For two classic examples that are literally the subject of business school case studies, see Beatrice Foods (https://en.wikipedia.org/wiki/Beatrice_Foods https:

For two classic examples that are literally the subject of business school case studies, see Beatrice Foods (https://en.wikipedia.org/wiki/Beatrice_Foods https://en.wikipedia.org/wiki/Beatrice_Foods) and more recently the conglomerate that is/was Altria (https://en.wikipedia.org/wiki/Altria https://en.wikipedia.org/wiki/Altria).