X0306 4 2022-03-08 0 0001828161 FTC Solar, Inc. FTCI 0001854565 Mortazavi Ali C/O FTC SOLAR INC. 9020 N CAPITAL OF TEXAS HWY, SUITE I-260 AUSTIN TX 78759 0 1 0 0 EVP, GLOBAL SALES AND MKTNG COMMON STOCK 2022-03-08 4 S 0 3855 4.61 D 649594 D The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. Represents a weighted average sales price per share for these shares, which were sold in multiple transactions at prices ranging from $4.57 to $4.64. The Reporting Person has provided to the Issuer, and undertakes to provide to 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. /s/ Jacob D. Wolf, as Attorney-in-Fact 2022-03-10