UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 ~~UNDER~~

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of May 2026

Commission File Number 001-37928

ChipMOS TECHNOLOGIES INC.

(Translation of Registrant’s Name ~~into~~Into English)

No. 1, R&D Rd. 1, Hsinchu Science Park

Hsinchu, Taiwan

Republic of China

(Address of Principal Executive Offices)

(Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.)

Form 20-F ☒ Form 40-F ☐

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Dated: May 26, 2026	ChipMOS TECHNOLOGIES INC. (Registrant)
		ChipMOS TECHNOLOGIES INC.
	By:	/S/ S. J. Cheng
		(Registrant)
Date: May 27, 2026	By	/S/ S. J. Cheng
	Name:	S. J. Cheng
	Title:	Chairman & President

OnContacts:In ~~May~~Taiwan ~~26,~~Jesse ~~2026,~~HuangChipMOS ~~ChipMOS~~ TECHNOLOGIES INC.+886-6-5052388 ~~(the~~ext. ~~“Company”)~~7715[email ~~(Taiwan~~protected] ~~Stock~~In ~~Exchange: 8150 and Nasdaq: IMOS) made a public announcement on~~ the ~~Market~~U.S.David ~~Observation~~PasqualeGlobal ~~Post~~IR ~~System~~Partners+1-914-337-8801[email ~~in Taiwan (“MOPS”) that the Company held the 18th meeting of its 11th Board of Directors (the “Board”), at which time the following matter was resolved:~~protected]

~~Determination~~ChipMOS ofSHAREHOLDERS ~~the~~APPROVE ~~ex-dividend~~CASH ~~record~~DIVIDEND ~~date~~DISTRIBUTION ~~for~~OF ~~common~~NT$1.23 ~~shares~~PER COMMON SHARE OR APPROXIMATELY US$0.78 PER ADS

~~With~~Hsinchu, ~~respect~~Taiwan, toMay ~~resolution 1~~27, ~~the~~ ~~Annual~~2026 ~~Shareholders’~~- ~~Meeting~~ChipMOS ~~resolved~~TECHNOLOGIES ~~that NT$1~~INC.23 ~~per~~(“ChipMOS” ~~common~~or ~~share will be distributed to~~ the “Company’s”) ~~shareholders~~(Taiwan inStock ~~cash~~Exchange: ~~from~~8150 ~~its~~and ~~capital~~Nasdaq: ~~surplus.~~IMOS), ~~The~~an ~~Board~~industry ~~resolved~~leading ~~that~~provider ~~the~~of ~~ex-dividend~~outsourced ~~record~~semiconductor ~~date~~assembly ~~for~~and ~~common~~test ~~shares~~services ~~will be July 5~~(“OSAT”), ~~2026.~~announced ~~Accordingly,~~that ~~pursuant~~at tothe ~~Article 165 of Taiwan~~Company’s ~~Company~~AGM ~~Act,~~on ~~the~~May ~~book closure period will be from July 1 to July 5~~26, 2026. ~~The~~shareholders ~~last~~approved ~~transfer~~a ~~date~~cash ~~before~~dividend ~~the~~distribution ~~book~~from ~~closure~~its ~~period~~capital ~~will~~surplus beof ~~June 30, 2026~~NT$1.23 ~~Any~~per ~~person holding the Company’s~~ common ~~shares~~share ~~who~~or ~~has~~approximately ~~not~~US$0.78 ~~transferred~~per ~~the~~ADS. ~~title~~The ofdividend ~~shares~~was ~~should~~previously ~~complete~~approved ~~the~~by ~~required procedures with~~ the Company’s ~~stock~~Board ~~agency:~~and ~~KGI~~declared ~~Securities~~on ~~Co.,~~February ~~Ltd. (5F~~24, No2026. 2,The ~~Sec.~~Company 1,has ~~Chongqing~~submitted S.a ~~Rd.,~~dividend/distribution ~~Taipei,~~form ~~Taiwan;~~to ~~Tel: +886-2-23892999) by 5:00 p.m.~~Nasdaq, ~~Tuesday, June 30, 2026, in person or by post~~ as ~~per~~notification ~~date~~ of ~~postmark. The cash dividend distribution date will be July 17, 2026. The Company will carry out~~ the ~~process~~below ofactions ~~book~~for ~~closure with data provided by~~ the ~~Taiwan~~Company’s ~~Depository~~American ~~and~~Depositary ~~Clearing~~Shares ~~Corporation~~ (“~~TDCC~~ADRs”) ~~without further notice~~.

•

Type of Distribution: Cash Dividend

•

Declaration Date: May 26, 2026

•

Ex-Dividend Date: June 29, 2026

•

ADR Dividend Record Date: June 29, 2026

•

ADR Dividend Distribution Date: July 24, 2026

•

ADR books will be closed from June 29 to July 2, 2026

•

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 17, 2026, converts the amount from New Taiwan Dollars into U.S. Dollars and deducts appropriate fees.

•

Withholding tax rate decreased from 21% to 0% as cash dividend was made from capital surplus rather than retained earnings.

Any questions regarding the dividend distribution should be directed to Citibank, N.A.’s Tiffany Ma (Tel: +1-973-461-5734 or [email protected]).

About ChipMOS TECHNOLOGIES INC.:

ChipMOS TECHNOLOGIES INC. (“ChipMOS” or the “Company”) (Taiwan Stock Exchange: 8150 and Nasdaq: IMOS) (www.chipmos.com) is an industry leading provider of outsourced semiconductor assembly and test services. With advanced facilities in Hsinchu Science Park, Hsinchu Industrial Park and Southern Taiwan Science Park in Taiwan, ChipMOS is known for its track record of excellence and history of innovation. The Company provides end-to-end assembly and test services to leading fabless semiconductor companies, integrated device manufacturers and independent semiconductor foundries serving virtually all end markets worldwide.

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 current macroeconomic conditions, including the impacts of high inflation, foreign exchange rates and risk of recession, on demand for our products, consumer confidence and financial markets generally; changes in trade regulations, policies, and agreements and the imposition of tariffs that affect our products or operations, including potential new tariffs that may be imposed and our ability to mitigate 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, based on a number of important factors and risks, which are more specifically identified in the Company’s most recent U.S. Securities and Exchange Commission (the “SEC”) filings. 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 SEC and in its other filings with the SEC.

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