| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| GADICKE ANSBERT | 10%+ Owner | C/O MPM BIOIMPACT LLC, 399 BOYLSTON STREET, SUITE 1100, BOSTON | /s/ Ansbert Gadicke | 08 Jan 2026 | 0001134655 |
| MPM ASSET MANAGEMENT LLC | 10%+ Owner | C/O MPM BIOIMPACT LLC, 399 BOYLSTON STREET, SUITE 1100, BOSTON | /s/ Ansbert Gadicke, manager of MPM Asset Management LLC | 08 Jan 2026 | 0001263048 |
| Oncology Impact Private Investment Fund 2, L.P. | 10%+ Owner | C/O MPM BIOIMPACT LLC, 399 BOYLSTON STREET, SUITE 1100, BOSTON | /s/ Ansbert Gadicke, managing member of MPM Oncology Investments 2 LLC | 08 Jan 2026 | 0002104306 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | AKTS | Common Stock | 341,709 | 08 Jan 2026 | See Footnote | F1, F2 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | AKTS | Series Seed Redeemable Convertible Preferred Stock | 08 Jan 2026 | Common Stock | 1,314,262 | $0.000000 | See Footnote | F1, F3, F4 | ||||||
| holding | AKTS | Series A Redeemable Convertible Preferred Stock | 08 Jan 2026 | Common Stock | 5,914,197 | $0.000000 | See Footnote | F1, F3, F5 | ||||||
| holding | AKTS | Series B Redeemable Convertible Preferred Stock | 08 Jan 2026 | Common Stock | 1,577,119 | $0.000000 | See Footnote | F1, F3, F6 |
| Id | Content |
|---|---|
| F1 | The Reporting Persons disclaim beneficial ownership of the securities except to the extent of his or its pecuniary interest therein. |
| F2 | The shares are held by MPM Asset Management LLC, of which Dr. Gadicke is the manager. |
| F3 | Each share of Series Seed Redeemable Convertible Preferred Stock, Series A Redeemable Convertible Preferred Stock and Series B Redeemable Convertible Preferred Stock is convertible into shares of the Issuer's Common Stock on a 3.8044-for-1 basis. Upon the closing of the Issuer's initial public offering, all shares of Series Seed Redeemable Convertible Preferred Stock, Series A Redeemable Convertible Preferred Stock and Series B Redeemable Convertible Preferred Stock will convert into shares of Common Stock of the Issuer. The Series Seed Redeemable Convertible Preferred Stock, Series A Redeemable Convertible Preferred Stock and Series B Redeemable Convertible Preferred Stock have no expiration date. |
| F4 | The shares are held as follows: 556,810 by MPM BioVentures 2018, L.P. ("BV 2018"), 29,593 by MPM BioVentures 2018 (B), L.P. ("BV 2018(B)"), 10,988 by MPM Asset Management Investors BV2018 LLC ("AM BV2018"), 119,478 by MPM Oncology Innovations Fund, L.P. ("MPM Oncology") and 597,393 by Oncology Impact Private Investment Fund 2, L.P. ("MPM Oncology Impact"). MPM BioVentures 2018 GP LLC and MPM BioVentures 2018 LLC ("BV2018 LLC") are the direct and indirect general partners of BV 2018 and BV 2018(B). BV 2018 LLC is the manager of AM BV2018. Drs. Evnin and Gadicke are managing directors of BV 2018 LLC and managers of MPM Oncology Innovations Fund GP LLC, which is the general partner of MPM Oncology. Dr. Gadicke is the managing member of MPM Oncology Investments 2 LLC, which is the general partner of MPM Oncology Impact. |
| F5 | The shares are held as follows: 2,505,648 by BV 2018, 133,170 by BV 2018(B), 49,452 by AM BV2018, 537,654 by MPM Oncology and 2,688,273 by MPM Oncology Impact. |
| F6 | The shares are held as follows: 668,173 by BV 2018, 35,512 by BV 2018(B), 13,187 by AM BV2018, 143,374 by MPM Oncology and 716,873 by MPM Oncology Impact. |
This filing is 1 of 2 identical filings due to limitations on number of Reporting Persons. See Form 3 filed by MPM BioVentures 2018, L.P.