There are multiple ways to submit a claim, please review the options below.

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To recover as a Class Member based on the claims in the Action, you must complete and sign the Proof of Claim and Release Form (“Proof of Claim”). The Proof of Claim incorporates by reference the definitions in the Stipulations of Settlement dated October 16, 2024, October 29, 2024, November 8, 2024, and January 6, 2025 (collectively, the “Stipulations”), which can be obtained on this website. If you fail to submit a properly addressed (as set forth in paragraph 3 below) Proof of Claim, your claim may be rejected and you may be precluded from any recovery from the Net Settlement Fund created in connection with the proposed Settlement.

Submission of the Proof of Claim, however, does not assure that you will share in the proceeds of the Settlement of the Action.

YOU MUST MAIL OR SUBMIT ONLINE YOUR COMPLETED AND SIGNED PROOF OF CLAIM, ACCOMPANIED BY COPIES OF THE DOCUMENTS REQUESTED THEREIN, ON OR BEFORE MAY 7, 2025, ADDRESSED AS FOLLOWS:

Alta Mesa Securities Litigation
Claims Administrator
c/o JND Legal Administration
P.O. Box 91218
Seattle, WA 98111

If you are NOT a Class Member, as defined in the Notice of Proposed Settlement of Class Action (“Notice”), DO NOT submit a Proof of Claim.

If you are a Class Member and you did not timely request exclusion from the Class, you are bound by the terms of any judgment entered in the Action, including the releases provided therein, WHETHER OR NOT YOU SUBMIT A PROOF OF CLAIM.

CLAIMANT IDENTIFICATION

You are a member of the Class if you: (1) held shares of Alta Mesa Resources, Inc. (“Alta Mesa”) f/k/a Silver Run Acquisition Corporation II (“Silver Run II”) common stock (CUSIP 02133L109; ticker “SRUN”), and/or Silver Run II Units (“Silver Run Units”) (CUSIP 82812A202; ticker “SRUNU”) on January 22, 2018 record date that were entitled to vote on Alta Mesa’s proposed transaction with Alta Mesa Holdings and Kingfisher Midstream (the “Business Combination”); or (2) purchased or otherwise acquired Alta Mesa (Silver Run II) common stock (CUSIP 02133L109; ticker “SRUN”), Alta Mesa (Silver Run II) warrants (CUSIP 02133L117; ticker “SRUNW”), and/or Silver Run Units (CUSIP 82812A202; ticker “SRUNU”) on or after August 16, 2017 and prior to the closing of the Business Combination on February 9, 2018; or (3) purchased or otherwise acquired Alta Mesa common stock (CUSIP 02133L109; ticker “AMR”) or Alta Mesa warrants (CUSIP 02133L117; ticker “AMRWW”) (other than those automatically converted from Silver Run Units by operation of the Business Combination) between the February 9, 2018 closing of the Business Combination and May 17, 2019 (inclusive) (collectively, with Alta Mesa (Silver Run II) common stock and Alta Mesa (Silver Run II) warrants, “Alta Mesa Securities”), and are not otherwise excluded from the Class.

Use Part I of the form entitled “Claimant Identification” to identify each holder, purchaser, or acquirer of record (“nominee”) of the Alta Mesa Securities that forms the basis of the claim. THE PROOF OF CLAIM MUST BE FILED BY THE ACTUAL BENEFICIAL PURCHASER(S) OR ACQUIRER(S) OR THE LEGAL REPRESENTATIVE OF SUCH PURCHASER(S) OR ACQUIRER(S) OF ALTA MESA SECURITIES UPON WHICH THE CLAIM IS BASED.

All joint purchasers or acquirers must sign the Proof of Claim. Executors, administrators, guardians, conservators, and trustees must complete and sign the claim on behalf of persons represented by them and their authority must accompany the claim and their titles or capacities must be stated. The last four digits of the Social Security Number (or full Taxpayer Identification Number) and telephone number of the beneficial owner may be used in verifying the claim. Failure to provide the foregoing information could delay verification of your claim or result in the rejection of the claim.

