale | 859 | 778.39 | 668,637 |
| 2024-08-08 | Hsing Michael (CEO) | Sale | 2,790 | 778.39 | 2,171,708 |
| 2024-08-08 | Xiao Deming (EVP, Global Operations) | Sale | 859 | 778.39 | 668,637 |
| 2024-08-01 | Blegen Theodore (EVP and CFO) | Sale | 2,500 | 852.74 | 2,131,855 |
| 2024-07-22 | Blegen Theodore (EVP and CFO) | Sale | 2,580 | 831.58 | 2,145,476 |
| 2024-07-22 | Sciammas Maurice (EVP, WW Sales & Marketing) | Sale | 3,205 | 831.58 | 2,665,213 |
| 2024-07-22 | Tseng Saria (EVP & General Counsel) | Sale | 3,205 | 831.58 | 2,665,213 |
| 2024-07-22 | Hsing Michael (CEO) | Sale | 9,614 | 831.58 | 7,994,810 |
| 2024-07-22 | Xiao Deming (EVP, Global Operations) | Sale | 3,205 | 831.58 | 2,665,213 |
| 2024-07-08 | Sciammas Maurice (EVP, WW Sales & Marketing) | Sale | 10,999 | 844.00 | 9,283,112 |
| 2024-07-02 | Tseng Saria (EVP & General Counsel) | Sale | 1,858 | 824.65 | 1,532,199 |
| 2024-07-01 | Blegen Theodore (EVP and CFO) | Sale | 2,500 | 802.65 | 2,006,617 |
| 2024-07-01 | Tseng Saria (EVP & General Counsel) | Sale | 37,093 | 804.74 | 29,850,109 |
| 2024-07-01 | Hsing Michael (CEO) | Sale | 2,672 | 802.10 | 2,143,208 |
| 2024-06-28 | Lee Victor K | Sale | 1,000 | 820.46 | 820,460 |
| 2024-06-10 | Blegen Theodore (EVP and CFO) | Sale | 84 | 741.66 | 62,299 |
| 2024-06-03 | Blegen Theodore (EVP and CFO) | Sale | 2,416 | 730.67 | 1,765,301 |
| 2024-06-03 | Hsing Michael (CEO) | Sale | 8,000 | 730.12 | 5,840,936 |
| 2024-05-22 | Xiao Deming (EVP, Global Operations) | Sale | 1,300 | 769.40 | 1,000,220 |
| 2024-05-20 | Zhou Jeff | Sale | 200 | 750.00 | 150,000 |
| 2024-05-20 | Chang Kuo Wei Herbert | Sale | 200 | 750.00 | 150,000 |
| 2024-05-15 | Chang Kuo Wei Herbert | Sale | 200 | 735.00 | 147,000 |
| 2024-05-08 | Blegen Theodore (EVP and CFO) | Sale | 737 | 689.98 | 508,515 |
| 2024-05-08 | Sciammas Maurice (EVP, WW Sales & Marketing) | Sale | 869 | 690.00 | 599,610 |
| 2024-05-08 | Tseng Saria (EVP & General Counsel) | Sale | 869 | 690.02 | 599,627 |
| 2024-05-08 | Hsing Michael (CEO) | Sale | 2,824 | 690.00 | 1,948,560 |
| 2024-05-08 | Xiao Deming (EVP, Global Operations) | Sale | 869 | 690.02 | 599,627 |
| 2024-05-01 | Blegen Theodore (EVP and CFO) | Sale | 2,500 | 663.66 | 1,659,152 |
| 2024-05-01 | Hsing Michael (CEO) | Sale | 8,000 | 661.52 | 5,292,144 |
| 2024-04-08 | Sciammas Maurice (EVP of Sales and Marketing) | Sale | 11,000 | 681.06 | 7,491,671 |
| 2024-04-01 | Hsing Michael (CEO) | Sale | 8,000 | 678.76 | 5,430,104 |
| 2024-03-01 | Blegen Theodore (CFO) | Sale | 2,500 | 725.57 | 1,813,925 |
| 2024-03-01 | Hsing Michael (CEO) | Sale | 8,000 | 724.87 | 5,798,928 |
| 2024-02-29 | Chang Kuo Wei Herbert | Sale | 250 | 706.34 | 176,585 |
| 2024-02-22 | Chang Kuo Wei Herbert | Sale | 250 | 750.00 | 187,500 |
| 2024-02-12 | Zhou Jeff | Sale | 200 | 750.57 | 150,114 |
| 2024-02-08 | Blegen Theodore (CFO) | Sale | 728 | 680.00 | 495,040 |
| 2024-02-08 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 859 | 680.00 | 584,120 |
| 2024-02-08 | Tseng Saria (Executive VP & General Counsel) | Sale | 859 | 680.00 | 584,120 |
