Mario Gabelli's position in BlackRock Institutional Trust Company N.A. - iShares S&P 500 Growth ETF is currently worth $649 Thousand. That's 0.01% of their equity portfolio (623rd largest holding). The investor owns 25.04% of the outstanding BlackRock Institutional Trust Company N.A. - iShares S&P 500 Growth ETF stock. Mario Gabelli started to build up the position in BlackRock Institutional Trust Company N.A. - iShares S&P 500 Growth ETF in Q2 2019. Since then they sold 400 shares. The stake costed the investor $352 Thousand, netting the investor a gain of 84% so far.