Company: NSTS
Filing Date: 2025-04-11
Form Type: DEF 14A
Source: 0001437749-25-011792
Chunk: 0

Company: NSTS Bancorp, Inc.
Filing Date: 2025-04-11
Form: DEF 14A
Chunk 0
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934
(Amendment No. )</div>

| Filed by the Registrant ☒ | Filed by a Party other than the Registrant ☐ |

Check the appropriate box:

| ☐ | Preliminary Proxy Statement |

| ☐ | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |

| ☒ | Definitive Proxy Statement |

| ☐ | Definitive Additional Materials |

| ☐ | Soliciting Material Pursuant to §240.14a-12 |

<div align='center'>NSTS Bancorp, Inc.
(Name of Registrant as Specified In Its Charter)

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

Payment of Filing Fee (Check the appropriate box):

| ☒ | No fee required. |

| ☐ | Fee paid previously with preliminary materials. |

| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

<div align='center'>NSTS Bancorp, Inc.
700 S. Lewis Ave.
Waukegan, Illinois 60085
(847) 336-4430</div>

April 11, 2025

Dear Fellow Stockholder:

The 2025 Annual Meeting of Stockholders of NSTS Bancorp, Inc. will be held at the office of North Shore Trust and Savings at 700 S. Lewis Ave., Waukegan, Illinois on Wednesday, May 21, 2025, at 10:00 a.m., Central Time.

We are furnishing our proxy statement, 2024 Annual Report and proxy card to stockholders over the internet. Our stockholders will receive a notice in the mail which contains instructions on how to access the proxy materials via the internet. By delivering proxy materials electronically to our stockholders, we can reduce the costs of printing and mailing our proxy materials. If you would like to request paper copies of the proxy materials, please follow the instructions on the notice or as provided in the proxy statement.

The Notice of Annual Meeting and Proxy Statement describe the formal business to be transacted at the annual meeting. Our