HF Sinclair Corp

Commitment and Contingency Reserves

In the ordinary course of business, we may become party to legal, regulatory or administrative proceedings or governmental investigations, including environmental and other matters. Damages or penalties may be sought from us in some matters and certain matters may require years to resolve. While the outcome and impact of these proceedings and investigations on us cannot be predicted with certainty, based on advice of counsel and information currently available to us, management believes that the resolution of these proceedings and investigations through settlement or adverse judgment will not either individually or in the aggregate have a material adverse effect on our financial condition, results of operations or cash flows.

The environmental proceedings are reported to comply with SEC regulations which require us to disclose proceedings arising under provisions regulating the discharge of materials into the environment or protecting the environment when a governmental authority is party to the proceedings and such proceedings involve potential monetary sanctions that we reasonably believe could exceed $1 million or more.

Environmental Matters

Puget Sound

HF Sinclair Puget Sound Refining LLC (“HFS Puget Sound”) has been engaged in discussions with, and has responded to document requests from, the Northwest Clean Air Agency (“NWCAA”), the Environmental Protection Agency (“EPA”) and the Department of Justice (collectively, the “PSR Matter Government Agencies”) regarding HFS Puget Sound’s compliance with the Clean Air Act (“CAA”), Emergency Planning and Community Right-to-Know Act (“EPCRA”) and related regulations, and similar Washington laws and regulations, at its Puget Sound Refinery. HFS Puget Sound acquired the Puget Sound Refinery from Equilon Enterprises LLC dba Shell Oil Products US (“SOPUS”) on November 1, 2021. The discussions with the PSR Matter Government Agencies have included the following topics: (a) an information request issued in March 2022 by the EPA, pursuant to CAA Section 114, covering periods of ownership of the Puget Sound Refinery by both HFS Puget Sound and SOPUS; (b) a Notice of Violation issued by the EPA to SOPUS and HFS Puget Sound on September 29, 2023, alleging violations of the CAA, EPCRA and the Pollution Prevention Act; and (c) the PSR Matter Government Agencies’ proposed injunctive relief terms presented to SOPUS and HFS Puget Sound on June 28 and July 15, 2024, covering various process units at Puget Sound Refinery to address the alleged noncompliance. On October 31, 2024, HFS Puget Sound presented its counteroffer to the PSR Matter Government Agencies’ proposed injunctive relief terms. HFS Puget Sound believes that it is entitled to indemnification for certain of the matters described above.

HFS Puget Sound is awaiting a response from the PSR Matter Government Agencies to its October 31, 2024 counteroffer to resolve these issues.

At this time, no penalties have been demanded, and it is too early to predict the outcome of this matter.

Renewable Fuel Standard

On April 7, 2022, the EPA issued a decision reversing the grant of small refinery exemptions for our Woods Cross, Utah (the “Woods Cross Refinery”) and Cheyenne, Wyoming (the “Cheyenne Refinery”) refineries for the 2018 compliance year. On June 3, 2022, the EPA issued a decision reversing the grant of small refinery exemptions for our Woods Cross Refinery and Cheyenne Refinery for the 2016 compliance year and denying small refinery exemption petitions for our Woods Cross Refinery and Cheyenne Refinery for the 2019 and 2020 compliance years.

Certain of our subsidiaries pursued legal challenges to the EPA’s decisions to deny small refinery exemptions for the 2016, 2018, 2019 and 2020 compliance years. The first lawsuit, filed against the EPA on May 6, 2022, before the U.S. Court of Appeals for the DC Circuit (the “DC Circuit”), sought to have the EPA’s reversal of our 2018 small refinery exemption petitions overturned. The second lawsuit, filed against the EPA on August 5, 2022 before the DC Circuit, sought to have the EPA’s reversal of our 2016 small refinery exemption petitions overturned and to have the EPA’s denial of our 2019 and 2020 small refinery exemption petitions reversed.

In addition, for both the 2016 and 2018 compliance years, pursuant to the June 2022 and April 2022 decisions, the EPA established an alternative compliance demonstration for small refineries pursuant to which the EPA is not imposing any obligations for the small refineries whose exemptions were reversed. On June 24, 2022, Growth Energy filed two lawsuits in the DC Circuit against the EPA challenging the alternative compliance demonstration for the 2016 and 2018 compliance years. On July 25, 2022, certain of our subsidiaries intervened on behalf of the EPA to aid the defense of the EPA’s alternative compliance demonstration decision.

On July 26, 2024, the DC Circuit issued a favorable decision vacating the EPA’s denial of all of our small refinery exemption petitions, finding the denial to be unlawful. The DC Circuit remanded the small refinery exemption petitions to the EPA for new determination. The DC Circuit also upheld the alternative compliance demonstration and denied Growth Energy’s challenge.

On August 22, 2025, the EPA granted, in whole or in part, small refinery exemption requests for our Woods Cross Refinery, our Cheyenne Refinery, our refinery in Casper, Wyoming (the “Casper Refinery”), and our refinery in Sinclair, Wyoming (the “Parco Refinery”) for various compliance years from 2019 to 2024. The EPA also denied, in whole or in part, small refinery exemption requests for the Cheyenne Refinery, the Woods Cross Refinery, the Casper Refinery, and the Parco Refinery for various compliance years from 2019 to 2024.

In October 2025, certain of our subsidiaries filed lawsuits in the DC Circuit to overturn the EPA’s August 2025 denials and other actions. These lawsuits remain pending, and we are unable to estimate the costs we may incur, if any, at this time.

Other

We are a party to various other litigation and proceedings that we believe, based on the advice of counsel, will not either individually or in the aggregate have a materially adverse impact on our financial condition, results of operations or cash flows.