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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13D/A 0001594543-25-000002 0001594543 XXXXXXXX LIVE 4 Common Stock 08/11/2025 false 0001849820 63911H207 Nauticus Robotics, Inc. 17146 FEATHERCRAFT LANE 17146 FEATHERCRAFT LANE WEBSTER TX 77598 William Kerber 405-373-6600 3917 NE 104TH ST Oklahoma City OK 73131 0001594543 N KERBER WILLIAM XAVIER III PF N OK 1852696.00 0.00 1852696.00 0.00 1852696.00 N 4.4 IN Common Stock Nauticus Robotics, Inc. 17146 FEATHERCRAFT LANE 17146 FEATHERCRAFT LANE WEBSTER TX 77598 WILLIAM XAVIER KERBER III 3917 NE 104TH ST Oklahoma City, OK. 73131 CEO Human Mode LLC 3917 NE 104TH ST Oklahoma City, OK. 73131 During the past 5 years, Mr. Kerber has not been convicted in any criminal proceeding (excluding traffic violations or similar misdemeanors). During the past 5 years, Mr. Kerber has not been a party to any civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding such person was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. United States All of the shares of Common Stock were acquired using Mr. Kerber's personal funds. No loans were involved in these purchases. As of the Issuer's recent 10-Q filing dated August 11, 2025 the Issuer stated total outstanding Common Stock of 42,267,643 shares. Mr. Kerber beneficially owns 1,852,696 shares or 4.4% of of the Issuer's outstanding Common Stock and has ceased to be a beneficial owner of five percent or more as of the date of the Issuer's 10-Q filing dated August 11, 2025. As of the date of this Amendment No. 4, Mr. Kerber beneficially owns 1,852,696 shares or 4.4% of the Issuer's outstanding shares of Common Stock. The beneficial ownership percentages used in this Schedule are calculated based on the 42,267,643 shares of Common Stock of the Issuer outstanding as stated in the Issuer's recent 10-Q filing dated August 11, 2025. As of the date of this Amendment No. 4, Mr. Kerber has sole voting and dispositive power of the 1,852,696 shares or 4.4 % of the Issuer's Common Stock. Mr. Kerber has not effected any transactions in the Common Stock during the past 60 days or since his most recent Schedule 13D filing dated April 10, 2025. Mr. Kerber ceased to be a beneficial owner of five percent or more of the Issuer's Common Stock as of the Issuer's most recent 10-Q filing dated August 11, 2025. As of the filing date of this Amendment, Mr. Kerber is not involved in any contracts, arrangements, under standings or relationships related to any securities of the Issuer. KERBER WILLIAM XAVIER III WILLIAM XAVIER KERBER III WILLIAM XAVIER KERBER III 08/13/2025