Vanguard Group’s Mid-Cap Index Fund Institutional Shares (VMCIX) has disclosed holding 2.91 million shares of MicroStrategy, valued at approximately $505 million. The revelation, dated January 16 and reported by BitcoinTreasuries.NET, underscores Vanguard’s significant exposure to a Bitcoin-linked company. Vanguard’s asset management division oversees about $12 trillion, making this a notable allocation within its diversified holdings.