X0609 4 2026-06-03 0001794546 CARLSMED, INC. CARL 0001225480 ROOT JONATHAN D false C/O CARLSMED, INC. 1800 ASTON AVE., SUITE 100 CARLSBAD CA 92008 true false false false false Common Stock 2026-06-03 4 A false 13698 0 A 497697 D Common Stock 4305806 I See footnotes Common Stock 218524 I See footnotes Common Stock 1117743 I See footnotes Constitutes an award of restricted stock units ("RSUs") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. The RSUs will vest in full on the earlier of (i) the day before the Issuer's 2027 annual meeting of stockholders or (ii) June 3, 2027, subject, in all cases, to the Reporting Person's continued service as a member of the Board of Directors through such vesting date. Stock held by U.S. Venture Partners XII, L.P. ("USVP XII"). Stock held by U.S. Venture Partners XII-A, L.P. ("USVP XII-A"). Stock held by U.S. Venture Partners Select Fund I, L.P., ("USVP SFI") on its own behalf and as nominee for U.S. Venture Partners Select Fund I-A, L.P. ("USVP SFI-A"). 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. /s/ Leonard Greenstein, as attorney-in-fact for Jonathan Root 2026-06-22