The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Chang Kuo Wei Herbert since 2005.
This trader's CIK number is 1192171.
At the time of last reporting, Chang Kuo Wei Herbert was the Officer of Monolithic Power Systems Inc. (stock ticker symbol MPWR).
Also see all insider trading activities at Monolithic Power Systems Inc.
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2011 | MRVL | 0 | $0 | 24,000 | $386,520 | 24,000 | $123,478 |
| 2010 | MRVL | 0 | $0 | 120,000 | $2,163,909 | 120,000 | $450,000 |
| 2006 | MRVL | 0 | $0 | 7,000 | $459,620 | 0 | $0 |
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2025 | MPWR | 0 | $0 | 250 | $171,700 | 0 | $0 |
| 2024 | MPWR | 0 | $0 | 1,100 | $839,773 | 0 | $0 |
| 2023 | MPWR | 0 | $0 | 1,000 | $510,456 | 0 | $0 |
| 2021 | MPWR | 0 | $0 | 300 | $111,000 | 0 | $0 |
| 2020 | MPWR | 0 | $0 | 11,702 | $3,002,244 | 0 | $0 |
| 2014 | MPWR | 0 | $0 | 12,254 | $439,425 | 0 | $0 |
| 2013 | MPWR | 0 | $0 | 97,942 | $2,814,608 | 17,799 | $384,418 |
| 2012 | MPWR | 0 | $0 | 124,189 | $2,536,248 | 93,000 | $1,339,899 |
| 2011 | MPWR | 0 | $0 | 161,819 | $2,607,398 | 0 | $0 |
| 2010 | MPWR | 0 | $0 | 40,000 | $647,900 | 80,000 | $6,400 |
| 2009 | MPWR | 0 | $0 | 170,000 | $3,966,004 | 0 | $0 |
| 2008 | MPWR | 0 | $0 | 1,100,000 | $28,928,358 | 0 | $0 |
| 2007 | MPWR | 0 | $0 | 753,793 | $14,837,095 | 0 | $0 |
| 2005 | MPWR | 0 | $0 | 60,772 | $425,494 | 0 | $0 |
1. Marvell Technology Group Ltd (MRVL)
2. Monolithic Power Systems Inc (MPWR)
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2011-03-28 | MRVL | Option Ex | 12,000 | 5.14 | 61,739 |
| 2011-03-29 | MRVL | Option Ex | 12,000 | 5.14 | 61,739 |
| 2011-03-28 | MRVL | Sale | 12,000 | 16.09 | 193,080 |
| 2011-03-29 | MRVL | Sale | 12,000 | 16.12 | 193,440 |
| 2010-06-10 | MRVL | Sale | 4,200 | 17.51 | 73,525 |
| 2010-06-11 | MRVL | Sale | 25,800 | 17.68 | 456,144 |
| 2010-06-14 | MRVL | Option Ex | 50,000 | 3.75 | 187,500 |
| 2010-06-14 | MRVL | Sale | 50,000 | 17.92 | 896,200 |
| 2010-06-10 | MRVL | Option Ex | 4,200 | 3.75 | 15,750 |
| 2010-06-11 | MRVL | Option Ex | 25,800 | 3.75 | 96,750 |
| 2010-06-07 | MRVL | Sale | 40,000 | 18.45 | 738,040 |
| 2010-06-07 | MRVL | Option Ex | 40,000 | 3.75 | 150,000 |
| 2006-01-19 | MRVL | Sale | 7,000 | 65.66 | 459,620 |
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-05-13 | MPWR | Sale | 50 | 738.00 | 36,900 |
| 2025-05-12 | MPWR | Sale | 100 | 698.00 | 69,800 |
