In March 2013 Ammonite was retained as geotechnical and engineering consultants on behalf of plaintiffs by Robbins Geller Rudman & Dowd LLP in a class action suit against Sandridge Energy, Inc, Oklahoma City, Oklahoma. Our role was to confirm the basis for the complaint that Sandridge and its management had misrepresented the results of its multi-billion dollar Mississippi Lime play. We examined the company’s operations and public disclosures inclusive of the lease acquisition program, exploration and development budgets, drilling results, production figures, reserve estimates, and the decline curve for the Mississippi Lime. Between 2013 and 2019, Ammonite consultants Skip Hobbs, Lynn Pittinger, Betsy Suppes, Bob Merrill, Mike Canich, and Mark and Zach Hughes worked on various aspects of the litigation. Ammonite also assisted counsel in amending the original complaint, preparing a list of documents to request in discovery, preparing questions for depositions of Sandridge technical staff and management; responding to defendant’s reply briefs; and finally in selecting a testifying expert witness. This was the largest engagement in Ammonite’s 42 years in business.

It its September 1, 2022 filing with the federal court requesting reimbursement of third-party litigation expenses, counsel for Robbins Geller Rudman & Dowd included the following:

(f) Experts/Consultants/Investigators: $1,330,971.86.

(i) Ammonite Resources: $761,193.90. Ammonite Resources (“Ammonite”) served a critical consulting role from nearly the start of the Litigation. This case involves highly complex and specialized issues relating to oil and natural gas production and estimates of reserves. Ammonite Resources is an expert consulting group specializing in geotechnical and economic analysis of energy and mineral exploration. Robbins Geller attorneys worked with Ammonite in key facets of the case, including the investigation for the amended complaint and all iterations thereafter. Ammonite assisted with the analysis of SandRidge’s business and reserves, including evaluations of the estimated ultimate recovery (“EUR”), gas to oil ratio (“GOR”), and economics of SandRidge’s assets in the Mississippian play. Ammonite assisted Plaintiffs’ counsel with the interpretation of Defendants’ statements during the Class Period and in formulating Plaintiffs’ claims. Ammonite also provided substantial assistance to Plaintiffs’ counsel during discovery, including document discovery and depositions. Ammonite helped Plaintiffs’ counsel analyze and interpret documents and data obtained during discovery, consisting of thousands of pages of Case 5:12-cv-01341-G Document 579 Filed 09/01/22 Page 5 of 12 – 5 – 4854-6850-3081.v2 spreadsheets containing technical oil and gas production and reserves data. Ammonite assisted Plaintiffs in evaluating the evidence developed during discovery.

Ammonite Managing Partner Skip Hobbs said that Ammonite’s work on the Sandridge litigation with the legal team from Robbins Geller Rudman & Dowd was a most interesting and intellectually rewarding engagement. It also provided a front-row seat to observe and learn how a complex, fiercely defended litigation, slowly works its way through the United States justice system.