Strategy. The Fund invests primarily in equity securities of a limited number of large, carefully selected, high-quality U.S. companies. The Fund invests primarily in the domestic equity securities of companies selected by AllianceBernstein L.P. (AllianceBernstein) for their growth potential within various market sectors. The Fund emphasizes investments in large, seasoned companies. Under normal circumstances, the Fund will invest at least 80% of its assets in common stocks of large-capitalization growth companies. For these purposes, large-capitalization companies are those that, at the time of investment, have market capitalizations within the range of market capitalizations of companies appearing in the Russell 1000 Growth Index. While the market capitalizations of companies in the Russell 1000 Growth Index ranged from approximately $677 million to $3.34 … Show more… The Fund invests primarily in equity securities of a limited number of large, carefully selected, high-quality U.S. companies. The Fund invests primarily in the domestic equity securities of companies selected by AllianceBernstein L.P. (AllianceBernstein) for their growth potential within various market sectors. The Fund emphasizes investments in large, seasoned companies. Under normal circumstances, the Fund will invest at least 80% of its assets in common stocks of large-capitalization growth companies. For these purposes, large-capitalization companies are those that, at the time of investment, have market capitalizations within the range of market capitalizations of companies appearing in the Russell 1000 Growth Index. While the market capitalizations of companies in the Russell 1000 Growth Index ranged from approximately $677 million to $3.34 trillion as of March 31, 2025, the Fund normally will invest in common stocks of companies with market capitalizations of at least $5 billion at the time of purchase. AllianceBernstein expects that normally the Funds portfolio will tend to emphasize investments in securities issued by U.S. companies, although it may invest in foreign securities. AllianceBernstein allocates the Funds investments among broad sector groups based on fundamental company research, assessing the current and forecasted investment opportunities and conditions, as well as diversification and risk considerations. AllianceBernstein may vary the percentage allocations among market sectors and may change the market sectors in which the Fund invests as companies potential for growth within a sector matures and new trends for growth emerge. AllianceBernsteins research focus is in companies with high sustainable growth prospects, high or improving return on invested capital, transparent business models, and strong and lasting competitive advantages. The Fund may, at times, invest in shares of exchange-traded funds (ETFs) in lieu of making direct investments in securities. ETFs may provide more efficient and economical exposure to the types of companies and geographic locations in which the Fund seeks to invest than direct investments. The Fund may enter into derivatives transactions, such as options, futures contracts, forwards and swaps. The Fund may use options strategies involving the purchase and/or writing of various combinations of call and/or put options, including on individual securities and stock indices, futures contracts (including futures contracts on individual securities and stock indices) or shares of ETFs. These transactions may be used, for example, in an effort to earn extra income, to adjust exposure to individual securities or markets, or to protect all or a portion of the Funds portfolio from a decline in value, sometimes within certain ranges. The Funds investments include holdings in privately held companies and companies that only recently began to trade publicly (the Private Placement Sleeve). The Funds Private Placement Sleeve is managed by T. Rowe Price Associates, Inc. (T. Rowe Price). Securities held in the Private Placement Sleeve were purchased pursuant to a previous investment strategy of the Fund and are being held pending favorable conditions for divestment. The Fund does not intend to invest in additional privately placed securities. The Fund is non-diversified for purposes of the Investment Company Act of 1940, and as a result may invest a greater percentage of assets in a particular issuer than a diversified fund. Show less