Petrojack

Petrojack was a Norwegian offshore drilling rig operator. The company had two jackup rigs under order from Jurong Shipyard in Singapore, while it sold its two former rigs "Petrojack I" and "Petrojack III" to Maersk Drilling. The company was founded in 2004 and was listed on the Oslo Stock Exchange the next year. The largest shareholders were Petrolia Drilling (40%), Awilco Offshore (18%) and Sinvest (18%).
Stock Value.
In week 47 2009, Petrojack's stock value went up from 0,90 NOK per share to a maximum of 7,12 NOK per share. On the first day of this extreme rise, at 09:49, the stock was suspended because the share price rose 64% without any statement from the company itself. The stock was reopened 11 minutes later at 10:00.
Bankruptcy.
Petrojack reportedly went bankrupt toward the end of 2010.