================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (date of earliest event reported): JUNE 12, 2006 NEXEN INC. - -------------------------------------------------------------------------------- (Exact Name of Registrant as Specified in Its Charter) CANADA - -------------------------------------------------------------------------------- (State or Other Jurisdiction of Incorporation) 1-6702 98-6000202 - -------------------------------------------------------------------------------- (Commission File Number) (IRS Employer Identification No.) 801 - 7TH AVENUE S.W. CALGARY, ALBERTA, CANADA T2P 3P7 - -------------------------------------------------------------------------------- (Address of Principal Executive Offices) (Zip Code) (403) 699-4000 - -------------------------------------------------------------------------------- (Registrant's Telephone Number, Including Area Code) NOT APPLICABLE - -------------------------------------------------------------------------------- (Former Name or Former Address, if Changed Since Last Report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (SEE General Instruction A.2. below): [_] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [_] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [_] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [_] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) ================================================================================ ITEM 8.01. OTHER EVENTS. On June 12, 2006, Nexen Inc. mailed to it's registered holders a summary version of Nexen's 2005 Sustainability Report, which sets forth our objectives and performance with respect to integrity, governance, stakeholder engagement, safety and the environment. A more detailed, 40 page summary of the Report is available upon request or can also be accessed at www.nexeninc.com. Nexen believes that our Sustainability Report is an important part of our commitment to help investors see the value that Nexen's sustainable business practices create for the Company. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report on Form 8-K to be signed on its behalf by the undersigned, thereunto duly authorized. Dated: June 12, 2006 NEXEN INC. By: /s/ Sylvia L. Groves ---------------------------- Name: Sylvia L. Groves Title: Assistant Secretary