| 2024-02-08 | Hsing Michael (CEO) | Sale | 2,790 | 680.00 | 1,897,200 |
| 2024-02-08 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 859 | 680.00 | 584,120 |
| 2024-02-05 | Blegen Theodore (CFO) | Sale | 867 | 641.00 | 555,747 |
| 2024-02-05 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 982 | 641.00 | 629,462 |
| 2024-02-05 | Tseng Saria (Executive VP & General Counsel) | Sale | 982 | 641.00 | 629,462 |
| 2024-02-05 | Hsing Michael (CEO) | Sale | 3,791 | 641.00 | 2,430,031 |
| 2024-02-05 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 982 | 641.00 | 629,462 |
| 2024-02-01 | Blegen Theodore (CFO) | Sale | 2,500 | 604.80 | 1,511,997 |
| 2024-02-01 | Hsing Michael (CEO) | Sale | 8,000 | 602.34 | 4,818,712 |
| 2024-01-12 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 11,000 | 583.74 | 6,421,107 |
| 2024-01-10 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 11,515 | 590.35 | 6,797,834 |
| 2024-01-09 | Tseng Saria (Executive VP & General Counsel) | Sale | 1,390 | 600.00 | 834,000 |
| 2024-01-05 | Hsing Michael (CEO) | Sale | 8,000 | 573.02 | 4,584,160 |
| 2024-01-04 | Blegen Theodore (CFO) | Sale | 27,613 | 583.14 | 16,102,244 |
| 2024-01-04 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 27,659 | 583.14 | 16,129,069 |
| 2024-01-04 | Tseng Saria (Executive VP & General Counsel) | Sale | 25,314 | 583.14 | 14,761,605 |
| 2024-01-04 | Hsing Michael (CEO) | Sale | 58,654 | 583.14 | 34,203,493 |
| 2024-01-04 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 25,314 | 583.14 | 14,761,605 |
| 2024-01-02 | Blegen Theodore (CFO) | Sale | 2,500 | 615.09 | 1,537,712 |
| 2023-12-18 | Blegen Theodore (CFO) | Sale | 2,500 | 631.07 | 1,577,675 |
| 2023-12-13 | Tseng Saria (Executive VP & General Counsel) | Sale | 18,610 | 600.00 | 11,166,000 |
| 2023-11-16 | Moyer James C | Sale | 3,800 | 539.37 | 2,049,617 |
| 2023-11-14 | Chang Kuo Wei Herbert | Sale | 400 | 523.64 | 209,456 |
| 2023-11-13 | Chang Kuo Wei Herbert | Sale | 100 | 510.00 | 51,000 |
| 2023-11-08 | Blegen Theodore (CFO) | Sale | 712 | 490.39 | 349,157 |
| 2023-11-08 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 859 | 490.39 | 421,245 |
| 2023-11-08 | Tseng Saria (VP & General Counsel) | Sale | 859 | 490.39 | 421,245 |
| 2023-11-08 | Hsing Michael (CEO) | Sale | 2,790 | 490.39 | 1,368,188 |
| 2023-11-08 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 859 | 490.39 | 421,245 |
| 2023-11-06 | Blegen Theodore (CFO) | Sale | 847 | 492.92 | 417,503 |
| 2023-11-06 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 982 | 492.92 | 484,047 |
| 2023-11-06 | Tseng Saria (VP & General Counsel) | Sale | 982 | 492.92 | 484,047 |
| 2023-11-06 | Hsing Michael (CEO) | Sale | 3,790 | 492.92 | 1,868,166 |
| 2023-11-06 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 982 | 492.92 | 484,047 |
| 2023-10-02 | Blegen Theodore (CFO) | Sale | 905 | 458.30 | 414,761 |
| 2023-10-02 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 4,305 | 458.30 | 1,972,981 |
| 2023-10-02 | Tseng Saria (VP & General Counsel) | Sale | 4,305 | 458.30 | 1,972,981 |
| 2023-10-02 | Hsing Michael (CEO) | Sale | 10,960 | 458.30 | 5,022,968 |
