Business Context and Reporting Period
This Form 8-K filing by Amkor Technology, Inc. (AMKR) reports a material definitive agreement and debt refinancing activity dated September 22, 2025. The company, a Delaware corporation, executed a debt swap strategy involving the issuance of new senior notes and the simultaneous redemption of existing senior notes.
Key Financial Metrics and Debt Structure
- New Debt Issuance: Issued $500,000,000 aggregate principal amount of 5.875% Senior Notes due 2033 (the "2033 Notes").
- Debt Redemption: Announced redemption of all $400,000,000 aggregate principal amount of outstanding 6.625% Senior Notes due 2027 (the "2027 Notes").
- Net Debt Impact: The transaction results in a net increase in principal debt of $100,000,000.
- Interest Rate Change: The new notes carry a coupon rate of 5.875%, replacing the redeemed notes which carried a rate of 6.625%.
- Liquidity and Funding: The redemption of the 2027 Notes is funded directly by the proceeds from the issuance of the 2033 Notes.
- Maturity Profile: The 2033 Notes mature on October 1, 2033, extending the company's debt maturity horizon by six years compared to the redeemed 2027 Notes.
Material Changes Versus Prior Period
The primary material change is the restructuring of the company's senior unsecured debt obligations. By replacing the 2027 Notes with the 2033 Notes, the company has:
- Reduced its weighted average interest cost on this specific tranche of debt by 75 basis points (from 6.625% to 5.875%).
- Extended the maturity date of the refinanced portion of the debt from 2027 to 2033.
- Increased total outstanding principal by $100 million, likely to provide additional liquidity or fund operations beyond the refinanced amount.
Guidance, Outlook, and Material Terms
Redemption Terms: The 2027 Notes will be redeemed on October 9, 2025, at a price of 100% of the principal amount plus accrued and unpaid interest.
2033 Notes Features:
- Ranking: Senior unsecured obligations.
- Guarantees: Initially guaranteed by Guardian Assets, Inc. and required to be guaranteed by direct and indirect wholly-owned domestic subsidiaries that guarantee the U.S. senior secured credit facility.
- Optional Redemption:
- Pre-October 1, 2028: Redeemable at 100% principal plus a "make-whole" premium. Up to 40% may be redeemed with equity proceeds at 105.875% of principal.
- Post-October 1, 2028: Redeemable at descending prices starting at 102.938% of principal.
- Change of Control: Triggers a mandatory repurchase offer at 101% of principal plus accrued interest.
- Covenants: Limits on incurring debt at non-guarantor subsidiaries, incurring liens, sale-leaseback transactions, and mergers/conveyances of substantially all assets.
Events of Default: Include failure to pay interest (30-day grace period), failure to pay principal, failure to meet change of control obligations, covenant breaches (60-day grace period), cross-defaults on indebtedness over $100 million, unpaid judgments over $100 million, and bankruptcy/insolvency.
Investor Verification Checklist
- Verify the exact closing date and settlement of the $500 million 2033 Notes issuance.
- Confirm the final redemption price and accrued interest calculation for the $400 million 2027 Notes redemption on October 9, 2025.
- Review the updated debt maturity schedule to reflect the extension of $400 million from 2027 to 2033 and the addition of $100 million new debt.
- Assess the impact of the new covenants on the company's ability to incur additional debt or liens at non-guarantor subsidiaries.
- Monitor the company's cash flow to ensure sufficient liquidity for the semi-annual interest payments on the new notes, beginning April 1, 2026.