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|--------------------------|
|                          |  |
| 001-10315                | 63-0860407 |
| (Commission File Number) | (I.R.S. Employer Identification No.) |
|                     |   |

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|--------|
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| ¨ | Written communication 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)) |

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|                                                                              |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|                                                                         |   | Three Months Ended June 30, |   | Six Months Ended June 30, |   | Year Ended December 31, |
| (Millions)                                                                   |   | 2016 |   | 2015 |   | 2016 |   | 2015 |   | 2015 |   | 2014 |   | 2013 |   | 2012 |   | 2011 |
| Net cash provided by operating activities                                    |   | $ | 152.2 |  |   | $ | 102.9 |  |   | $ | 311.9 |  |   | $ | 204.9 |  |   | $ | 484.8 |  |   | $ | 444.9 |  |   | $ | 470.3 |  |   | $ | 411.5 |  |   | $ | 342.7 |  |
| Provision for doubtful accounts                                              |   | (15.4 | ) |   | (10.9 | ) |   | (31.9 | ) |   | (22.5 | ) |   | (47.2 | ) |   | (31.6 | ) |   | (26.0 | ) |   | (27.0 | ) |   | (21.0 | ) |
| Professional fees—accounting, tax, and legal                           |   | 1.7 |  |   | 0.1 |  |   | 1.9 |  |   | 2.3 |  |   | 3.0 |  |   | 9.3 |  |   | 9.5 |  |   | 16.1 |  |   | 21.0 |  |
| Interest expense and amortization of debt discounts and fees                 |   | 43.4 |  |   | 30.9 |  |   | 88.0 |  |   | 62.7 |  |   | 142.9 |  |   | 109.2 |  |   | 100.4 |  |   | 94.1 |  |   | 119.4 |  |
| Equity in net income of nonconsolidated affiliates                           |   | 2.4 |  |   | 2.3 |  |   | 4.8 |  |   | 3.9 |  |   | 8.7 |  |   | 10.7 |  |   | 11.2 |  |   | 12.7 |  |   | 12.0 |  |
| Net income attributable to noncontrolling interests in continuing operations |   | (18.6 | ) |   | (17.3 | ) |   | (37.3 | ) |   | (33.8 | ) |   | (69.7 | ) |   | (59.7 | ) |   | (57.8 | ) |   | (50.9 | ) |   | (47.0 | ) |
| Amortization of debt-related items                                           |   | (3.4 | ) |   | (3.0 | ) |   | (6.8 | ) |   | (6.3 | ) |   | (14.3 | ) |   | (12.7 | ) |   | (5.0 | ) |   | (3.7 | ) |   | (4.2 | ) |
| Distributions from nonconsolidated affiliates                                |   | (1.3 | ) |   | (1.8 | ) |   | (3.0 | ) |   | (3.7 | ) |   | (7.7 | ) |   | (12.6 | ) |   | (11.4 | ) |   | (11.0 | ) |   | (13.0 | ) |
| Current portion of income tax expense                                        |   | 4.0 |  |   | 3.4 |  |   | 9.0 |  |   | 6.9 |  |   | 14.8 |  |   | 13.3 |  |   | 6.3 |  |   | 5.9 |  |   | 0.6 |  |
| Change in assets and liabilities                                             |   | 36.9 |  |   | 45.2 |  |   | 55.2 |  |   | 101.2 |  |   | 147.1 |  |   | 90.1 |  |   | 48.9 |  |   | 58.1 |  |   | 41.4 |  |
| Net premium paid on bond issuance/redemption                                 |   | 2.0 |  |   | 11.8 |  |   | 3.9 |  |   | 3.8 |  |   | 3.9 |  |   | 4.3 |  |   | 1.7 |  |   | 1.9 |  |   | 22.8 |  |
| Cash used in (provided by) operating activities of discontinued operations   |   | 0.3 |  |   | 0.2 |  |   | 0.5 |  |   | 0.3 |  |   | 0.7 |  |   | 1.2 |  |   | 1.9 |  |   | (2.0 | ) |   | (9.1 | ) |
| Transaction costs                                                            |   | — |  |   | 3.3 |  |   | — |  |   | 3.3 |  |   | 12.3 |  |   | 9.3 |  |   | — |  |   | — |  |   | — |  |
| Other                                                                        |   | 0.1 |  |   | 2.4 |  |   | 0.2 |  |   | 2.6 |  |   | 3.2 |  |   | 1.9 |  |   | 1.6 |  |   | 0.2 |  |   | 0.6 |  |
| Adjusted EBITDA                                                              |   | $ | 204.3 |  |   | $ | 169.5 |  |   | $ | 396.4 |  |   | $ | 325.6 |  |   | $ | 682.5 |  |   | $ | 577.6 |  |   | $ | 551.6 |  |   | $ | 505.9 |  |   | $ | 466.2 |  |

