---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-041999"
form_type: "8-K"
ticker: "DINO"
cik: "0001915657"
company_name: "HF Sinclair Corp"
filed_at: "2023-02-17T23:59:59+00:00"
generated_at: "2026-06-19T08:22:01.969943+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "medium"
source: SEC EDGAR
---

# HF Sinclair board adopts amended by-laws effective Feb 15, 2023

## Summary
- Amended by-laws revise director nomination procedures to address new SEC Rule 14a-19.
- Amended by-laws require officers to submit resignations in writing.
- Amended by-laws make administrative updates to conform with Delaware General Corporation Law.

## SEC filing metadata
- accession: 0001193125-23-041999
- form_type: 8-K
- ticker: DINO
- cik: 0001915657
- company_name: HF Sinclair Corp
- filed_at: 2023-02-17T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: medium
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1915657/000119312523041999/0001193125-23-041999-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1915657/000119312523041999/d796869d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-041999
- JSON: https://secwatch.observer/filing/0001193125-23-041999.json
- Plain text: https://secwatch.observer/filing/0001193125-23-041999.txt

## Key facts
- Governance Changes
  HF Sinclair Corp: Amended and restated by-laws to revise director nomination procedures, clarify meeting powers, update definitions, require officer resignations, adopt gender-neutral pronouns, and make administrative changes (effective 2023-02-15).
  - Change: bylaw amendment
  - Effective: 2023-02-15
  source text: On February 15, 2023, the Board of Directors of HF Sinclair Corporation (the “ Company ”) approved the Company’s Second Amended and Restated By-laws (the “ Amended and Restated By-laws ”), effective as of such date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1915657/000119312523041999/0001193125-23-041999-index.htm

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