This is a standard initial ownership disclosure for a new officer. No trading or material change in ownership occurred. Monitor future Form 4 filings for any open-market purchases or sales by the CFO.
How the stock moved after the report
⚠ Clustered NEUTRAL VIEWSTOCK ABOVE ENTRY AT T+1- T+0 · Oct 29 $1,211.63entry
- T+1 · 6d ago +2.67%α +3.15% · $1,243.95
- T+5 · due 11h ago Pending
- T+5 · todayOpen
- T+20 · in 22d Pending
- T+60 · in 3mo Pending
Price Chart
REPLAYWatch the reaction play outHow similar events traded
Executive Summary
Frank Anthony Balow III, the newly appointed Chief Financial Officer of Monolithic Power Systems, filed a Form 3 initial statement of beneficial ownership, reporting 2,941 shares of common stock held directly, including 1,206 unvested restricted stock units. This is a routine insider filing triggered by his appointment and contains no trading activity or material financial information.
Key Facts
- Frank Anthony Balow III filed Form 3 as a new reporting person (Chief Financial Officer) of Monolithic Power Systems.
- Balow directly owns 2,941 shares of MPWR common stock, including 1,206 unvested restricted stock units.
- The restricted stock units vest in tranches from November 2026 through February 2030, subject to continued employment.
- The filing is dated as of October 27, 2026, and was filed with the SEC on October 29, 2026.
Financial Impact
No financial impact; the filing reports existing beneficial ownership with no transaction.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 3 Filing (Primary) | 0001214659-26-013445 |
| Document: 0001214659-26-013445-index.html | 0001214659-26-013445 |
| Document: 0001214659-26-013445.txt | 0001214659-26-013445 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Nov 5, 2026 today | SC 13G/A | $1,159.84 | awaiting T+20 | awaiting T+20 | $1,131.43 (−2.45%) |
Nov 5, 2026 today | Institutional Cluster | $1,151.22 | awaiting T+20 | awaiting T+20 | $1,131.43 (−1.72%) |
Oct 29, 2026 7d ago | 3 | $1,211.63 | awaiting T+20 | awaiting T+20 | $1,131.43 (−6.62%) |
Oct 29, 2026 7d ago | 8-K | $1,211.63 | awaiting T+20 | awaiting T+20 | $1,131.43 (−6.62%) |
Sep 10, 2026 8w ago | Press Release | $1,234.46 $1,386.29 | ▲ +12.30% | ▲ +10.43% | $1,131.43 (−8.35%) |
Aug 26, 2026 10w ago | Insider Cluster | $1,311.08 $1,335.55 | ▲ +1.87% | ▲ +2.37% | $1,131.43 (−13.70%) |
Aug 26, 2026 10w ago | Insider Cluster | $1,311.08 $1,363.11 | ▲ +3.97% | ▲ +4.07% | $1,131.43 (−13.70%) |
Aug 24, 2026 10w ago | Court Ruling | $1,304.15 $1,355.47 | ▲ +3.94% | ▲ +3.69% | $1,131.43 (−13.24%) |
Aug 13, 2026 12w ago | Insider Cluster | $1,402.01 $1,143.24 | ▼ −18.46% | ▼ −16.47% | $1,131.43 (−19.30%) |
Aug 6, 2026 13w ago | Insider Cluster | $1,401.54 $1,223.86 | ▼ −12.68% | ▼ −12.28% | $1,131.43 (−19.27%) |
US Market Status
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