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 March 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.

Below is the English version of our filing at Market Observation Post System (MOPS) of Taiwan Stock Exchange Corporation (TWSE) on March 210, 2026.

Date of announcement: 2026/03/0210

Subject: ~~Because~~Announcement of the Company’s ~~securities~~Board ~~reached~~of ~~the~~Directors ~~threshold~~resolution for ~~publication~~acquisition ~~set~~of bybuilding ~~TWSE,~~and ~~Company discloses relevant financial information for investors’ reference.~~facilities

Date of events: 2026/03/0210

To which item it meets: Article 4, Paragraph 1, Item 5120 of the Taiwan Stock Exchange Corporation Procedures for Verification and Disclosure of Material Information of Companies with Listed Securities

Statement:

~~Date~~Name ofand ~~occurrence~~nature of the ~~event~~underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): ~~2026/03/02~~Building and facilities (Located at No. 6, Sec. 2, Huandong Rd., Xinshi Dist., Tainan City)

~~Cause~~Date of occurrence: ~~The~~of ~~Company~~the ~~received~~event: ~~notification from Taiwan Stock Exchange Corporation~~2026/03/10~2026/03/10

~~Financial~~Date ~~and~~of ~~business~~the ~~information~~board of directors resolution: 2026/03/10

Period	Month		Quarter		Recent 4 quarter accumulation
Account	Most recent month(January 2026)(Unaudited)	YoY%	Most recent quarter(2025Q4)(Audit)	YoY%	2025Q1~2025Q4(Audit)
Revenue(NT$ million)	2,290	31.2%	6,521	20.8%	23,933
Net profit before tax(NT$ million)	206	6,766.7%	612	125.8%	587
Profit attributable to owners of parent(NT$ million)	169	2,716.7%	500	115.5%	495
EPS(unit:NT$)	0.24	2,300.0%	0.72	125.0%	0.70

Other approval date: Not applicable

~~Any~~Transaction ~~matters~~unit ~~regarding~~amount to(e.g. ~~“Taiwan~~XX ~~Stock~~square ~~Exchange~~meters, ~~Corporation~~equivalent ~~Procedure~~to ~~for~~XX ~~Verification~~ping), ~~and~~unit ~~Disclosure~~price, ofand ~~Material~~total ~~Information~~transaction ~~of Companies with Listed Securities” Article 4 that need to be specified~~price: ~~None~~

~~Any~~Building ~~matters~~area: ~~regarding~~34,316.15 tosquare ~~“Taiwan~~meters ~~Stock~~(equivalent ~~Exchange Corporation Procedure for Verification and Disclosure of Material Information of Companies with Listed Securities” Article 11 that need~~ to be10,380.64 ~~specified: None~~ping)

~~Please~~Total ~~inquiry~~transaction ~~the items of financial Information on the website of MOPS, and the paths as follow~~amount: NT$880 million

~~Current~~Trading ~~sales~~counterparty ~~revenue/income~~and its relationship with the Company (~~loss):~~if ~~Summaries>Financial~~the ~~Information~~trading ~~applicable~~counterparty ~~after~~is ~~adopting~~a ~~IFRSs~~natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):

~~Historic~~Trading ~~sales revenue per month~~counterpart: ~~Operating~~INNOLUX ~~Statements>Monthly Sales Revenue> Statement of Sales Revenue (after adopting IFRSs)~~ Corporation;

~~Historic~~Relation ~~income~~with ~~or loss (audited/reviewed by~~ the ~~CPA)~~Company: ~~Financial Statements> FINANCIAL STATEMENT after adopting IFRSs>Balance Sheet/Income Statement~~ None

~~Historic~~Where ~~income~~the ortrading ~~loss~~counterparty ~~(self-assessed):~~is ~~Operating~~a ~~Statements>Self-assessed~~related ~~income~~party, orannouncement ~~loss~~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): Not applicable

10.

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

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:

Manner of deciding on this transaction: Price negotiation;

Reference basis for the decision on price: Appraisal report and market price;

Decision-making unit: Board of Directors.

12.

Name of the professional appraisal firm or company and its appraisal price:

China Real Estate Appraiser Firm/China Property Appraising Center CO., LTD.: appraisal value NT$851 million

13.

Name of the professional appraiser:

China Real Estate Appraiser Firm/China Property Appraising Center CO., LTD.: Hsieh,Dian-Ching / Yang,Kuang-Wu

14.

Practice certificate number of the professional appraiser:

China Real Estate Appraiser Firm: (99)TCG_NO.000149

15.

The appraisal report has a limited price, specific price, or special price: No

16.

An appraisal report has not yet been obtained: No

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 operation and production

24.

Any dissenting opinions of directors to the present transaction: None

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: 2026/3/10

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

ChipMOS TECHNOLOGIES INC.

(Registrant)

Date: March 2, 2026

/S/ S. J. Cheng

Date: March 10, 2026

/S/ S. J. Cheng

S. J. Cheng

Chairman & President

Filing Compare · CHIPMOS TECHNOLOGIES INC