| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| TCG Crossover GP II, LLC | 10%+ Owner | 245 LYTTON AVE., SUITE 350, PALO ALTO | /s/ TCG Crossover GP II, LLC /s/ Craig Skaling, Authorized Signatory | 28 Jan 2026 | 0001969280 |
| TCG Crossover Fund II, L.P. | 10%+ Owner | 245 LYTTON AVE., SUITE 350, PALO ALTO | /s/ TCG Crossover Fund II, L.P. /s/ Craig Skaling, Authorized Signatory | 28 Jan 2026 | 0001969281 |
| TCG Crossover GP III, LLC | 10%+ Owner | 245 LYTTON AVE., SUITE 350, PALO ALTO | /s/ TCG Crossover GP III, LLC /s/ Craig Skaling, Authorized Signatory | 28 Jan 2026 | 0002062816 |
| TCG Crossover Fund III, L.P. | 10%+ Owner | 245 LYTTON AVE., SUITE 350, PALO ALTO | /s/ TCG Crossover Fund III, L.P. /s/ Craig Skaling, Authorized Signatory | 28 Jan 2026 | 0002062644 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | SRZN | Common Stock | 637,005 | 26 Jan 2026 | See footnote | F1 | |||||
| holding | SRZN | Common Stock | 637,005 | 26 Jan 2026 | See footnote | F2 |
| Id | Content |
|---|---|
| F1 | These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities. |
| F2 | These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities. |
Exhibit 24 - Power of Attorney