KULICKE & SOFFA INDUSTRIES INC

January 22, 2026

The enclosed proxy is solicited by the board of directors of Kulicke and Soffa Industries, Inc. (the “Company”, “K&S”, “we”, “our”). The annual meeting of shareholders of the Company will be held as a virtual meeting on Wednesday, March 4, 2026 at 1:00 PM (Singapore Time) via a live webcast on the internet athttps://event.choruscall.com/mediaframe/webcast.html?webcastid=DAR07z4e (the “annual meeting”). As permitted by rules adopted by the Securities and Exchange Commission (the “SEC”), we are making our proxy statement and 2025 Annual Report to Shareholders (which includes the Company’s Annual Report on Form 10-K) (the “Annual Report”) available electronically via the Internet. On or about January 22, 2026, we will mail to our shareholders a Notice of Internet Availability of Proxy Materials(the “Notice”) containing instructions on how to access this proxy statement and the Annual Report and how to vote. Shareholders who receive the Notice will not receive a printed copy of the proxy materials in the mail unless they so request. If you would like to receive a printed copy of the Company’s proxy materials, please follow the instructions included in the Notice. We will announce preliminary voting results at the annual meeting. We will also disclose voting results on a Current Report on Form 8-K that we will file with the SEC within four business days after the annual meeting. If final voting results are not available to us in time to file a Current Report on Form 8-K within four business days after the annual meeting, we will provide preliminary voting results in the Current Report on Form 8-K and will provide the final results in an amendment to the Current Report on Form 8-K as soon as they become available.