Strategy. The Parnassus Mid Cap Growth Fund normally invests at least 80% of its net assets (plus borrowings for investment purposes) in mid-sized growth companies. The Fund considers a mid-sized company to be one that has a market capitalization between that of the smallest and largest constituents of the Russell Midcap Growth Index (which was between $2.7 billion and $56.5 billion as of April 30, 2024) measured at the time of purchase. The Fund will not automatically sell or cease to purchase stock of a company it already owns just because the companys market capitalization grows or falls outside the ranges of the Russell Midcap Growth Index, which are subject to change. The Fund may normally invest up to 20% of … Show more… The Parnassus Mid Cap Growth Fund normally invests at least 80% of its net assets (plus borrowings for investment purposes) in mid-sized growth companies. The Fund considers a mid-sized company to be one that has a market capitalization between that of the smallest and largest constituents of the Russell Midcap Growth Index (which was between $2.7 billion and $56.5 billion as of April 30, 2024) measured at the time of purchase. The Fund will not automatically sell or cease to purchase stock of a company it already owns just because the companys market capitalization grows or falls outside the ranges of the Russell Midcap Growth Index, which are subject to change. The Fund may normally invest up to 20% of its net assets in smaller-and larger-capitalization companies. A growth company is a company that the Adviser believes has a superior and pragmatic growth strategy and the potential for above-average revenue and earnings growth. The Fund invests mainly in domestic stocks of companies that are financially sound and have good prospects for the future, and to a lesser extent may also invest in foreign securities of similar companies. The Fund may purchase foreign securities directly on foreign markets. To determine a companys prospects, the Funds investment adviser, Parnassus Investments, LLC (the Adviser) reviews the companys income statement, cash flow statement and balance sheet, and analyzes the companys sustainable strategic advantage and management team. As part of the Advisers investment approach, the Adviser seeks to invest in companies with sustainable business practices, in alignment with our investment philosophy, as we believe these factors are relevant to our assessment of quality and the risk-return profiles of companies in the Funds. The Fund will evaluate whether it will continue to hold or sell a security if the Adviser believes a companys fundamentals will deteriorate, if it believes a companys stock has little potential for appreciation or if the company no longer meets the Advisers sustainable investment expectations and the Adviser does not believe it is an appropriate investment for the Fund following such changes. Show less