The $0.22 share price you mentioned is reflective of CELG's forward stock splits. They IPO'd in 1987. They have since split their stock in 2000, 2004, 2006, and 2014. So looking back at the chart over the years, the share prices have been adjusted for the forward splits.
Having said that, though, this is an interesting website showing what one's investments would have looked like over time in CELG: www.1stock1.com/1stock1_1844.htm
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