Through the 90-day period concluding December 12, 2025, Monolithic Power Systems's top three insider stakeholders include CEO Michael Hsing (918.67K shares), EVP And Global Operations Deming Xiao (205.97K shares), EVP And Ww Sales & Marketing Maurice Sciammas (193.79K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Michael Hsing | CEO | 906,332 | 11 Dec, 2025 |
| Deming Xiao | EVP And Global Operations | 205,973 | 31 Oct, 2025 |
| Maurice Sciammas | EVP And Ww Sales & Marketing | 193,790 | 25 Nov, 2025 |
| Saria Tseng | EVP & General Counsel | 167,331 | 28 Nov, 2025 |
| Theodore Blegen | EVP And Cfo | 76,663 | 02 Dec, 2025 |
| Victor K Lee | 29,567 | 06 Feb, 2025 | |
| Eugen J Elmiger | 17,213 | 02 Sep, 2025 | |
| Jeff Zhou | 5,611 | 28 Aug, 2025 | |
| Eileen Wynne | 1,153 | 06 Feb, 2025 | |
| Carintia Martinez | 878 | 23 Sep, 2025 | |
| Kuo Wei Herbert Chang | 426 | 25 Nov, 2025 | |
| James C Moyer | 348 | 08 Feb, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 09 Dec, 2025 | Michael Hsing | Common Stock | D | 12,337 | $0.00 | 906,332 | D | G |
| 01 Dec, 2025 | Theodore Blegen | Common Stock | D | 40 | $899.73 | 74,292 | D | S |
| 01 Dec, 2025 | Theodore Blegen | Common Stock | D | 40 | $900.88 | 74,252 | D | S |
| 01 Dec, 2025 | Theodore Blegen | Common Stock | D | 80 | $901.88 | 74,172 | D | S |
| 01 Dec, 2025 | Theodore Blegen | Common Stock | D | 40 | $902.31 | 74,132 | D | S |
| 01 Dec, 2025 | Theodore Blegen | Common Stock | D | 120 | $904.38 | 74,012 | D | S |
| 01 Dec, 2025 | Theodore Blegen | Common Stock | D | 80 | $906.84 | 73,932 | D | S |
| 01 Dec, 2025 | Theodore Blegen | Common Stock | D | 80 | $907.59 | 73,852 | D | S |
| 01 Dec, 2025 | Theodore Blegen | Common Stock | D | 480 | $908.69 | 73,372 | D | S |
| 01 Dec, 2025 | Theodore Blegen | Common Stock | D | 1,984 | $909.00 | 71,388 | D | S |
| 01 Dec, 2025 | Theodore Blegen | Common Stock | D | 56 | $911.59 | 71,332 | D | S |
| 26 Nov, 2025 | Saria Tseng | Common Stock | D | 240 | $922.78 | 187,091 | D | S |
| 26 Nov, 2025 | Saria Tseng | Common Stock | D | 1,200 | $923.54 | 185,891 | D | S |
| 26 Nov, 2025 | Saria Tseng | Common Stock | D | 1,327 | $924.32 | 184,564 | D | S |
| 26 Nov, 2025 | Saria Tseng | Common Stock | D | 1,126 | $925.55 | 183,438 | D | S |
| 26 Nov, 2025 | Saria Tseng | Common Stock | D | 10,360 | $926.02 | 173,078 | D | S |
| 26 Nov, 2025 | Saria Tseng | Common Stock | D | 1,845 | $927.41 | 171,233 | D | S |
| 26 Nov, 2025 | Saria Tseng | Common Stock | D | 984 | $928.60 | 170,249 | D | S |
| 26 Nov, 2025 | Saria Tseng | Common Stock | D | 2,238 | $929.29 | 168,011 | D | S |
| 26 Nov, 2025 | Saria Tseng | Common Stock | D | 680 | $930.48 | 167,331 | D | S |