Q1 2026 Quarterly Report — KCTech

Summary

KCTech filed its Q1 2026 quarterly report (10th fiscal year) covering January 1 to March 31, 2026, with no material changes to its corporate structure, controlling shareholder, or principal business. The company continues to operate one consolidated subsidiary (KCTech America Inc., established April 2025) supporting U.S. customer R&D for slurry and chemical products. Credit ratings remain stable at AA- from NICE D&B and A+ from Korea Ratings Data and EcredibleI, consistent with prior-year levels. The March 2026 AGM reappointed CEO Choi Dong-gyu, two inside directors, and three outside directors, with no new appointments. Capital stock and total shares outstanding (20,690,323 common shares) are unchanged from year-end 2025.

Historical Impact

2 past Quarterly Report · ≈ 10-Q events at KCTech

Median +5d

-4.96%

Range

-7.63% to -2.30%

Positive outcomes

0/2

Filed	P₀	P₊₅	+5d
Nov 13, 2025	₩43,550	₩42,550	-2.30%
May 14, 2025	₩28,850	₩26,650	-7.63%

Full Translation

QUARTERLY REPORT (10th fiscal year) Fiscal year: January 1, 2026 to March 31, 2026 Submitted to: Financial Services Commission and Korea Exchange Date of submission: May 13, 2026 Filing entity type: Listed corporation Exemption reason: None Company name: KCTech Co., Ltd. CEOs: Yang Ho-geun, Choi Dong-gyu Head office: 12, Je2gongdan 3-gil, Miyang-myeon, Anseong-si, Gyeonggi-do Phone: 031-670-8000 Website: http://www.kctech.com Responsible preparer: Controller, Shin Seung-sik (031-670-8000) TABLE OF CONTENTS [Confirmation by Representative Director, etc.] I. COMPANY OVERVIEW 1. Company Overview a. Status of Consolidated Subsidiaries (Summary) (Unit: companies) - Listed: Beginning - / Increase - / Decrease - / Ending - / Major subsidiaries - - Unlisted: Beginning 1 / Increase - / Decrease - / Ending 1 / Major subsidiaries - - Total: Beginning 1 / Ending 1 (See 'Detail Table-1' for full status.) b. Changes in Consolidated Companies: None (no new consolidations, no exclusions). c. Legal and Commercial Name The company's name is '주식회사 케이씨텍' in Korean and 'KCTECH CO., LTD.' in English. The abbreviated form is '㈜케이씨텍'. d. Date of Establishment and Duration The company was established on November 1, 2017 through a spin-off (personal division) from KC Co., Ltd. (formerly KCTech Co., Ltd.), inheriting the semiconductor equipment, materials, and display equipment business divisions. It was relisted on the KOSPI market of the Korea Exchange on December 5, 2017. e. Head Office Address, Phone, and Website - Address: 12, Je2gongdan 3-gil, Miyang-myeon, Anseong-si, Gyeonggi-do - Phone: 031-670-8000 - Website: http://www.kctech.com f. SME Status: - SME: Not applicable - Venture company: Not applicable - Mid-sized enterprise: Applicable g. Principal Business and New Business The company's main business is the manufacturing and sale of front-end process equipment and consumable materials used in semiconductor and display processes. Its product lineup includes semiconductor CMP/cleaning equipment, display Wet-station/Coater equipment, semiconductor slurry, and display materials. KCTech America Inc. conducts R&D for slurry and chemical products to strengthen technical support for U.S. customers. For further details, see 'II. Business Contents' in this report. h. Credit Rating Information Selected ratings (CCR = Corporate Credit Rating): - 2026.04.16: AA- from NICE D&B (scale AAA~D) - 2026.04.13: A+ from Korea Ratings Data - 2026.04.14: A+ from EcredibleI - 2025.08.29: AA- (NICE D&B); 2025.09.16: A+ (Korea Ratings Data); 2025.08.26: A+ (EcredibleI) - 2025.04.03: AA- (NICE D&B); 2025.04.03: A+ (Korea Ratings Data); 2025.04.10: A+ (EcredibleI) - Earlier years: ratings ranged AA-/A+/A from 2022 through 2024 across the three agencies. Credit rating definitions (Korea Ratings Data scale): - AAA: Highest commercial credit capability - AA: Very excellent, slightly inferior to AAA - A: Excellent, but more susceptible to cyclical/environmental change than higher grades - BBB: Good, but potential for deterioration under future downturn - BB: Acceptable, with some instability under changing market conditions - B: No immediate problem, but unstable under future changes - CCC: Contains commercial credit risk potential - CC: High possibility of credit risk - C: Very high possibility of credit risk - D: Currently in default state Ratings are divided into 10 grades from AAA to D, with +/- modifiers for grades AA through CCC. i. Listing Status - KOSPI listing: December 5, 2017 - Special listing type: Not applicable 2. Company History a. Head Office Location and Changes 1) November 2017: 30, Je2gongdan 3-gil, Miyang-myeon, Anseong-si, Gyeonggi-do (newly established on November 1, 2017 via spin-off from KC Co., Ltd.). 2) November 2022: relocated to 12, Je2gongdan 3-gil, Miyang-myeon, Anseong-si, Gyeonggi-do. b. Material Changes in Management and Auditors - 2021.03.24: CEO Choi Dong-gyu and CEO Lim Gwan-taek (reappointed). - 2021.08.11: CEO Yang Ho-geun newly appointed; CEO Lim Gwan-taek's term ended. - 2022.03.29 (AGM): Inside directors Min Seong-guk and Kwon Won-taek newly appointed; CEO Yang Ho-geun reappointed. - 2023.03.29 (AGM): Outside directors Kim Hyun-jae, Kim Seok, and Kim Jun-rae newly appointed; CEO Choi Dong-gyu and inside directors Ko Seok-tae and Ko Sang-geol reappointed; Auditor Kwon Bong-su and outside directors Lim Seung-soon and Kim Do-hee retired or terms ended. - 2024.03.28 (AGM): CEO Yang Ho-geun and inside directors Kwon Won-taek and Min Seong-guk reappointed. - 2026.03.24 (AGM): CEO Choi Dong-gyu, inside directors Ko Seok-tae and Ko Sang-geol, and outside directors Kim Jun-rae, Kim Hyun-jae, and Kim Seok reappointed. c. Changes in Largest Shareholder: None as of the reporting date. d. Changes in Corporate Name: None since incorporation on November 1, 2017. e. Mergers, etc.: None. f. Changes in Industry or Principal Business: None. g. Other Material Matters Related to Management: None. h. Subsidiary History - April 2025: Subsidiary KCTech America Inc. established. 3. Changes in Capital Stock (Unit: KRW, shares) - Common stock issued (10th term / current quarter-end): 20,690,323 shares - Common stock issued (9th term / 2025 year-end): 20,690,323 shares - Common stock issued (8th term / 2024 year-end): 20,861,556 shares - Par value: KRW 500 - Capital stock: KRW 10,430,778,000 (all three periods) [Translation truncated]