| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Fairmount Funds Management LLC | Director, 10%+ Owner | 200 BARR HARBOR DRIVE, SUITE 400, WEST CONSHOHOCKEN | /s/ Tomas Kiselak, Managing Member of Fairmount Funds Management LLC | 2025-10-08 | 0001802528 |
| Fairmount Healthcare Fund II L.P. | Director, 10%+ Owner | 200 BARR HARBOR DRIVE, SUITE 400, WEST CONSHOHOCKEN | /s/ Tomas Kiselak, Managing Member of Fairmount Healthcare Fund II, L.P. | 2025-10-08 | 0001769651 |
| Fairmount Healthcare Co-Invest IV L.P. | Director, 10%+ Owner | 200 BARR HARBOR DRIVE, SUITE 400, WEST CONSHOHOCKEN | /s/ Tomas Kiselak, Managing Member of Fairmount Healthcare Co-Invest IV, L.P. | 2025-10-08 | 0002042283 |
| Kiselak Tomas | Director, 10%+ Owner | 200 BARR HARBOR DRIVE, SUITE 400, WEST CONSHOHOCKEN | /s/ Tomas Kiselak | 2025-10-08 | 0001830177 |
| Harwin Peter Evan | Director, 10%+ Owner | 200 BARR HARBOR DRIVE, SUITE 400, WEST CONSHOHOCKEN | /s/ Peter Harwin | 2025-10-08 | 0001663607 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | JBIO | Common Stock | Award | $12.2M | +1.33M | +236.14% | $9.14 | 1.9M | Oct 6, 2025 | By Fairmount Healthcare Fund II L.P. | F1, F2 |
| holding | JBIO | Common Stock | 2.66M | Oct 6, 2025 | By Fairmount Healthcare Co-Invest IV L.P. | F2 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | JBIO | Pre-Funded Warrant (Right to Buy) | Award | $7.82M | +855K | $9.14 | 855K | Oct 6, 2025 | Common Stock | 855K | $0.00 | By Fairmount Healthcare Fund II L.P. | F1, F2, F3 |
| Id | Content |
|---|---|
| F1 | The shares of Common Stock and Pre-Funded Warrants were purchased from the Issuer in a private placement, which transaction is exempt from Section 16(b) in accordance with Rule 16b-3(d)(1) promulgated under the Securities Exchange Act of 1934, as amended. |
| F2 | Fairmount Funds Management LLC ("Fairmount") is the investment manager for Fairmount Healthcare Fund II L.P. and Fairmount Healthcare Co-Invest IV L.P. The managers of Fairmount are Peter Harwin and Tomas Kiselak. Fairmount, Mr. Harwin, and Mr. Kiselak disclaim beneficial ownership of any of the reported securities, except to the extent of their pecuniary interest therein. |
| F3 | The Pre-Funded Warrants have no expiration date and are exercisable at any time after the date of issuance. A holder of Pre-Funded Warrants may not exercise the Pre-Funded Warrant if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of outstanding shares of common stock of the Issuer immediately after giving effect to such exercise. |
Fairmount may be deemed a director by deputization of Issuer by virtue of the fact that Tomas Kiselak serves on the board of directors of the Issuer and is also a Managing Member of Fairmount.