ChipMOS (IMOS) invests NT$688.9M in new manufacturing equipment

Rhea-AI Filing Summary

ChipMOS TECHNOLOGIES INC. reported the acquisition of machinery equipment and related accessories for manufacturing use. The total transaction price is NT$688,901 thousand, reflecting a significant capital investment in production capacity.

The equipment was purchased from ADVANTEST TAIWAN INC., which has no related-party relationship with the company. The transaction, covering events from 2025/04/30 to 2026/04/02, was approved on 2026/04/02 by the company’s President in line with internal authorization procedures.

Key Figures

Total transaction price: NT$688,901 thousand Event period: 2025/04/30–2026/04/02 Approval date: 2026/04/02 +1 more

4 metrics

Total transaction price NT$688,901 thousand Acquisition of machinery equipment and accessories

Event period 2025/04/30–2026/04/02 Date of occurrence of the event

Approval date 2026/04/02 Approved by President of the Company

Regulatory item reference Article 4, Paragraph 1, Item 20 TWSE Procedures for Verification and Disclosure of Material Information

Key Terms

Market Observation Post System (MOPS), related party, Regulations Governing the Acquisition and Disposal of Assets by Public Companies, right-of-use asset, +1 more

5 terms

Market Observation Post System (MOPS) regulatory

"Below is the English version of our filing at Market Observation Post System (MOPS) of Taiwan Stock Exchange Corporation"

related party financial

"Where the trading counterparty is a related party, announcement shall also be made of the reason"

A related party is a person or organization with close ties to a company — for example major shareholders, board members, executives, their family, or businesses they control — that can influence decisions or enter into transactions with the company. Investors watch related‑party dealings because they can create conflicts of interest or non‑market terms that affect fairness, the company’s finances and transparency; think of it like buying or selling something to a family member rather than on the open market.

Regulations Governing the Acquisition and Disposal of Assets by Public Companies regulatory

"The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by Public Companies"

right-of-use asset financial

"The transaction is to acquire a real property or right-of-use asset from a related party"

A right-of-use asset is the value a company records on its balance sheet for the practical use of something it leases — like the benefit of living in a rented office or using leased equipment for a set period. Investors care because it turns many leases into on-balance-sheet assets and matching liabilities, which can change reported leverage, asset base and performance metrics much like taking on a loan would.

material information regulatory

"Procedures for Verification and Disclosure of Material Information of Companies with Listed Securities"

Material information is any fact or development that a reasonable investor would likely consider important when deciding whether to buy, sell or hold a stock—like a new product that could change a company’s prospects or a hidden debt that could hurt its finances. It matters because timely, accurate disclosure of such facts helps ensure fair prices and prevents surprises that can sharply move a stock; think of it as information that can tip the scale in an investment decision.

Form 6-K: How Foreign Companies Report to the SEC →

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 April 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.

						ChipMOS TECHNOLOGIES INC.
						(Registrant)
Date: April 2, 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 April 2, 2026.

Date of announcement: 2026/04/02

Subject: The acquisition of machinery equipment and related accessories

Date of events: 2026/04/02

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

Statement:

1.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

2.Date of occurrence of the event: 2025/04/30~2026/04/02

3.Date of the board of directors resolution: Not applicable

4.Other approval date: 2026/04/02 (approval level: President of the Company).

5.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$688,901 thousand.

6.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: ADVANTEST TAIWAN INC.

Relation with the Company: None

7.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

8.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

9.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:

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

FAQ

What asset did ChipMOS (IMOS) acquire according to the April 2026 filing?

ChipMOS acquired machinery equipment and related accessories for manufacturing purposes. This represents investment in production capacity, intended to support its operations and future output in line with internal authorization procedures.

What was the total transaction price of ChipMOS (IMOS) equipment purchase?

The total transaction price was NT$688,901 thousand. This figure covers the acquisition of machinery equipment and related accessories over the stated period, indicating a sizable capital expenditure for manufacturing operations.

Who was the trading counterparty in ChipMOS (IMOS) machinery acquisition?

The trading counterparty was ADVANTEST TAIWAN INC.. The filing states there is no related-party relationship between ADVANTEST TAIWAN INC. and ChipMOS, meaning the deal was conducted on a non-related-party basis.

When was the ChipMOS (IMOS) equipment transaction approved and by whom?

The transaction was approved on 2026/04/02 by the President of the Company. This approval date and level are explicitly disclosed as the other approval date and approval level in the filing.

What is the stated purpose of ChipMOS (IMOS) acquiring this machinery equipment?

The acquisition is for manufacturing purpose. The company indicates the machinery and related accessories will be used in its production activities, supporting its core business operations and output capabilities.

How was the transaction price for ChipMOS (IMOS) equipment determined?

ChipMOS referred to market value and negotiated the price by mutual agreement. The filing notes the decision followed internal authorization procedures, indicating a negotiated process rather than a formal tender or auction.