American Century Small Company Fund Investor Class (ASQIX) is an open-end mutual fund that seeks capital growth and current income by investing primarily in equity securities of small-cap companies. The fund focuses on companies with market capitalizations between $300 million and $2 billion, employing a quantitative investment process that combines fundamental research with proprietary risk models to select undervalued stocks exhibiting strong growth potential, profitability, and financial health. Its portfolio typically includes common stocks, preferred stocks, convertible securities, and derivatives such as futures and options for hedging or efficient portfolio management; sector allocations emphasize industrials, financials, information technology, and consumer discretionary, with holdings diversified across approximately 150-200 small-cap names to mitigate risk. American Century Investments, the fund's investment manager founded in 1958 and headquartered in Kansas City, Missouri, provides a range of actively managed equity, fixed income, and alternative investment products to individual and institutional investors worldwide, operating primarily in the United States with global research capabilities. Recent developments include enhancements to the fund's quantitative models incorporating ESG factors and machine learning for improved alpha generation as of 2024, alongside American Century's strategic acquisition of a majority stake in Red Rock ETF Advisors in early 2025 to expand actively managed ETF offerings complementary to funds like ASQIX.