---
schema_version: "secwatch.filing_event.v1"
accession: "0001759631-21-000052"
form_type: "8-K"
ticker: "HYLN"
cik: "0001759631"
company_name: "Hyliion Holdings Corp."
filed_at: "2021-08-26T23:59:59+00:00"
generated_at: "2026-06-29T07:37:13.300753+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Hyliion appoints automotive industry veteran Mary Gustanski to Board of Directors

## Summary
- Mary Gustanski, age 59, appointed as Class III director with term expiring at 2023 annual meeting.
- Gustanski is former SVP and CTO of Delphi Technologies with nearly 40 years in automotive electrification.
- She will serve on the Compensation Committee; board size increases to nine directors.
- Compensated on same basis as other non-employee directors; standard indemnification agreement in place.

## SEC filing metadata
- accession: 0001759631-21-000052
- form_type: 8-K
- ticker: HYLN
- cik: 0001759631
- company_name: Hyliion Holdings Corp.
- filed_at: 2021-08-26T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1759631/000175963121000052/0001759631-21-000052-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1759631/000175963121000052/hyln-20210824.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001759631-21-000052
- JSON: https://secwatch.observer/filing/0001759631-21-000052.json
- Plain text: https://secwatch.observer/filing/0001759631-21-000052.txt

## Key facts
- Executive change
  Mary Elizabeth Gustanski was appointed as Director at Hyliion Holdings Corp..
  - Action: appointed
  - Role: Director
  source text: On August 24, 2021, the Board of Directors of Hyliion Holdings Corp. (the “Company”) appointed Mary Elizabeth Gustanski, age 59, to the Board of Directors.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1759631/000175963121000052/0001759631-21-000052-index.htm

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