---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-23-013621"
form_type: "8-K"
ticker: "DK"
cik: "0001694426"
company_name: "Delek US Holdings, Inc."
filed_at: "2023-03-24T23:59:59+00:00"
generated_at: "2026-06-17T16:48:13.646060+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Delek US announces senior leadership changes; COO and President of Refining depart

## Summary
- Joseph Israel named EVP Operations (March 27); Tommy Chavez named SVP Refining (April 10).
- Todd O'Malley (EVP/COO) resigns effective Sept 22, 2023; Nithia Thaver (EVP/Pres Refining) departs May 21.
- CFO Reuven Spiegel's employment extended to Dec 31, 2024; base salary increased to $600,000.
- Spiegel's target bonus set at 90% of base; granted $1.1M RSUs split time- and performance-vesting.

## SEC filing metadata
- accession: 0001140361-23-013621
- form_type: 8-K
- ticker: DK
- cik: 0001694426
- company_name: Delek US Holdings, Inc.
- filed_at: 2023-03-24T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1694426/000114036123013621/0001140361-23-013621-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1694426/000114036123013621/brhc10050175_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-23-013621
- JSON: https://secwatch.observer/filing/0001140361-23-013621.json
- Plain text: https://secwatch.observer/filing/0001140361-23-013621.txt

## Key facts
- Executive change
  Todd O'Malley resigned as Executive Vice President and Chief Operating Officer at Delek US Holdings, Inc..
  - Action: resigned
  - Role: Executive Vice President and Chief Operating Officer
  source text: On March 21, 2023, Todd O’Malley, the Company’s Executive Vice President and Chief Operating Officer, resigned to pursue other opportunities and will remain with the company until September 22, 2023 to ensure a smooth transition.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1694426/000114036123013621/0001140361-23-013621-index.htm
- Executive change
  Tommy Chavez was appointed as Senior Vice President, Refining at Delek US Holdings, Inc..
  - Action: appointed
  - Role: Senior Vice President, Refining
  source text: Tommy Chavez will be named Senior Vice President, Refining, effective April 10, 2023, and will oversee refining operations at the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1694426/000114036123013621/0001140361-23-013621-index.htm
- Executive change
  Nithia Thaver departed as Executive Vice President, President of Refining at Delek US Holdings, Inc..
  - Action: announced departure
  - Role: Executive Vice President, President of Refining
  source text: On March 23, 2023, Nithia Thaver, the Company’s Executive Vice President, President of Refining, announced he will depart the company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1694426/000114036123013621/0001140361-23-013621-index.htm
- Executive change
  Joseph Israel was appointed as Executive Vice President, Operations at Delek US Holdings, Inc..
  - Action: appointed
  - Role: Executive Vice President, Operations
  source text: Joseph Israel will join the Company as Executive Vice President, Operations, effective March 27, 2023, and will be responsible for refining operations at the Company and logistics operations at Delek Logistics Partners, LP.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1694426/000114036123013621/0001140361-23-013621-index.htm

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