As of September 29, 2026, Phio Pharmaceuticals's top three insider holders are Robert J Bitterman (Chairman, Pres. Ceo, 364.87K shares), Lisa Cabott Carson (Chief Financial Officer, 81.11K shares), Patricia A Bradford (Director, 64.15K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Robert J Bitterman | Chairman, Pres. Ceo | 392,020 | 0 | 392,020 | 52.8% | 23 Sep, 2026 |
| 2 | Lisa Cabott Carson | Chief Financial Officer | 81,112 | 0 | 81,112 | 10.9% | 15 Sep, 2026 |
| 3 | Patricia A Bradford | Director | 72,151 | 0 | 72,151 | 9.7% | 25 Sep, 2026 |
| 4 | Robert L Ferrara | Director | 54,332 | 0 | 54,332 | 7.3% | 15 Sep, 2025 |
| 5 | David H Deming | Director | 37,800 | 0 | 37,800 | 5.1% | 06 Feb, 2026 |
| 6 | Curtis Lockshin | Director | 37,155 | 0 | 37,155 | 5.0% | 06 Feb, 2026 |
| 7 | Jonathan E Freeman | Director | 33,655 | 0 | 33,655 | 4.5% | 06 Feb, 2026 |
| 8 | Robert M. Infarinato | Vp, Cfo | 19,000 | 0 | 19,000 | 2.6% | 13 Sep, 2024 |
| 9 | Ronald Todd Plott | Director | 15,000 | 0 | 15,000 | 2.0% | 20 Aug, 2026 |
| 10 | Gerrit Dispersyn | President Ceo | 0 | 0 | 0 | 0.0% | 03 Mar, 2022 |
| 11 | H. Paul Dorman | Director | 0 | 0 | 0 | 0.0% | 16 Feb, 2022 |
| 12 | Caitlin Kontulis | Secretary Vp Finance Admin | 0 | 0 | 0 | 0.0% | 05 Mar, 2024 |
| 13 | Geert Cauwenbergh | Chief Executive Officer | 0 | 0 | 0 | 0.0% | 22 Feb, 2023 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 24 Sep, 2026 | Patricia A Bradford | Director | Acquired P | 6,500 | $1.01 | $6.58K | 64,151 | Direct |
| 22 Sep, 2026 | Robert J Bitterman | Chairman, Pres. Ceo | Acquired P | 2,000 | $1.03 | $2.06K | 364,871 | Direct |
| 19 Aug, 2026 | Ronald Todd Plott | Director | Acquired P | 15,000 | $1.14 | $17.10K | 15,000 | Direct |
| 18 Aug, 2026 | Robert J Bitterman | Chairman, Pres. Ceo | Acquired P | 10,000 | $1.06 | $10.60K | 431,421 | Direct |
| 26 Jun, 2026 | Robert J Bitterman | Chairman, Pres. Ceo | Acquired P | 10,000 | $0.99 | $9.90K | 421,421 | Direct |
| 05 Feb, 2026 | David H Deming | Director | Acquired A | 23,800 | $0.00 | $0 | 37,800 | Direct |
| 05 Feb, 2026 | Curtis Lockshin | Director | Acquired A | 16,600 | $0.00 | $0 | 35,155 | Direct |
| 05 Feb, 2026 | Robert J Bitterman | Chairman, Pres. Ceo | Acquired A | 120,000 | $0.00 | $0 | 411,421 | Direct |
| 05 Feb, 2026 | Lisa Cabott Carson | Chief Financial Officer | Acquired A | 47,000 | $0.00 | $0 | 94,000 | Direct |
| 05 Feb, 2026 | Patricia A Bradford | Director | Acquired A | 18,500 | $0.00 | $0 | 45,651 | Direct |
| 05 Feb, 2026 | Jonathan E Freeman | Director | Acquired A | 16,600 | $0.00 | $0 | 32,655 | Direct |
| 31 Dec, 2025 | Robert J Bitterman | Chairman, Pres. Ceo | Acquired P | 5,000 | $1.03 | $5.15K | 291,421 | Direct |
| 23 Dec, 2025 | Robert J Bitterman | Chairman, Pres. Ceo | Acquired P | 5,000 | $1.02 | $5.10K | 286,421 | Direct |
| 21 Nov, 2025 | Robert J Bitterman | Chairman, Pres. Ceo | Acquired P | 5,000 | $1.14 | $5.70K | 281,421 | Direct |
| 18 Nov, 2025 | Robert J Bitterman | Chairman, Pres. Ceo | Acquired P | 5,000 | $1.27 | $6.35K | 276,421 | Direct |
| 11 Sep, 2025 | Robert J Bitterman | Chairman, Pres. Ceo | Disposed F | 4,111 | $2.32 | $9.54K | 21,421 | Direct |
| 11 Sep, 2025 | Robert L Ferrara | Director | Acquired A | 23,100 | $0.00 | $0 | 38,766 | Direct |
| 11 Sep, 2025 | Jonathan E Freeman | Director | Acquired A | 14,700 | $0.00 | $0 | 16,055 | Direct |
| 11 Sep, 2025 | David H Deming | Director | Acquired A | 14,000 | $0.00 | $0 | 14,000 | Direct |
| 11 Sep, 2025 | Curtis Lockshin | Director | Acquired A | 16,200 | $0.00 | $0 | 18,555 | Direct |