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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 THE SECURITIES EXCHANGE ACT OF 1934

For the month of October 2026

Commission File Number 001-37928

ChipMOS TECHNOLOGIES INC.

(Translation of Registrant’s Name 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.

\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n


		ChipMOS TECHNOLOGIES INC.
		(Registrant)

Date: October 21, 2026	By	/S/ S. J. Cheng
	Name:	S. J. Cheng
	Title:	Chairman & President

Below is the English version of our filing at Market Observation Post System (MOPS) of Taiwan Stock Exchange Corporation (TWSE) on October 21, 2026.

Date of announcement: 2026/10/21

Subject: The acquisition and disposal of machinery equipment and related accessories

Date of events: 2026/10/21

To which item it meets: Article 4, Paragraph 1, Item 20 of the Taiwan Stock Exchange Corporation Procedures for Verification and Disclosure of Material Information of Companies with Listed Securities (pursuant to which it is a material information for the Company to acquire and disposal equipment for business purposes from a party that is not a related party, which transaction amount exceeds NT$500 million)

Statement:

Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): Machinery equipment and related accessories

Date of occurrence of the event: 2026/03/15~2026/10/21

Date of the board of directors resolution: Not applicable

Other approval date: 2026/10/21 (approval level: President of the Company).

Transaction unit amount (e.g. XX square meters, equivalent to XX ping), unit price, and total transaction price:

The acquisition of machinery equipment and related accessories with a total transaction price of NT$1,237,950 thousand.

The disposal of machinery equipment and related accessories with a total transaction price of NT$58,557 thousand.

Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

Trading counterparty: K-SHINE ELECTRONIC CORPORATION

Relation with the Company: None

Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: Not applicable

Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: Not applicable

Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table explaining recognition):

Projected gain: NT$37,904 thousand for disposal of machinery equipment and related accessories per paragraph 5.b.

10.

Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions:

The Company will perform pursuant to the terms and conditions set forth in the purchase orders agreed by both parties.

11.

The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:

The Company has referred to the market value and negotiated through mutual agreement between both parties, and handled in accordance with the internal authorization.

12.

Name of the professional appraisal firm or company and its appraisal price: Not applicable

13.

Name of the professional appraiser: Not applicable

14.

Practice certificate number of the professional appraiser: Not applicable

15.

The appraisal report has a limited price, specific price, or special price: Not applicable

16.

An appraisal report has not yet been obtained: Not applicable

17.

Reason for an appraisal report not being obtained: Not applicable

18.

Reason for any significant discrepancy with the appraisal reports and opinion of the CPA: Not applicable

19.

Name of the CPA firm: Not applicable

20.

Name of the CPA: Not applicable

21.

Practice certificate number of the CPA: Not applicable

22.

Broker and broker’s fee: Not applicable

23.

Concrete purpose or use of the acquisition or disposal: For manufacturing purpose

24.

Any dissenting opinions of directors to the present transaction: Not applicable

25.

Whether the counterparty of the current transaction is a related party: No

26.

Date of ratification by supervisors or approval by the audit committee: Not applicable

27.

The transaction is to acquire a real property or right-of-use asset from a related party: No

28.

The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies: Not applicable

29.

Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of the same regulations: Not applicable

30.

Date on which material information regarding the same event has been previously released: Not applicable

31.

Any other matters that need to be specified: None

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