K12 IN TROUBLE: Was Whitney Tilson right about K12? Ever since the hedge fund manager lambasted the online public school provider in Sept. 2013 and declared he was shorting the stock, K12 Inc. has faced a series of setbacks. POLITICO says the company's "academic empire has been in turmoil" as states have shut down--or threatened to close--its schools for delivering poor student outcomes. Agora Cyber Charter School in Pennsylvania, which accounts for 14% of the company's annual revenues, may sever its relationship with K12. The bad news and legal issues are taking their toll: At the time of writing, the publicly traded company (LRN) is trading near an all-time low of $13.05 per share.