Amendment No. 4 to Schedule 13D for Nauticus Robotics, Inc.

This Amendment No. 4 to Schedule 13D, filed by Material Impact Partners II, LLC and related entities, updates the ownership details of Nauticus Robotics, Inc. following a Series B Preferred Stock financing and a 1 for 9 reverse stock split on September 5, 2025. The amendment reflects changes in the percentage ownership due to these events and a temporary reduction in the conversion price of the September 2023 Term Loans. The Reporting Persons have not purchased or sold any shares of Common Stock since the last amendment. The filing includes detailed information on the current holdings, conversion terms, and percentage ownership of the Reporting Persons.