new york billionaire investor george soros bought nearly 20 million shares of electric truck startup rivian automotive inc in the quarter ended dec 31 securities filings showed friday the 19835761 shares worth about 2 billion at the time makes soros fund management among the most prominent investors in the company rivian which is 20 owned by amazoncom inc is expected to provide the ecommerce company with more than 100000 electric trucks irvine californiabased rivian said in december it expected production to fall a few hundred vehicles short of its 2021 target of 1200 due to supply chain constraints highlighting the likely challenges in ramping up production to take on ev leader tesla inc shares of rivian fell 9 friday and are down 43 for the year to date the stock price is down 67 from the high of 17946 it touched on nov 16 less than a week after it raised 12 billion in the largest stock debut of 2021