Q1 2026 Quarterly Report (40th Fiscal Year) — Simmtech

Summary

Simmtech Holdings filed its Q1 2026 quarterly report covering January 1 to March 31, 2026, marking the 40th fiscal year. As a pure holding company, it derives income from dividends, trademark royalties, and rental income from subsidiaries engaged primarily in PCB (Module and Substrate) manufacturing and sales. The consolidation scope remained unchanged at 17 subsidiaries (1 listed, 16 unlisted), with no new additions or removals during the period. The report reaffirms the corporate structure across Korea, China, Japan, Singapore, Malaysia, Taiwan, India, and other overseas entities without disclosing material new business developments in the opening sections. No credit rating changes or special listing matters were reported.

Historical Impact

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

Median +5d

-3.37%

Range

-4.66% to -2.08%

Positive outcomes

0/2

Filed	P₀	P₊₅	+5d
Nov 13, 2025	₩3,435	₩3,275	-4.66%
May 14, 2025	₩1,489	₩1,458	-2.08%

Full Translation

Quarterly Report 6.5 Simmtech Holdings Co., Ltd. 1 Y 150111-0006185 Quarterly Report (40th Fiscal Year) Fiscal Year: From January 1, 2026 to March 31, 2026 To: Financial Services Commission, Korea Exchange Date: May 14, 2026 Filing Entity Type: Listed Stock Corporation Exemption Reason: Not Applicable Company Name: Simmtech Holdings Co., Ltd. CEO: Park Kwang-jun Head Office: 73 Sandan-ro, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do Phone: 043-909-8000 Website: http://www.simmtechholdings.co.kr Responsible Author: CFO Shin Seung-il, Phone: 043-269-9057 [Confirmation by CEO, etc.] CEO Confirmation Letter (image) I. Company Overview 1. Company Overview A. Status of Consolidated Subsidiaries (Summary) (Unit: companies) - Listed: Beginning 1, Increase -, Decrease -, Ending 1, Major Subsidiaries 1 - Unlisted: Beginning 16, Increase -, Decrease -, Ending 16, Major Subsidiaries 5 - Total: Beginning 17, Increase -, Decrease -, Ending 17, Major Subsidiaries 6 * For details, see 'Detail Table-1. Status of Consolidated Subsidiaries (Detail).' The above consolidated company count excludes 4 companies (including Simmtech Holdings) that are not consolidated, out of 21 total affiliates within the corporate group. A-1. Changes in Consolidated Companies - New Consolidation: None - Excluded from Consolidation: None B. Legal and Commercial Names - Korean: 주식회사 심텍홀딩스 - English: SIMMTECH HOLDINGS Co., Ltd. C. Date of Establishment and Duration - Established: August 24, 1987 - Duration: August 24, 1987 ~ Present D. Address, Phone, and Website of Head Office - Address: 73 Sandan-ro, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do (Songjeong-dong) - Phone: 043-909-8000 - Website: http://www.simmtechholdings.co.kr E. SME Status - As of the report base date, the Company does not qualify as a small or medium-sized enterprise under the Framework Act on SMEs. - SME: Not Applicable - Venture Company: Not Applicable - Mid-sized Enterprise: Applicable F. Main Business The Company is a pure holding company whose principal business is to control the business activities of other companies through stock ownership, with no separate operating business. The Company's revenue sources include dividend income from subsidiaries, trademark royalty income, and rental income. The main business activities conducted by the Company and its major subsidiaries can be divided into four categories. The affiliated companies, including major subsidiaries engaged in each business, are as follows: PCB Business Division: - PCB Sales/Manufacturing/Sales, etc.: Simmtech Co., Ltd., Xintai Electronics (Xi'an) Co., Ltd., Simmtech Graphics Co., Ltd., SUSTIO SDN. BHD. — Module PCB and Substrate PCB, etc. - Overseas PCB Sales, etc.: Simmtech Japan Inc., Simmtech Niching (Suzhou) Co., Ltd., Simmtech America Inc., Simmtech SE Asia PTE. Ltd., Simmtech Taiwan Co., Ltd., SIMMTECH INDIA PRIVATE LIMITED — Overseas marketing and market research, etc. - PCB Product Inspection, etc.: T.E. TECH(M) SDN.BHD., AI Tech Co., Ltd., Bestics Co., Ltd. — PCB product inspection and logistics services, etc. Holding Company Business Division: - Investment Business: Simmtech Holdings