Company: ATLN
Filing Date: 2025-12-05
Form Type: S-3
Source: 0001213900-25-118830
Chunk: 2

Company: ATLANTIC INTERNATIONAL CORP.
Filing Date: 2025-12-05
Form: S-3
Chunk 2
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 effective on December 8, 2022 (the “Prior Registration Statement”). Pursuant to Rule 415(a)(5)(ii) under the Securities Act, by filing this registration statement on Form S-3, the Company may issue and sell securities covered by the Prior Registration Statement until the earlier of (i) the effective date of this registration statement and (ii) June 6, 2026, which is 180 days after the third-year anniversary of the original effective date of the Prior Registration Statement. Pursuant to Rule 415(a)(6) under the Securities Act, the offering of securities under the Prior Registration Statement will be deemed terminated as of the date of effectiveness of this registration statement.

The information in this prospectus 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 Exchange Commission, of which this prospectus is a part, is effective. This prospectus is not an offer to sell these securities and is not soliciting offers to buy these securities in any jurisdiction where the offer or sale is not permitted.

<div align='center'>PRELIMINARY PROSPECTUS

SUBJECT TO COMPLETION: DATED DECEMBER 5, 2025

$250,000,000

ATLANTIC INTERNATIONAL CORP.

Shares of Common Stock

Shares of Preferred Stock

Senior Debt Securities

Subordinated Debt Securities

Units

Subscription Rights</div>

We may offer from time-to-time shares of our common stock, preferred stock, senior debt securities (which may be convertible into or exchangeable for common stock), subordinated debt securities (which may be convertible into or exchangeable for common stock), warrants, subscription rights and units that include any of these securities. The aggregate initial offeringprice of the securities sold under this prospectus will not exceed $250,000,000. We will offer the securities in amounts, at prices and on terms to be determined at the time of the offering.

Our common stock is listed on the Nasdaq Global Market under the symbol “ATLN.” On December 4, 2025, the last reported sale price prior to the date of this prospectus, of the common stock on the Nasdaq Global Market was $2.28. The Shares may be sold at prevailing market prices or privately negotiated prices or in transactions that are not in the public market.

Each time we offer and sell securities, we will provide a supplement to this prospectus that contains specific