Company: KITTW
Filing Date: 2025-01-17
Form Type: 424B3
Source: 0001849820-25-000036
Chunk: 2

Company: Nauticus Robotics, Inc.
Filing Date: 2025-01-17
Form: 424B3
Chunk 2
---
 Investors subscribed for Debentures in an aggregate principal amount of $36,530,320. In exchange for such subscriptions, Nauticus delivered to such Selling Securityholders (i) a Debenture with a principal amount equal to such Selling Securityholder’s subscription amount and (ii) SPA Warrants.

This prospectus supplement updates and supplements the information in the Prospectus and is not complete without, any may not be delivered or utilized except in combination with, the Prospectus, including any amendments or supplements thereto. This prospectus supplement should be read in conjunction with the Prospectus and if there is any inconsistency between the information in the Prospectus and this prospectus supplement, you should rely on the information in this prospectus supplement.

Our Common Stock is listed on the Nasdaq Stock Market LLC under the symbol “KITT.” On January 16, 2025, the closing price for our Common Stock was $2.22 per share.

We are an “emerging growth company” as defined under the federal securities laws and, as such, have elected to comply with certain reduced public company reporting requirements.

Investing in our securities involves risks that are described in the “Risk Factors” section beginning on page 12 of the Prospectus. Neither the SEC nor any state securities commission has approved or disapproved of the securities to be issued under the Prospectus or determined if the Prospectus or this prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

<div align='center'>The date of this prospectus supplement is January 17, 2025.</div>

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM 8-K

### CURRENT REPORT

#### PURSUANT TO SECTION 13 OR 15(d) OF THE

#### SECURITIES EXCHANGE ACT OF 1934
<div align='center'>Date of Report (Date of earliest event reported):</div>

#### January 15, 2025

#### NAUTICUS ROBOTICS, INC.
<div align='center'>(Exact name of registrant as specified in its charter)</div>

| Delaware                     |     | 001-40611               |     | 87-1699753         |
| (State or other jurisdiction 
 of incorporation)            |     | -Commission File Number |     | -IRS Employer      
 Identification No. |

<div align='center'>17146 Feathercraft Lane, Suite 450, Webster,