4Filing Date: Feb 10, 2026
Monolithic Power Systems (MPWR)
Statement of Changes in Beneficial Ownership
View SEC Filing
ACC: 0001214659-26-001447
Total Value$64.32M
Trades2
Insiders1
Transaction Details
Hsing Michael
CEO, Director·Direct
Sell · Dispose
Common Stock
Shares-54.92K
Price$1171.16
Total Value$64.32M
Shares Owned After988.23K
Transaction DateFeb 6, 2026
Footnotes ▸
The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan.
Hsing Michael
CEO, Director·Indirect · by M Hsing 04 Trust
Common Stock
Shares0
Price-
Total Value$0
Shares Owned After133.04K
Post-Transaction Holdings
Hsing Michael · CEO, Director
| Security | Shares | Change |
|---|---|---|
| Common Stock | 1.12M | -54.92K (-4.67%) |
Original SEC Filing Textexpand_more
=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-02-06
10b5-1 Pre-arranged Plan: No
--- Issuer ---
Name: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
--- Reporting Owner ---
Name: Hsing Michael
CIK: 0001308676
Role: Director, Officer (CEO)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock
Date: 2026-02-06 | Code: S (Open market sale)
Shares: -54,923 | Price: $1,171.16
Total Value: $64,323,823.90
Shares Owned After: 988,234 | Ownership: D (Direct)
Footnotes:
[F1] The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan.
--- Holdings ---
[Holding #1]
Security: Common Stock
Ownership: I (Indirect)
[Holding #2]
Security: Common Stock
Ownership: I (Indirect)
--- Footnotes (Complete Index) ---
F1: The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan.
--- Signature ---
/s/ /s/ Saria Tseng, attorney-in-fact for Mr. Michael R. Hsing (2026-02-10)