A look at the weighted underlying holdings of the Vanguard S&P Small-Cap 600 Growth ETF (VIOG) shows an impressive 12.3% 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 » eHealth Inc (EHTH), which makes up 0.55% of the Vanguard S&P Small-Cap 600 Growth ETF (VIOG), has seen 3 directors and officers purchase shares in the past six months, according to the recent Form 4 data.