DISCIPLINED VALUE FUND C CLASS DISCIPLINED VALUE FUND C CLASS, C000016476, ACGCX DISCIPLINED CORE EQUITY FUND INVESTOR CLASS DISCIPLINED CORE EQUITY FUND INVESTOR CLASS, C000016466, BEQGX Style Risk Member Style Risk Member DISCIPLINED CORE EQUITY FUND I CLASS DISCIPLINED CORE EQUITY FUND I CLASS, C000016468, AMEIX Redemption Risk Member Redemption Risk Member DISCIPLINED CORE EQUITY FUND C CLASS DISCIPLINED CORE EQUITY FUND C CLASS, C000016469, AEYCX DISCIPLINED VALUE FUND A CLASS DISCIPLINED VALUE FUND A CLASS, C000016474, AMADX DISCIPLINED CORE EQUITY FUND DISCIPLINED CORE EQUITY FUND, S000005977 Market Risk Member Market Risk Member Russell 1000® Index (reflects no deduction for fees, expenses or taxes) Russell 1000® Index (reflects no deduction for fees, expenses or taxes) DISCIPLINED CORE EQUITY FUND R5 CLASS DISCIPLINED CORE EQUITY FUND R5 CLASS, C000189760, AEYGX DISCIPLINED CORE EQUITY FUND R CLASS DISCIPLINED CORE EQUITY FUND R CLASS, C000016470, AEYRX DISCIPLINED VALUE FUND DISCIPLINED VALUE FUND, S000005979 Russell 1000® Value Index (reflects no deduction for fees, expenses or taxes) Russell 1000® Value Index (reflects no deduction for fees, expenses or taxes) American Century Quantitative Equity Funds Prospectus American Century Quantitative Equity Funds Prospectus Low Dividend Yield Risk Member Low Dividend Yield Risk Member DISCIPLINED VALUE FUND R CLASS DISCIPLINED VALUE FUND R CLASS, C000016477, AICRX DISCIPLINED CORE EQUITY FUND A CLASS DISCIPLINED CORE EQUITY FUND A CLASS, C000016467, BEQAX DISCIPLINED VALUE FUND INVESTOR CLASS DISCIPLINED VALUE FUND INVESTOR CLASS, C000016473, BIGRX Benchmark Correlation Risk Member Benchmark Correlation Risk Member Price Volatility Risk Member Price Volatility Risk Member Investment Process Risk Member Investment Process Risk Member S&P 500® Index (reflects no deduction for fees, expenses or taxes) S&P 500® Index (reflects no deduction for fees, expenses or taxes) DISCIPLINED VALUE FUND R5 CLASS DISCIPLINED VALUE FUND R5 CLASS, C000189761, AICGX DISCIPLINED VALUE FUND I CLASS DISCIPLINED VALUE FUND I CLASS, C000016475, AMGIX