A look at the weighted underlying holdings of the BDC Income ETF (BIZD) shows an impressive 29.9% 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 » Sixth Street Specialty Lending Inc (TSLX), which makes up 4.76% of the BDC Income ETF (BIZD), has seen 2 directors and officers purchase shares in the past six months, according to the recent Form 4 data.