CABOT MICROELECTRONICS CORPORATION FORM 10-K For the Fiscal Year Ended September 30, 2012 PART I. Item 1. Item 1A. Item 1B. Item 2. Item 3. Business Risk Factors Unresolved Staff Comments Properties Legal Proceedings Executive Officers of the Registrant Page 3 11 15 15 16 16 PART II. Item 5. Item 6. Item 7. Item 7A. Item 8. Item 9. Item 9A. Item 9B. PART III. Item 10. Item 11. Item 12. Item 13. Item 14. PART IV. Item 15. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities Selected Financial Data Management’s Discussion and Analysis of Financial Condition and Results of Operations Quantitative and Qualitative Disclosures about Market Risk Financial Statements and Supplementary Data Changes in and Disagreements with Accountants on Accounting and Financial Disclosure Controls and Procedures Other Information 18 20 21 32 33 62 62 63 Directors, Executive Officers and Corporate Governance Executive Compensation Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters Certain Relationships and Related Transactions, and Director Independence Principal Accountant Fees and Services 63 63 64 64 64 Exhibits and Financial Statement Schedules Exhibit Index Signatures 65 65 68 2