Q1 2026 Quarterly Report: Capital Structure, Treasury Shares, and Articles of Incorporation Amendments — DUKSAN Tehera

Summary

DUKSAN Tehera filed its Q1 2026 quarterly report (21st fiscal year) covering January-March 2026, with no changes to paid-in capital (KRW 10.24 billion, 20,476,584 common shares outstanding) and treasury shares unchanged at 49,775 shares (0.2% of issued shares). The company disclosed historical treasury share trust contracts, all of which were fully executed at near-100% completion and have since been terminated, with no current plan to dispose of or utilize existing treasury holdings. Material amendments to the Articles of Incorporation were approved at the 20th annual general meeting on March 31, 2026, including: (i) restricting shareholder meetings to in-person attendance only (per amended Commercial Act Article 364), (ii) allowing voting proxies to be submitted via electronic document (per amended Commercial Act Article 368(2)), and (iii) replacing the prior outside director requirement (1/4 of total directors) with a new independent director threshold of at least 1/3 of total directors. These changes are largely procedural compliance updates and do not signal a material change in operations or capital allocation strategy.

Historical Impact

2 past Quarterly Report · ≈ 10-Q events at DUKSAN Tehera

Median +5d

-10.30%

Range

-12.51% to -8.10%

Positive outcomes

0/2

Filed	P₀	P₊₅	+5d
Nov 14, 2025	₩19,260	₩17,700	-8.10%
May 15, 2025	₩19,990	₩17,490	-12.51%

