Company: KITTW
Filing Date: 2025-10-24
Form Type: 424B3
Source: 0001849820-25-000253
Chunk: 3

Company: Nauticus Robotics, Inc.
Filing Date: 2025-10-24
Form: 424B3
Chunk 3
---
#### & Co.
<div align='center'>The date of this prospectus supplement is October 24, 2025.

2</div>

### TABLE OF CONTENTS
| ABOUT THIS PROSPECTUS SUPPLEMENT                     |     | S-1  |
| CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS |     | S-2  |
| ABOUT THE COMPANY                                    |     | S-5  |
| THE OFFERING                                         |     | S-6  |
| RISK FACTORS                                         |     | S-7  |
| USE OF PROCEEDS                                      |     | S-10 |
| DIVIDEND POLICY                                      |     | S-11 |
| DILUTION                                             |     | S-12 |
| DESCRIPTION OF COMMON STOCK                          |     | S-14 |
| PLAN OF DISTRIBUTION                                 |     | S-15 |
| LEGAL MATTERS                                        |     | S-16 |
| EXPERTS                                              |     | S-17 |
| WHERE YOU CAN FIND MORE INFORMATION                  |     | S-18 |
| INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE      |     | S-19 |

<div align='center'>1</div>

### ABOUT THIS PROSPECTUS SUPPLEMENT
This prospectus supplement is part of a registration statement that we have filed with the Securities and Exchange Commission, or SEC, utilizing a “shelf” registration process. Under the shelf registration process, we may offer shares of our common stock having an aggregate offering price of up to $1,600,000 from time to time under this prospectus supplement and the accompanying prospectus at prices to be determined by market conditions at the time of offering.

We provide information to you about this offering of shares of our common stock in two separate documents that are bound together: (1) this prospectus supplement, which describes the specific details regarding this offering; and (2) the accompanying prospectus, which provides general information, some of which may not apply to this offering. Generally, when we refer to this “prospectus,” we are referring to both documents combined. If information in this prospectus supplement is inconsistent with the accompanying prospectus, you should rely on this prospectus supplement. However, if any statement in one of these documents is inconsistent with a statement in a document having a later date incorporated by reference in this prospectus, the statement in the document incorporated by reference modifies or supersedes the earlier statement as our business, financial condition, results of operations