Retail investors ‘celebrate’ Ken Griffin’s birthday in their own way By: MarketWatch October 15, 2021 at 17:05 PM EDT Reddit's 'Apes' tried to give the Citadel founder a short squeeze for his 53rd, but gave themselves some nice gains on AMC stock. Read More >> Related Stocks: AMC Entertainment Holdings Bed Bath & Beyond Blackberry Ltd Express Inc GameStop Corp NVIDIA Corp Nokia Corp ADR