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AI brief of an SEC Form 8-K · HF Sinclair (DINO)

HF Sinclair terminates CFO Atanas Atanasov, effective immediately

Neutral Impact 4 of 5 leadership Written later

HF Sinclair terminated Executive Vice President and Chief Financial Officer Atanas Atanasov on May 13, 2026, effective immediately. Atanasov had been on leave since February 24, 2026, and Vivek Garg has served as acting CFO since that date, so the company is now moving from an interim arrangement to a termination.

Key points

  • Termination of Atanas Atanasov as EVP and Chief Financial Officer, effective May 13, 2026
  • Atanasov may receive severance under the Company's Severance Pay Plan if he meets its conditions
  • Atanasov on leave since February 24, 2026; Vivek Garg serving as acting CFO since that date
  • Filing does not name a permanent successor CFO

The filing

CompanyHF Sinclair (DINO)
Form8-K, current report
Filed with the SECMay 13, 2026, 5:18 PM ET
Accession number0001628280-26-034691

Items reported: 5.02 Director / Officer Change

Read the filing on SEC.gov ↗

Written by AI (Anthropic Claude, claude-haiku-5-5) on Nov 8, 2026, 1:11 AM ET, from the text of the filing and its press-release exhibits only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on May 13, 2026.

Briefs are written by AI from the filing text (each brief's own page names the model) and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the model's reading of the filing for shareholders, not a price forecast. Not investment advice.