FTCI · FTC Solar, Inc.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $4.200 to $4.249. 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 purchased at each separate price within the range.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $3.980 to $3.990. 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 purchased at each separate price within the range.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $3.680 to $3.700. 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 purchased at each separate price within the range.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $3.430 to $3.460. 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 purchased at each separate price within the range.

Reflects a grant of performance based RSUs pursuant to an employment agreement and the Issuer's 2021 Stock Incentive Plan, and is subject to vesting, in whole or in part as further described in the employment agreement, upon (i) the Issuer's publicly traded common stock achieving a $10 and/or $20 price during the three year period from the grant date and (ii) the recipient's continued employment with the Issuer on any such date of achievement.

Reflects a grant of restricted stock units (RSUs) pursuant to an employment agreement and the Issuer's 2021 Stock Incentive Plan, and is subject to vesting as follows: (a) 200,000 of the RSUs (the "Three-Year Time-Based RSUs") vest over a three-year period, with 33.33% of the Three-Year Time-Based RSUs vesting on the one-year anniversary of the grant date, and 1/36 of such Three-Year Time-Based RSUs vesting at the end of each month for the next 24 months following the grant date; and (b) 200,000 of the RSUs (the "Four-Year Time-Based RSUs") vest over a four-year period, with 25% of such Four-Year Time-Based RSUs vesting on the one-year anniversary of the grant date, and 1/48 of such Four-Year Time-Based RSUs vesting at the end of each month for the next thirty-six months following the grant date.

Represents a grant of Performance Stock Units ("PSUs") pursuant to the Issuer's 2021 Stock Incentive Plan.

These PSUs vest in 3 annual tranches starting on October 26, 2026, with vesting of each tranche conditioned upon the Issuer's common stock satisfying a specified per share price threshold and the Reporting Person satisfying a service condition.

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.

Represents a weighted average sales price per share for these shares, which were sold in multiple transactions at prices ranging from $10.810 to $11.080. 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 $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 $10.790 to $11.290. 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 purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $9.400 to $9.655. 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.

Reflects a grant of restricted stock units which will vest in three equal annual installments on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service on the board of directors of the Issuer.

Shares were gifted by the Reporting Person to a charity.

Reflects sales pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2023.

Represents a weighted average sales price per share for these shares, which were sold in multiple transactions at prices ranging from $8.80 to $9.50. 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.

Represents a grant of Performance Stock Units ("PSUs") pursuant to the Issuer's 2021 Stock Incentive Plan.

These PSUs vest in 3 annual tranches, with vesting of each tranche conditioned upon the Issuer's common stock satisfying a specified per share price threshold and the Reporting Person satisfying a service condition.

Represents a grant of Performance Stock Units ("PSUs") pursuant to the Issuer's 2021 Stock Incentive Plan.

These PSUs vest in 3 annual tranches, with vesting of each tranche conditioned upon the Issuer's common stock satisfying a specified per share price threshold and the Reporting Person satisfying a service condition.

Represents a grant of Performance Stock Units ("PSUs") pursuant to the Issuer's 2021 Stock Incentive Plan.

These PSUs vest in 3 annual tranches, with vesting of each tranche conditioned upon the Issuer's common stock satisfying a specified per share price threshold and the Reporting Person satisfying a service condition.

Reflects a grant of restricted stock units will vest on in three equal annual installments on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service on the board of directors (the "Board") of the Issuer.

Reflects an annual grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan, prorated to the date of the Reporting Person's appointment to the Board of the Issuer, and is subject to vesting upon the earlier of (x) the one year anniversary of grant and (y) the Issuer's 2026 shareholder meeting, subject to the Reporting Person's continued service on the Board.

Reflects an annual grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan in consideration of the Reporting Person's service on the board of directors (BOD) of the Issuer, and is subject to vesting upon the earlier of (x) the one year anniversary of grant and (y) the Issuer's 2026 shareholder meeting, subject to continued service on the BOD.

Reflects an annual grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan in consideration of the Reporting Person's service on the board of directors (BOD) of the Issuer, and is subject to vesting upon the earlier of (x) the one year anniversary of grant and (y) the Issuer's 2026 shareholder meeting, subject to continued service on the BOD.

Reflects the effect of the Issuer's 10-for-1 reverse stock split, effective as of November 29, 2024.

Reflects an annual grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan in consideration of the Reporting Person's service on the BOD of the Issuer, and is subject to vesting upon the earlier of (x) the one year anniversary of grant and (y) the Issuer's 2026 shareholder meeting, subject to continued service on the BOD.

Reflects the effect of the Issuer's 10-for-1 reverse stock split, effective as of November 29, 2024.

Reflects an annual grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan in consideration of the Reporting Person's service on the board of directors (BOD) of the Issuer, and is subject to vesting upon the earlier of (x) the one year anniversary of grant and (y) the Issuer's 2026 shareholder meeting, subject to continued service on the BOD.

Reflects the effect of the Issuer's 10-for-1 reverse stock split, effective as of November 29, 2024.

