A look at the weighted underlying holdings of the First Trust RBA American Industrial Renaissance ETF (AIRR) shows an impressive 10.4% of holdings on a weighted basis have experienced insider buying within the past six months. Start slideshow:10 ETFs With Stocks That Insiders Are Buying Global Brass & Copper Holdings Inc (BRSS), which makes up 3.25% of the First Trust RBA American Industrial Renaissance ETF (AIRR), has seen 6 directors and officers purchase shares in the past six months, according to the recent Form 4 data.