Chipmos Technologies, Inc.TWSE: 8150

Chipmos Adjusts Cash Dividend Distribution Ratio To Approximately Nt1 23 Per Common Share Or Approximately Us0 82 Per Ads

· Issued by Chipmos Technologies, Inc.

There is no change to any other information disclosed in the original notice filed on May 28, 2025. The dividend was previously approved by the Company's Board and declared on February 25, 2025. The Company submitted a dividend/distribution form to Nasdaq, as notification of the below actions for the Company's American Depositary Shares ('ADRs').

Type of Distribution: Cash Dividend

Declaration Date: May 27, 2025

Ex-Dividend Date: June 27, 2025

ADR Dividend Record Date: June 27, 2025

ADR Dividend Distribution Date: July 25, 2025

ADR books will be closed from June 27 to July 3, 2025

The final dividend amount to be distributed in U.S. dollars will be determined by the Depositary, Citibank, N.A., once it receives the distribution from the Company, which is expected to be on July 18, 2025, converts the amount from New Taiwan Dollars into U.S. Dollars and deducts appropriate taxes and fees.

Any questions regarding the dividend distribution should be directed to Citibank, N.A.'s Tiffany Ma (Tel: +1-973-461-5734 or tiffany.ma@citi.com).

About ChipMOS TECHNOLOGIES INC.:

Forward-Looking Statements

This press release may contain certain forward-looking statements. These forward-looking statements may be identified by words such as 'believes,' 'expects,' 'anticipates,' 'projects,' 'intends,' 'should,' 'seeks,' 'estimates,' 'future' or similar expressions or by discussion of, among other things, strategies, goals, plans or intentions. These statements may include financial projections and estimates and their underlying assumptions, statements regarding tariffs, government policies, global trade environments, pricing, plans, objectives and expectations with respect to future operations, products and services, and statements regarding future performance. Actual results may differ materially in the future from those reflected in forward-looking statements contained in this document, due to various factors. Further information regarding these risks, uncertainties and other factors are included in the Company's most recent Annual Report on Form 20-F filed with the U.S. Securities and Exchange Commission (the 'SEC') and in the Company's other filings with the SEC.

Contact:

In Taiwan

Jesse Huang

ChipMOS TECHNOLOGIES INC.

+886-6-5052388 ext. 7715

IR@chipmos.com

In the U.S.

David Pasquale

Global IR Partners

+1-914-337-8801

dpasquale@globalirpartners.com

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