IN RE MAMMOTH ENERGY SERVICES, INC. SECURITIES LITIGATION

Case No. CIV-19-522-J

UNITED STATES DISTRICT COURT WESTERN DISTRICT OF OKLAHOMA

Important Dates

October 30, 2021 — Claim Filing Deadline

August 31, 2021 — Exclusion Deadline

August 31, 2021 — Objection Deadline

September 21, 2021 at 10:00 a.m. — Settlement Hearing

This Notice relates to a proposed Settlement of claims in a pending securities class action brought by investors alleging, among other things, that defendants Mammoth Energy Services, Inc. (“Mammoth”) Arty Straehla, Mark Layton, and Keith Ellison (collectively, the “Defendants”) violated the federal securities laws by making false and misleading statements relating to contracts between the Puerto Rico Electric Power Authority (“PREPA”) and an indirect Mammoth subsidiary, and related payments. A more detailed description of the Action is set forth on pages 4-6 below. The proposed Settlement, if approved by the Court, will settle claims of the Settlement Class, as defined on page 6 below.

YOUR LEGAL RIGHTS AND OPTIONS IN THESE SETTLEMENTS

Submit a claim.
Submit a Claim Form postmarked no later than October 30, 2021.

This is the only way to be eligible to receive a payment from the Settlement Fund. If you are a Settlement Class Member and you remain in the Settlement Class, you will be bound by the Settlement as approved by the Court and you will give up any Released Plaintiff’s Claims (defined below) that you have against Defendants and the other Defendants’ Releasees (defined below), so it is in your interest to submit a Claim Form.

Exclude yourself.
Exclude yourself from the Settlement Class by submitting a written exclusion so that it is received by no later than August 31, 2021.

If you exclude yourself from the Settlement Class, you will not be eligible to receive any payment from the Settlement Fund. This is the only option that allows you ever to be part of any other lawsuit against any of the Defendants or the other Defendants’ Releasees concerning the Released Plaintiff’s Claims.

Object.
Object to the Settlement by submitting a written objection so that it is received no later than August 31, 2021.

If you do not like the proposed Settlement, the proposed Plan of Allocation, or the request for attorneys’ fees and reimbursement of Litigation Expenses, you may write to the Court and explain why you do not like them. You cannot object to the Settlement, the Plan of Allocation or the fee and expense request unless you are a Settlement Class Member and do not exclude yourself from the Settlement Class.

Appear at a hearing.
Attend a hearing on September 21, 2021, and file a Notice of Intention to Appear so that it is received no later than August 31, 2021.

Filing a written objection and notice of Intention to Appear by August 31, 2021 allows you to speak in Court, at the discretion of the Court, about the fairness of the proposed Settlement, the Plan of Allocation, and/or the request for attorneys’ fees and reimbursement of Litigation Expenses. If you submit a written objection, you may (but you do not have to) attend the hearing and, at the discretion of the Court, speak to the Court about your objection.

Do nothing.

If you are a member of the Settlement Class and you do not submit a valid Claim Form, you will not be eligible to receive any payment from the Settlement Fund. You will, however, remain a member of the Settlement Class, which means that you give up your right to sue about the claims that are resolved by the Settlement and you will be bound by any judgments or orders entered by the Court in the Action.