First Trust Water ETF (FIW) Exchange: NYSE ARCA

The Fund will normally invest at least 90% of its net assets (including investment borrowings) in common stocks that comprise the Index. The Fund, using an indexing investment approach, attempts to replicate, before fees and expenses, the performance of the Index. The Fund's investment advisor seeks a correlation of 0.95 or better (before fees and expenses) between the Fund's performance and the performance of the Index; a figure of 1.00 would represent perfect correlation.The Index is developed and owned by the International Securities Exchange, LLC ("ISE"), and is calculated and maintained by Nasdaq. The Index is a modified market-capitalization weighted portfolio of 36 stocks of companies as of March 29, 2018 that derive a substantial portion of their revenues from the potable and wastewater industries, which are generally industrial and utilities companies. The components of the Index are adjusted so that the weights conform to the following schedule:Assign weights of 4.0% to stocks 1–10;Assign weights of 3.5% to stocks 11–15;Assign weights of 3.0% to stocks 16–20;Assign weights of 2.0% to stocks 21–30; andEqually distribute weights among remaining stocks.The inception date of the Index was November 20, 2006. The Fund holds non-U.S. securities that are either directly listed on a U.S. securities exchange or in the form of depositary receipts. The Fund may also invest in securities of companies located in, or with significant operations in, emerging market countries. The Index includes the securities of small and mid cap companies.