---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-165466"
form_type: "8-K"
ticker: "PSIX"
cik: "0001137091"
company_name: "POWER SOLUTIONS INTERNATIONAL, INC."
filed_at: "2023-06-13T23:59:59+00:00"
generated_at: "2026-06-14T01:50:41.068560+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# PSI and HD Hyundai Infracore amend supply agreement: fixed 2023 pricing, extended term to 2026

## Summary
- Addendum #12 sets 2023 prices for HDI engines; future years to be negotiated annually based on raw material costs and volume forecasts.
- Supply agreement term extended from Dec 31, 2023 to Dec 31, 2026, with automatic one-year renewals unless 12-month notice given.
- Late payment charge added for overdue invoices; confidential pricing details redacted from public filing.
- Covers multiple engine models including 8.1L, 11.1L, 14.6L, 18.3L, 21.9L.

## SEC filing metadata
- accession: 0001193125-23-165466
- form_type: 8-K
- ticker: PSIX
- cik: 0001137091
- company_name: POWER SOLUTIONS INTERNATIONAL, INC.
- filed_at: 2023-06-13T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1137091/000119312523165466/0001193125-23-165466-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1137091/000119312523165466/d474513d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-165466
- JSON: https://secwatch.observer/filing/0001193125-23-165466.json
- Plain text: https://secwatch.observer/filing/0001193125-23-165466.txt

## Key facts
- Material Agreements
  POWER SOLUTIONS INTERNATIONAL, INC. entered into Addendum #12 with HD Hyundai Infracore Co., Ltd. f/k/a Hyundai Doosan Infracore Co., Ltd. ("Doosan") (effective 2023-06-08).
  - Action: entry
  - Agreement: supply
  - Counterparty: HD Hyundai Infracore Co., Ltd. f/k/a Hyundai Doosan Infracore Co., Ltd. ("Doosan")
  - Effective: 2023-06-08
  source text: On June 8, 2023, Power Solutions International, Inc. (the “Company”) and HD Hyundai Infracore Co., Ltd. f/k/a Hyundai Doosan Infracore Co., Ltd. (“Doosan”) entered into Addendum #12 (the “Addendum”) to the Supply Agreement, dated as of December 11, 2007 (the “Supply Agreement”), by and between Doosan and the Company, as amended from time to time.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1137091/000119312523165466/0001193125-23-165466-index.htm

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