It's a mistake to treat corporations like people (no matter what the SCOTUS has to say on the matter). Corporations are just the people who work there. And none of the people involved with Agent Orange are working on GMOs today. They have nothing to do with one another.

Besides, Monsanto long ago spun off their chemical division as Solutia. We're not even talking about the same company.

In the end, you're confusing the name of something with the actual something.