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KUO WEI HERBERT CHANG

CIK 1192171 · last filed 2026-08-25

KUO WEI HERBERT CHANG is a corporate insider who has filed 130 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing shows the insider sold $64.1K of MPWR on Aug 25, 2026. Across all open-market trades the lifetime net is −$63.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $10.0M across reported positions. 2 SEC filings were submitted jointly with KENNETH TAI.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$10.02M

Companies

3

Total Filings

130

Lifetime Open-Market Net

-$62.98M

Filer Profile

Reported Address
C/O MONOLITHIC POWER SYSTEMS INC.
79 GREAT OAKS BLVD
SAN JOSE, CA 95119
Related Filers
KENNETH TAI — 2 joint filings, latest 2004-11-24
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
MPWR Director 515 $1223.86 $630.3K -$135.1K 2 2026-08-25
MPWRE Director 615 — — -$60.30M 113 2026-02-05
MRVL Director 42,000 $223.55 $9.39M -$2.55M 7 2011-03-30

Recent Filings

130 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-08-25 MPWR Sell (S) −50 -$64.1K EDGAR
2026-08-13 MPWR Sell (S) −50 -$71.0K EDGAR
2026-08-11 MPWR Notice (144) −100 -$142.0K EDGAR
2026-02-05 MPWRE Grant (A) +189 $0 EDGAR
2025-11-25 MPWRE Sell (S) −100 -$89.7K EDGAR
2025-11-24 MPWRE Sell (S) −100 -$87.4K EDGAR
2025-11-21 MPWR Notice (144) −200 -$169.2K EDGAR
2025-05-13 MPWRE Sell (S) −50 -$36.9K EDGAR
2025-05-12 MPWRE Sell (S) −100 -$69.8K EDGAR
2025-05-09 MPWRE Sell (S) −100 -$65.0K EDGAR
Showing 1–10 of 130
Page 1 of 13
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.