MPWR insider transaction filings
MONOLITHIC POWER SYSTEMS, INC. — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-08-19. Screen MPWR transaction legs live →
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-08-19 | 4 | DEAN ROBERT W II — Interim CFO | Sale (S): 6 @ $1,413.64 | EDGAR |
| 2026-08-13 | 4 | CHANG KUO WEI HERBERT — Director | Sale (S): 50 @ $1,420 | EDGAR |
| 2026-08-06 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Gift (G): 25,000 @ $0 · Gift (G): 25,000 @ $0 | EDGAR |
| 2026-08-06 | 4 | DEAN ROBERT W II — Interim CFO | Sale (S): 105 @ $1,344.27 | EDGAR |
| 2026-08-05 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 30 @ $1,343.94 | EDGAR |
| 2026-07-28 | 4 | DEAN ROBERT W II — Interim CFO | Grant/award (A): 1,359 @ $0 | EDGAR |
| 2026-07-17 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 527 @ $1,314.03 · Sale (S): 274 @ $1,318.42 · Sale (S): 409 @ $1,323.93 · Sale (S): 464 @ $1,329.30 · Sale (S): 776 @ $1,334.59 · Sale (S): 1,460 @ $1,339.59 · +12 more | EDGAR |
| 2026-07-06 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 30 @ $1,351.61 | EDGAR |
| 2026-06-03 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 30 @ $1,533.95 | EDGAR |
| 2026-06-02 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Gift (G): 12,472 @ $0 | EDGAR |
| 2026-05-29 | 4 | Tseng Saria — EVP & General Counsel | Sale (S): 7,565 @ $1,700 | EDGAR |
| 2026-05-28 | 4 | DEAN ROBERT W II — Interim CFO | Sale (S): 22 @ $1,649.56 | EDGAR |
| 2026-05-27 | 4 | Zhou Jeff — Director | Sale (S): 486 @ $1,680 | EDGAR |
| 2026-05-27 | 4 | Tseng Saria — EVP & General Counsel | Gift (G): 200 @ $0 · Sale (S): 5,000 @ $1,586.43 | EDGAR |
| 2026-05-20 | 4 | Hsing Michael — CEO, Director | Sale (S): 3,424 @ $1,462.61 · Sale (S): 5,819 @ $1,467.62 · Sale (S): 5,049 @ $1,472.84 · Sale (S): 4,082 @ $1,476.96 · Sale (S): 5,737 @ $1,482.51 · Sale (S): 6,688 @ $1,486.76 · +7 more | EDGAR |
| 2026-05-20 | 4 | DEAN ROBERT W II — Interim CFO | Sale (S): 4 @ $1,563.28 | EDGAR |
| 2026-05-19 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 3,741 @ $1,550.36 · Sale (S): 1,717 @ $1,557.48 · Sale (S): 2,010 @ $1,562.01 · Sale (S): 2,020 @ $1,567.15 · Sale (S): 1,312 @ $1,571.49 · Sale (S): 703 @ $1,577.75 · +2 more | EDGAR |
| 2026-05-15 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Gift (G): 1,563 @ $0 · Gift (G): 1,563 @ $0 | EDGAR |
| 2026-05-15 | 4 | DEAN ROBERT W II — Interim CFO | Other (J): 2,156 @ $0 | EDGAR |
| 2026-05-08 | 4 | Elmiger Eugen J — Director | Sale (S): 320 @ $1,559.88 · Sale (S): 814 @ $1,566.36 · Sale (S): 1,078 @ $1,571.58 · Sale (S): 834 @ $1,575.57 · Sale (S): 1,879 @ $1,581.81 · Sale (S): 2,587 @ $1,586.81 · +3 more | EDGAR |
| 2026-05-08 | 4 | Xiao Deming — EVP, Global Operations | Sale (S): 3,329 @ $1,648.38 · Sale (S): 14,167 @ $1,652.80 · Sale (S): 11,597 @ $1,657.93 · Sale (S): 907 @ $1,661.38 | EDGAR |
| 2026-05-08 | 4 | Wynne Eileen — Director | Sale (S): 335 @ $1,582.68 | EDGAR |
| 2026-05-06 | 4 | Zhou Jeff — Director | Sale (S): 514 @ $1,574.48 · Sale (S): 500 @ $1,600 · Sale (S): 500 @ $1,650 | EDGAR |
| 2026-05-06 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 380 @ $1,583.81 | EDGAR |
| 2026-05-06 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 30 @ $1,588.73 | EDGAR |
| 2026-04-10 | 4 | Tseng Saria — EVP & General Counsel | Sale (S): 560 @ $1,266.48 · Sale (S): 360 @ $1,270.29 · Sale (S): 240 @ $1,279.55 · Sale (S): 120 @ $1,287.12 · Sale (S): 400 @ $1,292.08 · Sale (S): 800 @ $1,302.52 · +4 more | EDGAR |
| 2026-04-08 | 4 | Tseng Saria — EVP & General Counsel | Sale (S): 244 @ $1,139.96 · Sale (S): 556 @ $1,144.42 · Sale (S): 480 @ $1,149.05 · Sale (S): 560 @ $1,159.62 · Sale (S): 684 @ $1,165.66 · Sale (S): 2,036 @ $1,170.38 · +2 more | EDGAR |
