Starbucks lives their mission through these clear core values.

Tim Cook believes "companies should have values, like people do".  Those values are represented well in the company's Inclusion & Diversity policy.

Johnson & Johnson have encompassed their values into a "credo" to guide their decisions.  It was written in 1943 by a member of the founding family just before the company became public.

INVISIONapp is a superb example of stating (and displaying) their core values.