X0303 4/A 2011-03-25 2011-03-29 0 0000060714 LSB INDUSTRIES INC LXU 0001258649 SHEAR DAVID MICHAEL 16 SOUTH PENNSYLVANIA AVENUE OKLAHOMA CITY OK 73107 0 1 0 0 Senior VP/General Counsel/Sec 0001258647 SHEAR HEIDI L BROWN 16 SOUTH PENNSYLVANIA AVENUE OKLAHOMA CITY OK 73107 0 1 0 0 VP/Managing Counsel/Asst Sec Common Stock 2011-03-25 4 S 0 5000 39.50 D 40581 I By Trusts The designated reporting person is David M. Shear. Mr. Shear's spouse, Heidi L. Brown Shear, jointly files this report with Mr. Shear. Heidi Shear is Vice President, Managing Counsel and Assistant Secretary of the Issuer. These shares are held in an account jointly owned by David Shear's revocable trust, of which he is settlor and trustee, and Heidi Shear's revocable trust, of which she is settlor and trustee. This Form 4 amends the Form 4 filed by David Michael Shear on March 29, 2011, to include Heidi L. Brown Shear as a joint reporting person. Ms. Shear was a signatory to the original Form 4 filed on March 29, 2011. David M. Shear 2011-03-29 Heidi L. Brown Shear 2011-03-29