It depends on which company, and the nature of company.
Many times, struggle for company ownership has resulted in rift between married couples (starting at an individual level going all the way to a country level), especially those couples that had marriage of convenience.
Here is one example -
http://www.afr.com/opinion/when-the-uschina-economic-marriage-of-convenience-breaks-down-20150929-gjx6af
Originally shared by GA Brown