https://techcrunch.com/2021/10/29/amazon-reveals-20-stake-in-rivian-ahead-of-ev-makers-ipo/

Amazon disclosed Friday that it owns a 20% stake in Rivian, the electric automaker that filed for an IPO earlier this month.

As of September 30, the e-commerce giant held equity investments, including preferred stock of Rivian that represented about 20% ownership interest, according to the filing. That holding had a “carrying value” of $3.8 billion, up from $2.7 billion as of December 31, 2020.