The largest institutional shareholder of Best Buy Co., Inc. (NYSE: BBY) is The Vanguard Group, which holds a substantial ownership stake comprising tens of millions of shares valued at over one billion dollars. Other major institutional heavyweights holding significant positions include BlackRock Institutional Trust Company and State Street Global Advisors, alongside prominent individual insiders like founder Richard Schulze. This heavy concentration of institutional ownership ensures long-term stability and liquidity for the company's publicly traded common stock.