Principal U.S. Mega-Cap ETF ETF

Under normal circumstances, the fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in equity securities of U.S. companies with very large ("mega") market capitalizations at the time of purchase. For this fund, companies with mega capitalizations are those with market capitalizations in the top 50th percentile of the S&P 500 Index at the time of purchase. The fund is non-diversified.