Metaplanet share price (Source: Google Finance)Bitcoin is down almost 3% in the past month. Morgan Stanley Is The Biggest ShortMorgan Stanley MUFG has the largest short position on the Bitcoin stacking company, holding nearly 20 million Metaplanet shares in its position. Institutional Short Position ( Metaplanet 3350 ) Analysis ,Sep 11,2025 1. Largest short holder: Morgan Stanley MUFG with nearly 20 million shares (2.83%), adding 1.92M shares. Similarly, JP Morgan and Citigroup slashed their order sizes by 4 million and 9 million shares, respectively.