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. (See page 1 of this report.) 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 | $5,871,983 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2021-06-21 | Blegen Theodore (CFO) | Sale | 1,897 | 353.17 | 669,963 |
| 2021-05-28 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 2,485 | 343.76 | 854,243 |
| 2021-05-20 | Blegen Theodore (CFO) | Sale | 1,897 | 330.00 | 626,010 |
| 2021-05-12 | Blegen Theodore (CFO) | Sale | 1,437 | 311.82 | 448,089 |
| 2021-05-12 | Hsing Michael (CEO) | Sale | 6,723 | 311.82 | 2,096,365 |
| 2021-05-12 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 1,741 | 311.83 | 542,892 |
| 2021-05-10 | Blegen Theodore (CFO) | Sale | 1,562 | 326.40 | 509,838 |
| 2021-05-10 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 1,233 | 326.40 | 402,457 |
| 2021-05-10 | Tseng Saria (VP & General Counsel) | Sale | 2,196 | 326.41 | 716,805 |
| 2021-05-10 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 2,196 | 326.41 | 716,805 |
| 2021-04-20 | Blegen Theodore (CFO) | Sale | 1,897 | 366.58 | 695,404 |
| 2021-04-01 | Blegen Theodore (CFO) | Sale | 905 | 364.78 | 330,123 |
| 2021-04-01 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 5,508 | 364.23 | 2,006,151 |
| 2021-04-01 | Tseng Saria (VP & General Counsel) | Sale | 4,305 | 364.78 | 1,570,364 |
| 2021-04-01 | Hsing Michael (CEO) | Sale | 10,960 | 364.78 | 3,997,955 |
| 2021-04-01 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,305 | 364.78 | 1,570,364 |
| 2021-03-30 | Hsing Michael (CEO) | Sale | 63,583 | 340.00 | 21,618,537 |
| 2021-03-22 | Blegen Theodore (CFO) | Sale | 1,897 | 349.85 | 663,671 |
| 2021-02-26 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 3,000 | 374.00 | 1,122,000 |
| 2021-02-26 | Chang Kuo Wei Herbert (Director) | Sale | 300 | 370.00 | 111,000 |
| 2021-02-24 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 1,000 | 383.47 | 383,470 |
| 2021-02-19 | Blegen Theodore (CFO) | Sale | 4,299 | 387.02 | 1,663,794 |
| 2021-02-19 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 172 | 379.93 | 65,347 |
| 2021-02-17 | Tseng Saria (VP & General Counsel) | Sale | 22,026 | 378.29 | 8,332,193 |
| 2021-02-16 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 11,000 | 390.70 | 4,297,678 |
| 2021-02-16 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 5,000 | 398.00 | 1,990,000 |
| 2021-02-12 | Zhou Jeff (Director) | Sale | 200 | 388.00 | 77,600 |
| 2021-02-11 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 5,000 | 379.95 | 1,899,764 |
| 2021-02-10 | Hsing Michael (CEO) | Sale | 19,067 | 375.75 | 7,164,482 |
| 2021-02-09 | Blegen Theodore (CFO) | Sale | 2,922 | 372.89 | 1,089,590 |
| 2021-02-09 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 25,491 | 373.91 | 9,547,301 |
| 2021-02-09 | Tseng Saria (VP & General Counsel) | Sale | 4,092 | 372.89 | 1,525,874 |
| 2021-02-09 | Hsing Michael (CEO) | Sale | 14,899 | 372.89 | 5,555,717 |
| 2021-02-09 | Moyer James C (Director) | Sale | 15,000 | 374.52 | 5,617,785 |
| 2021-02-09 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,092 | 372.89 | 1,525,874 |
