Renren (NYSE: RENN), the Chinese social networking company once heralded as the "Facebook of China," sold most of its core businesses over the past three years. Renren's stock seemed destined to be delisted, but it rebounded to $10 per share back in February, then continued climbing to the mid-$20s earlier this month. The main catalyst for that rally was the settlement of an investor-backed lawsuit, which started after Renren sold its most valuable investments in 2018.