Full Translation

QUARTERLY REPORT 6.5 DUKSAN Tehera Co., Ltd. 1 Y 230111-0120607 QUARTERLY REPORT (21st Fiscal Year) Fiscal Period: From January 1, 2026 to March 31, 2026 To: Financial Services Commission / Korea Exchange Date of Submission: May 8, 2026 Filer Type: Listed Corporation Exemption Grounds: None Company Name: DUKSAN Tehera Co., Ltd. Representative Director: Kim Byung-ki Head Office: 39 Pungse Sandan 2-ro, Pungse-myeon, Dongnam-gu, Cheonan-si, Chungcheongnam-do Phone: 041-903-9700 Website: http://www.dstp.co.kr Responsible Preparer: Kim Chun-ho, Managing Director Phone: 041-903-9700 TABLE OF CONTENTS [Confirmation by Representative Director and Others] File: Confirmation by Representative Director_260508.jpg I. COMPANY OVERVIEW 1. Company Overview - In accordance with the Corporate Disclosure Form Preparation Standards, this item is not included in the quarterly report. (Refer to the annual report filed on March 31, 2026.) 2. Company History - In accordance with the Corporate Disclosure Form Preparation Standards, this item is not included in the quarterly report. (Refer to the annual report filed on March 23, 2026.) 3. Changes in Paid-in Capital a. Capital Change Trend (Unit: KRW, shares) Common Stock: - 21st Term (end-March 2026): Total issued shares 20,476,584; Par value 500; Capital KRW 10,238,292,000 - 20th Term (end-2025): Total issued shares 20,476,584; Par value 500; Capital KRW 10,238,292,000 - 19th Term (end-2024): Total issued shares 20,476,584; Par value 500; Capital KRW 10,238,292,000 Preferred Stock: None across all periods. Other: None across all periods. Total Capital: KRW 10,238,292,000 (unchanged across all three periods). 4. Total Number of Shares a. Status of Total Shares (As of March 31, 2026) (Unit: shares, %) | Category | Voting Shares | Non-voting Shares | Total | | I. Total authorized shares | 50,000,000 | - | 50,000,000 | | II. Total shares issued to date | 20,476,584 | - | 20,476,584 | | III. Total shares reduced to date | - | - | - | | 1. Capital reduction | - | - | - | | 2. Profit retirement | - | - | - | | 3. Redemption of redeemable shares | - | - | - | | 4. Other | - | - | - | | IV. Total outstanding issued shares (II-III) | 20,476,584 | - | 20,476,584 | | V. Treasury shares | 49,775 | - | 49,775 | | VI. Free float (IV-V) | 20,426,809 | - | 20,426,809 | | VII. Treasury share holding ratio | 0.2% | - | 0.2% | b. Status of Acquisition and Disposal of Treasury Shares (As of March 31, 2026) (Unit: shares) Under "Acquisition within distributable profit range" — Direct acquisition, on-market direct acquisition, off-market direct acquisition, and public tender offer: All zero for both common and preferred shares. Under "Acquisition by trust contract" — Trustee-held quantity: zero. Physically held quantity (common stock): opening balance 49,775; no changes; closing balance 49,775. Preferred: none. Subtotal (b) Common stock: 49,775 shares (opening and closing, no changes). Other acquisitions (c): None. Grand total (a+b+c) common stock: 49,775 shares (opening and closing). d. Status of Treasury Share Trust Contract Execution and Termination (As of March 31, 2026) (Unit: KRW, %, count) | Category | Contract Period | Contract Amount (A) | Acquisition Amount (B) | Execution Rate (B/A) | Direction Changes | Result Reporting Date | | Trust termination | 2020-07-08 to 2021-01-07 | 1,000,000,000 | 999,986,400 | 100% | 0 | 2021-01-08 | | Trust contract | 2021-01-28 to 2021-07-27 | 1,000,000,000 | 999,990,200 | 100% | 0 | 2021-07-28 | | Trust termination | 2021-01-28 to 2021-07-27 | 1,000,000,000 | 999,990,200 | 100% | 0 | 2021-07-28 | | Trust contract | 2021-10-25 to 2022-04-25 | 1,000,000,000 | 999,990,900 | 100% | 0 | 2022-04-26 | | Trust termination | 2021-10-25 to 2022-04-25 | 1,000,000,000 | 999,990,900 | 100% | 0 | 2022-04-26 | | Trust contract | 2021-12-07 to 2022-06-07 | 1,000,000,000 | 999,988,500 | 100% | 0 | 2022-06-08 | | Trust termination | 2021-12-07 to 2022-06-07 | 1,000,000,000 | 999,988,500 | 100% | 0 | 2022-06-08 | | Trust contract | 2022-01-12 to 2022-07-12 | 1,000,000,000 | 999,975,050 | 100% | 0 | 2022-07-12 | | Trust termination | 2022-01-12 to 2022-07-12 | 1,000,000,000 | 999,975,050 | 100% | 0 | 2022-07-12 | | Trust contract | 2025-03-31 to 2025-09-30 | 1,000,000,000 | 999,993,050 | 100% | 0 | 2025-07-01 | | Trust termination | 2025-03-31 to 2025-09-30 | 1,000,000,000 | 999,993,050 | 100% | 0 | 2025-10-01 | *The Company holds treasury shares for share price stabilization and enhancement of shareholder value. There is currently no specific plan for disposal or utilization. e. Issuance Status of Various Classes of Stock - Not applicable. 5. Articles of Incorporation a. History of Articles of Incorporation The most recent amendment to the Company's Articles of Incorporation was on March 31, 2026 [20th Annual General Meeting, Agenda Item No. 2: Partial Amendment of Articles of Incorporation]. Article 23 (Place of Meeting) — Before: Shareholder meetings shall be held at the location of the head office, and may be held in adjacent areas if necessary. Article 23 (Place and Method of Meeting) — After: (1) The Company's shareholder meetings shall be held at the location of the head office or branch offices, and may be held in adjacent areas if necessary. (2) The Company shall hold the general meeting solely in the form of shareholders attending the meeting venue in person on the day of the meeting. Purpose: Addition of Paragraph (2) pursuant to the amendment of Article 364 of the Commercial Act. Article 29 (Exercise of Voting Rights by Proxy) — Before: (1) Shareholders may have their voting rights exercised by a proxy. (2) The proxy under Paragraph (1) shall submit a written document (power of attorney) proving such proxy authority before the commencement of the shareholders' meeting. Article 29-2 (Exercise of Voting Rights in Writing) — Before: (1) Shareholders may exercise their voting rights in writing without attending the meeting. (2) Shareholders who wish to exercise voting rights in writing shall submit a written document containing the necessary matters concerning the exercise of voting rights to the Company no later than the day before the meeting. (3) Shareholders may have their voting rights exercised by a proxy, and in such case, the proxy shall submit a written document (power of attorney) proving such proxy authority before the commencement of the shareholders' meeting. Article 29 (Exercise of Voting Rights) — After (consolidated): (1) Shareholders may exercise their voting rights in writing without attending the meeting. (2) Shareholders who wish to exercise voting rights in writing shall submit a written document containing the necessary matters concerning the exercise of voting rights to the Company no later than the day before the meeting. (3) Shareholders may have their voting rights exercised by a proxy, and in such case, the proxy shall submit a written document OR ELECTRONIC DOCUMENT proving such proxy authority before the commencement of the shareholders' meeting. Purpose: Amendment pursuant to the revision of Article 368, Paragraph (2) of the Commercial Act. Article 32 (Number of Directors) — Before: The Company shall have not less than 3 and not more than 10 directors, with outside directors comprising not less than one-fourth of the total number of directors. Article 32 (Number of Directors) — After: The Company shall have not less than 3 and not more than 10 directors, with INDEPENDENT DIRECTORS comprising not less than ONE-THIRD of the total number of directors... [Translation truncated]