Insider trade

Director sold ~$87K of MPWR shares in the open market

Traded Nov 21, 2025 · Filed Nov 24, 2025

~$87K
Reported value · 100 sh @ $873.97: 526
Holds after · shares reported: +56.0%
stock since the trade · S&P 500 +15.9%, $872.35 → $1,360.97 on Oct 1

Why it stands out

A board member of Monolithic Power Systems sold $87K of Monolithic Power Systems shares. Nobody planned it ahead of time.

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: Nov 21, 2025
Reporting period: Not applicable
Filed with the SEC: Nov 24, 2025

Director$25K–$100K

Context

Classification

open market sale

Code S — open-market or private sale

Absolute commitment

~$87,397

Shares × reported transaction price

Timing vs results

22 days after results of Oct 30, 2025, 76 days before results of Feb 5, 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 $872.35 on Nov 21, 2025, 92% above its 52-week low and 21% below its high, after a 4% drop over the previous 30 trading days

52-week range $455.19 (Apr 8, 2025) to $1,105.05 (Oct 27, 2025), 64% of the way up, from 250 adjusted closes. 30 trading days earlier: $904.44 on Oct 10, 2025. Describes the past only, not a forecast

Planned / mechanical clue

None found in footnotes

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