Alyeska Master Fund

Petition alleging fraud in Alyeska Master Fund LP, Alyeska Master Fund 2 LP, and Alyeska Master Fund 3 LP, all of the Cayman Islands v. Alta Mesa Resources, Inc., James T. Hackett, Thomas J. Walker, William Gutermuth, Jeffrey H. Tepper, Diana J. Walters, Stephen Coats, Harlan H. Chappelle, Michael E. Ellis, Ronald Smith, David M. Leuschen, Pierre F. Lapeyre, Jr., William W. McMullen, Don Dimitrievich, Donald Sinclair, Riverstone Holdings LLC, Bayou City Energy Management, LLC, HPS Investment Partners, LLC, and ARM Energy Holdings LLC at the District Court for Harris County, Texas.

Complaint alleging fraud involving "the sustained and intentional abuse by Defendants of the corporate form known as a special purpose acquisition company (“SPAC”) - in which a blank-check company conducts an initial public offering and then subsequently merges with an operating company that then becomes publicly traded - in order to mislead public investors" in Alyeska Master Fund LP, Alyeska Master Fund 2 LP, and Alyeska Master Fund 3 LP, all of the Cayman Islands v. Alta Mesa Resources, Inc., James T. Hackett, Thomas J. Walker, William Gutermuth, Jeffrey H. Tepper, Diana J. Walters, Stephen Coats, Harlan H. Chappelle, Michael E. Ellis, Ronald Smith, David M. Leuschen, Pierre F. Lapeyre, Jr., William W. McMullen, Don Dimitrievich, Donald Sinclair, Riverstone Holdings LLC, Bayou City Energy Management, LLC, HPS Investment Partners, LLC, and ARM Energy Holdings LLC at the U. S. District Court for the Southern District of Texas.