JANX's three largest insider shareholders as of May 30, 2026 are Capital Management, L.P. Ra (Director, 8.12Mn shares), Ventures Xi, L.P. Avalon (TenPercentOwner, 7.38Mn shares), Jay Lichter (Director, 7.24Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Advisors Llc Orbimed | - | 0 | 231,098 | 30 Dec, 2021 |
| Eric Dobmeier | - | 9,981 | 0 | 13 Jun, 2025 |
| Vickie L Capps | - | 74,098 | 0 | 13 Jun, 2025 |
| Ronald W Barrett | - | 6,250 | 0 | 13 Jun, 2025 |
| Capital Management, L.P. Ra | - | 0 | 8,117,246 | 21 Jul, 2023 |
| Peter A. Thompson | - | 0 | 231,098 | 30 Dec, 2021 |
| Jay Lichter | - | 0 | 7,244,907 | 05 Jun, 2024 |
| Sheila Gujrathi | - | 118,889 | 0 | 13 Jun, 2025 |
| Alana B. Mcnulty | - | 6,250 | 0 | 13 Jun, 2025 |
| Ventures Xi, L.P. Avalon | - | 2,071,799 | 5,305,966 | 18 Oct, 2024 |
| Winston Kung | - | 6,250 | 0 | 13 Jun, 2025 |
| Tighe Reardon | Acting Chief Financial Officer | 0 | 3,973,691 | 05 Jun, 2024 |
| Natasha Hernday | - | 8,731 | 0 | 13 Jun, 2025 |
| Jake Simson | - | 6,250 | 0 | 13 Jun, 2025 |
| David Alan Campbell | President And Ceo | 381,582 | 0 | 02 Jan, 2025 |
| Andrew Hollman Meyer | Chief Business Officer | 83,095 | 0 | 02 Jan, 2026 |
| Byron Robinson | Chief Strategy Officer | 28,000 | 0 | 03 Jan, 2025 |
| Charles M. Winter | Chief Technical Officer | 106,321 | 0 | 02 Jan, 2026 |
| Thomas Diraimondo | Chief Scientific Officer | 155,825 | 0 | 02 Jan, 2026 |
| Maria Dobek | Vice President, Accounting | 34,308 | 0 | 02 Jan, 2026 |
| Zachariah Mciver | Chief Medical Officer | 52,286 | 0 | 02 Jan, 2026 |
| Janeen Noel Doyle | Chief Corp. Bus. Dev. Ofcr | 80,000 | 0 | 02 Jan, 2026 |
| William Go | Chief Medical Officer | 44,000 | 0 | 04 Feb, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 02 Feb, 2026 | William Go | Common Stock | A | 44,000 | $0.00 | 44,000 | D | A |
| 02 Feb, 2026 | William Go | Stock option (right to buy) | A | 154,000 | $0.00 | 154,000 | D | A |
| 02 Jan, 2026 | Janeen Noel Doyle | Common Stock | A | 36,000 | $0.00 | 80,000 | D | A |
| 02 Jan, 2026 | Andrew Hollman Meyer | Common Stock | D | 1,879 | $13.73 | 83,095 | D | S |
| 02 Jan, 2026 | Zachariah Mciver | Common Stock | D | 2,714 | $13.73 | 23,286 | D | S |
| 02 Jan, 2026 | Zachariah Mciver | Common Stock | D | 2,714 | $13.73 | 23,286 | D | S |
| 02 Jan, 2026 | Maria Dobek | Common Stock | D | 1,462 | $13.73 | 15,373 | D | S |
| 02 Jan, 2026 | Andrew Hollman Meyer | Common Stock | D | 1,879 | $13.73 | 83,095 | D | S |
| 02 Jan, 2026 | Charles M. Winter | Common Stock | D | 2,401 | $13.73 | 77,721 | D | S |
| 02 Jan, 2026 | Charles M. Winter | Common Stock | D | 2,401 | $13.73 | 77,721 | D | S |
| 02 Jan, 2026 | Thomas Diraimondo | Common Stock | D | 2,505 | $13.73 | 124,425 | D | S |
| 02 Jan, 2026 | Zachariah Mciver | Common Stock | A | 29,000 | $0.00 | 52,286 | D | A |
| 02 Jan, 2026 | Thomas Diraimondo | Common Stock | A | 31,400 | $0.00 | 155,825 | D | A |
| 02 Jan, 2026 | Charles M. Winter | Common Stock | A | 28,600 | $0.00 | 106,321 | D | A |
| 02 Jan, 2026 | Zachariah Mciver | Common Stock | A | 29,000 | $0.00 | 52,286 | D | A |
| 02 Jan, 2026 | Maria Dobek | Common Stock | A | 18,935 | $0.00 | 34,308 | D | A |
| 02 Jan, 2026 | Janeen Noel Doyle | Stock option (right to buy) | A | 126,000 | $0.00 | 126,000 | D | A |
| 02 Jan, 2026 | Charles M. Winter | Common Stock | A | 28,600 | $0.00 | 106,321 | D | A |
| 02 Jan, 2026 | Thomas Diraimondo | Stock option (right to buy) | A | 109,900 | $0.00 | 109,900 | D | A |
| 02 Jan, 2026 | Zachariah Mciver | Stock option (right to buy) | A | 101,500 | $0.00 | 101,500 | D | A |