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|--------------------------------------------------------------|
|                                                              |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|                                                         | Q2 2016 |   | Q1 2016 |   | Q4 2015 |   | Q3 2015 |   | Q2 2015 |   | Q1 2015 |   |   | Full Year 2015 |
|                                                         | In Millions |
| Total segment Adjusted EBITDA                                | $ | 230.1 |  |   | $ | 219.5 |  |   | $ | 216.4 |  |   | $ | 186.9 |  |   | $ | 189.5 |  |   | $ | 181.3 |  |   |   | $ | 774.1 |  |
| General and administrative expenses                          | (34.4 | ) |   | (31.9 | ) |   | (36.0 | ) |   | (30.6 | ) |   | (32.1 | ) |   | (34.6 | ) |   |   | (133.3 | ) |
| Depreciation and amortization                                | (42.9 | ) |   | (42.4 | ) |   | (41.4 | ) |   | (33.7 | ) |   | (32.7 | ) |   | (31.9 | ) |   |   | (139.7 | ) |
| (Loss) gain on disposal or impairment of assets              | (0.2 | ) |   | (0.2 | ) |   | (2.4 | ) |   | (0.9 | ) |   | (0.8 | ) |   | 1.5 |  |   |   | (2.6 | ) |
| Government, class action, and related settlements            | — |  |   | — |  |   | 0.5 |  |   | — |  |   | — |  |   | (8.0 | ) |   |   | (7.5 | ) |
| Professional fees - accounting, tax, and legal               | (1.7 | ) |   | (0.2 | ) |   | (0.3 | ) |   | (0.4 | ) |   | (0.1 | ) |   | (2.2 | ) |   |   | (3.0 | ) |
| Loss on early extinguishment of debt                         | (2.4 | ) |   | (2.4 | ) |   | (2.4 | ) |   | — |  |   | (18.8 | ) |   | (1.2 | ) |   |   | (22.4 | ) |
| Interest expense and amortization of debt discounts and fees | (43.4 | ) |   | (44.6 | ) |   | (44.6 | ) |   | (35.6 | ) |   | (30.9 | ) |   | (31.8 | ) |   |   | (142.9 | ) |
| Net income attributable to noncontrolling interests          | 18.6 |  |   | 18.7 |  |   | 18.8 |  |   | 17.1 |  |   | 17.3 |  |   | 16.5 |  |   |   | 69.7 |  |
| Gain related to SCA equity interest                          | — |  |   | — |  |   | — |  |   | 0.6 |  |   | 2.6 |  |   | — |  |   |   | 3.2 |  |
| Income from continuing operations before income tax expense  | $ | 123.7 |  |   | $ | 116.5 |  |   | $ | 108.6 |  |   | $ | 103.4 |  |   | $ | 94.0 |  |   | $ | 89.6 |  |   |   | $ | 395.6 |  |

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|        |
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|        |  |  |
|   |   |   |
| By:    | /s/   Patrick Darby |
|   | Name: | Patrick Darby |
|   | Title: | Executive Vice President, General Counsel and Secretary |