All the managers in the org get into days long meetings where they duke it out over who gets what ratings because everyone is stack ranked.

Then a chosen few are told their top tier and can continue to get stocks (assuming the stock hasn't grown since the last time the got stocks, we're owners so growth is all we need. Or assuming the stock hasn't fallen, we're owners so we need to help the trillion dollar company. Or assuming they've not been top tier too many years in a row), and the unlucky few, get put into the pipeline for "unregretted attrition" and are a feather in the managers hat when they're forced out.