A disclosure filed on October 21, 2026 reports that the shares held by the largest shareholder group of Isu Specialty Chemical fell by 12,548 shares following the exercise of exchangeable bonds.

The company said that in the ownership change report submitted on October 21, 2026, the shares held by the largest shareholder group stood at 10,320,779 shares (34.15%) as of this reporting date, a decrease of 12,548 shares from the previous report. The filing records the change as resulting from the exercise of exchangeable bonds on October 19, 2026. The disclosure reports a change in shareholding, and the original filing contains no separate outlook or future plans.

1. 01

   The change date is October 19, 2026, and the reason for the change is recorded as "exchange (-)" with the remark "exercise of exchangeable bonds." The company said these details are recorded in the filing.

2. 02

   The largest shareholder, Isu Co., Ltd., reduced its holding from 7,189,232 shares to 7,176,684 shares, a decrease of 12,548 shares.

3. 03

   The company reported that the largest shareholder group's ownership ratio changed from 34.19% to 34.15% compared with the date of the previous report, April 27, 2026.

An AI model translated the Korean summary of this filing into English; every number is carried over from the Korean original. Reference information, not investment advice.

Key figures

Total shares held by the largest shareholder group as of this report's submission date

10,320,779 shares (34.15%)

Total shares held as of the previous report's submission date

10,333,327 shares (34.19%)

Change in shares and ratio

-12,548 shares (-0.04%)

Isu Co., Ltd. shares after the change, as of the change date

7,176,684 shares (23.75%)

Total issued common shares

30,218,872 shares

Filing facts

Filing type

Largest Shareholder Holding Change

Report name

Report on Changes in Shares Held by the Largest Shareholder and Related Parties

Filed

Oct 21, 2026

Receipt number

20261021800577