X0305 4 2012-02-17 0 0001172139 BILL BARRETT CORP BBG 0001306332 Barron Francis Brian 1099 18TH STREET, SUITE 2300 DENVER CO 80202 0 1 0 0 Executive Vice President Common Stock 2012-02-17 5 J 0 E 292.55 0.00 A 1457.83 I By 401(k) Plan Common Stock 2012-06-14 4 P 0 2000 15.769 A 2000 I By IRA Common Stock 74345 D Common Stock 878 I By minor children The total reported in Column 4 is an aggregate number of the shares acquired as a portion of the Issuer's matching of the Reporting Person's contributions pursuant to the Issuer's 401k) plan. Transactions exempt under Rule 16b-3(c). The shares were received in multiple transactions (dates ranging from February 17, 2012 to March 2, 2012). The Reporting Person undertakes to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares received at each date within the ranges set forth in this footnote. Includes 22,310 shares subject to forfeiture and vesting requirements. /s/ Francis B. Barron 2012-06-14