On July 18, 2019, Keane Group, Inc. (“Keane”) received notification of early termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, with respect to the proposed merger of equals (the “proposed merger”) between Keane and C&J Energy Services, Inc. (“C&J”). The termination satisfies one of the conditions to the closing of the proposed merger.

Important Additional Information Regarding the Merger of Equals Will Be Filed With the SEC

In connection with the proposed merger, Keane has filed a registration statement on Form S 4 that includes a joint proxy statement of Keane and C&J that also constitutes a prospectus of Keane with the Securities and Exchange Commission (the “SEC”). Each of Keane and C&J have also filed other relevant documents with the SEC regarding the proposed transaction. No offering of securities shall be made, except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended. INVESTORS AND STOCKHOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT, JOINT PROXY STATEMENT/PROSPECTUS AND OTHER DOCUMENTS FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED MERGER. Investors and stockholders may obtain free copies of these documents and other documents containing important information about Keane and C&J through the website maintained by the SEC at http://www.sec.gov. Copies of the documents filed with the SEC by Keane are available free of charge on Keane’s website at http://www.keanegrp.com or by contacting Keane’s Investor Relations Department by email at investors@keanegrp.com or by phone at 281-929-0370. Copies of the documents filed with the SEC by C&J are available free of charge on C&J’s website at www.cjenergy.com or by contacting C&J’s Investor Relations Department by email at investors@cjenergy.com or by phone at 713-260-9986.

Participants in the Solicitation

C&J, Keane and certain of their respective directors and executive officers may be deemed to be participants in the solicitation of proxies in respect of the proposed transaction. Information about the directors and executive officers of C&J is set forth in its proxy statement for its 2019 annual meeting of shareholders, which was filed with the SEC on April 9, 2019, and C&J’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018, which was filed with the SEC on February 27, 2019. Information about the directors and executive officers of Keane is set forth in Keane’s proxy statement for its 2019 annual meeting of shareholders, which was filed with the SEC on April 1, 2019, and Keane’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018, which was filed with the SEC on February 27, 2019. Other information regarding the participants in the proxy solicitations and a description of their direct and indirect interests, by security holdings or otherwise, is contained in the joint proxy statement/prospectus and other relevant materials filed with the SEC regarding the proposed merger. Investors should read the joint proxy statement/prospectus carefully when it becomes available before making any voting or investment decisions. You may obtain free copies of these documents from C&J or Keane using the sources indicated above.

No Offer or Solicitation

This document is not intended to and does not constitute an offer to sell or the solicitation of an offer to subscribe for or buy or an invitation to purchase or subscribe for any securities or the solicitation of any vote in any jurisdiction pursuant to the proposed transaction or otherwise, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in contravention of applicable law. Subject to certain exceptions to be approved by the relevant regulators or certain facts to be ascertained, the public offer will not be made directly or indirectly, in or into any jurisdiction where to do so would constitute a violation of the laws of such jurisdiction, or by use of the mails or by any means or instrumentality (including without limitation, facsimile transmission, telephone and the internet) of interstate or foreign commerce, or any facility of a national securities exchange, of any such jurisdiction.

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