Company: ATLN
Filing Date: 2025-11-04
Form Type: DEF 14A
Source: 0001605888-25-000046
Chunk: 0

Company: ATLANTIC INTERNATIONAL CORP.
Filing Date: 2025-11-04
Form: DEF 14A
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### SCHEDULE 14A
<div align='center'>(RULE 14a-101)</div>

### INFORMATION REQUIRED IN

### PROXY STATEMENT

#### SCHEDULE 14A INFORMATION

#### Proxy Statement Pursuant to Section 14(a) of
<div align='center'>the Securities Exchange Act of 1934 (Amendment No. __)</div>

Filed by the Registrant x

Filed by a Party other than the Registrant o

Check the appropriate box:

| o |     | Preliminary Proxy Statement                                                     |
| o |     | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| o |     | Definitive Proxy Statement                                                      |
| x |     | Definitive Additional Materials                                                 |
| o |     | Soliciting Material under §240.14a-12                                           |

| ATLANTIC INTERNATIONAL CORP.                     |
| (Name of Registrant as Specified In Its Charter) |

<div align='center'>(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</div>

Payment of Filing Fee (Check the appropriate box):

| x |     | No fee required.                                                         |
| o |     | Fee paid previously with preliminary materials                           |
| o |     | Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11. |

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

#### About Atlantic International Corp.
About Atlantic International Corp. (“Atlantic” or the “Company”) is a leading provider of strategic staffing, outsourced services, and workforce solutions. Through its subsidiaries, Atlantic serves clients across multiple industries with comprehensive talent acquisition, workforce management, and strategic consulting services. The Company is committed to delivering innovative solutions that combine advanced technology with deep industry expertise.

#### Important Shareholder Information
The Company will hold its Annual Meeting of Stockholders (the “AGM”) on November 7, 2025. As previously disclosed on a Current Report on Form 8-K filed by the Company with the U.S. Securities and Exchange Commission (the “SEC”) on October 31, 2025, the Company announced that the Company’s Board of Directors, approved an amendment (the “Amendment”) to the Bylaws of the Company (the “Amended and Restated Bylaws”). Effective immediately