Summary Notice to Stockholders of Spartan Acquisition Corp. II Class A common stock as of July 6, 2021

IN THE COURT OF CHANCERY OF THE STATE OF DELAWARE

SUMMARY NOTICE OF PENDENCY AND PROPOSED
SETTLEMENT OF STOCKHOLDER CLASS ACTION,
SETTLEMENT HEARING, AND RIGHT TO APPEAR

TO: All Persons who held shares of Spartan Acquisition Corp. II (“Spartan”) Class A common stock as of 5:00 PM EDT on July 6, 2021 (the “Redemption Deadline”), either of record or beneficially, and who did not redeem all of their shares, including their successors in interest who obtained their shares by operation of law, but excluding the Excluded Persons (as defined in the Stipulation and the Notice) (the “Class”).¹

PLEASE READ THIS SUMMARY NOTICE CAREFULLY. YOUR RIGHTS WILL BE AFFECTED BY A CLASS ACTION LAWSUIT PENDING IN THIS COURT.

YOU ARE HEREBY NOTIFIED, pursuant to an Order of the Court of Chancery of the State of Delaware (the “Court”), that the above-captioned stockholder class action (the “Action”) is pending in the Court.

YOU ARE ALSO NOTIFIED that (i) plaintiffs Timothy McCants, Laurenṭiu Ovidiu Cernahoschi, and Thomas Joseph (“Plaintiffs”), individually and on behalf of the Class; and (ii) defendants Geoffrey Strong, Olivia Wassenaar, Wilson Handler, Christine Hommes, Joseph Romeo, Jan Wilson, John Stice, Spartan Acquisition Sponsor II LLC, Apollo Global Management, Inc., AP Spartan Energy Holdings II, L.P. (collectively the “Spartan Defendants”), and Barry Edinburg (collectively with the Spartan Defendants, “Defendants,” and Defendants together with Plaintiff, the “Parties,” and each a “Party”), have reached a proposed cash settlement for $8,000,000 in total (the “Settlement Amount”). The Settlement, if approved, will resolve all claims in the Action against the Defendants. A copy of the Settlement is available at www.SpartanDeSPACStockholderSettlement.com.

A hearing (the “Settlement Hearing”) will be held on October 7, 2026 at 9:15 a.m., before The Honorable Paul A. Fioravanti, Jr., Vice Chancellor, either in person at the Court of Chancery of the State of Delaware, Leonard L. Williams Justice Center, 500 North King Street, Wilmington, Delaware, 19801, or remotely by telephone or videoconference (in the discretion of the Court), to, among other things: (i) determine whether to finally certify the Class for settlement purposes only, pursuant to Court of Chancery Rules 23(a), 23(b)(1), and 23(b)(2); (ii) determine whether Plaintiffs and Plaintiffs’ Counsel have adequately represented the Class, and whether Plaintiffs should be finally appointed as Class representatives for the Class and Plaintiffs’ Counsel should be finally appointed as Class counsel for the Class; (iii) determine whether the Settlement and the proposed Plan of Allocation should be approved by the Court as fair, reasonable, adequate, and in the best interests of the Class; (iv) determine whether an Order and Final Judgment should be entered pursuant to the Stipulation; (v) determine whether and in what amount any Fee and Expense Award should be paid to Plaintiffs’ Counsel out of the Settlement Fund and the application for service awards to Plaintiffs; (vi) hear and determine any objections to the Settlement, the proposed Plan of Allocation, Plaintiffs’ Counsel’s application for an award of attorneys’ fees and expenses, or the application for any service award to Plaintiffs; and (vii) rule on such other matters as the Court may deem appropriate. Any updates regarding the Settlement Hearing, including any changes to the date or time of the hearing or updates regarding in-person or remote appearances at the hearing, will be posted to the Settlement website, www.SpartanDeSPACStockholderSettlement.com.

If you are a member of the Class, your rights will be affected by the pending Action and the Settlement, and you may be entitled to share in the Net Settlement Fund. If you have not yet received the Notice, you may obtain a copy of the Notice by contacting the Settlement Administrator at Spartan Stockholder Settlement, c/o Epiq Systems, Inc., PO Box 2258, Portland, OR 97208-2258. A copy of the Notice can also be downloaded from the Settlement website, www.SpartanDeSPACStockholderSettlement.com.

If the Settlement is approved by the Court and the Effective Date occurs, the Net Settlement Fund will be distributed on a claims-made basis to Eligible Class Members in accordance with the terms of the proposed Plan of Allocation stated in the Notice, attached to the Stipulation as Exhibit E, or in such other plan of allocation as is approved by the Court. The Class is a non “opt out” class pursuant to Delaware Court of Chancery Rules 23(a), 23(b)(1) and 23(b)(2). Accordingly, Class Members will be bound by any judgment entered in the Action pursuant to the terms and conditions of the Stipulation.

Any objections to the Settlement, the proposed Plan of Allocation, or Plaintiffs’ Counsel’s application for the Fee and Expense Award must be filed with the Register in Chancery in the Court of Chancery of the State of Delaware and delivered to Plaintiffs’ Counsel and Defendants’ Counsel such that they are received no later than September 23, 2026, in accordance with the instructions set forth in the Notice.

Please do not contact the Court or the Office of the Register in Chancery regarding this Summary Notice. All questions about this Summary Notice, the Settlement, or your eligibility to participate in the Settlement should be directed to the Settlement Administrator or Plaintiffs’ Counsel.

Requests for the Notice should be made to the Settlement Administrator:

Inquiries, other than requests for the Notice, should be made to Plaintiffs’ Counsel:

BY ORDER OF THE COURT OF CHANCERY OF THE STATE OF DELAWARE:

Dated: July 22, 2026