The news flies in the face of most people's perception of Vole as the most ruthless outfit in the world, one which would sell its own grandmother for medical experiments if it thought it could make a bob or two.
The Ethisphere Institute is "a leading international think-tank dedicated to the creation, advancement and sharing of best practices in business ethics, corporate social responsibility, anti-corruption and sustainability."
It says that its list looks at companies that truly go beyond, making statements about doing business "ethically" and translate those words into action.
"WME honorees not only promote ethical business standards and practices internally, they exceed legal compliance minimums and shape future industry standards by introducing best practices today," its web site says.
So it looks like Microsoft has put its past behind it and has become a good Vole. One thing that is telling is that Apple, which markets itself as ethical, clean and green, did not even make the list.