| 2026-04-03 | 4 | Tseng Saria — EVP & General Counsel | Sale (S): 576 @ $1,131.24 · Sale (S): 184 @ $1,132.15 · Sale (S): 160 @ $1,134.14 · Sale (S): 188 @ $1,135.91 · Sale (S): 292 @ $1,136.99 | EDGAR |
| 2026-04-03 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 30 @ $1,116.44 | EDGAR |
| 2026-04-01 | 4 | Tseng Saria — EVP & General Counsel | Sale (S): 5,154 @ $1,000.81 · Sale (S): 9,080 @ $1,005.18 · Sale (S): 3,360 @ $1,009.63 · Sale (S): 3,194 @ $1,017.22 · Sale (S): 2,200 @ $1,023 · Sale (S): 2,440 @ $1,029.21 · +2 more | EDGAR |
| 2026-03-24 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 30 @ $1,095.07 | EDGAR |
| 2026-02-17 | 4 | Hsing Michael — CEO, Director | Sale (S): 12,731 @ $1,155.71 · Sale (S): 4,992 @ $1,159.84 · Sale (S): 4,001 @ $1,164.92 · Sale (S): 2,076 @ $1,168.80 · Sale (S): 200 @ $1,173.39 · Sale (S): 480 @ $1,180.79 · +6 more | EDGAR |
| 2026-02-13 | 4 | Hsing Michael — CEO, Director | Sale (S): 363 @ $1,158.71 · Sale (S): 1,366 @ $1,163.71 · Sale (S): 1,533 @ $1,167.62 · Sale (S): 1,987 @ $1,172.92 · Sale (S): 2,799 @ $1,177.67 · Sale (S): 1,542 @ $1,182.82 · +4 more | EDGAR |
| 2026-02-12 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 200 @ $1,179.97 | EDGAR |
| 2026-02-12 | 4 | Hsing Michael — CEO, Director | Sale (S): 4,302 @ $1,132.01 · Sale (S): 6,325 @ $1,136.75 · Sale (S): 16,080 @ $1,141.88 · Sale (S): 3,864 @ $1,145.90 · Sale (S): 1,215 @ $1,151.11 · Sale (S): 694 @ $1,154.96 · +3 more | EDGAR |
| 2026-02-11 | 4 | Lee Victor K — Director | Sale (S): 400 @ $1,212.16 | EDGAR |
| 2026-02-10 | 4 | Xiao Deming — EVP, Global Operations | Sale (S): 22,875 @ $1,171.16 | EDGAR |
| 2026-02-10 | 4 | Tseng Saria — EVP & General Counsel | Sale (S): 22,875 @ $1,171.16 | EDGAR |
| 2026-02-10 | 4 | Sciammas Maurice — EVP, WW Sales & Marketing | Sale (S): 22,875 @ $1,171.16 | EDGAR |
| 2026-02-10 | 4 | BLEGEN THEODORE — EVP and CFO | Sale (S): 21,725 @ $1,171.16 | EDGAR |
| 2026-02-10 | 4 | Hsing Michael — CEO, Director | Sale (S): 54,923 @ $1,171.16 | EDGAR |
| 2026-02-05 | 4 | Wynne Eileen — Director | Grant/award (A): 189 @ $0 | EDGAR |
| 2026-02-05 | 4 | Zhou Jeff — Director | Grant/award (A): 189 @ $0 | EDGAR |
| 2026-02-05 | 4 | Elmiger Eugen J — Director | Grant/award (A): 189 @ $0 | EDGAR |
| 2026-02-05 | 4 | Lee Victor K — Director | Grant/award (A): 189 @ $0 | EDGAR |
| 2026-02-05 | 4 | Martinez Carintia — Director | Grant/award (A): 189 @ $0 | EDGAR |
| 2026-02-05 | 4 | Xiao Deming — EVP, Global Operations | Grant/award (A): 57,170 @ $0 | EDGAR |
| 2026-02-05 | 4 | BLEGEN THEODORE — EVP and CFO | Grant/award (A): 38,745 @ $0 | EDGAR |
| 2026-02-05 | 4 | Tseng Saria — EVP & General Counsel | Grant/award (A): 57,170 @ $0 | EDGAR |
| 2026-02-05 | 4 | Hsing Michael — CEO, Director | Grant/award (A): 136,825 @ $0 | EDGAR |
Recent 8-K events — MONOLITHIC POWER SYSTEMS, INC.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-07-30 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-06-12 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-04-30 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-27 | 8-K | 4.02 — Non-Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review | EDGAR |
| 2026-02-05 | 8-K | 2.02 — Results of Operations and Financial Condition 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-12-12 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-11-21 | 8-K | 5.03 — Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-10-30 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-09-11 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-07-31 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
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