Company: KITTW
Filing Date: 2025-06-30
Form Type: 424B3
Source: 0001849820-25-000159
Chunk: 21

Company: Nauticus Robotics, Inc.
Filing Date: 2025-06-30
Form: 424B3
Chunk 21
---
29, 2025;                                                                                                                                                                                                                                                    |
| ● |     | our Current Reports on Form 8-K filed with the SEC on January 6, 2025, January 14, 2025, January 15, 2025, January 17, 2025, January 29, 2025, February 20, 2025, March 5, 2025, March 19, 2025, March 25, 2025 (as amended on May 29, 2025), April 2, 2025 and June 25, 2025;                                                           |
| ● |     | the description of our securities which is contained in a Registration Statement on Form 8-A filed on July 14, 2021 under the Exchange Act, including any amendments or reports filed for the purpose of updating such description, including Exhibit 4.8 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2023. |

We also incorporate by reference into this prospectus supplement all reports and documents that we may file with the SEC under Sections 13(a), 13(c), 14, or 15(d) of the Exchange Act after the date of this prospectus supplement but prior to the termination of the offering of the common stock hereunder, but excluding any information deemed furnished and not filed with the SEC, and such reports and documents are an important part of this prospectus supplement.

<div align='center'>S-19</div>

#### PROSPECTUS
<div align='center'>$100,000,000 Common Stock Preferred Stock</div>

#### Depositary Shares

#### Warrants

#### Rights

#### Units

#### NAUTICUS ROBOTICS, INC.
We may offer and sell up to $100,000,000 of the securities described in this prospectus from time to time in one or more transactions. This prospectus describes the general terms of these securities and the general manner in which these securities will be offered. We will provide the specific terms of these securities in supplements to this prospectus. The prospectus supplements will also describe the specific manner in which these securities will be offered and may also supplement, update, or amend information contained in this prospectus. You should read this prospectus and any applicable prospectus supplement, as well as the documents incorporated or deemed to be incorporated by reference herein or therein, before you invest. We may offer these securities in amounts, at prices, and on terms