<SEC-DOCUMENT>0001103804-14-000041-index.html : 20141024 <SEC-HEADER>0001103804-14-000041.hdr.sgml : 20141024 <ACCEPTANCE-DATETIME>20141024152205 ACCESSION NUMBER: 0001103804-14-000041 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20141024 DATE AS OF CHANGE: 20141024 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: PIONEER NATURAL RESOURCES CO CENTRAL INDEX KEY: 0001038357 STANDARD INDUSTRIAL CLASSIFICATION: CRUDE PETROLEUM & NATURAL GAS [1311] IRS NUMBER: 752702753 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-51453 FILM NUMBER: 141172279 BUSINESS ADDRESS: STREET 1: 200 WILLIAMS SQUARE WEST STREET 2: 5205 N OCONNOR BLVD CITY: IRVING STATE: TX ZIP: 75039 BUSINESS PHONE: 9724449001 MAIL ADDRESS: STREET 1: 200 WILLIAMS SQUARE WEST STREET 2: 5205 N OCONNOR BLVD CITY: IRVING STATE: TX ZIP: 75039 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: VIKING GLOBAL INVESTORS LP CENTRAL INDEX KEY: 0001103804 IRS NUMBER: 134055118 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 55 RAILROAD AVENUE CITY: GREENWICH STATE: CT ZIP: 06830 BUSINESS PHONE: 203-863-5062 MAIL ADDRESS: STREET 1: 55 RAILROAD AVENUE CITY: GREENWICH STATE: CT ZIP: 06830 </SEC-HEADER> <DOCUMENT> <TYPE>SC 13G <SEQUENCE>1 <FILENAME>v13gPioneer.txt <TEXT> Document 1 - file: v13gPioneer.txt
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