Largest Shareholder Cuts Stake to 25.03% from 28.55%

Report on Mass Holdings of Stocks, Etc. (General) Version 6.0 DB HiTek Co., Ltd. Filing date: May 19, 2026 Report on Mass Holdings of Stocks, Etc. (General form: filing under Article 147 of the Financial Investment Services and Capital Markets Act, for 'purposes of influencing management control') To: Financial Services Commission Date of reporting obligation: May 19, 2026 To: Korea Exchange Report preparation reference date: May 19, 2026 Filer: DB Inc. [Summary Information] Issuing company: DB HiTek Co., Ltd. Relationship with issuer: Largest shareholder Report classification: Change Number and ratio of shares held: - Previous report: 12,450,689 shares / 28.55% - This report: 10,918,429 shares / 25.03% Number and ratio of shares subject to major contracts: - Previous report: 9,396,010 shares / 21.54% - This report: 9,396,010 shares / 21.54% Number and ratio of voting rights: - Previous report: - - This report: - Number and ratio of voting rights subject to major contracts: - Previous report: - - This report: - Reason for report: Change in number of special-related parties and shares held. The filer hereby confirms that, as of the report preparation reference date, the holdings of the filer and its special-related parties have been accurately stated in accordance with relevant laws and reporting cautions, and that there are no false statements or omissions of material matters. Part 1: Overview of the Report 1. Matters concerning the issuer - Company name: DB HiTek Co., Ltd. - Company code: 000990 - Corporate classification: KOSPI-listed corporation - Total issued shares with voting rights: 43,617,167 - (Includes common shares, Preferred 1, and Preferred 2 (unlisted)) 2. Matters concerning the mass holder A. Filer (1) Filer overview - Report classification: Change - Joint filing: Yes - Filer classification: Domestic corporation - Nationality: Republic of Korea - Name: DB Inc. (주식회사 디비아이엔씨) - Address: Samseong-dong, Gangnam-gu, Seoul - Business registration number: 211-81-19938 - Business: IT, trading, etc. - Relationship with issuer: Largest shareholder - Contact: Finance Team, DB Inc., Jin Hyun-jun, 02-301-**** (2) Detailed information on the filer - Legal form: Stock corporation - Total assets: 989,492 (million KRW) - Total liabilities: 539,249 - Total equity: 450,243 - Capital stock: 100,587 - Representatives: Moon Duk-sik, Kang Un-sik (each representative) - Decision-making body: Board of Directors - Largest shareholder: Kim Nam-ho - Largest shareholder's ownership ratio: 16.83% * Based on consolidated financial statements as of end of 2025. B. Special-related parties (1) Overview of special-related parties: 1. Kim Jun-ki – Individual (domestic), major shareholder, DOB 1944-12-04, founder/chairman of DB Group 2. Kim Joo-won – Individual (domestic), major shareholder, DOB 1973-02-05, vice chairman of DB Group 3. DB Kim Jun-ki Cultural Foundation – Domestic corporation, public foundation 4. Ha Joo-chan – Individual, affiliated company executive, CEO of Dongbu Cheolgu 5. Yang Seung-joo – Individual, executive, inside director of DB HiTek 6. Lee Sang-ki – Individual, executive, inside director of DB HiTek 7. Kim Dong-gyun – Individual, affiliated executive, non-executive director of DB Technology 8. Choi Jong-gwan – Individual, affiliated executive, auditor of Dongbu Cheolgu 9. Samdong Heungsan Co., Ltd. – Domestic corporation, IT maintenance service, etc. 10. Biltech Co., Ltd. – Domestic corporation, real estate management, etc. 11. Shin Hae-cheol – Individual, CEO of Samdong Heungsan 12. Kim Jae-young – Individual, CEO of Topserve 13. DB HiTek In-House Workers Welfare Fund – Other domestic entity, affiliated * Samdong Heungsan, Biltech, Shin Hae-cheol, and Kim Jae-young became subject to reporting obligations following a January 9, 2026 notice from the Korea Fair Trade Commission designating them as deemed members of the 'DB' business group. However, by a court decision dated May 19, 2026, the effect of such designation and notice was suspended, and they have been removed from the list of special-related parties. (2) Detailed information on special-related parties (legal entities): - DB Life Insurance Co., Ltd. Legal form: Stock corporation Total assets: 12,156,782 (million KRW) Total liabilities: 10,963,437 Total equity: 1,193,345 Capital stock: 253,334 Representative: Kim Young-man Largest shareholder: DB Insurance Co., Ltd. (82.92%) - DB Kim Jun-ki Cultural Foundation Legal form: Non-profit public foundation Total assets: 562,961 Total liabilities: 46,416 Total equity: 516,546 Endowment: 50,120 Representative (Chairman): Yoon Dae-geun - Samdong Heungsan Co., Ltd. Legal form: Stock corporation Total assets: 272,303 Total liabilities: 93,040 Total equity: 179,263 Capital stock: 1,100 Representatives: Shin Hae-cheol, Kim Jin-seop Largest shareholder: Donggok Social Welfare Foundation (18.18%) - Biltech Co., Ltd. Legal form: Stock corporation Total assets: 74,809 Total liabilities: 25,789 Total equity: 49,019 Capital stock: 500 Representatives: Shin Hae-cheol, Chung Eui-sun Largest shareholder: Samdong Heungsan (57.9%) - DB HiTek In-House Workers Welfare Fund Legal form: In-house workers welfare fund Total assets: 13,829 Total liabilities: 1,280 Total equity: 12,548 Capital: 12,548 Representatives: Ha Joo-chan, Hong Seok-hyun Decision-making body: Welfare Fund Council C. Collective investment business operators: Not applicable. [Translation truncated]