PERCEPTIVE ADVISORS LLC bought SLDB

Footnotes

This option was granted on June 10, 2026 and vests in full on the earlier to occur of the one-year anniversary of the grant date and immediately prior to the Issuer's next annual meeting of stockholders occurring after the grant date, and will vest automatically as to 100% of the unvested portion of such option upon specified change in control events.; Consists of options to purchase shares of the Issuer's common stock awarded to Adam Stone in connection with his role as a member of the Issuer's Board of Directors. Mr. Stone is the Chief Investment Officer of Perceptive Advisors, LLC (the "Advisor"). The Advisor may be deemed to have an indirect pecuniary interest in the options to purchase common stock of the Issuer reported herein because the Advisor has the right to receive the director compensation provided in respect of Mr. Stone's board service through a partial management fee offset.; Joseph Edelman is the managing member of the Advisor. The Advisor serves as the investment manager to Perceptive Life Sciences Master Fund Ltd. (the "Master Fund"). Each of Mr. Edelman, the Advisor and the Master Fund disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his/its indirect pecuniary interest therein, and this report shall not be deemed an admission that Mr. Edelman, the Advisor or the Master Fund is the beneficial owner of such securities for purposes of Section 16 or for any other purposes.