Co., Ltd., SIMMTECH INTERNATIONAL PTE. LTD., SIMMTECH ASIA OPERATION PTE. LTD., Simmtech Hong Kong Holdings Limited, STNC Hong Kong Holdings Limited, STJ Holdings Co., Ltd., Global Simmtech Co., Ltd., LIGHTMAC Pte. Ltd. — Holding (overseas) affiliate shares and management consulting, etc. Note) For other details, please refer to 'II. Business Content.' G. Credit Rating: Not Applicable H. Stock Listing (or Registration/Designation) and Special Listing - Listing Status: KOSDAQ Market Listing - Listing Date: January 4, 2000 - Special Listing Type: Not Applicable 2. Company History Key milestones (2010–2023): - 2010.11: Won '$400 Million Export Tower' at the 47th Trade Day - 2011.05: Selected as '2011 KOSDAQ Hidden Champion' by Korea Exchange - 2011.11: Won '$500 Million Export Tower' at the 48th Trade Day - 2013.02: Selected as '2013 Strong SME' by Samsung Electronics - 2013.02: Won 'Outstanding Disclosure Corporation' award from Korea Exchange - 2013.06: Won 'Best Job Creation Company Award' at the 6th Korea KOSDAQ Awards - 2013.07: Received 'Outstanding Site Award in Service and Supplier for 2012' from STATSchiPPAC - 2014.01: Received 'Best Partnership' from TOSHIBA - 2014.02: Received 'Best in Class' Supplier award from SanDisk for 4 consecutive years - 2014.10: Received 'Outstanding Partner Award' at SK Hynix 2014 Win-Win Growth Day - 2015.01: Received 'Best Partner Award' from Samsung Electronics for 2 consecutive years - 2015.02: Decision on company split - 2015.07: Name change (Simmtech Co., Ltd. → Simmtech Holdings Co., Ltd.); Spin-off (base date: 2015.07.01) - 2015.08: Simmtech Holdings KOSDAQ relisting (trading commenced August 7, 2015) - 2015.09: Participated in Simmtech's third-party allocation rights offering (Simmtech Hong Kong Holdings Limited contributed in kind) - 2015.11: General public offering rights offering (acquired Simmtech's existing shares) - 2016.01: Converted to holding company (conversion date: 2016.01.01) - 2016.05: Established STJ Holdings Co., Ltd. (grandchild company, Japan) - 2017.11: Issued registered convertible preferred shares via third-party allocation rights offering - 2017.11: Participated in Simmtech's third-party allocation registered redeemable preferred shares rights offering - 2017.12: Simmtech acquired additional STJ Holdings shares (acquired external institutional investors' stake) — STJ Holdings and Eastern Co. became Simmtech subsidiaries - 2018.02: Simmtech established Simmtech Global Co., Ltd. (grandchild company, domestic foreign holding company) - 2018.10: Simmtech completed in-kind contribution to Simmtech Global - 2019.05: Completed treasury stock acquisition (2,000,000 shares, approx. KRW 4.3 billion) - 2019.05: Acquired 760,030 shares of Simmtech (approx. KRW 5.2 billion) to strengthen holding company control - 2019.10: Simmtech received 'Outstanding Partner Award' at SK Hynix 2019 Win-Win Growth Day - 2019.11: Singapore subsidiary Simmtech SE Asia PTE. Ltd. established SUSTIO SDN. BHD. - 2019.11: Japanese affiliate STJ Holdings Co., Ltd. established Nippon Via Co., Ltd. - 2020.01: Japanese affiliate Eastern Co., Ltd. renamed (Eastern Co., Ltd. → Simmtech Graphics Co., Ltd.) - 2020.02: Simmtech Global Co., Ltd. renamed (Simmtech Global → Global Simmtech) - 2020.05: Participated in Simmtech's shareholder allocation followed by general public offering of forfeited shares rights offering - 2020.05: Participated in Simmtech's T.E TECH(M) SDN, BHD rights offering (acquired 50.44% stake) - 2020.09: Participated in Simmtech's 2nd third-party allocation unlisted redeemable preferred shares - 2021.01: Small-scale no-additional-capital merger by absorption (subsidiaries Senior Partners Co. and Seongjinsa Co.) - 2021.04: Established Simmtech International Pte. Ltd. (Singapore, intermediate holding company) - 2021.06: Established Simmtech Taiwan Co., Ltd. (Taiwan, trading business) - 2021.08: 8th registered convertible preferred shares third-party allocation rights offering - 2021.09: 9th registered convertible preferred shares third-party allocation rights offering - 2022.01 (or 2021.02): Simmtech established AI Tech Co., Ltd. (PCB inspection) - 2022.03: Japanese affiliate Sim... [Translation truncated]