Forward-looking statements are based on the estimates and opinions of management at the time the statements
are made. Neither CONSOL nor Arch undertakes any obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law. Readers are cautioned not to place undue
reliance on these forward-looking statements that speak only as of the date hereof.
No Offer or Solicitation
This communication is not intended to be, and shall not constitute, an offer to buy or sell or the solicitation of an offer to buy or sell any securities, or a
solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such
jurisdiction. No offering of securities shall be made, except by means of a prospectus meeting the requirements of Section 10 of the U.S. Securities Act of 1933, as amended.
Additional Information about the Transaction and Where to Find It
In connection with the proposed transaction, CONSOL intends to file with the SEC a registration statement on Form S-4
that will include a joint proxy statement of Arch and CONSOL and that will also constitute a prospectus of CONSOL. Each of Arch and CONSOL may also file other relevant documents with the SEC regarding the proposed transaction. This document is not a
substitute for the joint proxy statement/prospectus or registration statement or any other document that Arch or CONSOL may file with the SEC. The definitive joint proxy statement/prospectus (if and when available) will be mailed to stockholders of
Arch and CONSOL. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT, JOINT PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS THAT MAY BE FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE
DOCUMENTS, CAREFULLY AND IN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE BECAUSE THEY CONTAIN OR WILL CONTAIN IMPORTANT INFORMATION ABOUT ARCH, CONSOL AND THE PROPOSED TRANSACTION.
Investors and security holders will be able to obtain free copies of the registration statement and joint proxy statement/prospectus (if and when available)
and other documents containing important information about Arch, CONSOL and the proposed transaction, once such documents are filed with the SEC through the website maintained by the SEC at http://www.sec.gov. Copies of the registration
statement and joint proxy statement/prospectus (if and when available) and other documents filed with the SEC by Arch may be obtained free of charge on Archs website at
https://investor.archrsc.com/sec-filings/ or, alternatively, by directing a request by mail to Archs Corporate Secretary at One CityPlace Drive, Suite 300, St. Louis, Missouri, 63141. Copies of
the registration statement and joint proxy statement/prospectus (if and when available) and other documents filed with the SEC by CONSOL may be obtained free of charge on CONSOLs website at
https://investors.consolenergy.com/sec-filings or, alternatively, by directing a request by mail to CONSOLs Corporate Secretary at 275 Technology Drive, Suite 101, Canonsburg, Pennsylvania 15317.
Participants in the Solicitation
Arch, CONSOL 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 Arch, including a
description of their direct or indirect interests, by security holdings or otherwise, is set forth in Archs proxy
statement for its 2024 Annual Meeting of Stockholders, which was filed with the SEC on March 27, 2024, including under the headings Executive Compensation, Director Compensation, Equity Compensation Plan
Information, and Security Ownership of Directors and Executive Officers. To the extent holdings of Arch common stock by the directors and executive officers of Arch have changed from the amounts of Arch common stock held by such
persons as reflected therein, such changes have been or will be reflected on Initial Statements of Beneficial Ownership of Securities on Form 3 (Form 3), Statements of Changes in Beneficial Ownership on Form 4 (Form
4) or Annual Statements of Changes in Beneficial Ownership of Securities on Form 5 (Form 5), in each case filed with the SEC, including: the Form 3 filed by George John Schuller on March
19, 2024; and the Forms 4 filed by Pamela Butcher on March
13, 2024, March
18, 2024 and June
17, 2024, James Chapman on March
11, 2024, Paul Demzik on March
5, 2024, John Eaves on March
8, 2024, Patrick Kriegshauser on March
18, 2024 and June
17, 2024, Holly Koeppel on March
18, 2024 and June
17, 2024, Richard Navarre on March
18, 2024, and June
17, 2024, George John Schuller on March
21, 2024, Peifang Zhang on March
18, 2024 and June
17, 2024 and John Ziegler on March 8, 2024. Information about the directors and executive officers of CONSOL, including a
description of their direct or indirect interests, by security holdings or otherwise, is set forth in CONSOLs proxy
statement for its 2024 Annual Meeting of Stockholders, which was filed with the SEC on April 1, 2024, including under the headings Board of Directors and Compensation Information, Executive Compensation Information
and Beneficial Ownership of Securities. To the extent holdings of CONSOL common stock by the directors and executive officers of CONSOL have changed from the amounts of CONSOL common stock held by such persons as reflected therein, such
changes have been or will be reflected on Forms 3, Forms 4 or Forms 5, in each case filed with the SEC, including: the Forms 4 filed by James Brock on May
24, 2024 and July
1, 2024, John Mills on May
9, 2024, Cassandra Chia-Wei Pan on May
9, 2024, Valli Perera on May
9, 2024, Joseph Platt on May
9, 2024 and John Rothka on March 8, 2024. Other information regarding the participants in the proxy solicitations and a
description of their direct and indirect interests, by security holdings or otherwise, will be contained in the registration statement and joint proxy statement/prospectus and other relevant materials to be filed with the SEC regarding the proposed
transaction when such materials become available. Investors and security holders should read the registration statement and joint proxy statement/prospectus carefully when it becomes available before making any voting or investment decisions. You
may obtain free copies of any of the documents referenced herein from Arch or CONSOL using the sources indicated above.
Non-GAAP Financial Information
This communication may include certain non-GAAP financial measures as defined in Regulation G under the
Securities Exchange Act of 1934, as amended. These non-GAAP financial measures are included in this communication as the management of CONSOL and Arch believe such measures are useful to investors in
evaluating the companies operating performance. CONSOL and Arch may use different methods for calculating these non-GAAP financial measures. These non-GAAP
financial measures are not intended to be a substitute for, and should not be considered in isolation from, the financial measures reported in accordance with GAAP by each of CONSOL and Arch in their filings with the SEC.