As of May 30, 2026, iBio's top three insider holders are Antonio Bernardino Guimaraes Parada (Director, 183.82K shares), Robert Matthew Lutz (Officer, 102.17K shares), Felipe Duran (Chief Financial Officer, 35.97K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| David Arkowitz | - | 18,382 | 0 | 13 Jan, 2025 |
| William D Clark | - | 1,838 | 0 | 13 Jan, 2025 |
| Gary Sender | - | 9,191 | 0 | 13 Jan, 2025 |
| Martin Brenner | Chief Scientific Officer | 30,652 | 0 | 23 Mar, 2026 |
| Robert Matthew Lutz | - | 102,165 | 0 | 15 Nov, 2022 |
| Felipe Duran | Chief Financial Officer | 35,974 | 0 | 23 Mar, 2026 |
| Marc Banjak | Chief Legal Officer | 25,000 | 0 | 27 Mar, 2026 |
| Antonio Bernardino Guimaraes Parada | - | 0 | 183,823 | 13 Jan, 2025 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 26 Mar, 2026 | Marc Banjak | Common Stock | A | 12,500 | $1.64 | 23,566 | D | P |
| 26 Mar, 2026 | Marc Banjak | Common Stock | A | 1,434 | $1.76 | 25,000 | D | P |
| 19 Mar, 2026 | Felipe Duran | Common Stock | A | 24,835 | $2.02 | 35,974 | D | P |
| 19 Mar, 2026 | Martin Brenner | Common Stock | A | 12,336 | $2.02 | 30,652 | D | P |
| 28 Jan, 2026 | Martin Brenner | Stock Option (right to buy) | A | 479,000 | $0.00 | 479,000 | D | A |
| 28 Jan, 2026 | Felipe Duran | Stock Option (right to buy) | A | 179,000 | $0.00 | 179,000 | D | A |
| 28 Jan, 2026 | Marc Banjak | Stock Option (right to buy) | A | 146,000 | $0.00 | 146,000 | D | A |
| 20 Nov, 2025 | David Arkowitz | Stock Option (right to buy) | A | 13,500 | $0.00 | 13,500 | D | A |
| 20 Nov, 2025 | Antonio Bernardino Guimaraes Parada | Stock Option (right to buy) | A | 13,500 | $0.00 | 13,500 | D | A |
| 20 Nov, 2025 | Gary Sender | Stock Option (right to buy) | A | 13,500 | $0.00 | 13,500 | D | A |
| 20 Nov, 2025 | Evert B. Schimmelpennink | Stock Option (right to buy) | A | 13,500 | $0.00 | 13,500 | D | A |
| 20 Nov, 2025 | William D Clark | Stock Option (right to buy) | A | 13,500 | $0.00 | 13,500 | D | A |
| 20 Nov, 2025 | Alexandra Kropotova | Stock Option (right to buy) | A | 13,500 | $0.00 | 13,500 | D | A |
| 20 Oct, 2025 | Marc Banjak | Stock Option (right to buy) | A | 55,000 | $0.00 | 55,000 | D | A |
| 20 Oct, 2025 | Felipe Duran | Stock Option (right to buy) | A | 75,000 | $0.00 | 75,000 | D | A |
| 20 Oct, 2025 | Martin Brenner | Stock Option (right to buy) | A | 180,000 | $0.00 | 180,000 | D | A |
| 21 Feb, 2025 | Martin Brenner | Stock Option (right to buy) | A | 230,700 | $0.00 | 230,700 | D | A |
| 21 Feb, 2025 | Marc Banjak | Stock Option (right to buy) | A | 71,000 | $0.00 | 71,000 | D | A |
| 21 Feb, 2025 | Felipe Duran | Stock Option (right to buy) | A | 84,700 | $0.00 | 84,700 | D | A |
| 10 Jan, 2025 | Gary Sender | Common Stock | A | 9,191 | $2.72 | 9,191 | D | P |