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 | — | Sale | 4,951 | $387.07 | $1,916,384 | 50,743 | Dec 12, 2022 |
| Sciammas Maurice | Sr. V.P.of Sales and Marketing | Sale | 5,200 | $369.27 | $1,920,204 | 198,384 | Nov 22, 2022 |
| Sciammas Maurice | Sr. V.P.of Sales and Marketing | Sale | 1,385 | $390.33 | $540,607 | 203,863 | Nov 15, 2022 |
| Tseng Saria | VP & General Counsel | Sale | 1,385 | $390.33 | $540,607 | 254,711 | Nov 15, 2022 |
| BLEGEN THEODORE | CFO | Sale | 1,196 | $390.33 | $466,835 | 123,878 | Nov 15, 2022 |
| Xiao Deming | Pres. of MPS Asia Operations | Sale | 2,377 | $408.68 | $971,432 | 270,428 | Nov 14, 2022 |
| Hsing Michael | CEO | Sale | 1,074 | $405.51 | $435,518 | 995,672 | Nov 14, 2022 |
| Sciammas Maurice | Sr. V.P.of Sales and Marketing | Sale | 4,000 | $355.74 | $1,422,960 | 205,248 | Nov 7, 2022 |
| Hsing Michael | CEO | Sale | 3,790 | $343.98 | $1,303,684 | 1,002,093 | Nov 4, 2022 |
| Tseng Saria | VP & General Counsel | Sale | 982 | $343.98 | $337,788 | 256,096 | Nov 4, 2022 |
| Xiao Deming | Pres. of MPS Asia Operations | Sale | 982 | $343.98 | $337,788 | 274,190 | Nov 4, 2022 |
| BLEGEN THEODORE | CFO | Sale | 847 | $343.98 | $291,351 | 125,074 | Nov 4, 2022 |
| Sciammas Maurice | Sr. V.P.of Sales and Marketing | Sale | 982 | $343.98 | $337,788 | 209,248 | Nov 4, 2022 |
| BLEGEN THEODORE | CFO | Sale | 905 | $372.60 | $337,203 | 125,921 | Oct 3, 2022 |
| Sciammas Maurice | Sr. V.P.of Sales and Marketing | Sale | 4,305 | $372.60 | $1,604,043 | 210,230 | Oct 3, 2022 |
| Moyer James C | — | Gift | 76,925 | — | — | 188,738 | Sep 22, 2022 |
| Xiao Deming | Pres. of MPS Asia Operations | Sale | 4,305 | $372.60 | $1,604,043 | 275,172 | Aug 15, 2022 |
| Hsing Michael | CEO | Sale | 10,960 | $372.60 | $4,083,696 | 1,005,883 | Aug 15, 2022 |
| Tseng Saria | VP & General Counsel | Sale | 4,305 | $372.60 | $1,604,043 | 257,078 | Aug 15, 2022 |
| BLEGEN THEODORE | CFO | Sale | 1,369 | $525.95 | $720,026 | 126,826 | Aug 12, 2022 |
| Hsing Michael | CEO | Sale | 6,306 | $525.95 | $3,316,641 | 1,016,824 | Aug 12, 2022 |
| Sciammas Maurice | Sr. V.P.of Sales and Marketing | Sale | 1,633 | $525.95 | $858,876 | 214,535 | Aug 12, 2022 |
| Tseng Saria | VP & General Counsel | Sale | 1,633 | $525.95 | $858,876 | 261,367 | Aug 12, 2022 |
| Xiao Deming | Pres. of MPS Asia Operations | Sale | 1,633 | $525.95 | $858,876 | 279,457 | Aug 12, 2022 |
| Zhou Jeff | — | Sale | 200 | $540.00 | $108,000 | 5,651 | Aug 11, 2022 |
| Xiao Deming | Pres. of MPS Asia Operations | Sale | 984 | $522.39 | $514,032 | 281,090 | Aug 4, 2022 |
| BLEGEN THEODORE | CFO | Sale | 848 | $522.38 | $442,978 | 128,195 | Aug 4, 2022 |
| Hsing Michael | CEO | Sale | 3,798 | $522.39 | $1,984,037 | 1,023,130 | Aug 4, 2022 |
| Tseng Saria | VP & General Counsel | Sale | 984 | $522.39 | $514,032 | 263,000 | Aug 4, 2022 |
| Sciammas Maurice | Sr. V.P.of Sales and Marketing | Sale | 257 | $532.06 | $136,739 | 216,168 | Aug 4, 2022 |
| Zhou Jeff | — | Sale | 200 | $520.00 | $104,000 | 5,851 | Aug 3, 2022 |
| Xiao Deming | Pres. of MPS Asia Operations | Sale | 4,515 | $361.58 | $1,632,534 | 282,074 | Jul 1, 2022 |
| Tseng Saria | VP & General Counsel | Sale | 4,515 | $361.58 | $1,632,534 | 263,984 | Jul 1, 2022 |
| Sciammas Maurice | Sr. V.P.of Sales and Marketing | Sale | 4,515 | $361.58 | $1,632,534 | 221,352 | Jul 1, 2022 |
| BLEGEN THEODORE | CFO | Sale | 950 | $361.58 | $343,501 | 129,043 | Jul 1, 2022 |
| Hsing Michael | CEO | Sale | 11,495 | $361.57 | $4,156,247 | 1,026,928 | Jul 1, 2022 |
| Xiao Deming | Pres. of MPS Asia Operations | Sale | 1,495 | $457.00 | $683,215 | 286,589 | May 27, 2022 |
| Xiao Deming | Pres. of MPS Asia Operations | Sale | 4,298 | $392.44 | $1,686,707 | 288,084 | May 24, 2022 |
| Xiao Deming | Pres. of MPS Asia Operations | Sale | 1,679 | $388.10 | $651,620 | 292,382 | May 12, 2022 |
| BLEGEN THEODORE | CFO | Sale | 1,395 | $388.10 | $541,400 | 129,993 | May 12, 2022 |
| Tseng Saria | VP & General Counsel | Sale | 1,679 | $388.10 | $651,620 | 268,499 | May 12, 2022 |
| Hsing Michael | CEO | Sale | 6,481 | $388.10 | $2,515,276 | 1,038,423 | May 12, 2022 |
| Sciammas Maurice | Sr. V.P.of Sales and Marketing | Sale | 1,679 | $388.10 | $651,620 | 225,867 | May 9, 2022 |
| Xiao Deming | Pres. of MPS Asia Operations | Sale | 986 | $453.16 | $446,816 | 294,061 | May 6, 2022 |
| BLEGEN THEODORE | CFO | Sale | 850 | $453.16 | $385,186 | 131,388 | May 4, 2022 |
| Tseng Saria | VP & General Counsel | Sale | 986 | $453.16 | $446,816 | 270,178 | May 4, 2022 |
| Hsing Michael | CEO | Sale | 3,807 | $453.15 | $1,725,142 | 1,044,904 | May 4, 2022 |
| Sciammas Maurice | Sr. V.P.of Sales and Marketing | Gift | 1,699 | — | — | 1,699 | Apr 1, 2022 |
| BLEGEN THEODORE | CFO | Sale | 930 | $467.22 | $434,515 | 132,238 | Apr 1, 2022 |
| Tseng Saria | VP & General Counsel | Sale | 4,420 | $467.23 | $2,065,157 | 271,164 | Apr 1, 2022 |