Almost a year ago, we published a case study looking at the corporate break-up of the venerable Kellogg Company into two separate businesses: Kellanova (snack foods) and WK Kellogg (breakfast cereals). From the announcement through the present, Kellogg shareholders have earned an annualized total return of 11.2%, far outpacing the returns of peer publicly traded packaged foods companies. Last year’s post included five takeaways for family business directors. In this week’s post, we reit...