| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 10%+ Owner | 357 TEHAMA STREET #3, SAN FRANCISCO | /s/ Oleg Nodelman | 2025-05-06 | 0001587114 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | PRTA | Ordinary Shares | Sale | -$27.7M | -3.32M | -28.64% | $8.36 | 8.27M | May 2, 2025 | See Note | F1, F2, F3, F4 |
| transaction | PRTA | Ordinary Shares | Sale | -$7.93M | -978K | -11.83% | $8.11 | 7.29M | May 5, 2025 | See Note | F1, F5, F6, F7 |
| transaction | PRTA | Ordinary Shares | Sale | -$15.2M | -1.98M | -27.22% | $7.64 | 5.3M | May 6, 2025 | See Note | F1, F8, F9, F10 |
EcoR1 Capital, LLC is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.
| Id | Content |
|---|---|
| F1 | The reporting persons are EcoR1 Capital, LLC ("Ecor1"), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. ("Qualified Fund"). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the "Fund"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein. |
| F2 | Qualified Fund sold 3,097,619 of the shares sold in this transaction. |
| F3 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.2715 to $9.1789, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold at each seperate price within the ranges set forth in this footnote and footnotes 6 and 9. |
| F4 | After this transaction, Qualified Fund held 7,750,234 shares of the Issuer's Common Stock. |
| F5 | Qualified Fund sold 916,492 of the shares of sold in this transaction. |
| F6 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.1097 to $8.1972, inclusive. |
| F7 | After this transaction, Qualified Fund held 6,833,742 shares of the Issuer's Common Stock |
| F8 | Qualified Fund sold 1,859,851 of the shares sold in this transaction. |
| F9 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.4637 to $8.5939, inclusive. |
| F10 | After this transaction, Qualified Fund held 4,973,891 of the Issuer's Ordinary Shares. |