Atlas Energy Group (ATLS): Leon Cooperman Slashes Stake to Less than 10%

Leon G. Cooperman (“Mr. Cooperman”). Mr.
Cooperman is, among other activities, an investor engaged in investing for his own account. Mr. Cooperman is the Managing Member
of Omega Associates, L.L.C. (“Associates”), a limited liability company organized under the laws of the State of Delaware.
Associates is a private investment firm formed to invest in and act as general partner of investment partnerships or similar investment
vehicles. Associates is the general partner of limited partnerships organized under the laws of Delaware known as Omega Capital
Partners, L.P. (“Capital LP”), Omega Capital Investors, L.P. (“Investors LP”), and Omega Equity Investors,
L.P. (“Equity LP”).. These entities are private investment firms engaged in the purchase and sale of securities for
investment for their own accounts.

Mr. Cooperman is the President,
CEO, and majority stockholder of Omega Advisors, Inc. (“Advisors”), a Delaware corporation, engaged in providing investment
management services, and Mr. Cooperman is deemed to control said entity.

 Advisors
serves as the investment manager to Omega Overseas Partners, Ltd. (“Overseas”), a Cayman Island exempted company, with
a registered address at c/o Intertrust Corporate Services (Cayman) Limited, 190 Elgin Avenue, George Town, Grand Cayman KY1-9005,
Cayman Islands, British West Indies. Mr. Cooperman has investment discretion over Overseas’ portfolio investments and is
deemed to control such investments.

Advisors serve as a discretionary
investment advisor to a limited number of institutional clients (the “Managed Accounts”).  As to the Shares
owned by the Managed Accounts, there would be shared power to dispose or to direct the disposition of such Shares because the owners
of the Managed Accounts may be deemed beneficial owners of such Shares pursuant to Rule 13d-3 under the Act as a result of their
right to terminate the discretionary account within a period of 60 days.

Mr. Cooperman is the ultimate controlling
person of Associates, Capital LP, Investors LP, Equity LP, , Overseas, and Advisors.  The principal business office of
Capital LP, Investors LP, Equity LP, Overseas, and Advisors is 810 Seventh Avenue, 33rd floor, New York, New York 10019.

Mr. Cooperman is married to an individual named Toby Cooperman.
Mr. Cooperman is married to an individual named Toby Cooperman, and has an adult son named Michael S. Cooperman. The Michael S.
Cooperman WRA Trust (the “WRA Trust”) is an irrevocable trust for the benefit of Michael S. Cooperman. Mr. Cooperman
has investment authority over the Michael S. Cooperman and the WRA Trust accounts.  Mr. Cooperman is a Trustee of the Cooperman
Family Fund for a Jewish Future (“Family Fund”), a Type 1 charitable supporting foundation.