This is a difficult question, as the reality is that many companies do little or no business in the rain forest at all. However, a number of Fortune 500 companies are supporting efforts towards rainforest sustainability, although whether this is honest effort or a form of greenwashing will have to be left up to your own judgment. But the fact that the Rainforest Alliance garnered $1,849,914 from donations, and another $5,756,257 from corporate grants and foundations shows that green washing or not, the funds are ending up in the right place.

I hope this helps!