Kuo Wei Herbert Chang

CIK: 0001192171

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)7 (77.8%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)2 (22.2%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

MPWR

MONOLITHIC POWER SYSTEMS, INC.

Director

Discretionary Trading P&L

Holdings

Transaction History (9 total)

MPWR
MONOLITHIC POWER SYSTEMS, INC.
Aug 24, 2026
Sale(S)
Direct
50 shares at avg. $1281.57$64K
MPWR
MONOLITHIC POWER SYSTEMS, INC.
Aug 11, 2026
Sale(S)
Direct
50 shares at avg. $1420.00$71K
MPWR
MONOLITHIC POWER SYSTEMS INC
Feb 3, 2026
Award(A)
Direct
189 shares-
MPWR
MONOLITHIC POWER SYSTEMS INC
Nov 25, 2025
Sale(S)
Direct
100 shares at avg. $896.97$90K
MPWR
MONOLITHIC POWER SYSTEMS INC
Nov 21, 2025
Sale(S)
Direct
100 shares at avg. $873.97$87K
MPWR
MONOLITHIC POWER SYSTEMS INC
May 13, 2025
Sale(S)
Direct
50 shares at avg. $738.00$37K
MPWR
MONOLITHIC POWER SYSTEMS INC
May 12, 2025
Sale(S)
Direct
100 shares at avg. $698.00$70K
MPWR
MONOLITHIC POWER SYSTEMS INC
May 8, 2025
Sale(S)
Direct
100 shares at avg. $650.00$65K
MPWR
MONOLITHIC POWER SYSTEMS INC
Feb 4, 2025
Award(A)
Direct
335 shares-

		Type	Shares	Price		Ownership
Aug 24, 2026	MPWR MONOLITHIC POWER SYSTEMS, INC.	Sale(S)	50	$1281.57	$64,079	Direct
Aug 11, 2026	MPWR MONOLITHIC POWER SYSTEMS, INC.	Sale(S)	50	$1420.00	$71,000	Direct
Feb 3, 2026	MPWR MONOLITHIC POWER SYSTEMS INC	Award(A)	189	-	$0	Direct
Nov 25, 2025	MPWR MONOLITHIC POWER SYSTEMS INC	Sale(S)	100	$896.97	$89,697	Direct
Nov 21, 2025	MPWR MONOLITHIC POWER SYSTEMS INC	Sale(S)	100	$873.97	$87,397	Direct
May 13, 2025	MPWR MONOLITHIC POWER SYSTEMS INC	Sale(S)	50	$738.00	$36,900	Direct
May 12, 2025	MPWR MONOLITHIC POWER SYSTEMS INC	Sale(S)	100	$698.00	$69,800	Direct
May 8, 2025	MPWR MONOLITHIC POWER SYSTEMS INC	Sale(S)	100	$650.00	$65,000	Direct
Feb 4, 2025	MPWR MONOLITHIC POWER SYSTEMS INC	Award(A)	335	-	-	Direct

1-9 of 9 transactions

About CHANG KUO WEI HERBERT

CHANG KUO WEI HERBERT (SEC CIK 0001192171) files insider reports with the SEC as Director of MONOLITHIC POWER SYSTEMS, INC. (MPWR).

Signal8 holds 9 ownership filings by CHANG KUO WEI HERBERT, all Form 4s, filed between Feb 6, 2025 and Aug 25, 2026. Those filings report 9 transactions, from Feb 4, 2025 to Aug 24, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on CHANG KUO WEI HERBERT's filings is in WEST PALM BEACH, FL.

Recent filings by CHANG KUO WEI HERBERT

Aug 24, 2026: Open-market sale of MPWR shares (Form 4, code S).
Aug 11, 2026: Open-market sale of MPWR shares (Form 4, code S).
Feb 3, 2026: Grant or award of MPWR shares (Form 4, code A).
Nov 25, 2025: Open-market sale of MPWR shares (Form 4, code S).
Nov 21, 2025: Open-market sale of MPWR shares (Form 4, code S).

Other insiders filing for MONOLITHIC POWER SYSTEMS, INC. (MPWR)

Balow Frank Anthony III, Chief Financial Officer
Tseng Saria, EVP & General Counsel
DEAN ROBERT W II, Interim CFO
Sciammas Maurice, EVP, WW Sales & Marketing
Zhou Jeff, Director
Hsing Michael, CEO

How to read Form 4 transaction codes