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Insider ActivityMPWR
Hsing Michael, CEO at MONOLITHIC POWER SYSTEMS INC, sold $198K of MPWR
Updated Jun 21, 2026
Hsing Michael
CEO
MONOLITHIC POWER SYSTEMS INC ·
$MPWR
Transaction Details
| Insider | Hsing Michael |
|---|---|
| Title | CEO |
| Company | MONOLITHIC POWER SYSTEMS INC |
| Ticker | MPWR |
| Transaction Type | Sale |
| Transaction Date | 2026-05-18 |
| Shares Traded | 130 |
| Price Per Share | $1,521.43 |
| Total Value | $198K |
| Filed Date | 2026-05-20 |
| Accession Number | 0001214659-26-006625 |
Ownership Context
| Shares Owned After Transaction | 848,263 |
|---|---|
| Ownership Type | Direct |
SEC Filing
Accession: 0001214659-26-006625
Other Insider Trades — MPWR
| Insider | Title | Action | Value | Date |
|---|---|---|---|---|
| Sciammas Maurice | EVP, WW Sales & Marketing | sold | $46K | 2026-06-01 |
| Sciammas Maurice | EVP, WW Sales & Marketing | traded | — | 2026-05-29 |
| Tseng Saria | EVP & General Counsel | sold | $12.9M | 2026-05-27 |
| Zhou Jeff | Insider | sold | $816K | 2026-05-26 |
| DEAN ROBERT W II | Interim CFO | sold | $36K | 2026-05-26 |
| Tseng Saria | EVP & General Counsel | traded | — | 2026-05-22 |
| Tseng Saria | EVP & General Counsel | sold | $7.9M | 2026-05-22 |
| Hsing Michael | CEO | sold | $1.3M | 2026-05-18 |
| Hsing Michael | CEO | sold | $9.9M | 2026-05-18 |
| Hsing Michael | CEO | sold | $912K | 2026-05-18 |
Other Trades by Hsing Michael
| Ticker | Company | Action | Value | Date |
|---|---|---|---|---|
| MPWR | MONOLITHIC POWER SYSTEMS INC | sold | $5.0M | 2026-05-18 |
| MPWR | MONOLITHIC POWER SYSTEMS INC | sold | $8.5M | 2026-05-18 |
| MPWR | MONOLITHIC POWER SYSTEMS INC | sold | $7.4M | 2026-05-18 |
| MPWR | MONOLITHIC POWER SYSTEMS INC | sold | $6.0M | 2026-05-18 |
| MPWR | MONOLITHIC POWER SYSTEMS INC | sold | $8.5M | 2026-05-18 |
| MPWR | MONOLITHIC POWER SYSTEMS INC | sold | $9.9M | 2026-05-18 |
| MPWR | MONOLITHIC POWER SYSTEMS INC | sold | $1.3M | 2026-05-18 |
| MPWR | MONOLITHIC POWER SYSTEMS INC | sold | $912K | 2026-05-18 |
| MPWR | MONOLITHIC POWER SYSTEMS INC | sold | $4.4M | 2026-05-18 |
| MPWR | MONOLITHIC POWER SYSTEMS INC | sold | $5.7M | 2026-05-18 |
Full Ticker Profile
View all insider trades, dark pool activity, congressional filings, and the Whisper Score for MPWR — MONOLITHIC POWER SYSTEMS INC →
Whisper Score — MPWR
36.01
Murmurs
Current Whisper Score
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Data sourced from SEC Form 4 insider trading filings. Transaction details are as reported to the Securities and Exchange Commission. This page does not constitute financial advice. StonkWhisper presents public records — it does not verify or guarantee the accuracy of SEC filings.
Last updated: June 21, 2026 at 07:12 UTC