Shafer Matthew T
Insider transactions at 2 companies
This page shows all SEC Form 4 filings attributed to Shafer Matthew T. Form 4 disclosures are required whenever a corporate insider — director, officer, or 10%+ shareholder — buys, sells, or receives company stock. Each row represents a separate reported transaction. All data is sourced directly from the SEC EDGAR public database.
| Company | Title | Type | Shares | Price | Value | Date |
|---|---|---|---|---|---|---|
| CDIX | Chief Financial Officer | Award / Grant | 25,000 | — | — | Nov 19, 2025 |
| OPTT | CFO and Treasurer | Tax Withholding | 208 | $2.33 | $485 | May 20, 2019 |
| OPTT | CFO and Treasurer | Tax Withholding | 1,770 | $0.46 | $814 | Sep 17, 2018 |
| OPTT | CFO and Treasurer | Tax Withholding | 1,683 | $1.30 | $2,188 | Sep 17, 2017 |
| OPTT | CFO and Treasurer | Award / Grant | 14,584 | $1.40 | $20,418 | May 19, 2017 |
| OPTT | CFO and Treasurer | Award / Grant | 15,462 | $3.22 | $49,788 | Oct 21, 2016 |