Vanguard Total Stock Market Index Fund (VTSAX) is a mutual fund offered by The Vanguard Group Inc that seeks to track the performance of the CRSP US Total Market Index, providing broad exposure to the entire investable U.S. stock market. The fund invests in approximately 3,700 common stocks of companies across all market capitalizations, including large-, mid-, small-, and micro-cap stocks; it employs a representative sampling indexing strategy to hold a diversified portfolio mirroring the index's characteristics such as sector allocations and market-cap weightings. Share classes include Admiral Shares (VTSAX) with a minimum investment of $3,000, Investor Shares (VTSMX, now closed to new investors), and Institutional Shares (VITNX); related exchange-traded fund equivalents include Vanguard Total Stock Market ETF (VTI).
The Vanguard Group, founded in 1975 and headquartered in Malvern, Pennsylvania, operates globally with offices in the U.S., Europe, Asia, and Australia, serving individual, institutional, and retirement plan investors worldwide. VTSAX forms part of Vanguard's extensive lineup of low-cost index funds and ETFs targeting passive investment strategies in equities, fixed income, and multi-asset solutions. No significant recent changes such as partnerships, acquisitions, funding rounds, new product launches, or strategic shifts specific to VTSAX have been reported in the last 1-2 years; the fund continues its longstanding passive indexing approach amid Vanguard's ongoing emphasis on cost efficiency and investor-owned structure.