Traded Feb 10, 2026 · Filed Feb 12, 2026
The boss of Monolithic Power Systems sold $4.43M of Monolithic Power Systems shares. It was planned long ago, so it says very little.
Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell
open market sale
Code S — open-market or private sale
~$4,427,758
Shares × reported transaction price
5 days after results of Feb 5, 2026, 79 days before results of Apr 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
Closed at $1,142.02 on Feb 10, 2026, 151% above its 52-week low and 7% below its high, after a 21% rise over the previous 30 trading days
52-week range $455.19 (Apr 8, 2025) to $1,229.82 (Feb 6, 2026), 89% of the way up, from 251 adjusted closes. 30 trading days earlier: $946.32 on Dec 26, 2025. Describes the past only, not a forecast
Footnote references a pre-arranged trading plan (Rule 10b5-1)
Only flagged when a footnote says so; never inferred
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
| After | Stock | S&P 500 | Difference |
|---|---|---|---|
| 7 days | +2.8% | +1.1% | +1.7% |
| 30 days | −8.0% | −1.9% | −6.2% |
| 90 days | +37.8% | +9.7% | +28.0% |
| 180 days | +21.6% | +13.3% | +8.3% |
Past results only. Not a forecast.
Markwayne Mullin boughtRepublican, Senator, OKHeld by the filer's joint per the disclosure. Disclosed 26 days after the transaction; reported as an official range, not an exact amount.
CEO sold ~$14.7M of Monolithic Power Systems
Scheduled in advanceCEO sold ~$5.79M of Monolithic Power Systems
Scheduled in advance