Company: ATLN
Filing Date: 2025-12-10
Form Type: S-3/A
Source: 0001213900-25-120180
Chunk: 2

Company: ATLANTIC INTERNATIONAL CORP.
Filing Date: 2025-12-10
Form: S-3/A
Chunk 2
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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 10, 2025

$250,000,000

ATLANTIC INTERNATIONAL CORP.

Shares of Common Stock

Shares of Preferred Stock

Warrants

Subscription Rights

Units</div>

We may offer from time-to-time shares of our
common stock, preferred stock, warrants, subscription rights and units that include any of these securities. The aggregate initial offering
price 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 9, 2025, the last reported sale price prior to the date of this prospectus, of
the common stock on the Nasdaq Global Market was $1.66. 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 information about the offering and the amounts, prices and terms of the securities. The supplement may also add, update or change information contained in this prospectus with respect to that offering. You should carefully read this prospectus, the applicable prospectus supplement, as well as the documents incorporated or deemed to be incorporated by reference herein or therein, before you purchase any of our securities.

We may offer and sell the securities described in this prospectus and any prospectus supplement to or through one or more underwriters, dealers and agents, or directly to purchasers, or through a