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

Company: ATLANTIC INTERNATIONAL CORP.
Filing Date: 2025-12-10
Form: S-3/A
Chunk 3
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 combination of these methods. These securities also may be resold by selling securityholders. If any underwriters, dealers or agents are involved in the sale of any of the securities, their names and any applicable purchase price, fee, commission or discount arrangement between or among them will be set forth, or will be calculable from the information set forth, in an applicable prospectus supplement. See the sections of this prospectus entitled “About this Prospectus” and “Plan of Distribution” for further information.

No securities may be sold without delivery of this prospectus and the applicable prospectus supplement describing the method and terms of the offering of such securities.

Investing in our securities is highly speculative and involves a high degree of risk. You should carefully read and consider the “Risk Factors” beginning on page 9 of this prospectus before investing.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

<div align='center'>The date of this prospectus is December
[ ], 2025.</div>

We are an “emerging growth company” and a “smaller reporting company” under the federal securities laws and, as such, we have elected to comply with certain reduced public company reporting requirements for this prospectus supplement. See “Prospectus Supplement Summary—Implications of Being an Emerging Growth Company and a Smaller Reporting Company.”

<div align='center'>TABLE OF CONTENTS</div>

| EXPLANATORY NOTE                          |     |
| ABOUT THIS PROSPECTUS                     |  ii |
| CAUTIONARY NOTE REGARDING FORWARD-LOOKING 
 STATEMENTS                                | iii |
| WHERE YOU CAN FIND MORE INFORMATION,      
 INCORPORATION BY REFERENCE                |  iv |
| PROSPECTUS SUMMARY                        |   1 |
| USE OF PROCEEDS                           |   3 |
| PLAN OF DISTRIBUTION                      |   3 |
| DESCRIPTION OF SECURITIES                 |   5 |
| DESCRIPTION OF COMMON STOCK               |   5 |
| DESCRIPTION OF PREFERRED STOCK            |   7 |
| DESCRIPTION OF WARRANTS                   |   8 |
| DESCRIPTION OF RIGHTS                     |  10 |
| DESCRIPTION OF UNITS                      |  11 |
| DIVIDEND POLICY                           |  12 |
| LEGAL MATTERS                             |  12 |
| EXPERTS                                   |  12 |

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