| Top Holders
| | | Shares Held | % O/S | Share Change | Filing Date | | Wellington Management Company, LLP | 11,732,996 | 7.3 | 1,585,351 | 09/30/15 | | Capital World Investors | 9,655,778 | 6.0 | -856,391 | 09/30/15 | | The Vanguard Group, Inc. | 9,042,503 | 5.6 | 140,155 | 09/30/15 | | Viking Global Investors LP | 8,962,186 | 5.6 | 2,298,899 | 10/20/15 | | State Street Global Advisors (US) | 8,342,030 | 5.2 | 310,801 | 09/30/15 | | SPO Partners & Co. | 7,296,564 | 4.5 | -54,325 | 09/30/15 | | T. Rowe Price Associates, Inc. | 6,481,948 | 4.0 | -4,173,260 | 09/30/15 | | BlackRock Institutional Trust Company, N.A. | 6,382,279 | 4.0 | 34,930 | 09/30/15 | | Fidelity Management & Research Company | 4,475,549 | 2.8 | 351,631 | 09/30/15 | | The Baupost Group, L.L.C. | 4,137,000 | 2.6 | 72,000 | 09/30/15 |
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