T. Rowe Price All-Cap Opportunities Fund - I Class (PNAIX) is an actively managed open-end mutual fund that seeks long-term capital growth by investing across the entire market capitalization spectrum, including large-cap, mid-cap, and small-cap equities. The fund employs a bottom-up fundamental research process to identify companies with sustainable competitive advantages, attractive valuations, and strong growth prospects; it maintains a diversified portfolio typically comprising 50 to 80 stocks, with sector allocations guided by bottom-up stock selection rather than strict benchmarks. Core holdings span growth and value-oriented equities in sectors such as technology, healthcare, consumer discretionary, financials, and industrials; the fund offers daily liquidity, automatic investment plans, and retirement account compatibility for institutional and individual investors. Managed by T. Rowe Price Group, Inc., founded in 1937 and headquartered in Baltimore, Maryland, the fund operates primarily in the United States with global exposure through multinational companies; it is part of T. Rowe Price Associates, Inc., the firm's investment advisory subsidiary. Recent developments include the appointment of new portfolio managers in 2024 to enhance the team's expertise in small- and mid-cap opportunities amid market volatility; the fund benefited from T. Rowe Price's strategic expansion into ESG integration across equity strategies in late 2023, incorporating environmental, social, and governance factors into its research process without altering its core growth mandate. In 2025, the fund participated in T. Rowe Price's broader fee reductions for select equity funds to remain competitive, alongside increased allocations to AI-driven technology firms reflecting portfolio adjustments to capitalize on sector tailwinds.