A coalition of top corporate leaders and financiers is working with Sard Verbinnen & Co. to tout a list of core governance principles and foster a dialog on the subject.

The group includes Mary Barra (General Motors), Warren Buffett (Berkshire Hathaway), Jeff Immelt (General Electric), Jamie Dimon (JPMorgan Chase) and Lowell McAdam (Verizon), among others.

"The health of America’s public corporations and financial markets -- and public trust in both -- is critical to economic growth and a better financial future for American workers, retirees and investors," they wrote in an open letter released today.

The principles include support for "truly" independent corporate boards that include members with diverse skills, backgrounds and experiences, less emphasis on quarterly earnings guidance, and constructive engagement with shareholders.

View the full list at governanceprinciples.org.

Sard principal Mary Popper is guiding PR for the push.