| 2021-02-05 | Blegen Theodore (CFO) | Sale | 11,010 | 366.34 | 4,033,381 |
| 2021-02-05 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 15,875 | 366.34 | 5,815,615 |
| 2021-02-05 | Tseng Saria (VP & General Counsel) | Sale | 13,358 | 366.34 | 4,893,543 |
| 2021-02-05 | Hsing Michael (CEO) | Sale | 52,729 | 366.34 | 19,316,636 |
| 2021-02-05 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 13,359 | 366.34 | 4,893,909 |
| 2021-02-02 | Blegen Theodore (CFO) | Option Ex | 20,105 | .00 | 0 |
| 2021-02-02 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Option Ex | 32,165 | .00 | 0 |
| 2021-02-02 | Tseng Saria (VP & General Counsel) | Option Ex | 32,165 | .00 | 0 |
| 2021-02-02 | Hsing Michael (CEO) | Option Ex | 96,500 | .00 | 0 |
| 2021-02-02 | Xiao Deming (Pres. of MPS Asia Operations) | Option Ex | 32,165 | .00 | 0 |
| 2021-01-20 | Blegen Theodore (CFO) | Sale | 1,919 | 397.59 | 762,967 |
| 2021-01-14 | Tseng Saria (VP & General Counsel) | Sale | 21,730 | 389.36 | 8,460,749 |
| 2021-01-06 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 23,090 | 367.02 | 8,474,422 |
| 2021-01-05 | Hsing Michael (CEO) | Sale | 44,784 | 367.20 | 16,444,774 |
| 2021-01-04 | Blegen Theodore (CFO) | Sale | 905 | 368.26 | 333,276 |
| 2021-01-04 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 5,325 | 368.26 | 1,960,989 |
| 2021-01-04 | Tseng Saria (VP & General Counsel) | Sale | 4,305 | 368.26 | 1,585,363 |
| 2021-01-04 | Hsing Michael (CEO) | Sale | 10,960 | 368.26 | 4,036,140 |
| 2021-01-04 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,305 | 368.26 | 1,585,363 |
| 2020-12-21 | Blegen Theodore (CFO) | Sale | 1,418 | 346.54 | 491,389 |
| 2020-12-08 | Moyer James C (Director) | Sale | 15,000 | 321.62 | 4,824,225 |
| 2020-11-19 | Blegen Theodore (CFO) | Sale | 1,420 | 309.57 | 439,585 |
| 2020-11-13 | Tseng Saria (VP & General Counsel) | Sale | 4,886 | 307.70 | 1,503,417 |
| 2020-11-13 | Moyer James C (Director) | Sale | 1,000 | 307.70 | 307,699 |
| 2020-11-10 | Hsing Michael (CEO) | Sale | 17,796 | 308.46 | 5,489,318 |
| 2020-11-10 | Moyer James C (Director) | Sale | 15,000 | 308.38 | 4,625,715 |
| 2020-11-09 | Blegen Theodore (CFO) | Sale | 3,169 | 333.51 | 1,056,902 |
| 2020-11-09 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 5,377 | 333.51 | 1,793,310 |
| 2020-11-09 | Tseng Saria (VP & General Counsel) | Sale | 4,441 | 333.50 | 1,481,095 |
| 2020-11-09 | Hsing Michael (CEO) | Sale | 16,170 | 333.51 | 5,392,937 |
| 2020-11-09 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,441 | 333.52 | 1,481,175 |
| 2020-11-06 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 3,897 | 356.00 | 1,387,332 |
| 2020-11-04 | Chang Kuo Wei Herbert (Director) | Sale | 3,000 | 326.33 | 978,999 |
| 2020-11-03 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 20,000 | 315.39 | 6,307,760 |
| 2020-10-19 | Blegen Theodore (CFO) | Sale | 1,534 | 315.49 | 483,960 |
| 2020-10-15 | Tseng Saria (VP & General Counsel) | Sale | 6,495 | 317.48 | 2,062,032 |
| 2020-10-02 | Hsing Michael (CEO) | Sale | 16,540 | 274.07 | 4,533,150 |
