Company: ATLN
Filing Date: 2025-12-05
Form Type: S-3
Source: 0001213900-25-118830
Chunk: 33

Company: ATLANTIC INTERNATIONAL CORP.
Filing Date: 2025-12-05
Form: S-3
Chunk 33
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 us at:

<div align='center'>Atlantic International Corp.

270 Sylvan Avenue, Suite 2230

Englewood Cliffs, NJ

Attention: Corporate Secretary

Telephone: (201) 899-4470

S-iv

PROSPECTUS SUPPLEMENT SUMMARY</div>

The following summary is qualified in its entirety by, and should be read together with, the more detailed information and financial statements and related notes thereto appearing elsewhere or incorporated by reference in this prospectus. Before you decide to invest in our securities, you should read the entire prospectus carefully, including the risk factors and the financial statements and related notes included or incorporated by reference in this prospectus.

In this prospectus supplement, unless otherwise noted, the terms “the Company,” “Atlantic,” “we,” “us,” and “our” refer to Atlantic International Corp.

<div align='center'>Overview</div>

Atlantic International Corp. (Nasdaq: ATLN), (“us”,
“we”, the “Group”, or the “Company”), through its subsidiaries, is a national strategic staffing firm
servicing the commercial, professional, finance, direct placement, and managed service provider verticals, Since its formation, the Company
has grown from a regional operation to a national staffing firm with offices and geographic reach across the United States. The Company
primarily places individuals in accounting and finance, administrative and clerical, information technology, legal, light industrial,
and medical roles. The Company is also a leading provider of productivity consulting and workforce management solutions.

We were incorporated in Delaware under the name
SeqLL Inc. on April 1, 2014. On June 13, 2024, the Company changed its name from SeqLL Inc. to Atlantic International Corp. On June
4, 2024 the Company, SeqLL Merger LLC, a Delaware limited liability company and wholly-owned subsidiary of the Company (“Purchaser
Sub”), Atlantic Acquisition Corp, a Delaware corporation (“Atlantic Acquisition”), Atlantic Merger LLC, a Delaware limited
liability company and a majority-owned subsidiary of Atlantic Acquisition (“Atlantic Merger Sub”), Lyneer Investments, LLC,
a Delaware limited liability company (“Lyneer”), and IDC Technologies, a California corporation (“IDC”), entered
into the Merger Agreement pursuant to which (i) Atlantic Merger Sub was merged with and into Lyneer, with Lyneer continuing as the
surviving entity and (ii) Purchaser Sub was merged with and into Lyne