A Proof of Claim should be submitted for each separate legal entity (e.g., a claim of joint owners should not include separate transactions of just one of the joint owners, and an individual should not combine his or her IRA transactions with transactions made solely in the individual’s name). Conversely, a single Proof of Claim should be submitted on behalf of one legal entity including all transactions made by that entity, no matter how many separate accounts that entity has (e.g., an institution with multiple brokerage accounts that the entity has transacted in Alta Mesa Securities from August 16, 2017 through May 17, 2019, inclusive (the “Class Period”).

CLAIM FORM

Use Part II of the form entitled “Schedule of Transactions in Alta Mesa Securities” to supply all required details of your transaction(s). If you need more space or additional schedules, attach separate sheets giving all of the required information in substantially the same form. Sign and print or type your name on each additional sheet.

On the schedule(s), provide all of the requested information with respect to all of your purchases, acquisitions, and sales of Alta Mesa Securities that took place between August 16, 2017 and August 16, 2019, inclusive, whether such transactions resulted in a profit or a loss. You must also provide all of the requested information with respect to the number and type of Alta Mesa Securities you held at the close of trading on August 15, 2017, January 22, 2018, and August 16, 2019. Failure to report all such transactions may result in the rejection of your claim.

List each transaction separately and in chronological order, by trade date, beginning with the earliest. You must accurately provide the month, day, and year of each transaction you list.

The date of covering a “short sale” is deemed to be the date of purchase or other acquisition of Alta Mesa Securities. The date of a “short sale” is deemed to be the date of sale of Alta Mesa Securities.

COPIES OF BROKER CONFIRMATIONS OR OTHER DOCUMENTATION OF YOUR TRANSACTIONS IN ALTA MESA SECURITIES SHOULD BE ATTACHED TO YOUR PROOF OF CLAIM. FAILURE TO PROVIDE THIS DOCUMENTATION COULD DELAY VERIFICATION OF YOUR CLAIM OR RESULT IN THE REJECTION OF YOUR CLAIM. THE PARTIES DO NOT HAVE INFORMATION ABOUT YOUR TRANSACTIONS IN ALTA MESA SECURITIES.

PLEASE NOTE: As set forth in the Plan of Allocation contained in the Notice, each Authorized Claimant shall receive his, her, its, or their pro rata share of the Net Settlement Fund. If the prorated payment to any Authorized Claimant calculates to less than $10.00, it will not be included in the calculation and no distribution will be made to that Authorized Claimant.

NOTICE REGARDING ELECTRONIC FILES: Certain claimants with large numbers of transactions may request, or may be requested, to submit information regarding their transactions in electronic files. All such claimants MUST also submit a manually signed paper Proof of Claim whether or not they also submit electronic copies. If you wish to submit your claim electronically, you must contact the Claims Administrator at ATASecurities@jndla.com to obtain the required file layout. No electronic files will be considered to have been properly submitted unless the Claims Administrator issues to the claimant a written acknowledgment of receipt and acceptance of electronically submitted data.

UNITED STATES DISTRICT COURT
SOUTHERN DISTRICT OF TEXAS
HOUSTON DIVISION

In re Alta Mesa Resources, Inc. Securities Litigation
No. 4:19-cv-00957

PROOF OF CLAIM AND RELEASE
Must Be Postmarked (if Mailed) or Received (if Submitted Online) No Later Than:
May 7, 2025

Please Type or Print

REMEMBER TO ATTACH COPIES OF BROKER CONFIRMATIONS OR OTHER DOCUMENTATION OF YOUR TRANSACTIONS IN ALTA MESA SECURITIES. FAILURE TO PROVIDE THIS DOCUMENTATION COULD DELAY VERIFICATION OF YOUR CLAIM OR RESULT IN THE REJECTION OF YOUR CLAIM.