The Sanchez Energy lawsuit ended with secured lenders taking everything. After a Fifth Circuit ruling in May 2025 and the U.S. Supreme Court’s denial of review on November 24, 2025, funds managed by Apollo Global Management and Fidelity Management & Research were confirmed as 100 percent owners of Mesquite Energy, Inc., the company that emerged from Sanchez Energy Corporation’s Chapter 11 case. Unsecured creditors, who had won a roughly 70 percent equity stake in bankruptcy court, walked away with nothing from that fight. The bankruptcy court entered a final decree closing the case on June 1, 2026.
How Sanchez Got to Chapter 11
Sanchez Energy was a Texas oil and gas producer operating in the Eagle Ford Shale. It filed for Chapter 11 in the U.S. Bankruptcy Court for the Southern District of Texas on August 11, 2019, carrying more than $2 billion in debt: $500 million in senior secured notes, $600 million in unsecured notes due 2021, $1.15 billion in additional unsecured notes due 2023, and a $25 million credit facility with Royal Bank of Canada.
The company’s operating margins had turned negative well before the filing. Interest payments on the 2023 unsecured notes were deferred, the CFO and COO left, financial advisors were brought in to explore “strategic alternatives,” and the New York Stock Exchange began delisting proceedings. The subsequent collapse in oil prices and the COVID-19 pandemic finished the job. Judge Marvin Isgur was assigned the case.
The Equity Split That Drove the Litigation
The bankruptcy court confirmed a reorganization plan on April 30, 2020, and Sanchez emerged as Mesquite Energy, Inc. on June 30, 2020. The parties agreed the reorganized company was worth $85 million, not counting whatever the estate might recover through litigation. Twenty percent of the equity went immediately to the debtor-in-possession lenders. The other 80 percent was held back, to be split later based on how a fight over the secured lenders’ collateral came out.
That fight turned on the “HHK Leases,” oil and gas properties covering roughly 110,000 acres that were supposed to secure the $500 million in senior secured notes. The lien paperwork had errors. Between June 27 and July 24, 2019, the secured noteholders filed correction affidavits to fix the documents. Because those corrections fell inside the 90-day window before the August 11 bankruptcy filing, the unsecured creditors’ representative, Delaware Trust Company, argued they were avoidable preferential transfers.
What the Bankruptcy Court Decided
The plan set up a three-phase litigation. Phase One validated the DIP lenders’ post-petition liens, giving them a $100 million claim. Phase Two found the pre-petition secured liens themselves were valid under Texas law, but held that the last-minute correction affidavits qualified as avoidable preferential transfers. That meant the secured noteholders’ collateral position on the HHK Leases could be unwound.
Phase Three was the money phase. Delaware Trust argued the avoidance claims were worth about $210 million. The secured lenders argued they were worth nothing. On August 3, 2023, Judge Isgur assigned the avoidance claims a hypothetical value of $200 million and allocated 69.73 percent of Mesquite’s equity to unsecured claim holders. The secured and DIP lenders together received the remaining 30.27 percent.
The Fifth Circuit Reversal
The Ad Hoc Group of Senior Secured Noteholders and the DIP Lenders appealed. On May 30, 2025, a unanimous Fifth Circuit panel vacated Judge Isgur’s judgment.
The court read Section 550 of the Bankruptcy Code strictly. Under Section 550(a), a trustee can recover the transferred property or its value, not both. Section 550(d) caps the estate’s recovery at “a single satisfaction.” The Fifth Circuit called Section 550(d) a “restrictor plate” on avoidance powers and described a contrary Florida decision as a “rogue outlier.” Because the secured lenders’ liens had already been effectively returned to the estate through the reorganization plan, awarding an additional $200 million in hypothetical value was, the court held, an illegal double recovery. It rejected the argument that the pandemic-era collapse in oil and gas values justified additional compensation; once the liens came back, the estate’s recovery was complete.
The consequence flowed from the numbers. The DIP lenders’ superpriority claims alone exceeded the stipulated $85 million enterprise value of Mesquite Energy. That meant the DIP lenders were entitled to 100 percent of the reorganized company’s equity, worth roughly $700 million. The 70 percent stake the bankruptcy court had awarded the unsecured creditors disappeared.
Supreme Court Denial
Delaware Trust Company petitioned the U.S. Supreme Court for review as Docket No. 25-208. On November 24, 2025, the Court denied certiorari. Chief Justice Roberts and Justice Alito took no part in the decision. The Fifth Circuit’s ruling stood, and Apollo and the other senior lenders were confirmed as the full owners of Mesquite Energy.
Related Fights Worth Knowing
The Litigation Funding Agreement
Delaware Trust had funded its lien litigation through an agreement with four unsecured creditors, including Benefit Street Partners, Brigade Capital, Avenue Capital, and Taconic Capital, that promised the funders 90 percent of the equity proceeds won in the lien fight. Lake Whillans Fund I L.P. and Clear Harbor challenged the arrangement. On April 30, 2024, Judge Isgur dismissed the claim that the funding agreement impermissibly modified the reorganization plan, but allowed the plaintiffs to amend other claims, including breach of fiduciary duty and unjust enrichment.
The Zero Dark Forty Settlement
Separately, Mesquite Energy sued Sanchez Oil & Gas Corporation over how to divide proceeds from a trade secret settlement. The underlying case involved a cost-reduction program called “Zero Dark Forty” that Sanchez Energy and Sanchez Oil & Gas had jointly developed for Eagle Ford operations. In 2016, former employees moved to Terra Energy Partners and were accused of taking proprietary files. The Terra case settled in 2024. On March 4, 2026, Judge Marialyn Barnard of the Business Court of Texas ruled that Mesquite and Sanchez Oil & Gas co-owned the trade secrets and split the settlement equally. The court also ordered Sanchez Oil & Gas to reimburse Mesquite for half the litigation expenses Sanchez Energy had paid between March 2016 and March 2019, to be deducted from Sanchez Oil & Gas’s share. A 2022 post-bankruptcy settlement between the parties did not bar the claim, the court held, because the settlement funds had not existed until 2024.
Case Closure
Mesquite Energy filed post-confirmation reports through early 2026, covering the quarters ending December 31, 2025, and March 31, 2026. A hearing on January 30, 2026, addressed the remaining lien-related litigation. On June 1, 2026, the bankruptcy court entered a final decree closing the Chapter 11 cases, nearly seven years after Sanchez Energy first filed.