ROOT JONATHAN D bought CARL

Footnotes

These securities were previously reported on a Form 3 filed by the Reporting Person as preferred stock of the Issuer. Each share of preferred stock of the Issuer converted into one share of the Issuer's common stock immediately prior to the closing of the Issuer's initial public offering on a 1-to-1 basis without payment of additional consideration. The preferred stock has no expiration date.; Stock held by U.S. Venture Partners XII, L.P. ("USVP XII").; Presidio Management Group XII, L.L.C ("PMG XII") is the general partner of USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C ("PMG SFI," and, together with USVP XII, USVP XII-A, USVP SFI, USVP SFI-A, and PMG XII, "USVP") is the general partner of USVP SFI and USVP SFI-A. The Reporting Person is a managing member of PMG XII and PMG SFI and may be deemed to share voting and dispositive power over the stock held by USVP. The Reporting Person disclaims beneficial ownership of such stock, except to the extent of any pecuniary interest therein.