| 2020-10-01 | Blegen Theodore (CFO) | Sale | 905 | 280.50 | 253,856 |
| 2020-10-01 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 5,425 | 280.50 | 1,521,734 |
| 2020-10-01 | Tseng Saria (VP & General Counsel) | Sale | 4,305 | 280.50 | 1,207,569 |
| 2020-10-01 | Hsing Michael (CEO) | Sale | 10,960 | 280.50 | 3,074,323 |
| 2020-10-01 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,305 | 280.50 | 1,207,569 |
| 2020-09-18 | Blegen Theodore (CFO) | Sale | 1,408 | 252.81 | 355,949 |
| 2020-09-08 | Moyer James C (Director) | Sale | 15,000 | 248.03 | 3,720,465 |
| 2020-08-28 | Zhou Jeff (Director) | Sale | 393 | 267.18 | 104,999 |
| 2020-08-28 | Chang Kuo Wei Herbert (Director) | Sale | 1,300 | 268.00 | 348,400 |
| 2020-08-19 | Blegen Theodore (CFO) | Sale | 1,404 | 277.23 | 389,230 |
| 2020-08-19 | Tseng Saria (VP & General Counsel) | Sale | 4,982 | 276.80 | 1,379,037 |
| 2020-08-13 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,917 | 281.00 | 1,381,677 |
| 2020-08-12 | Chang Kuo Wei Herbert (Director) | Sale | 400 | 279.50 | 111,800 |
| 2020-08-11 | Hsing Michael (CEO) | Sale | 17,909 | 271.43 | 4,860,950 |
| 2020-08-10 | Blegen Theodore (CFO) | Sale | 3,116 | 274.40 | 855,036 |
| 2020-08-10 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 5,287 | 274.40 | 1,450,763 |
| 2020-08-10 | Tseng Saria (VP & General Counsel) | Sale | 4,410 | 274.40 | 1,210,112 |
| 2020-08-10 | Hsing Michael (CEO) | Sale | 16,057 | 274.40 | 4,406,072 |
| 2020-08-10 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,410 | 274.40 | 1,210,112 |
| 2020-08-07 | Zhou Jeff (Director) | Sale | 200 | 283.00 | 56,600 |
| 2020-08-07 | Chang Kuo Wei Herbert (Director) | Sale | 100 | 283.00 | 28,300 |
| 2020-08-06 | Zhou Jeff (Director) | Sale | 200 | 279.00 | 55,800 |
| 2020-08-06 | Chang Kuo Wei Herbert (Director) | Sale | 600 | 280.00 | 168,000 |
| 2020-08-05 | Zhou Jeff (Director) | Sale | 200 | 276.00 | 55,200 |
| 2020-08-05 | Chang Kuo Wei Herbert (Director) | Sale | 600 | 276.00 | 165,600 |
| 2020-08-04 | Zhou Jeff (Director) | Sale | 47 | 273.00 | 12,831 |
| 2020-08-04 | Chang Kuo Wei Herbert (Director) | Sale | 200 | 274.50 | 54,900 |
| 2020-08-03 | Zhou Jeff (Director) | Sale | 153 | 273.00 | 41,769 |
| 2020-08-03 | Chang Kuo Wei Herbert (Director) | Sale | 476 | 271.26 | 129,120 |
| 2020-07-31 | Zhou Jeff (Director) | Sale | 300 | 271.62 | 81,486 |
| 2020-07-20 | Blegen Theodore (CFO) | Sale | 2,408 | 249.34 | 600,410 |
| 2020-07-15 | Tseng Saria (VP & General Counsel) | Sale | 6,495 | 246.06 | 1,598,146 |
| 2020-07-06 | Hsing Michael (CEO) | Sale | 16,540 | 241.38 | 3,992,441 |
| 2020-07-01 | Blegen Theodore (CFO) | Sale | 905 | 235.16 | 212,819 |
| 2020-07-01 | Sciammas Maurice (Sr. V.P. of Sales & Marketing) | Sale | 5,425 | 235.16 | 1,275,743 |
| 2020-07-01 | Tseng Saria (VP & General Counsel) | Sale | 4,305 | 235.16 | 1,012,363 |
| 2020-07-01 | Hsing Michael (CEO) | Sale | 10,960 | 235.16 | 2,577,353 |
| 2020-07-01 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,305 | 235.16 | 1,012,363 |
| 2020-06-19 | Blegen Theodore (CFO) | Sale | 1,408 | 224.13 | 315,570 |
| 2020-05-19 | Blegen Theodore (CFO) | Sale | 1,408 | 204.91 | 288,507 |
