---
schema_version: "secwatch.filing_event.v1"
accession: "0001759631-21-000040"
form_type: "8-K"
ticker: "HYLN"
cik: "0001759631"
company_name: "Hyliion Holdings Corp."
filed_at: "2021-08-16T23:59:59+00:00"
generated_at: "2026-06-29T10:07:15.047853+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Hyliion hires Dennis M. Gallagher as COO effective Aug 16, 2021, with $500K base salary

## Summary
- Dennis M. Gallagher appointed COO, effective August 16, 2021; previously President of Jacobs Vehicle Systems.
- Employment agreement: three-year term, annual base salary $500,000, target annual cash bonus 75% of base.
- Sign-on bonus of $100,000 (repayable if terminated for cause or leaves within one year).
- Equity grants: $235,324 immediate vested stock award + $441,606 three-year vest stock award; annual time-based RSU target $700,000.
- One-time performance-based RSU award with target of 250,000 shares vesting based on criteria through Dec 31, 2024.

## SEC filing metadata
- accession: 0001759631-21-000040
- form_type: 8-K
- ticker: HYLN
- cik: 0001759631
- company_name: Hyliion Holdings Corp.
- filed_at: 2021-08-16T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1759631/000175963121000040/0001759631-21-000040-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1759631/000175963121000040/hyln-20210810.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001759631-21-000040
- JSON: https://secwatch.observer/filing/0001759631-21-000040.json
- Plain text: https://secwatch.observer/filing/0001759631-21-000040.txt

## Key facts
- Executive change
  Dennis M. Gallagher was appointed as Chief Operating Officer at Hyliion Holdings Corp..
  - Action: appointed
  - Role: Chief Operating Officer
  source text: On August 10, 2021, Hyliion Holdings Corp. (the “Company,” “its,” “we,” “our,” or “us”) entered into an employment agreement, effective August 16, 2021, with Dennis M. Gallagher who will serve as our Chief Operating Officer.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1759631/000175963121000040/0001759631-21-000040-index.htm

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