David Einhorn's position in BlackRock Institutional Trust Company N.A. - BTC iShares Silver Trust is currently worth $27.2 Million. That's 2.57% of their equity portfolio (12th largest holding). The investor owns 25.25% of the outstanding BlackRock Institutional Trust Company N.A. - BTC iShares Silver Trust stock. The investor's estimated purchase price is $35 Million, resulting in a loss of 22%.