| 2025-05-08 | MPWR | Sale | 100 | 650.00 | 65,000 |
| 2024-08-15 | MPWR | Sale | 200 | 893.44 | 178,688 |
| 2024-05-20 | MPWR | Sale | 200 | 750.00 | 150,000 |
| 2024-05-15 | MPWR | Sale | 200 | 735.00 | 147,000 |
| 2024-02-29 | MPWR | Sale | 250 | 706.34 | 176,585 |
| 2024-02-22 | MPWR | Sale | 250 | 750.00 | 187,500 |
| 2023-11-14 | MPWR | Sale | 400 | 523.64 | 209,456 |
| 2023-11-13 | MPWR | Sale | 100 | 510.00 | 51,000 |
| 2023-08-29 | MPWR | Sale | 500 | 500.00 | 250,000 |
| 2021-02-26 | MPWR | Sale | 300 | 370.00 | 111,000 |
| 2020-11-04 | MPWR | Sale | 3,000 | 326.33 | 978,999 |
| 2020-08-28 | MPWR | Sale | 1,300 | 268.00 | 348,400 |
| 2020-08-12 | MPWR | Sale | 400 | 279.50 | 111,800 |
| 2020-08-06 | MPWR | Sale | 600 | 280.00 | 168,000 |
| 2020-08-07 | MPWR | Sale | 100 | 283.00 | 28,300 |
| 2020-08-03 | MPWR | Sale | 476 | 271.26 | 129,120 |
| 2020-08-04 | MPWR | Sale | 200 | 274.50 | 54,900 |
| 2020-08-05 | MPWR | Sale | 600 | 276.00 | 165,600 |
| 2020-05-11 | MPWR | Sale | 2,000 | 212.00 | 424,000 |
| 2020-05-08 | MPWR | Sale | 1,026 | 208.00 | 213,408 |
| 2020-02-13 | MPWR | Sale | 1,000 | 192.00 | 192,000 |
| 2020-02-11 | MPWR | Sale | 1,000 | 187.72 | 187,717 |
| 2014-02-26 | MPWR | Sale | 7,254 | 36.06 | 261,550 |
| 2014-02-24 | MPWR | Sale | 5,000 | 35.58 | 177,875 |
| 2013-11-29 | MPWR | Sale | 2,643 | 33.75 | 89,201 |
| 2013-11-27 | MPWR | Sale | 8,000 | 33.33 | 266,600 |
| 2013-11-11 | MPWR | Sale | 10,000 | 32.13 | 321,300 |
| 2013-11-13 | MPWR | Sale | 10,000 | 33.13 | 331,300 |
| 2013-11-07 | MPWR | Sale | 1,743 | 32.00 | 55,776 |
| 2013-11-06 | MPWR | Sale | 2,257 | 32.00 | 72,224 |
| 2013-08-28 | MPWR | Sale | 6,000 | 29.05 | 174,300 |
| 2013-08-26 | MPWR | Sale | 4,000 | 29.02 | 116,100 |
| 2013-08-15 | MPWR | Sale | 8,000 | 29.30 | 234,400 |
| 2013-08-13 | MPWR | Sale | 7,108 | 29.28 | 208,122 |
| 2013-08-12 | MPWR | Sale | 392 | 29.00 | 11,368 |
| 2013-08-13 | MPWR | Option Ex | 7,108 | 22.01 | 156,447 |
| 2013-08-12 | MPWR | Option Ex | 392 | 20.65 | 8,094 |
| 2013-05-28 | MPWR | Sale | 5,000 | 24.57 | 122,825 |
| 2013-05-30 | MPWR | Sale | 10,000 | 24.57 | 245,750 |
| 2013-05-31 | MPWR | Sale | 12,500 | 24.75 | 309,425 |
| 2013-02-28 | MPWR | Sale | 2,799 | 24.80 | 69,415 |
| 2013-02-27 | MPWR | Sale | 7,500 | 24.87 | 186,502 |
| 2013-02-28 | MPWR | Option Ex | 2,799 | 22.01 | 61,605 |
| 2013-02-27 | MPWR | Option Ex | 7,500 | 21.10 | 158,272 |
| 2012-08-29 | MPWR | Option Ex | 2,000 | 20.20 | 40,400 |
