F/m Investments has filed with the SEC to tokenize shares of its $6 billion US Treasury 3 Month Bill ETF (TBIL), aiming to maintain ownership records on a permissioned blockchain. This move represents the first regulatory attempt by an ETF issuer to tokenize registered investment company shares without creating a new digital asset. The initiative underscores the growing adoption of tokenization in traditional, regulated funds and aligns with broader market trends toward digital asset integration in securities.