A look at the weighted underlying holdings of the Energy Income ETF (EINC) shows an impressive 15.5% 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 » Western Midstream Partners LP (WES), which makes up 2.05% of the Energy Income ETF (EINC), has seen 5 directors and officers purchase shares in the past six months, according to the recent Form 4 data.