Tananbaum James B. bought LTGO

Footnotes

Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.; The securities are held of record by Foresite Capital Opportunity Fund V, L.P. (Opportunity Fund V). Foresite Capital Opportunity Management V, LLC (FCOM V) is the general partner of Opportunity Fund V and may be deemed to have sole voting and dispositive power over the shares held by Opportunity Fund V. The Reporting Person is the sole managing member of FCOM V and may be deemed to have sole voting and dispositive power over the securities held by Opportunity Fund V. Each of Opportunity Fund V, FCOM V and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.