---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-273032"
form_type: "8-K"
ticker: "TSPH"
cik: "0001823593"
company_name: "TuSimple Holdings Inc."
filed_at: "2022-10-31T23:59:59+00:00"
generated_at: "2026-06-22T21:52:51.264355+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# TuSimple terminates CEO Xiaodi Hou amid Audit Committee investigation; search for new CEO begins

## Summary
- CEO Xiaodi Hou terminated as CEO, President, CTO and Chairman effective Oct 30, 2022; interim CEO Ersin Yumer appointed.
- Audit Committee probe found ~$300k in paid hours spent on Hydron (related party) and confidential info shared without approval.
- TuSimple reaffirms FY2022 ending cash guidance of ~$950M; Q3 results released Oct 31 after market close.
- Board engages Russell Reynolds to find permanent CEO; Brad Buss becomes Chairman.

## SEC filing metadata
- accession: 0001193125-22-273032
- form_type: 8-K
- ticker: TSPH
- cik: 0001823593
- company_name: TuSimple Holdings Inc.
- filed_at: 2022-10-31T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 5.02, 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1823593/000119312522273032/0001193125-22-273032-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1823593/000119312522273032/d395238d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-273032
- JSON: https://secwatch.observer/filing/0001193125-22-273032.json
- Plain text: https://secwatch.observer/filing/0001193125-22-273032.txt

## Key facts
- Executive change
  Ersin Yumer was appointed as interim Chief Executive Officer and President at TuSimple Holdings Inc..
  - Action: appointed
  - Role: interim Chief Executive Officer and President
  source text: The Company also announced that, effective as of the same date, the Board appointed Dr. Ersin Yumer, age 38, as interim Chief Executive Officer and President of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1823593/000119312522273032/0001193125-22-273032-index.htm
- Executive change
  Xiaodi Hou was terminated as Chief Executive Officer, President, Chief Technology Officer and Chairman at TuSimple Holdings Inc..
  - Action: terminated
  - Role: Chief Executive Officer, President, Chief Technology Officer and Chairman
  source text: On October 31, 2022, TuSimple Holdings Inc. (the “Company” or “TuSimple”) announced that the Board of Directors of the Company (the “Board”) terminated the employment of Xiaodi Hou as the Chief Executive Officer, President and Chief Technology Officer of the Company and removed Dr. Hou from his position as Chairman of the Board, in each case, effective as of October 30, 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1823593/000119312522273032/0001193125-22-273032-index.htm

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