ChipMOS repurchases 10.78M shares, totals NT$304.9M to date

Rhea-AI Filing Summary

ChipMOS TECHNOLOGIES INC. reported that its cumulative share repurchases reached NT$300 million, as disclosed in an English translation of its TWSE MOPS notice dated 2025/10/13.

The company has repurchased 10,782,000 common shares for a total of NT$304,901,359, at a current average price of NT$28.28. During the repurchase period, the company holds 19,887,000 of its own shares, which is 2.77% of issued shares.

Insights

Equity capital markets analyst

Buyback crosses NT$300M threshold; 2.77% of shares held as treasury.

ChipMOS reports cumulative repurchases totaling NT$304,901,359, acquiring 10,782,000 common shares at an average of NT$28.28. The company now holds 19,887,000 treasury shares, equal to 2.77% of issued shares.

This reflects a cash outflow for buybacks and indicates management’s use of capital for share repurchases. Actual effects on per‑share metrics depend on how these treasury shares are treated under local rules.

Key anchors are the disclosure date of 2025/10/13 and the stated thresholds. Subsequent filings may provide updated totals if the program continues.

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 October 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: October 14, 2025				By		/S/ S. J. Cheng
				Name:		S. J. Cheng
				Title:		Chairman & President

English translation of Company’s October 13, 2025 filing with the Taiwan Stock Exchange Corporation’s (“TWSE”)
Market Observation Post System (“MOPS”).

Date of announcement: 2025/10/13

Subject: Announcement of the Company’s cumulative value of shares repurchased amounts to NT$300 million

Date of events: 2025/10/13

To which item it meets: Article 4, Paragraph 1, Item 35 of the Taiwan Stock Exchange Corporation Procedures for Verification and Disclosure of Material Information of Companies with Listed Securities

Statement:

1.Date the cumulative number of shares currently repurchased accounted for 2 percent or more of the shares issued by the company, or amounted to NT$300 million or more: 2025/10/13

2.Number of shares currently repurchased (shares): 10,782,000

3.Type of shares currently repurchased: Common shares

4.Total monetary amount of shares currently repurchased (NTD): 304,901,359

5.Current average repurchase price per share (NTD): 28.28

6.Cumulative number of the company’s own shares held during the repurchase period (shares): 19,887,000

7.Cumulative number of the company’s own shares held during the repurchase period as a percentage of the total number of the company’s issued shares: 2.77%

8.Any other matters that need to be specified: None.

FAQ

What did ChipMOS (IMOS) announce in its latest 6-K?

It reported that cumulative share repurchases reached NT$300 million as of 2025/10/13, per an English translation of its TWSE MOPS notice.

How many ChipMOS (IMOS) shares have been repurchased to date?

10,782,000 common shares have been repurchased, totaling NT$304,901,359.

What is the average repurchase price for ChipMOS (IMOS)?

The current average repurchase price is NT$28.28 per share.

What percentage of ChipMOS (IMOS) issued shares does the treasury position represent?

Treasury shares held during the repurchase period total 19,887,000, which is 2.77% of issued shares.

What type of shares did ChipMOS (IMOS) repurchase?

The repurchases were of common shares.

Were there any additional notes in the ChipMOS (IMOS) disclosure?

The disclosure stated: Any other matters: None.