FIRST TR EXCH TRADED ALPHADEX FD MID CAP GROWTH ALPHADEX FD

The First Trust Mid Cap Growth AlphaDEX® Fund is an exchange-traded fund. The investment objective of the Fund is to seek investment results that correspond generally to the price and yield, before the Fund's fees and expenses, of an equity index called the NASDAQ AlphaDEX® Mid Cap Growth Index. The NASDAQ AlphaDEX® Mid Cap Growth Index is an “enhanced” index created and administered by Nasdaq, Inc. (“Nasdaq”) which employs the AlphaDEX® stock selection methodology to select stocks from the NASDAQ US 600 Mid Cap Growth Index that meet certain criteria.