Item 4 — Purpose of Transaction
The Reporting Person is filing this Schedule 13D to report that he has acquired securities of the Issuer in connection with his service as Chief Executive Officer of the Issuer, which are further described below. On June 12, 2024, the Issuer, as approved by the Issuer's board of directors (the "Board"), issued stock options to the Reporting Person exercisable for up to 11,251 shares of common stock, which were issued pursuant to the Issuer's Amended and Restated 2018 Employee Stock Incentive Plan (the "Plan"). These stock options vest in three (3) equal annual installments, with the first installment vesting on the first anniversary of the grant date. On September 4, 2025, the Issuer, as approved by the compensation committee of the Board (the "Compensation Committee"), issued stock options to the Reporting Person exercisable for up to 2,621,100 shares of common stock, which were issued pursuant to the Plan. One-third (1/3) of these stock options vested on the grant date, and the remainder vest in equal quarterly installments over a two (2) year period. On December 30, 2025, the Issuer, as approved by the Compensation Committee, issued stock options to the Reporting Person exercisable for up to 2,621,100 shares of common stock, which were issued pursuant to the Plan. One-third (1/3) of these stock options vested on the grant date, and the remainder vest in equal quarterly installments over a two (2) year period. As of the date of this Schedule 13D, 2,405,770 shares of common stock are issuable upon the exercise of the Vested Options. Except as set forth herein, the Reporting Person has no present plans or proposals that relate to or would result in any of the actions required to be described in subsections (a) through (j) of Item 4 of Schedule 13D. The Reporting Person may, at any time, review or reconsider his positions with respect to the Issuer and formulate plans or proposals with respect to any of such matters, but except as described herein, he has no present intention of doing so.