0001140361-15-007247 SC 13G 1 20150217 20150217 Antero Midstream Partners LP 0001598968 4922 464109058 DE 1231 SC 13G 34 005-88411 15621999 1615 WYNKOOP STREET DENVER CO 80202 (303) 357-7310 1615 WYNKOOP STREET DENVER CO 80202 Antero Resources Midstream LLC 20140203 Clearbridge Investments, LLC 0001348883 010846058 SC 13G 620 8TH AVENUE NEW YORK NY 10018 800-691-6959 620 8TH AVENUE NEW YORK NY 10018 Clearbridge Advisors, LLC 20061012 CAM North America, LLC 20060105 SC 13G 1 doc1.htm NONE