---
schema_version: "secwatch.filing_event.v1"
accession: "0001047127-25-000184"
form_type: "8-K"
ticker: "AMKR"
cik: "0001047127"
company_name: "AMKOR TECHNOLOGY, INC."
filed_at: "2025-09-22T23:59:59+00:00"
generated_at: "2026-05-17T05:56:25.306035+00:00"
event_type: "debt"
sentiment: "positive"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Amkor issues $500M 5.875% notes due 2033, redeems $400M 6.625% notes due 2027

## Summary
- Issued $500M aggregate principal of 5.875% Senior Notes due October 1, 2033; interest payable semi-annually April 1 and October 1 starting April 2026.
- Called all $400M of 6.625% Senior Notes due 2027 for redemption on October 9, 2025 at 100% of principal plus accrued interest.
- Net proceeds from 2033 Notes will fund 2027 redemption, fees/expenses, and general corporate purposes; temporarily invested in short-term securities.
- New notes are senior unsecured, initially guaranteed by Guardian Assets Inc.; subject to make-whole call prior to Oct 1, 2028 and step-down prices thereafter.

## SEC filing metadata
- accession: 0001047127-25-000184
- form_type: 8-K
- ticker: AMKR
- cik: 0001047127
- company_name: AMKOR TECHNOLOGY, INC.
- filed_at: 2025-09-22T23:59:59+00:00
- event_type: debt
- sentiment: positive
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.01, 2.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1047127/000104712725000184/0001047127-25-000184-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1047127/000104712725000184/amkr-20250922.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001047127-25-000184
- JSON: https://secwatch.observer/filing/0001047127-25-000184.json
- Plain text: https://secwatch.observer/filing/0001047127-25-000184.txt

## Key facts
- Debt Financings
  AMKOR TECHNOLOGY, INC. incurred senior notes of $500,000,000 aggregate principal amount with U.S. Bank Trust Company, National Association at 5.875% per year maturing October 1, 2033.
  - Instrument: senior notes
  - Principal: $500,000,000 aggregate principal amount
  - Counterparty: U.S. Bank Trust Company, National Association
  - Rate: 5.875% per year
  - Maturity: October 1, 2033
  - Event: incurrence
  source text: On September 22, 2025, the Company entered into the Indenture relating to the issuance by the Company of $500,000,000 aggregate principal amount of the 2033 Notes.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1047127/000104712725000184/0001047127-25-000184-index.htm

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