| 2023-10-02 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,305 | 458.30 | 1,972,981 |
| 2023-08-29 | Chang Kuo Wei Herbert | Sale | 500 | 500.00 | 250,000 |
| 2023-08-08 | Blegen Theodore (CFO) | Sale | 724 | 530.28 | 383,922 |
| 2023-08-08 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 874 | 530.26 | 463,447 |
| 2023-08-08 | Tseng Saria (VP & General Counsel) | Sale | 874 | 530.27 | 463,455 |
| 2023-08-08 | Hsing Michael (CEO) | Sale | 2,836 | 530.26 | 1,503,817 |
| 2023-08-08 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 874 | 530.26 | 463,447 |
| 2023-08-04 | Blegen Theodore (CFO) | Sale | 852 | 526.52 | 448,595 |
| 2023-08-04 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 988 | 526.52 | 520,201 |
| 2023-08-04 | Tseng Saria (VP & General Counsel) | Sale | 988 | 526.52 | 520,201 |
| 2023-08-04 | Hsing Michael (CEO) | Sale | 3,815 | 526.54 | 2,008,750 |
| 2023-08-04 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 988 | 526.53 | 520,211 |
| 2023-07-21 | Blegen Theodore (CFO) | Sale | 7,575 | 534.23 | 4,046,792 |
| 2023-07-21 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 9,843 | 534.23 | 5,258,425 |
| 2023-07-21 | Tseng Saria (VP & General Counsel) | Sale | 9,615 | 534.23 | 5,136,621 |
| 2023-07-21 | Hsing Michael (CEO) | Sale | 28,845 | 534.23 | 15,409,864 |
| 2023-07-21 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 9,615 | 534.23 | 5,136,621 |
| 2023-07-03 | Blegen Theodore (CFO) | Sale | 905 | 537.79 | 486,699 |
| 2023-07-03 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 4,305 | 537.79 | 2,315,185 |
| 2023-07-03 | Tseng Saria (VP & General Counsel) | Sale | 4,305 | 537.79 | 2,315,185 |
| 2023-07-03 | Hsing Michael (CEO) | Sale | 10,960 | 537.79 | 5,894,178 |
| 2023-07-03 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,305 | 537.79 | 2,315,185 |
| 2023-05-09 | Blegen Theodore (CFO) | Sale | 711 | 409.78 | 291,353 |
| 2023-05-09 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 857 | 409.78 | 351,181 |
| 2023-05-09 | Tseng Saria (VP & General Counsel) | Sale | 857 | 409.81 | 351,207 |
| 2023-05-09 | Hsing Michael (CEO) | Sale | 2,785 | 409.78 | 1,141,237 |
| 2023-05-09 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 857 | 409.79 | 351,190 |
| 2023-05-04 | Blegen Theodore (CFO) | Sale | 854 | 459.60 | 392,498 |
| 2023-05-04 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 991 | 459.60 | 455,463 |
| 2023-05-04 | Tseng Saria (VP & General Counsel) | Sale | 991 | 459.60 | 455,463 |
| 2023-05-04 | Hsing Michael (CEO) | Sale | 3,825 | 459.60 | 1,757,970 |
| 2023-05-04 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 991 | 459.60 | 455,463 |
| 2023-05-03 | Blegen Theodore (CFO) | Sale | 2,870 | 463.55 | 1,330,388 |
| 2023-05-03 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 3,462 | 463.55 | 1,604,810 |
Insider trading activities including stock purchases, stock sales, and option exercises of MPWR listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Monolithic Power Systems Inc (symbol MPWR, CIK number 1280452) see the Securities and Exchange Commission (SEC) website.