X0609 4 2026-10-22 0001828161 FTC Solar, Inc. FTCI 0001331942 Chatila Ahmad R false 10900 STONELAKE BLVD. SUITE 100 QUARRY OAKS II BUILDING AUSTIN TX 78759 true false false false false Common Stock 2026-10-22 4 A false 22222 0 A 260034 D Reflects a grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan in lieu of cash consideration otherwise payable for the Reporting Person's service on the Issuer's board of directors and is fully vested on the date of grant. /s/ Cathy Behnen, as Attorney-in-Fact 2026-10-23