Amkor Technology Prices $1,000 Million Convertible Senior Notes Offering

Amkor Technology, Inc. (Nasdaq: AMKR) today announced the pricing of its offering of $1,000,000,000 aggregate principal amount of 0.00% convertible senior notes due 2031 (the “notes”) in a private offering to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”). The notes will be fully and unconditionally guaranteed, on a senior, unsecured basis, by each subsidiary of Amkor that currently or in the future guarantees its 5.875% senior notes due 2033 (the “guarantors”). The issuance and sale of the notes are scheduled to settle on May 5, 2026, subject to customary closing conditions. Amkor also granted the initial purchasers of the notes an option to purchase, for settlement within a period of 13 days from, and including, the date the notes are first issued, up to an additional $150,000,000 aggregate principal amount of notes.

The notes will be senior, unsecured obligations of Amkor. The notes will not bear regular interest, and the principal amount of notes will not accrete. The notes will mature on July 15, 2031, unless earlier repurchased, redeemed or converted. Before April 15, 2031, noteholders will have the right to convert their notes only upon the occurrence of certain events. From and after April 15, 2031, noteholders may convert their notes at any time at their election until the close of business on the second scheduled trading day immediately before the maturity date. Amkor will settle conversions in cash and, if applicable, shares of its common stock. The initial conversion rate is 9.4013 shares of common stock per $1,000 principal amount of notes, which represents an initial conversion price of approximately $106.37 per share of common stock. The initial conversion price represents a premium of approximately 52.5% over the last reported sale price of $69.75 per share of Amkor’s common stock on April 30, 2026. The conversion rate and conversion price will be subject to adjustment upon the occurrence of certain events.

The notes will be redeemable, in whole or in part (subject to certain limitations), for cash at Amkor’s option at any time, and from time to time, on or after May 15, 2029 and on or before the 20th scheduled trading day immediately before the maturity date, but only if the last reported sale price per share of Amkor’s common stock exceeds 130% of the conversion price for a specified period of time and certain other conditions are satisfied. The redemption price will be equal to the principal amount of the notes to be redeemed, plus accrued and unpaid special and additional interest, if any, to, but excluding, the redemption date.