The first example is a stack of five benzene molecules, at varying inter-molecular distances, which illustrates the applicability of Stochastic-GASSCF to fragment based chemical systems. The second example uses Stochastic-GASCI to perform a very large uncontracted stochastic MRCISD calculation that correlates 96 electrons and 159 orbitals, and uses a large CAS (32, 34) active space reference wave function, for an Fe(II)-porphyrin model system, and demonstrates how our algorithm can be used to account for dynamic correlation effects. With this example, we also demonstrate that dynamic orrelation effects outside the CAS (32, 34) further stabilize the 3 E g over the A 1g spin state. In a third test case application, the Stochastic-GASCI strategy has been utilized to investigate the low-energy spin ladder of an Fe 4 S 4 cubane cluster. We show how the GAS strategy can be applied towards the understanding of the two competing spin-exchange and charge-transfer correlating mechanisms in stabilizing different spin-states.