# EDGAR Filing Document

**Accession Number:** 0001123134
**File Stem:** 0001193125-25-303021
**Filing Date:** 2025-12
**Character Count:** 4709
**Document Hash:** 7d39c71c58f357e765117176a5526f59
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-303021.hdr.sgml**: 20251201

**ACCESSION NUMBER**: 0001193125-25-303021

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251201

**FILED AS OF DATE**: 20251201

**DATE AS OF CHANGE**: 20251201

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CHIPMOS TECHNOLOGIES INC
- **CENTRAL INDEX KEY:** 0001123134
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **STATE OF INCORPORATION:** F5
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37928
- **FILM NUMBER:** 251537031

**BUSINESS ADDRESS:**
- **STREET 1:** NO. 1, R & D ROAD 1
- **STREET 2:** HSINCHU SCIENCE PARK, HSINCHU
- **CITY:** TAIWAN
- **STATE:** F5
- **ZIP:** 00000
- **BUSINESS PHONE:** 866-3-5770055

**MAIL ADDRESS:**
- **STREET 1:** NO. 1, R & D ROAD 1
- **STREET 2:** HSINCHU SCIENCE PARK, HSINCHU
- **CITY:** TAIWAN
- **STATE:** F5
- **ZIP:** 00000

------

**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 December 2025**

**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: December 1, 2025 | By | /S/ S. J. Cheng |
|  | Name: | S. J. Cheng |
|  | Title: | Chairman & President |

---

------

Below is the English version of our December 1, 2025 filing on the Taiwan Stock Exchange Corporation's Market Observation Post System (MOPS).

**Date of announcement:** 2025/12/01

**Subject:** Announcement of the Company on the completion of registration of treasury stock cancellation.

**Date of events:** 2025/12/01

**To which item it meets:** Article 4, Paragraph 1, Item 36 of the Taiwan Stock Exchange Corporation Procedures for Verification and Disclosure of Material Information of Companies with Listed Securities

**Statement:**

1. Date of the competent authority's approval of capital reduction: 2025/11/06

2. Date of completion of capitalization change registration: 2025/12/01

3. Effect on the financial statements (including any discrepancy between the amount of paid-in capital and the number of shares outstanding, and the effect on net worth per share):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)Paid-in capital: NT$7,172,401,260 before capital reduction; NT$7,045,231,260 after capital reduction.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)Outstanding shares: 704,523,126 before capital reduction; 704,523,126 after capital reduction.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3)Net worth per share: NT$33.39 before capital reduction; NT$33.39 after capital reduction.

4. Plan for expected share replacement operations: Not applicable

5. Estimated number of listed common shares after capital reduction and new issue: Not applicable

6. Estimated number of listed common shares as a percentage of issued common shares after capital reduction and new issue (Number of common shares after capital reduction / Number of issued common shares): Not applicable

7. Countermeasures for poor circulation of equity if the aforesaid estimated number of listed common shares does not reach 60 million shares and the percentage does not reach 25% after capital reduction: Not applicable

8. Any other matters that need to be specified:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)The Company cancelled 12,717,000 shares of the 6<sup>th</sup> repurchase of treasury shares.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)The aforementioned disclosures have not considered the impact of the treasury shares repurchase and transfer to employees approved by the Board of Directors on May 13, 2025.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3)Net worth per share is based on the 2025 third quarter financial statements.

------