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

This Amendment No. 4 to Schedule 13D, filed by Material Impact Partners II, LLC, Material Impact Fund II, L.P., Adam Sharkawy, and Carmichael Roberts, updates the reporting persons' holdings and percentage ownership in Nauticus Robotics, Inc. following several corporate events. These events include the Series B Preferred Stock financing, a 1-for-9 reverse stock split on September 5, 2025, and a temporary reduction in the conversion price of the September 2023 Term Loans. The amendment reflects a material change in the aggregate percentage ownership reported by the reporting persons. The reporting persons have not purchased or sold any shares of Common Stock since the filing of Amendment No. 3. The filing includes detailed information on the number of shares held, the conversion terms of the Series A Preferred Stock and the September 2023 Term Loans, and the percentage of class securities owned by the reporting persons.