The Vanguard Group is an American registered investment advisor based in Malvern, Pennsylvania with over $5.3 trillion in assets under management. It is the largest provider of mutual funds and the second-largest provider of exchange-traded funds (ETFs) in the world after BlackRock's iShares. In addition to mutual funds and ETFs, Vanguard offers brokerage services, variable and fixed annuities, educational account services, financial planning, asset management, and trust services.

Founder and former chairman John C. Bogle is credited with the creation of the first index fund available to individual investors, and was a proponent and major enabler of low-cost investing by individuals. Vanguard is structured as a mutual company; it is owned by funds managed by the company, and is therefore owned by its customers. Vanguard offers two classes of most of its funds: investor shares and admiral shares. Admiral shares have slightly lower expense ratios but require a higher minimum investment, often between $10,000 and $100,000 per fund.

In addition to mutual funds and ETFs, Vanguard offers brokerage services, variable and fixed annuities, educational account services, financial planning, asset management, and trust services. Several mutual funds managed by Vanguard are ranked at the top of the list of US mutual funds by assets under management.

Vanguard's corporate headquarters is in Malvern, Pennsylvania, a suburb of Philadelphia. It has satellite offices in Charlotte, North Carolina and Scottsdale, Arizona. The company also has offices in Australia, Asia, and Europe.