---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-218135"
form_type: "8-K"
ticker: "DINO"
cik: "0001915657"
company_name: "HF Sinclair Corp"
filed_at: "2026-05-12T11:00:18+00:00"
generated_at: "2026-05-12T11:17:14.104599+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# HF Sinclair CEO Timothy Go departs; $4.7M severance, partial equity vesting

## Summary
- Go's employment ended May 11, 2026; receives $4,735,000 cash severance paid over 12 months.
- Partial vesting of equity: 29,616 RSUs vest immediately; 163,609 PSUs remain outstanding subject to performance.
- CFO Atanasov still on leave since Feb 24, 2026; no separation agreement reached yet.
- Go resigned from board; confirms no disagreement over operations, policies, or practices.

## SEC filing metadata
- accession: 0001193125-26-218135
- form_type: 8-K
- ticker: DINO
- cik: 0001915657
- company_name: HF Sinclair Corp
- filed_at: 2026-05-12T11:00:18+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1915657/000119312526218135/0001193125-26-218135-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1915657/000119312526218135/d45151d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-218135
- JSON: https://secwatch.observer/filing/0001193125-26-218135.json
- Plain text: https://secwatch.observer/filing/0001193125-26-218135.txt

## Key facts
- Executive change
  Franklin Myers was appointed as Chief Executive Officer and President at HF Sinclair Corp.
  - Action: appointed
  - Role: Chief Executive Officer and President
  source text: effective February 17, 2026, the Board appointed Mr. Franklin Myers, the Chairperson of the Board, to serve as the Company’s Chief Executive Officer and President on a temporary basis.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1915657/000119312526218135/0001193125-26-218135-index.htm
- Executive change
  Timothy Go resigned as member of the Board of Directors at HF Sinclair Corp.
  - Action: resigned
  - Role: member of the Board of Directors
  source text: In addition, Mr. Go resigned from the Board and agreed that any position or role he had as an agent, officer or director of the Company, its predecessors, its subsidiaries or its affiliates, will end, in each case, effective as of the Separation Date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1915657/000119312526218135/0001193125-26-218135-index.htm
- Executive change
  Timothy Go resigned as Chief Executive Officer and President at HF Sinclair Corp.
  - Action: resigned
  - Role: Chief Executive Officer and President
  source text: On May 11, 2026, the Company and Mr. Go reached a mutually agreeable arrangement and entered into a Separation and Release Agreement (the “ Separation Agreement ”). Under this agreement, Mr. Go’s last day of employment with the Company was May 11, 2026 (the “ Separation Date ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1915657/000119312526218135/0001193125-26-218135-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.