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  4. [8-K] HF Sinclair Corp Reports Material Event

HF Sinclair (DINO) ousts CFO Atanas Atanasov; acting finance chief in place

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
8-K

Rhea-AI Filing Summary

HF Sinclair Corporation terminated its Executive Vice President and Chief Financial Officer, Atanas Atanasov, effective May 13, 2026. If he satisfies the conditions of the company’s Severance Pay Plan, he will receive the benefits provided under that plan, as described in the March 31, 2026 proxy statement.

The filing notes that Atanasov had been on leave from his duties since February 24, 2026. Since that date, Vice President, Chief Accounting Officer and Controller Vivek Garg has been serving as acting Chief Financial Officer, providing continuity in the company’s finance leadership.

Positive

  • None.

Negative

  • Termination of CFO: HF Sinclair terminated Executive Vice President and Chief Financial Officer Atanas Atanasov, a senior finance leader, effective May 13, 2026, which may raise concerns about leadership stability until a permanent replacement is named.

Insights

HF Sinclair’s CFO is terminated, with an acting CFO already in place.

HF Sinclair Corporation has ended the employment of its Executive Vice President and Chief Financial Officer, Atanas Atanasov, effective May 13, 2026. The move formalizes a leadership change after he had been on leave since February 24, 2026.

The company had previously appointed Vice President, Chief Accounting Officer and Controller Vivek Garg as acting Chief Financial Officer, which helps maintain continuity over financial reporting and controls. Any severance for Atanasov will be governed by the existing Severance Pay Plan detailed in the March 31, 2026 proxy statement.

This kind of senior finance departure can be meaningful for investors because the CFO oversees capital allocation and financial disclosures. The longer-term implications will depend on HF Sinclair’s subsequent disclosures about permanent leadership appointments and any updates in future SEC filings.

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers Governance
Key personnel changes including departures, elections, or appointments of directors and executive officers.
CFO termination effective date May 13, 2026 Employment of Executive Vice President and CFO Atanas Atanasov terminated
CFO leave start date February 24, 2026 Date Atanas Atanasov went on leave from duties
10-K filing reference date February 27, 2026 Annual Report on Form 10-K disclosing Atanasov’s leave
Proxy statement filing date March 31, 2026 Definitive proxy describing Severance Pay Plan
Acting CFO appointment effective date February 24, 2026 Date Vivek Garg became acting Chief Financial Officer
Executive Vice President financial
"terminated the employment of Mr. Atanas Atanasov as Executive Vice President and Chief Financial Officer"
An executive vice president is a high-ranking leader within a company who oversees major parts of its operations or strategies. Think of them as senior managers responsible for important areas, similar to a vice principal in a school hierarchy. Their role matters to investors because they help guide the company's success and decision-making at the top level.
Chief Financial Officer financial
"terminated the employment of Mr. Atanas Atanasov as Executive Vice President and Chief Financial Officer"
A Chief Financial Officer (CFO) is the person in charge of a company's money and financial planning. They decide how to spend, save, and invest funds to help the company grow and stay stable. Their role is important because good financial decisions keep the company healthy and successful.
Severance Pay Plan financial
"If Mr. Atanasov meets the conditions of the Company’s Severance Pay Plan, he will receive the severance benefits"
definitive Proxy Statement regulatory
"in the Company’s definitive Proxy Statement filed with the Securities and Exchange Commission on March 31, 2026"
A Definitive Proxy Statement is a detailed document that a company sends to its shareholders before a big meeting, like voting on important decisions. It explains what's being voted on and gives important information so shareholders can make informed choices. It matters because it helps shareholders understand and participate in key company decisions.
acting Chief Financial Officer financial
"appointed Mr. Vivek Garg ... to serve as the Company’s acting Chief Financial Officer"
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Understanding 8-K Material Events →
0001915657falseChicago Stock Exchange, Inc.00019156572026-05-132026-05-130001915657dino:NewYorkStockExchangeMember2026-05-132026-05-130001915657dino:NYSETexasInc.Member2026-05-132026-05-13


UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
___________________

FORM 8-K
CURRENT REPORT

Pursuant to Section 13 or 15(d)
of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 13, 2026
___________________

HF SINCLAIR CORPORATION
(Exact name of Registrant as specified in its charter)
Delaware001-4132587-2092143
(State or other jurisdiction of incorporation)(Commission File Number)
(I.R.S. Employer Identification Number)
2323 Victory Avenue, Suite 1400
Dallas, TX
75219
(Address of principal executive offices)(Zip code)
Registrant’s telephone number, including area code: (214) 871-3555
Not applicable
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:
Title of each classTrading Symbol(s)Name of each exchange on which registered
Common Stock $0.01 par valueDINONew York Stock Exchange
Common Stock $0.01 par valueDINO
NYSE Texas, Inc.

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging growth company        ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.     ☐   


Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.


On May 13, 2026, HF Sinclair Corporation (the “Company”) terminated the employment of Mr. Atanas Atanasov as Executive Vice President and Chief Financial Officer of the Company, effective immediately. If Mr. Atanasov meets the conditions of the Company’s Severance Pay Plan, he will receive the severance benefits to which he is entitled thereunder. For a description of the Company’s Severance Pay Plan, see “Executive Compensation-Potential Payments Upon Termination or Change in Control” in the Company’s definitive Proxy Statement filed with the Securities and Exchange Commission (the “SEC”) on March 31, 2026. As previously reported on the Company’s Annual Report on Form 10-K filed with the SEC on February 27, 2026, Mr. Atanasov has been on leave from his duties since February 24, 2026. As previously reported, effective February 24, 2026, the Board of Directors of the Company appointed Mr. Vivek Garg, the Company’s Vice President, Chief Accounting Officer and Controller, to serve as the Company’s acting Chief Financial Officer.


SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
HF SINCLAIR CORPORATION
By:/s/Eric L. Nitcher
Eric L. Nitcher
Executive Vice President, General Counsel


Date: May 13, 2026


Source: View Original Filing on SEC EDGAR

FAQ

What did HF Sinclair (DINO) announce about its Chief Financial Officer?

HF Sinclair terminated Executive Vice President and Chief Financial Officer Atanas Atanasov, effective May 13, 2026. He had been on leave since February 24, 2026, and this filing formally ends his employment with the company.

Who is serving as acting CFO of HF Sinclair (DINO) after Atanas Atanasov’s termination?

HF Sinclair’s acting Chief Financial Officer is Vivek Garg, the company’s Vice President, Chief Accounting Officer and Controller. He was appointed acting CFO effective February 24, 2026, when Atanasov went on leave from his duties.

Will former HF Sinclair (DINO) CFO Atanas Atanasov receive severance benefits?

Atanas Atanasov may receive severance benefits if he meets the conditions of HF Sinclair’s Severance Pay Plan. The filing states he will be entitled to the plan’s benefits only if those specified conditions are satisfied.

Where can investors find details on HF Sinclair (DINO) Severance Pay Plan?

Details of HF Sinclair’s Severance Pay Plan are described in the “Executive Compensation-Potential Payments Upon Termination or Change in Control” section of its definitive proxy statement filed with the SEC on March 31, 2026.

When did HF Sinclair (DINO) first disclose that its CFO was on leave?

HF Sinclair disclosed in its Form 10-K filed February 27, 2026 that Atanas Atanasov had been on leave since February 24, 2026. The May 13, 2026 filing now confirms his employment has been terminated.

Filing Exhibits & Attachments

4 documents

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