*Workday shares reach session high $51.32. Oct 12- Shares of Workday Inc. The cloud computing company whose services compete with rivals such as Oracle Corp.
stock listing back in May, the Pleasanton, California- based company opened New York Stock Exchange trading at $48.05. Earlier in the week, Workday raised its price range to $24 to $26 per share from $21 to $24 per share. The IPO values the company, founded by ex-PeopleSoft executives David Duffield and Aneel Bhusri, at almost $4.5 billion.