T. Rowe Price Equity Index 500 Fund (PREIX) is a mutual fund that seeks to track the performance of the S&P 500 Index, which measures the investment return of large-capitalization U.S. stocks; the fund invests at least 80% of its net assets in stocks included in the S&P 500 Index and may use derivatives for exposure to the index or associated market risk factors. It offers investors broad exposure to approximately 500 large-cap companies across sectors such as information technology (around 35%), financials (14%), consumer discretionary (11%), and communication services (10%), with top holdings including NVIDIA Corp., Microsoft Corp., and Apple Inc.; the fund maintains a low portfolio turnover of 4%, a net expense ratio of 0.18%, and total assets under management exceeding $33 billion. PREIX serves individual investors, retirement plans, institutions, and financial intermediaries targeting U.S. equity market returns, operating primarily in the United States as part of T. Rowe Price Group, Inc., which was founded in 1937 and is headquartered in Baltimore, Maryland.
The fund, incepted on March 30, 1990, remains focused on its core passive indexing strategy with no reported major strategic shifts, name changes, acquisitions, funding rounds, or new product launches specific to PREIX in the last 1-2 years; it continues to emphasize cost efficiency and close replication of the S&P 500 benchmark. Recent portfolio adjustments reflect standard rebalancing to match the evolving S&P 500 composition, including increased weighting in high-growth technology stocks amid market trends as of mid-2025. T. Rowe Price Group, the fund's sponsor, manages broader operations globally across 17 offices serving clients in 55 countries but maintains PREIX as a U.S.-centric large-blend equity offering.