X0306 4 2013-03-12 0000007332 SOUTHWESTERN ENERGY CO SWN 0001103813 KERLEY GREGORY D SUITE 125 2350 N. SAM HOUSTON PARKWAY EAST HOUSTON TX 77032 1 Common Stock 2013-03-12 4 M 0 19391 20.335 A 352991 D Common Stock 2013-03-12 4 S 0 19391 37.6904 D 333600 D Common Stock 2013-03-12 4 S 0 135750 37.7161 D 14000 I by Charitable Remainder Trust #3; Greg D. Kerley, Trustee Common Stock 2013-03-13 4 S 0 14000 37.8166 D 0 I by Charitable Remainder Trust #3; Greg D. Kerley, Trustee Common Stock 25726.5057 I By 401(k) Plan Common Stock 1994 I By JGH Irrevocable Trust; Greg D. Kerley, Grantor Common Stock 150000 I by KEH Irrevocable Trust; Greg D. Kerley, Grantor Common Stock 151475 I By PAK Irrevocable Trust; Greg D. Kerley, Grantor Common Stock 1475 I By TMH Irrevocable Trust; Greg D. Kerley, Grantor Stock Options (Right to Buy) 20.335 2013-03-12 4 M 0 19391 0 D 2007-12-11 2013-12-11 Common Stock 19391 19391 D This transaction was executed in multiple trades at prices ranging from $37.64 to $37.76. The price reported above in Column 4 reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon written request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected. Since the date of the reporting person's last ownership report, 394,122 shares of SWN common stock were transferred to his ex-wife pursuant to a domestic relations order. The reporting person no longer reports as beneficially owned any securities owned by his former spouse. This transaction was executed in multiple trades at prices ranging from $37.60 to $37.84. The price reported above in Column 4 reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon written request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades at prices ranging from $37.70 to $37.91. The price reported above in Column 4 reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon written request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected. /s/ Melissa D. McCarty, Attorney-in-fact for Mr. Kerley 2013-03-14