Strategy. Principal Investment Strategies The Fund invests primarily in large-capitalization companies that the Funds subadviser, Loomis, Sayles & Company, L.P. (Loomis Sayles), believes offer the potential for long-term growth. Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in the common stocks of companies whose market capitalizations at the time of purchase are within the market capitalization range of companies included in the Russell 1000 Growth Index (as of February 28, 2025, $555.98 million to $2.89 trillion). The Fund has the flexibility to invest in companies of any size, including small-capitalization companies (when Loomis Sayles believes such companies to be especially attractive). The Fund typically invests most of … Show more… Principal Investment Strategies The Fund invests primarily in large-capitalization companies that the Funds subadviser, Loomis, Sayles & Company, L.P. (Loomis Sayles), believes offer the potential for long-term growth. Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in the common stocks of companies whose market capitalizations at the time of purchase are within the market capitalization range of companies included in the Russell 1000 Growth Index (as of February 28, 2025, $555.98 million to $2.89 trillion). The Fund has the flexibility to invest in companies of any size, including small-capitalization companies (when Loomis Sayles believes such companies to be especially attractive). The Fund typically invests most of its assets in equity securities of U.S. companies, but may invest up to 20% of its total assets in foreign securities and American Depositary Receipts (ADRs), including emerging market securities. Equity securities may include common stocks, preferred stocks, securities convertible into common or preferred stock, rights, and warrants. The Fund will normally be invested in 30 40 securities. The Fund may at times have significant exposure to one or more issuers, industries, or sectors. The Fund may hold a portion of its assets in cash or cash equivalents. The Fund is non-diversified, which means that it may hold larger positions in a smaller number of issuers than a diversified fund. In selecting securities, Loomis Sayles emphasizes companies with sustainable competitive advantages versus others, long-term structural growth drivers that will lead to above-average future cash flow growth, attractive cash flow returns on invested capital, and management teams focused on creating long-term value for shareholders. Loomis Sayles aims to invest in companies when they trade at a significant discount to Loomis Sayles estimate of intrinsic value (i.e., companies with share prices trading significantly below what Loomis Sayles believes the share price should be). Loomis Sayles will consider selling a portfolio investment when (i) it believes an unfavorable structural change occurs within a given business or the markets in which it operates, (ii) a critical underlying investment assumption is flawed, (iii) a more attractive reward-to-risk opportunity becomes available, (iv) the current price fully reflects intrinsic value, or (v) for other investment reasons which it deems appropriate. Show less