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 April 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.

		ChipMOS TECHNOLOGIES INC.
Dated: April 14, 2026	ChipMOS TECHNOLOGIES INC. (Registrant)
		(Registrant)
	By:	/S/ S. J. Cheng
Date: April 10, 2026	By	/S/ S. J. Cheng
	Name:	S. J. Cheng
	Title:	Chairman & President

~~Contacts:~~This is to announce differences in the Company’s consolidated financial statements prepared in accordance with IFRSs and Taiwan IFRSs for the year ended December 31, 2025.

InUnder ~~TaiwanJesse~~the ~~HuangChipMOS~~IFRS® Accounting Standards that came into effect as endorsed by the Financial Supervisory Commission of the Republic of China (“Taiwan IFRSs”), ChipMOS TECHNOLOGIES INC.~~+886-6-5052388~~ ~~ext.~~(the ~~7715IR@chipmos.com~~“Company”) Inreported the ~~U.S.David~~items ~~PasqualeGlobal~~and IRamounts ~~Partners+1-914-337-8801dpasquale@globalirpartners.com~~in consolidated financial reports for the year ended December 31, 2025 include:

~~ChipMOS~~net ~~REPORTS~~profit ~~23.1%~~attributable ~~YoY~~to ~~INCREASE~~equity INholders ~~MARCH~~of ~~2026~~the ~~REVENUE;~~Company ~~25.4%~~of ~~YoY~~NT$495,117 ~~INCREASE~~thousand, ~~IN 1Q26 REVENUE~~

~~Hsinchu,~~total ~~Taiwan,~~comprehensive ~~April~~income ~~10,~~attributable ~~2026~~to -equity ~~ChipMOS~~holders ~~TECHNOLOGIES~~of ~~INC. (“ChipMOS” or~~ the “Company”) ~~(Taiwan Stock Exchange: 8150 and Nasdaq: IMOS), an industry leading provider~~ of outsourced semiconductor assembly and test services (“OSAT”), today reported its unaudited consolidated revenue for the month of March 2026 and for the first quarter ended March 31, 2026. All U.S. dollar figures cited in this press release are based on the exchange rate of NT$~~32.05 to US$1.00 as of March 31~~581,440 ~~2026.~~thousand,

~~The~~basic ~~Company~~and ~~noted~~diluted itearnings isper ~~benefiting~~share ~~from~~of aNT$0.70 ~~persistent AI-related demand/supply imbalance, with strong revenue growth driven by robust demand for high-value memory solutions, particularly in data center~~ and ~~AI applications~~NT$0.69, ~~which~~respectively; ~~is also improving longer-term visibility.~~and

~~Revenue~~as ~~for the first quarter~~ of ~~2026~~December ~~was NT$6~~31,~~935.6~~ ~~million or US$216.4 million, representing an increase of 6.4% from the fourth quarter of~~ 2025, ~~and an increase of 25.4% from the first quarter of 2025.~~

~~Revenue~~total ~~for~~consolidated ~~the~~liabilities ~~month~~ of ~~March 2026 was~~ NT$221,~~501.6 million or US$78.1 million~~344,058 ~~representing an increase of 16.7% from February 2026~~thousand, ~~and an increase of 23.1% from March 2025.~~

Consolidated Monthly Revenues (Unaudited)
	March 2026	February 2026	March 2025	MoM Change	YoY Change
Revenues (NT$ million)	2,501.6	2,143.6	2,031.6	16.7%	23.1%
Revenues (US$ million)	78.1	66.9	63.4	16.7%	23.1%

equity attributable to equity holders of the Company of NT$24,008,363 thousand.

Consolidated Quarterly Revenues (Unaudited)
	First Quarter2026	Fourth Quarter2025	First Quarter2025	QoQ Change	YoY Change
Revenues (NT$ million)	6,935.6	6,521.1	5,532.3	6.4%	25.4%
Revenues (US$ million)	216.4	203.5	172.6	6.4%	25.4%

For the purpose of filing its 2025 annual report on Form 20-F with the U.S. Securities and Exchange Commission, the Company prepared its 2025 consolidated financial statements in accordance with IFRS® Accounting Standards (“IFRSs”) as issued by the International Accounting Standards Board and reported the items and amounts in consolidated financial reports for the year ended December 31, 2025 include:

~~About~~net ~~ChipMOS~~profit ~~TECHNOLOGIES~~attributable ~~INC.:~~to equity holders of the Company of NT$550,635 thousand,

~~ChipMOS~~total ~~TECHNOLOGIES~~comprehensive ~~INC.~~income ~~(“ChipMOS”~~attributable orto ~~the~~equity ~~“Company”)~~holders ~~(Taiwan~~of ~~Stock~~the ~~Exchange:~~Company ~~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~~NT$634,569 ~~Hsinchu Industrial Park and Southern Taiwan Science Park in Taiwan~~thousand, 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~~basic ~~Statements:~~and diluted earnings per share of NT$0.78 and NT$0.77, respectively; and

~~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~~December ~~other things~~31, ~~strategies~~2025, 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.

total consolidated liabilities of NT$21,365,309 thousand,

equity attributable to equity holders of the Company of NT$23,987,112 thousand.

The major differences between IFRSs and Taiwan IFRSs applied by the Company for its 2025 consolidated financial statements were primarily due to the timing of the recognition of the 5% income tax on unappropriated retained earnings, the accumulated effects of differences carried over from prior years and the accounting treatment for investment accounted for using equity method as the Company did not participate investee’s capital increase which resulted change in shareholding.

For more details, please refer to the Investor Relations section on Company’s website: https://www.chipmos.com/chinese/ir/overview.aspx.

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