Xiao Deming — SEC Form 4 filings
SEC reporting owner CIK 1308647. 20 Form 4 filings on record with FilingPulse; latest filed 2026-05-08.
Transaction summary — filings shown
Covers all 20 filings on record, filed 2024-01-11 to 2026-05-08. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 27 legs across 14 filings — 133,250 shares, $139,993,143 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 10.
- Largest priced transaction: sale of 39,999 shares @ $780.00 ($31,199,220) in MONOLITHIC POWER SYSTEMS INC, filed 2025-08-04.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| MONOLITHIC POWER SYSTEMS INC (MPWR) | EVP, Global Operations | 20 | — | 27 legs · 133,250 sh · $139,993,143 | 10 |
Form 4 filings — Xiao Deming
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-05-08 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | 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 |
| 2026-02-10 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 22,875 @ $1,171.16 | EDGAR |
| 2026-02-05 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Grant/award (A): 57,170 @ $0 | EDGAR |
| 2025-10-31 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Tax withholding (F): 54,543 @ $1,096.63 | EDGAR |
| 2025-10-28 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Grant/award (A): 135,520 @ $0 | EDGAR |
| 2025-08-12 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Gift (G): 945 @ $0 · Gift (G): 945 @ $0 | EDGAR |
| 2025-08-04 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 39,999 @ $780 | EDGAR |
| 2025-02-12 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 662 @ $717.10 | EDGAR |
| 2024-11-13 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 866 @ $765.14 | EDGAR |
| 2024-08-29 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 9,259 @ $950 | EDGAR |
| 2024-08-22 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Gift (G): 8,968 @ $0 · Gift (G): 8,968 @ $0 · Sale (S): 10,000 @ $950 | EDGAR |
| 2024-08-21 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Gift (G): 30,291 @ $0 · Gift (G): 30,291 @ $0 | EDGAR |
| 2024-08-12 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 859 @ $778.39 | EDGAR |
| 2024-07-24 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 3,205 @ $831.58 | EDGAR |
| 2024-05-22 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 1,300 @ $769.40 | EDGAR |
| 2024-05-10 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Gift (G): 29 @ $0 | EDGAR |
| 2024-05-09 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 869 @ $690.02 | EDGAR |
| 2024-02-09 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 859 @ $680 | EDGAR |
| 2024-02-07 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 982 @ $641 | EDGAR |
| 2024-01-11 | 4 | MONOLITHIC POWER SYSTEMS INC (MPWR) | Sale (S): 500 @ $584.39 · Sale (S): 700 @ $586.21 · Sale (S): 1,079 @ $587.84 · Sale (S): 1,757 @ $588.44 · Sale (S): 2,387 @ $589.52 · Sale (S): 3,718 @ $590.37 · +5 more | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-10 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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