Company: KITTW
Filing Date: 2025-10-24
Form Type: 424B3
Source: 0001849820-25-000253
Chunk: 0

Company: Nauticus Robotics, Inc.
Filing Date: 2025-10-24
Form: 424B3
Chunk 0
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#### Filed Pursuant to Rule 424(b)(3)

#### Registration No. 333-284675

#### PROSPECTUS SUPPLEMENT
(to Prospectus Supplement dated September 15, 2025)

(to Prospectus Supplement dated August 29, 2025)

(to Prospectus Supplement dated July 18, 2025)

(to Prospectus Supplement dated June 30, 2025)

(to Prospectus dated May 29, 2025)

#### Up t

#### o $1,600,000

#### Common Stock

#### NAUTICUS ROBOTICS, INC.
This prospectus supplement is being filed to update, amend, and supplement certain information in the prospectus dated May 29, 2025 as supplemented by the prospectus supplements dated June 30, 2025, July 18, 2025, August 29, 2025 and September 15, 2025. As reported in a current report on Form 8-K filed with the Securities and Exchange Commission on September 5, 2025, and incorporated by reference into this prospectus supplement and the accompanying prospectus, Nauticus Robotics, Inc. (“we” or the “Company”) effected a 1-for-9 reverse stock split of the outstanding shares of the Company's common stock, $0.0001 par value per share (the “common stock”), effective September 5, 2025 (the “Reverse Split”). Unless otherwise indicated herein, all historical share amounts and share price information presented in this prospectus supplement have been proportionally adjusted to reflect the impact of the Reverse Split.

We previously entered into an At The Market Offering Agreement (the “Sales Agreement”), with H.C. Wainwright & Co., LLC, or Wainwright, relating to shares of our common stock offered by this prospectus supplement and the accompanying prospectus. In accordance with the terms of the Sales Agreement, we may now offer and sell shares of our common stock having an aggregate offering price of up to $1,600,000 from time to time through or to Wainwright, acting as agent or principal. From June 30, 2025 through the date hereof, the Company issued and sold 1,182,704 shares on a post-Reverse Split basis (including 951,425 shares issued after the Reverse Split, and 2,081,513 shares issued prior to the Reverse Split, which are equivalent to 231,279 shares on a post-Reverse Split basis)