| 2012-08-29 | MPWR | Sale | 2,000 | 22.01 | 44,022 |
| 2012-08-27 | MPWR | Sale | 9,500 | 22.81 | 216,704 |
| 2012-08-27 | MPWR | Option Ex | 9,500 | 20.20 | 191,900 |
| 2012-08-24 | MPWR | Option Ex | 8,500 | 20.20 | 171,700 |
| 2012-08-23 | MPWR | Sale | 3,000 | 22.27 | 66,801 |
| 2012-08-24 | MPWR | Sale | 8,500 | 22.36 | 190,102 |
| 2012-08-23 | MPWR | Option Ex | 3,000 | 20.20 | 60,600 |
| 2012-08-21 | MPWR | Sale | 11,000 | 22.16 | 243,705 |
| 2012-08-22 | MPWR | Option Ex | 4,000 | 7.51 | 30,040 |
| 2012-08-21 | MPWR | Option Ex | 11,000 | 7.51 | 82,610 |
| 2012-08-22 | MPWR | Sale | 4,000 | 21.93 | 87,720 |
| 2012-08-16 | MPWR | Option Ex | 18,000 | 12.51 | 225,180 |
| 2012-08-16 | MPWR | Sale | 18,000 | 21.43 | 385,704 |
| 2012-08-14 | MPWR | Sale | 2,000 | 12.20 | 24,400 |
| 2012-08-14 | MPWR | Option Ex | 2,000 | 12.86 | 25,720 |
| 2012-08-09 | MPWR | Sale | 12,000 | 21.10 | 253,200 |
| 2012-08-10 | MPWR | Sale | 8,000 | 21.05 | 168,432 |
| 2012-08-09 | MPWR | Option Ex | 12,000 | 12.86 | 154,320 |
| 2012-08-10 | MPWR | Option Ex | 8,000 | 12.86 | 102,880 |
| 2012-02-29 | MPWR | Option Ex | 15,000 | 16.97 | 254,549 |
| 2012-02-29 | MPWR | Sale | 15,000 | 18.98 | 284,775 |
| 2012-02-24 | MPWR | Sale | 10,000 | 18.79 | 187,910 |
| 2012-02-22 | MPWR | Sale | 7,177 | 17.76 | 127,470 |
| 2012-02-23 | MPWR | Sale | 13,000 | 18.20 | 236,561 |
| 2012-02-17 | MPWR | Sale | 1,012 | 18.52 | 18,742 |
| 2011-08-30 | MPWR | Sale | 10,000 | 12.54 | 125,360 |
| 2011-08-29 | MPWR | Sale | 5,000 | 12.56 | 62,800 |
| 2011-08-23 | MPWR | Sale | 5,000 | 12.17 | 60,830 |
| 2011-08-17 | MPWR | Sale | 1,145 | 12.50 | 14,314 |
| 2011-08-11 | MPWR | Sale | 5,000 | 12.53 | 62,660 |
| 2011-05-31 | MPWR | Sale | 18,518 | 17.26 | 319,565 |
| 2011-05-27 | MPWR | Sale | 20,000 | 16.90 | 338,080 |
| 2011-05-06 | MPWR | Sale | 7,500 | 16.53 | 123,952 |
| 2011-05-19 | MPWR | Sale | 14,456 | 16.76 | 242,268 |
| 2011-05-18 | MPWR | Sale | 12,500 | 16.65 | 208,150 |
| 2011-05-13 | MPWR | Sale | 32,500 | 16.83 | 547,105 |
| 2011-05-12 | MPWR | Sale | 15,000 | 16.56 | 248,399 |
| 2011-05-03 | MPWR | Sale | 15,200 | 16.70 | 253,915 |
| 2010-11-30 | MPWR | Sale | 10,000 | 16.18 | 161,770 |
| 2010-11-29 | MPWR | Sale | 10,000 | 16.51 | 165,130 |
| 2010-11-19 | MPWR | Sale | 20,000 | 16.05 | 321,000 |
| 2010-03-02 | MPWR | Option Ex | 80,000 | .08 | 6,400 |
| 2009-08-28 | MPWR | Sale | 5,000 | 23.00 | 115,000 |
| 2009-08-26 | MPWR | Sale | 19,713 | 23.30 | 459,312 |
