Insider trade

CFO sold ~$6.3K of MPWR shares in the open market

Traded May 18, 2026 · Filed May 20, 2026

~$6.3K
Reported value · 4 sh @ $1,563.28: 5,900
Holds after · shares reported: -8.4%
stock since the trade · S&P 500 +3.4%, $1,486.33 → $1,360.97 on Oct 1

Why it stands out

The money chief of Monolithic Power Systems sold $6.3K of Monolithic Power Systems shares. It happened by itself, for taxes or pay.

Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell

View the official recordSEC Form 4 — Statement of Changes in Beneficial Ownership

All the details

Dates, kept separate

Transaction date: May 18, 2026
Reporting period: Not applicable
Filed with the SEC: May 20, 2026

CFO<$25KPre-arranged plan referenced

Context

Classification

open market sale

Code S — open-market or private sale

Absolute commitment

~$6,253

Shares × reported transaction price

Timing vs results

18 days after results of Apr 30, 2026, 73 days before results of Jul 30, 2026

Results dates are the company's own 8-K (Item 2.02). Many companies only let insiders trade in a window after results

Price at the time

Closed at $1,486.33 on May 18, 2026, 125% above its 52-week low and 11% below its high, after a 26% rise over the previous 30 trading days

52-week range $661.90 (May 30, 2025) to $1,661.10 (May 11, 2026), 83% of the way up, from 251 adjusted closes. 30 trading days earlier: $1,180.03 on Apr 6, 2026. Describes the past only, not a forecast

Planned / mechanical clue

Footnote references tax withholding

Only flagged when a footnote says so; never inferred

Securities lawsuit open at the trade date

A securities lawsuit naming the company as a defendant was filed on Feb 4, 2025 in the U.S. District Court, W.D. Washington. A filing is an allegation, not a finding.

Waterford Township General Employees Retirement System v. Monolithic Power Systems Inc, docket 2:25-cv-00220, via CourtListener (court records). Nature of suit 850, company named as first defendant