The first half of the year has brought a handful of new firms to the ETF market, looking to enter the growing exchange-traded fund sector where they have yet to stake claim, IndexUniverse reports.

The ETF market continues to grow, now boasting more than $1.5 trillion in assets spread across some 1,400 U.S.-listed ETFs.

As an industry, ETFs are growing at a quicker pace than any other financial instrument, and more and more firms are taking notice, including widely known names such as USAA, mutual fund firms such as Calamos, as well as a number of smaller registered advisors such as ERNY and Artivest.