Fusion-io ( FIO) Fusion-io, which makes products that improve data center efficiency, scored big in its June IPO. The company, whose biggest customer is Facebook, priced its offering at $19, north of its projected range of $16 to $18 a share. Shares closed Friday at $29.33. In its most recently quarter, ended in September, the company reported revenue of $75 million, almost double its sales from the same period last year. Earlier in November, Fusion-io said it will offer 3 million common shares as part of a secondary offering. In a previous article, Jonas Elmerraji pointed to Fusion-io's potential to get squeezed higher due to its short interest, writing that the company "has been generating consistent growth and admirable profitability in the last few years -- and its offering left it with a massive hoard of cash and no debt. The huge percentage of FIO's equity float that's currently short provides an excellent catalyst for a meaningful short squeeze."