| 2020-05-18 | Tseng Saria (VP & General Counsel) | Sale | 4,762 | 200.10 | 952,895 |
| 2020-05-14 | Moyer James C (Director) | Sale | 10,000 | 195.34 | 1,953,420 |
| 2020-05-12 | Zhou Jeff (Director) | Sale | 2,000 | 217.00 | 434,000 |
| 2020-05-11 | Hsing Michael (CEO) | Sale | 17,348 | 209.96 | 3,642,351 |
| 2020-05-11 | Moyer James C (Director) | Sale | 14,000 | 210.43 | 2,946,006 |
| 2020-05-11 | Chang Kuo Wei Herbert (Director) | Sale | 2,000 | 212.00 | 424,000 |
| 2020-05-08 | Blegen Theodore (CFO) | Sale | 3,177 | 208.67 | 662,938 |
| 2020-05-08 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 5,388 | 208.67 | 1,124,303 |
| 2020-05-08 | Tseng Saria (VP & General Counsel) | Sale | 4,565 | 208.67 | 952,569 |
| 2020-05-08 | Hsing Michael (CEO) | Sale | 16,619 | 208.67 | 3,467,853 |
| 2020-05-08 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,565 | 208.67 | 952,569 |
| 2020-05-08 | Chang Kuo Wei Herbert (Director) | Sale | 1,026 | 208.00 | 213,408 |
| 2020-05-07 | Zhou Jeff (Director) | Sale | 590 | 205.00 | 120,950 |
| 2020-05-05 | Zhou Jeff (Director) | Sale | 500 | 198.00 | 99,000 |
| 2020-04-29 | Tseng Saria (VP & General Counsel) | Sale | 18,171 | 200.00 | 3,634,218 |
| 2020-04-20 | Blegen Theodore (CFO) | Sale | 2,447 | 182.97 | 447,737 |
| 2020-04-17 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 49,161 | 185.01 | 9,095,079 |
| 2020-04-13 | Moyer James C (Director) | Sale | 14,000 | 170.75 | 2,390,430 |
| 2020-04-07 | Hsing Michael (CEO) | Sale | 95,979 | 170.00 | 16,316,430 |
| 2020-04-06 | Hsing Michael (CEO) | Sale | 17,742 | 170.00 | 3,016,140 |
| 2020-04-01 | Blegen Theodore (CFO) | Sale | 920 | 162.58 | 149,573 |
| 2020-04-01 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 5,520 | 162.57 | 897,408 |
| 2020-04-01 | Tseng Saria (VP & General Counsel) | Sale | 4,380 | 162.57 | 712,078 |
| 2020-04-01 | Hsing Michael (CEO) | Sale | 11,150 | 162.57 | 1,812,711 |
| 2020-04-01 | Xiao Deming (Pres. of MPS Asia Operations) | Sale | 4,380 | 162.57 | 712,078 |
| 2020-03-31 | Hsing Michael (CEO) | Sale | 23,258 | 170.00 | 3,953,860 |
| 2020-03-24 | Blegen Theodore (CFO) | Sale | 1,408 | 160.00 | 225,280 |
| 2020-03-09 | Moyer James C (Director) | Sale | 19,000 | 152.66 | 2,900,597 |
| 2020-02-20 | Tseng Saria (VP & General Counsel) | Sale | 24,773 | 185.73 | 4,601,114 |
| 2020-02-20 | Moyer James C (Director) | Sale | 10,000 | 184.38 | 1,843,830 |
| 2020-02-18 | Blegen Theodore (CFO) | Sale | 49 | 187.81 | 9,202 |
| 2020-02-13 | Zhou Jeff (Director) | Sale | 500 | 191.00 | 95,500 |
| 2020-02-13 | Chang Kuo Wei Herbert (Director) | Sale | 1,000 | 192.00 | 192,000 |
| 2020-02-11 | Zhou Jeff (Director) | Sale | 1,033 | 186.00 | 192,138 |
| 2020-02-11 | Chang Kuo Wei Herbert (Director) | Sale | 1,000 | 187.72 | 187,717 |
| 2020-02-10 | Zhou Jeff (Director) | Sale | 1,500 | 182.24 | 273,364 |
| 2020-02-10 | Blegen Theodore (CFO) | Sale | 1,611 | 181.07 | 291,710 |
| 2020-02-10 | Sciammas Maurice (Sr. V.P.of Sales and Marketing) | Sale | 2,728 | 181.07 | 493,969 |
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.