MPWR Filing
4Filing Date: May 8, 2026
MONOLITHIC POWER SYSTEMS INC (MPWR) · Insider Trading (Form 4) SEC Filing
Statement of Changes in Beneficial Ownership
descriptionView SEC Filing
ACC: 0001214659-26-005811open_in_new
Total Value$530.2K
Trades1
Insiders1
Transaction Details
Wynne Eileen
Director·Direct
Sell · Dispose
Common Stock
Shares-335
Price$1582.68
Total Value$530.2K
Shares Owned After1.01K
Transaction DateMay 6, 2026
Post-Transaction Holdings
Wynne Eileen
| Security | Shares | Change |
|---|---|---|
| Common Stock | 1.01K | -335 (-24.96%) |
Original SEC Filing Textexpand_more
=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-05-06
10b5-1 Pre-arranged Plan: No
--- Issuer ---
Name: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
--- Reporting Owner ---
Name: Wynne Eileen
CIK: 0001575706
Role: Director
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock
Date: 2026-05-06 | Code: S (Open market sale)
Shares: -335 | Price: $1,582.68
Total Value: $530,197.80
Shares Owned After: 1,007 | Ownership: D (Direct)
--- Signature ---
/s/ /s/ Saria Tseng, attorney-in-fact for Ms. Eileen Wynne (2026-05-08)