1、 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON,D.C.20549 FORM 10-K(Mark One)X ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31,2017 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE AC
2、T OF 1934 For the transition period from _ to _ Commission File Number 1-6075 UNION PACIFIC CORPORATION(Exact name of registrant as specified in its charter)UTAH 13-2626465(State or other jurisdiction of (I.R.S.Employer incorporation or organization)Identification No.)1400 DOUGLAS STREET,OMAHA,NEBRA
3、SKA(Address of principal executive offices)68179(Zip Code)(402)544-5000(Registrants telephone number,including area code)Securities registered pursuant to Section 12(b)of the Act:Title of each Class Name of each exchange on which registeredCommon Stock(Par Value$2.50 per share)New York Stock Exchang
4、e,Inc.Indicate by check mark if the registrant is a well-known seasoned issuer,as defined in Rule 405 of the Securities Act.Yes No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d)of the Act.Yes No Indicate by check mark whether the regi
5、strant(1)has filed all reports required to be filed by Section 13 or 15(d)of the Securities Exchange Act of 1934 during the preceding 12 months(or for such shorter period that the registrant was required to file such reports),and(2)has been subject to such filing requirements for the past 90 days.Ye
6、s No Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website,if any,every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T(232.405 of this chapter)during the preceding 12 months(or for such shorter