O'BRIEN THOMAS M has filed 7 insider transactions across 1 company since May 2023.
Most recent transaction: a option exercise of 625 shares of VirnetX Holding Corp ($VHC) on December 03, 2025.
Activity breakdown: 1 open-market purchase and 0 sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 3, 2025 | VirnetX Holding Corp | $VHC | O'BRIEN THOMAS M | Not found | M | Stock Option (Right to Buy) | 625 | $0.00 | 0.0000 | 4,238,581 | 100.00% | 0.01% |
| Dec. 3, 2025 | VirnetX Holding Corp | $VHC | O'BRIEN THOMAS M | Not found | M | Common Stock | 625 | $10.10 | 27,957.0000 | 4,238,581 | 2.29% | 0.01% |
| June 12, 2025 | VirnetX Holding Corp | $VHC | O'BRIEN THOMAS M | Not found | A | Common Stock | 7500 | $0.00 | 27,332.0000 | 4,238,581 | 37.82% | 0.18% |
| June 16, 2024 | VirnetX Holding Corp | $VHC | O'BRIEN THOMAS M | Not found | A | Common Stock | 7500 | $0.00 | 19,832.0000 | 0 | 60.82% | 0.00% |
| June 15, 2023 | VirnetX Holding Corp | $VHC | O'BRIEN THOMAS M | Director | A | Stock Option (Right to Buy) | 12500 | $0.00 | 12,500.0000 | 0 | 9999.99% | 0.00% |
| June 15, 2023 | VirnetX Holding Corp | $VHC | O'BRIEN THOMAS M | Director | A | Common Stock | 8333 | $0.00 | 246,660.0000 | 0 | 3.50% | 0.00% |
| May 18, 2023 | VirnetX Holding Corp | $VHC | O'BRIEN THOMAS M | Director | P | Common Stock | 50000 | $0.42 | 238,327.0000 | 0 | 26.55% | 0.00% |