Reflects an annual grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan in consideration of the Reporting Person's service on the board of directors (BOD) of the Issuer, and is subject to vesting upon the earlier of (x) the one year anniversary of grant and (y) the Issuer's 2026 shareholder meeting, subject to continued service on the BOD.

Reflects an annual grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan in consideration of the Reporting Person's service on the board of directors (BOD) of the Issuer, and is subject to vesting upon the earlier of (x) the one year anniversary of grant and (y) the Issuer's 2026 shareholder meeting, subject to continued service on the BOD.

Reflects the effect of the Issuer's 10-for-1 reverse stock split, effective as of November 29, 2024.

Reflects an annual grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan in consideration of the Reporting Person's service on the board of directors (BOD) of the Issuer, and is subject to vesting upon the earlier of (x) the one year anniversary of grant and (y) the Issuer's 2026 shareholder meeting, subject to continued service on the BOD.

Reflects the effect of the Issuer's 10-for-1 reverse stock split, effective as of November 29, 2024.

Reflects a grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan, and is subject to the Issuer's standard four year vesting schedule, subject to continued employment.

Reflects the effect of the Issuer's 10-for-1 reverse stock split, effective as of November 29, 2024.

Reflects a grant of restricted stock units pursuant to the Issuer's 2021 Stock Incentive Plan, and is subject to the Issuer's standard four year vesting schedule, subject to continued employment.

Reflects a grant of restricted stock units ("RSUs") pursuant to the Issuer's 2021 Stock Incentive Plan, and is subject to the Issuer's standard four year vesting schedule, subject to continued employment.

Reflects the effect of the Issuer's 10-for-1 reverse stock split, effective as of November 29, 2024, and incldues 2,621 shares of Common Stock relating to a prior RSU grant on April 29, 2022 that was not perviously reflected.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $2.867 to $2.996. 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 purchased at each separate price within the range.

This Form 4 amends the original Form 4 filed by the Reporting Person on April 3, 2025, and reflects the effect of the issuer's 10-for-1 reverse stock split, effective as of November 29, 2024 (the "Reverse Stock Split"). Accordingly, the Reporting Person beneficially owned 212,027 shares of Common Stock as a result of the Reverse Stock Splitand prior to the transactions reported on April 3, 2025.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $2.889 to $2.984. 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 purchased at each separate price within the range.

This Form 4 amends the original Form 4 filed by the Reporting Person on April 2, 2025, and reflects the effect of the issuer's 10-for-1 reverse stock split, effective as of November 29, 2024 (the "Reverse Stock Split"). Accordingly, the Reporting Person beneficially owned 195,105 shares of Common Stock as a result of the Reverse Stock Split and prior to the transactions reported on April 2, 2025.

Represents a weighted average sales price per share for these shares, which were sold in multiple transactions at prices ranging from $2.620 to $2.655. 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. 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 purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $3.090 to $3.160. 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 purchased at each separate price within the range.

This Form 4 amends the original Form 4 filed by the Reporting Person on December 9, 2024, and reflects the effect of the issuer's 10-for-1 reverse stock split, effective as of November 29, 2024 (the "Reverse Stock Split"). Accordingly, the Reporting Person beneficially owned 650,000 shares of Common Stock as a result of the Reverse Stock Split and prior to the transactions reported on December 9, 2024.

This Form 4 amends the original Form 4 filed by the Reporting Person on December 9, 2024, and reflects the effect of the issuer's 10-for-1 reverse stock split, effective as of November 29, 2024 (the "Reverse Stock Split"). Accordingly, the Reporting Person beneficially owned 650,000 shares of Common Stock as a result of the Reverse Stock Split and prior to the transactions reported on December 9, 2024.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $0.207 to $0.213. 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 purchased at each separate price within the range.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $0.223 to $0.230. 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 purchased at each separate price within the range.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $0.250 to $0.270. 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 purchased at each separate price within the range.

Reflects a grant of performance based RSUs pursuant to an employment agreement as an inducement grant to a new hire outside of the Issuer's 2021 Stock Incentive Plan, and is subject to vesting, in whole or in part as further described in the employment agreement, upon (i) the Issuer's publicly traded common stock achieving a $5, $8 and/or $10 price during the four year period from the grant date and (ii) the recipient's continued employment with the Issuer on any such date of achievement.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $0.243 to $0.254. 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 purchased at each separate price within the range.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $0.245 to $0.250. 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 purchased at each separate price within the range.

Reflects a grant of restricted stock units (RSUs) pursuant to an employment agreement as an inducement grant to a new hire outside of the Issuer's 2021 Stock Incentive Plan, and is subject to a four-year vesting period as follows: (a) 25% of RSUs will vest on the grant date and (b) 1/48 of the RSUs will vest at the end of each month thereafter for the next 36 months; provided, in each case, in each case, that the reporting person is an active employee as of each such relevant vesting date.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $0.235 to $0.260. 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 purchased at each separate price within the range.

Represents a weighted average purchase price per share for these shares, which were purchased in multiple transactions at prices ranging from $0.239 to $0.250. 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 purchased at each separate price within the range.