X0101 EFFECT 33 LIVE 2012-02-17 10:00:00

S-3

0000928022 CALLON PETROLEUM CO 333-176811 0001293651 Callon Petroleum Operating CO 333-176811-03 0001293656 Callon Offshore Production, Inc. 333-176811-02 0001293829 Mississippi Marketing, Inc. 333-176811-01