X0609 4 2026-10-22 0001828161 FTC Solar, Inc. FTCI 0001233432 SADASIVAM SHAKER 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 48889 0 A 304353 D Common Stock 301720 I By limited liability company 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. The Reporting Person is the Manager of ChristSivam, LLC and has sole voting and dispositive power with respect to the shares held by ChristSivam, LLC. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that he is the beneficial owner of such securities for Section 16 or any other purpose. /s/ Cathy Behnen, as Attorney-in-Fact 2026-10-23