Koizumi Shinichi (小泉 信一) filed a report with the regional finance bureau on a new holding of MabGenesis shares. The updated holding ratio was 6.29%, confirming that it exceeded 5%.
Koizumi Shinichi (小泉 信一) newly filed a Large Shareholding Report with the regional finance bureau dated 6 November 2026 concerning MabGenesis shares listed on the TSE Growth market. The report stated that the shares were held as a stable shareholding for the purpose of participating in management as a founding shareholder and director of the issuing company.
According to the report, Koizumi Shinichi's (小泉 信一) holding in MabGenesis reached 6.29%, exceeding the 5% rule. The transaction date triggering the reporting obligation was 2 November 2026.