FORWARD LOOKING STATEMENTS This investor presentation contains forward-looking statements, which address a variety of subjects including, for example, the expected timetable for closing of the proposed transaction between Cabot Microelectronics and KMG, the expected benefits and synergies of the proposed transaction and the capital structure of the combined company. Statements that are not historical facts, including statements about Cabot Microelectronics’ and KMG’s beliefs, plans and expectations, are forward-looking statements. Such statements are based on current expectations of Cabot Microelectronics’ and KMG’s management and are subject to a number of factors and uncertainties, which could cause actual results to differ materially from those described in the forward-looking statements. The following important factors and uncertainties, among others, could cause actual results to differ materially from those described in these forward-looking statements: the ability to satisfy the conditions to closing of the proposed transaction on the expected timing or at all and other risks related to the completion of the proposed transaction; the ability to obtain required shareholder and regulatory approvals for the proposed transaction on the expected timing or at all; the ability to complete the proposed transaction on the expected terms and timing or at all; higher than expected or unexpected costs associated with or relating to the proposed transaction; the risk that expected benefits, synergies and growth prospects of the proposed transaction may not be achieved in a timely manner or at all; the ability to successfully integrate KMG’s business with Cabot Microelectronics following the closing; the risk that Cabot Microelectronics and KMG will be unable to retain and hire key personnel; and the risk that disruption from the proposed transaction may adversely affect Cabot Microelectronics’ and KMG’s business and their respective relationships with customers, suppliers, distributors or employees. For additional information about factors that could cause actual results to differ materially from those described in the forward-looking statements, please refer to both Cabot Microelectronics’ and KMG’s filings with the Securities and Exchange Commission (“SEC”), including the risk factors contained in each of Cabot Microelectronics’ and KMG’s most recent Quarterly Reports on Form 10-Q and Annual Reports on Form 10-K. Forward-looking statements represent management’s current expectations and are inherently uncertain. Except as required by law, neither Cabot Microelectronics nor KMG undertakes any obligation to update forward-looking statements made by it to reflect new information, subsequent events or circumstances. IMPORTANT ADDITIONAL INFORMATION AND WHERE TO FIND IT In connection with the proposed transaction, Cabot Microelectronics will file with the SEC a registration statement of Cabot Microelectronics on Form S-4 (the “registration statement”) that will include a proxy statement of KMG and that will also constitute a prospectus of Cabot Microelectronics (the “proxy statement/prospectus”). KMG will mail the proxy statement/prospectus to its shareholders in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS ARE URGED TO CAREFULLY READ THE ENTIRE REGISTRATION STATEMENT, PROXY STATEMENT/PROSPECTUS AND OTHER RELEVANT INFORMATION FILED WITH THE SEC WHEN THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT CABOT MICROELECTRONICS, KMG AND THE PROPOSED TRANSACTION. The registration statement, proxy statement/prospectus and other documents filed by Cabot Microelectronics with the SEC may be obtained free of charge at Cabot Microelectronics’ website at www.cabotcmp.com or at the SEC’s website at www.sec.gov. These documents may also be obtained free of charge from Cabot Microelectronics by requesting them by mail at Cabot Microelectronics Corporation, 870 North Commons Drive, Aurora, Illinois 60504, Attention: Investor Relations, or by telephone at (630) 499-2600. The proxy statement/prospectus and other documents filed by KMG with the SEC may be obtained free of charge at KMG’ website at www.kmgchemicals.com or at the SEC’s website at www.sec.gov. These documents may also be obtained free of charge from KMG by requesting them by mail at KMG Chemicals, Inc., 300 Throckmorton Street, Fort Worth, TX 76102, Attention: Investor Relations, or by telephone at (817) 761-6100. PARTICIPANTS IN THE SOLICITATION KMG, Cabot Microelectronics, their respective directors and certain of their executive officers and employees may be deemed participants in the solicitation of proxies from KMG shareholders in connection with the proposed transaction under SEC rules. Information regarding Cabot Microelectronics’ directors and executive officers is available in its Annual Report on Form 10-K filed with the SEC on November 15, 2017, and in its definitive proxy statement filed with the SEC on January 23, 2018 in connection with its 2018 annual meeting of stockholders. Information regarding KMG’s directors and executive officers is available in its Annual Report on Form 10-K filed with the SEC on October 16, 2017, and in its definitive proxy statement filed with the SEC on November 3, 2017 in connection with its 2017 annual meeting of shareholders. Information regarding the persons who may be deemed to be participants in the solicitation of KMG shareholders in connection with the proposed transaction, including a description of their direct or indirect interests, by security holdings or otherwise, will be set forth in the proxy statement/prospectus and other relevant materials to be filed with the SEC when they become available. 2 ©2018 Cabot Microelectronics Corporation
