Transcode Therapeutics's three largest insider shareholders as of September 29, 2026 are Llc Defj, (TenPercentOwner, 14.13Mn shares), Robert Michael Dudley (Chief Executive Officer, 225 shares), Thomas A Fitzgerald (Chief Financial Officer, 70 shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Llc Defj, | TenPercentOwner | 14,134,481 | 0 | 14,134,481 | 100.0% | 05 Aug, 2026 |
| 2 | Robert Michael Dudley | Chief Executive Officer | 225 | 0 | 225 | 0.0% | 02 Oct, 2023 |
| 3 | Thomas A Fitzgerald | Chief Financial Officer | 70 | 0 | 70 | 0.0% | 02 Oct, 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 |
|---|---|---|---|---|---|---|---|---|
| 09 Sep, 2026 | Thomas A Fitzgerald | Chief Financial Officer | Acquired A | 185,000 | $0.00 | $0 | 185,000 | Direct |
| 03 Aug, 2026 | Llc Defj, | TenPercentOwner | Acquired C | 11,813,859 | — | — | 12,113,899 | Direct |
| 03 Aug, 2026 | Llc Defj, | TenPercentOwner | Acquired C | 2,020,582 | — | — | 14,134,481 | Direct |
| 03 Aug, 2026 | Llc Defj, | TenPercentOwner | Disposed C | 1,181 | $0.00 | $0 | 0 | Direct |
| 03 Aug, 2026 | Llc Defj, | TenPercentOwner | Disposed C | 202 | $0.00 | $0 | 0 | Direct |
| 14 Jun, 2024 | Thomas A Fitzgerald | Interim Ceo, Cfo | Acquired A | 650,000 | $0.00 | $0 | 25 | Direct |
| 14 Jun, 2024 | Magda Marquet | Director | Acquired A | 70,000 | $0.00 | $0 | 3 | Direct |
| 14 Jun, 2024 | Philippe Calais | Director | Acquired A | 70,000 | $0.00 | $0 | 3 | Direct |
| 14 Jun, 2024 | Erik Manting | Director | Acquired A | 70,000 | $0.00 | $0 | 3 | Direct |
| 28 Sep, 2023 | Robert Michael Dudley | Chief Executive Officer | Acquired P | 98,000 | $408.00 | $39.98Mn | 225 | Direct |
| 28 Sep, 2023 | Thomas A Fitzgerald | Chief Financial Officer | Acquired P | 49,350 | $408.00 | $20.13Mn | 70 | Direct |
| 20 Jun, 2023 | Robert Michael Dudley | Chief Executive Officer | Acquired P | 6,607 | $2,039.84 | $13.48Mn | 88 | Direct |
| 21 Jun, 2023 | Robert Michael Dudley | Chief Executive Officer | Acquired P | 12,000 | $2,121.20 | $25.45Mn | 103 | Direct |
| 09 Jun, 2023 | Robert Michael Dudley | Chief Executive Officer | Acquired P | 19,000 | $2,208.00 | $41.95Mn | 76 | Direct |
| 09 Jun, 2023 | Robert Michael Dudley | Chief Executive Officer | Acquired P | 19,000 | $2,208.00 | $41.95Mn | 1,140 | Direct |
| 19 May, 2023 | Thomas A Fitzgerald | Chief Financial Officer | Acquired A | 300,000 | $0.00 | $0 | 15,000 | Direct |
| 19 May, 2023 | Magda Marquet | Director | Acquired A | 45,000 | $0.00 | $0 | 2,250 | Direct |
| 19 May, 2023 | Philippe Calais | Director | Acquired A | 45,000 | $0.00 | $0 | 2,250 | Direct |
| 19 May, 2023 | Robert Michael Dudley | Chief Executive Officer | Acquired A | 735,000 | $0.00 | $0 | 36,750 | Direct |
| 19 May, 2023 | Erik Manting | Director | Acquired A | 45,000 | $0.00 | $0 | 2,250 | Direct |