Company: FTCI
Filing Date: 2025-05-01
Form Type: S-3
Source: 0001193125-25-109056
Chunk: 36

Company: FTC Solar, Inc.
Filing Date: 2025-05-01
Form: S-3
Chunk 36
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us. You should direct requests for those documents to FTC Solar, Inc., 9020 N Capital of Texas Hwy, Suite I-260,Austin, Texas 78759, Attention: Bill Michalek (telephone: (737) 787-7906).Exhibits to any documents incorporated by reference in this prospectus will not be sent, however, unless those exhibits have specifically been incorporated by reference into such documents. 27

THE INFORMATION IN THIS PROSPECTUS SUPPLEMENT IS NOT COMPLETE AND MAY BE CHANGED. WE MAY NOT SELL THESE SECURITIES OR ACCEPT AN OFFER TO BUY THESE SECURITIES UNTIL THE REGISTRATION STATEMENT FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS SUPPLEMENT IS NOT AN OFFER TO SELL THESE SECURITIES AND IT IS NOT SOLICITING AN OFFER TO BUY THESE SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.

SUBJECT TO COMPLETION, DATED MAY 1, 2025

PROSPECTUS SUPPLEMENT

(To Prospectus dated
May 1, 2025)

FTC SOLAR, INC.

Up to $11,350,576

Common Stock

We have entered into an At the Market Offering Agreement dated as of May 1, 2025 (the “Sales Agreement”) with H.C.
Wainwright & Co., LLC (the “Manager” or “Wainwright”), relating to the sale of shares of our common stock, $0.0001 par value per share (the “common stock”). In accordance with the terms of the Sales Agreement,
from time to time we may offer and sell shares of our common stock through the Manager acting as sales agent and/or principal. Pursuant to this prospectus supplement and the accompanying base prospectus, from time to time we may offer and sell
shares of our common stock having an aggregate offering price of up to $11,350,576.

Sales of our common stock, if any, under this
prospectus supplement and the accompanying base prospectus may be made in sales deemed to be an “at the market offering” as defined in Rule 415(a)(4) promulgated under the Securities Act of 1933, as amended (the “Securities
Act”), including sales made directly on or through the Nasdaq Capital Market (“Nasdaq”), the existing trading market for our common stock, or any other existing