X0306 4 2012-12-17 0000798949 UNIT CORP UNT 0001012071 NIKKEL JOHN G 7130 SOUTH LEWIS SUITE 1000 TULSA OK 74136 1 Common Stock 2012-12-17 4 S 0 29000.0000 44.5300 D 54849.0000 D Common Stock 35000.0000 I By Spouse This transaction was executed in multiple trades at prices ranging from $44.49 to $44.58, inclusive. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide to Unit Corporation, any security holder of Unit Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the stated range. By April Adler under POA 2012-12-18