As Kellogg splits its business into three companies, the as-yet-unnamed "Plant Co." is a bit perplexing to financial analysts.

Last week, Kellogg announced that it would be splitting its business into three separate companies, one of them made up of its plant-based brands. Since then, analysts have crunched the numbers and determined that the business, dubbed Plant Co. by Kellogg, is being born into an uncertain world.
While Kellogg’s Morningstar line of plant-based breakfast sausages, burgers…