X0508 4 2025-12-30 0001828161 FTC Solar, Inc. FTCI 0002031701 Brandt Yann 10900 STONELAKE BLVD. SUITE 100 QUARRY OAKS II BUILDING AUSTIN TX 78759 true true false false Chief Executive Officer false Common Stock 2025-12-30 4 S false 37450 10.83 D 776750 D Common Stock 2025-12-30 4 S false 325 11.67 D 776425 D Represents a weighted average sales price per share for these shares, which were sold in multiple transactions at prices ranging from $10.510 to $11.370. The Reporting Person undertakes to provide to the Issuer, the staff of the Commission or any security holder of the Issuer, upon request, full information regarding the number of shares sold at each separate price within the range. The shares were sold in order to satisfy tax obligations of the Reporting Person that became payable due to the vesting and settlement of certain restricted stock units. Represents a weighted average sales price per share for these shares, which were sold in multiple transactions at prices ranging from $11.600 to $11.960. The Reporting Person undertakes to provide to the Issuer, the staff of the Commission or any security holder of the Issuer, upon request, full information regarding the number of shares sold at each separate price within the range. The shares were sold in order to satisfy tax obligations of the Reporting Person that became payable due to the vesting and settlement of certain restricted stock units. /s/ Cathy Behnen, as Attorney-in-Fact 2025-12-31