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Free accountM-tron Industries, Inc. (MPTI) has 1 SEC Form 4 insider filings on record in the last 90 days. No insider purchases were filed — 1 sales totalling $104K. Most recent filing: Aug. 19, 2026.
Open-market value, last 90 days
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Aug 19, 2026 SEC filing | Biles Linda M Executive VP - Finance | Sold | $103,591 | — |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.