MONOLITHIC POWER SYSTEMS INC — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Moyer James C | Chief IC Design Engineer | Sale | 200 | $20.70 | $4,140 | 321,444 | Sep 6, 2007 |
| Neely Rick | Chief Financial Officer | Sale | 2,900 | $20.83 | $60,407 | 9,500 | Sep 4, 2007 |
| PADVAL UMESH | — | Sale | 5,903 | $20.50 | $121,012 | — | Aug 31, 2007 |
| CHANG KUO WEI HERBERT | — | Sale | 103,562 | $20.47 | $2,119,914 | 1,351,852 | Aug 31, 2007 |
| CHANG KUO WEI HERBERT | — | Sale | 98,450 | $20.31 | $1,999,519 | 1,455,414 | Aug 30, 2007 |
| CHANG KUO WEI HERBERT | — | Sale | 135,000 | $20.19 | $2,725,650 | 1,553,864 | Aug 29, 2007 |
| Hsing Michael | CEO | Sale | 4,000 | $20.33 | $81,320 | 236,697 | Aug 29, 2007 |
| Moyer James C | Chief IC Design Engineer | Sale | 3,750 | $20.09 | $75,338 | 321,644 | Aug 28, 2007 |
| CHANG KUO WEI HERBERT | — | Sale | 90,000 | $20.05 | $1,804,500 | 1,688,864 | Aug 28, 2007 |
| CHANG KUO WEI HERBERT | — | Sale | 53,500 | $19.97 | $1,068,395 | 1,861,364 | Aug 27, 2007 |
| PADVAL UMESH | — | Sale | 8,000 | $19.98 | $159,840 | — | Aug 24, 2007 |
| CHANG KUO WEI HERBERT | — | Sale | 14,826 | $19.82 | $293,851 | 1,914,864 | Aug 22, 2007 |
| PADVAL UMESH | — | Option Exercise | 10,000 | $1.20 | $12,000 | 10,000 | Aug 20, 2007 |
| EARHART ALAN L | — | Option Exercise | 15,000 | $12.16 | $182,400 | 15,000 | Aug 20, 2007 |
| Sciammas Maurice | VP, Sales and Marketing | Sale | 30,000 | $18.96 | $568,800 | 17,854 | Aug 17, 2007 |
| Xiao Deming | VP, Operations | Option Exercise | 12,544 | $0.80 | $10,035 | 38,919 | Aug 17, 2007 |
| Hsing Michael | CEO | Sale | 4,000 | $18.80 | $75,200 | 248,697 | Aug 16, 2007 |
| Moyer James C | Chief IC Design Engineer | Sale | 500 | $18.80 | $9,400 | 325,394 | Aug 15, 2007 |
| Xiao Deming | VP, Operations | Sale | 14,000 | $18.52 | $259,280 | 26,375 | Aug 14, 2007 |
| Moyer James C | Chief IC Design Engineer | Sale | 100 | $18.36 | $1,836 | 325,894 | Aug 9, 2007 |
| Hsing Michael | CEO | Sale | 4,000 | $18.63 | $74,520 | 252,697 | Aug 7, 2007 |
| Hsing Michael | CEO | Sale | 4,000 | $18.60 | $74,400 | 256,697 | Aug 6, 2007 |
| Moyer James C | Chief IC Design Engineer | Award / Grant | 9,500 | — | — | 890,569 | Aug 3, 2007 |
| Sciammas Maurice | VP, Sales and Marketing | Award / Grant | 9,500 | — | — | 47,854 | Aug 3, 2007 |
| Chiocchi Adriana | Chief Legal Officer | Award / Grant | 11,500 | — | — | 11,500 | Aug 3, 2007 |
| Xiao Deming | VP, Operations | Award / Grant | 9,500 | — | — | 26,375 | Aug 3, 2007 |
| Neely Rick | Chief Financial Officer | Sale | 3,500 | $18.75 | $65,625 | — | Aug 3, 2007 |
| Moyer James C | Chief IC Design Engineer | Sale | 9,124 | $16.85 | $153,739 | 881,069 | May 31, 2007 |
| CHANG KUO WEI HERBERT | — | Sale | 16,044 | $16.86 | $270,502 | — | May 31, 2007 |
| Moyer James C | Chief IC Design Engineer | Sale | 25,719 | $16.86 | $433,622 | 874,986 | May 30, 2007 |
| PADVAL UMESH | — | Option Exercise | 14,500 | $7.51 | $108,895 | 14,500 | May 29, 2007 |
| Hsing Michael | CEO | Sale | 7,500 | $16.84 | $126,300 | 260,697 | May 24, 2007 |
| Sciammas Maurice | VP, Sales and Marketing | Sale | 500 | $16.97 | $8,485 | 219,482 | May 24, 2007 |
| CHANG KUO WEI HERBERT | — | Sale | 12,100 | $17.71 | $214,291 | 50,189 | May 23, 2007 |
| CHANG KUO WEI HERBERT | — | Other | 313,193 | — | — | — | May 23, 2007 |
| CHANG KUO WEI HERBERT | — | Sale | 9,000 | $17.63 | $158,670 | 72,855 | May 22, 2007 |
| CHANG KUO WEI HERBERT | — | Sale | 40,100 | $17.77 | $712,577 | 81,855 | May 17, 2007 |
| EARHART ALAN L | — | Option Exercise | 20,000 | $7.50 | $150,000 | 20,000 | May 17, 2007 |
| Hsing Michael | CEO | Sale | 5,000 | $13.80 | $69,000 | 280,697 | May 3, 2007 |
| Hsing Michael | CEO | Sale | 5,000 | $13.49 | $67,450 | 285,697 | Apr 24, 2007 |
| Hsing Michael | CEO | Sale | 5,000 | $12.99 | $64,950 | 298,197 | Apr 19, 2007 |
| Hsing Michael | CEO | Sale | 2,700 | $12.81 | $34,587 | 305,697 | Apr 12, 2007 |
| Hsing Michael | CEO | Sale | 2,500 | $12.87 | $32,175 | 313,397 | Apr 5, 2007 |
| Hsing Michael | CEO | Sale | 5,000 | $13.01 | $65,050 | 315,897 | Mar 27, 2007 |
| Hsing Michael | CEO | Sale | 5,000 | $13.29 | $66,450 | 325,897 | Mar 21, 2007 |
| Hsing Michael | CEO | Sale | 5,000 | $13.03 | $65,150 | 340,897 | Mar 16, 2007 |
| Hsing Michael | CEO | Other | 80,000 | — | — | 350,897 | Mar 1, 2007 |
| Hsing Michael | CEO | Option Exercise | 50,000 | $1.32 | $66,000 | 952,144 | Feb 28, 2007 |
| Xiao Deming | VP, Operations | Option Exercise | 11,666 | $1.20 | $13,999 | 28,541 | Feb 26, 2007 |
| Hsing Michael | CEO | Option Exercise | 70,000 | $1.32 | $92,400 | 892,144 | Feb 26, 2007 |