Is it possible for companies both to maximize financial value and be socially responsible?
It is possible for at least some companies to do this. However, it is not possible for all companies, depending on one's view of what is "socially responsible."
For example, a shoe company like Nike could probably not do both of these things. It would be impossible for Nike to manufacture shoes in the US (socially responsible because it creates American jobs) while still keeping prices low enough to maximize financial value.
But other companies might manage both. For example, a maker of household appliances might be able to maximize financial value even as it makes its appliances more energy efficient, which would be socially responsible.
The answer, then, depends on what products a given company sells and how one defines social responsibility.