Amendment to Schedule 13D Filing for BitVentures Ltd

This filing is an amendment to a Schedule 13D originally filed on March 24, 2025, and amended on November 12, 2025. The amendment reflects several key changes: the issuer's name change from Santech Holdings Limited to BitVentures Limited, the termination of its ADR program and substitution listing on The Nasdaq Capital Market, a reverse share split, and the transfer of ownership and control of Carmel Holdings Limited to The Raku Foundation. Carmel Holdings Limited, incorporated in the British Virgin Islands, is an investment holding company. The Raku Foundation, organized under the laws of the Cayman Islands, is also engaged in investment holdings and philanthropy. As of February 25, 2026, Carmel Holdings Limited holds 5,693,131 ordinary shares of BitVentures Ltd, representing approximately 67.8% of the outstanding shares. This ownership is held through an irrevocable transfer from Mr. Lok to The Raku Foundation for succession planning and philanthropic purposes. The Raku Foundation may be deemed to beneficially own these shares through its control of Carmel Holdings Limited. A joint filing agreement has been executed by Carmel Holdings Limited and The Raku Foundation.