| 2009-08-25 | MPWR | Sale | 16,172 | 23.15 | 374,333 |
| 2009-08-24 | MPWR | Sale | 71,015 | 23.44 | 1,664,449 |
| 2009-08-21 | MPWR | Sale | 30,000 | 23.25 | 697,560 |
| 2009-08-20 | MPWR | Sale | 13,100 | 23.50 | 307,850 |
| 2009-08-19 | MPWR | Sale | 10,000 | 23.25 | 232,500 |
| 2009-08-14 | MPWR | Sale | 5,000 | 23.00 | 115,000 |
| 2008-08-18 | MPWR | Sale | 11,626 | 25.11 | 291,893 |
| 2008-08-15 | MPWR | Sale | 9,590 | 25.52 | 244,765 |
| 2008-08-14 | MPWR | Sale | 20,000 | 26.57 | 531,440 |
| 2008-08-13 | MPWR | Sale | 2,183 | 27.65 | 60,359 |
| 2008-08-12 | MPWR | Sale | 146,601 | 28.14 | 4,125,498 |
| 2008-08-06 | MPWR | Sale | 50,000 | 25.43 | 1,271,650 |
| 2008-08-08 | MPWR | Sale | 11,972 | 26.14 | 313,007 |
| 2008-08-11 | MPWR | Sale | 278,028 | 27.67 | 7,691,922 |
| 2008-08-07 | MPWR | Sale | 60,000 | 25.76 | 1,545,600 |
| 2008-08-07 | MPWR | Sale | 60,000 | 25.76 | 1,545,600 |
| 2008-08-06 | MPWR | Sale | 100,000 | 25.43 | 2,543,300 |
| 2008-08-05 | MPWR | Sale | 200,000 | 25.05 | 5,010,800 |
| 2008-05-21 | MPWR | Sale | 26,077 | 24.60 | 641,494 |
| 2008-05-19 | MPWR | Sale | 24,000 | 25.25 | 606,000 |
| 2008-05-15 | MPWR | Sale | 48,000 | 25.08 | 1,203,840 |
| 2008-05-16 | MPWR | Sale | 51,923 | 25.06 | 1,301,190 |
| 2007-08-31 | MPWR | Sale | 103,562 | 20.47 | 2,119,707 |
| 2007-08-30 | MPWR | Sale | 98,450 | 20.30 | 1,999,027 |
| 2007-08-29 | MPWR | Sale | 135,000 | 20.19 | 2,725,515 |
| 2007-08-28 | MPWR | Sale | 90,000 | 20.05 | 1,804,589 |
| 2007-08-27 | MPWR | Sale | 82,500 | 20.07 | 1,655,692 |
| 2007-08-24 | MPWR | Sale | 53,500 | 19.97 | 1,068,288 |
| 2007-08-22 | MPWR | Sale | 45,000 | 19.89 | 895,050 |
| 2007-08-23 | MPWR | Sale | 14,826 | 19.82 | 293,821 |
| 2007-05-31 | MPWR | Sale | 16,044 | 16.86 | 270,517 |
| 2007-05-30 | MPWR | Sale | 28,000 | 16.83 | 471,184 |
| 2007-05-29 | MPWR | Sale | 6,145 | 17.31 | 106,351 |
| 2007-05-23 | MPWR | Sale | 12,100 | 17.71 | 214,242 |
| 2007-05-21 | MPWR | Sale | 9,000 | 17.63 | 158,634 |
| 2007-05-22 | MPWR | Sale | 10,566 | 17.68 | 186,754 |
| 2007-05-17 | MPWR | Sale | 9,000 | 17.25 | 155,268 |
| 2007-05-18 | MPWR | Sale | 40,100 | 17.77 | 712,456 |
| 2005-08-26 | MPWR | Sale | 30,386 | 7.01 | 213,127 |
| 2005-08-26 | MPWR | Sale | 30,386 | 6.99 | 212,367 |
Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Chang Kuo Wei Herbert (Officer of Monolithic Power Systems Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.