Company: KITTW
Filing Date: 2025-10-28
Form Type: DEFA14A
Source: 0001849820-25-000263
Chunk: 0

Company: Nauticus Robotics, Inc.
Filing Date: 2025-10-28
Form: DEFA14A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### SCHEDULE 14A

#### Proxy Statement Pursuant to Section 14(a)

#### of the Securities Exchange Act of 1934
Filed by the Registrant x

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                                                      |
| x |     | Definitive Additional Materials                                                 |
| ¨ |     | Soliciting Material Pursuant to Section 240.14a-12                              |

#### NAUTICUS ROBOTICS, INC.
<div align='center'>(Name of Registrant as Specified in Its Charter)</div>

Payment of Filing Fee (Check the appropriate box):

| x |     | 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. |

#### Nauticus Robotics, Inc.

#### Supplement to Definitive Proxy Statement

#### regarding Special Meeting of Shareholders

#### on November 21, 2025
The Board of Directors (the “Board”) of the Nauticus Robotics, Inc. (the “Company”) has approved an additional Proposal 3 (the “Supplement”) in the Company’s definitive proxy statement (the “Proxy Statement”) filed with the U.S. Securities and Exchange Commission (the “SEC”) on September 25, 2025 regarding the Special Meeting (the “Special Meeting”) scheduled for November 21, 2025. This Supplement is being filed with the SEC on or about October 27, 2025.

The purpose of the Supplement is to request shareholder approval to increase the number of shares of authorized Common Stock from 625,000,000 to 5,000,000,000. Proposal 3 is hereby added to the agenda of the Special Meeting to read as follows:

After careful consideration, the Board has adopted, declared advisable and directed that there be submitted to the stockholders at the Special Meeting a proposed amendment (the “Authorized Share Amendment”) of our Second Amended and Rest