April 14, 2021:
A spokesperson from Amazon reached out to tell Ladders, "We do not, nor have we ever, stack ranked our employees. This is not a practice that Amazon uses."
https://www.theladders.com/career-advice/leaked-amazon-docs-reveal-companies-that-encourage-managers-to-put-employees-down
November 14, 2016: Amazon will drop or significantly alter its existing employee ratings program as part of the changes in the broader review process. Amazon currently uses employee ratings as the basis for a forced curve or “stack-rank” system — also known as “rank-and-yank” — a controversial management technique used by companies to get rid of the lowest-performing employees and identify those with the most growth potential. https://www.geekwire.com/2016/amazon-radically-simplify-employee-reviews-changing-controversial-program-amid-huge-growth/