Q1 FY2026 Quarterly Report: Revenue KRW 263.8B, Semi Segment 84%

Quarterly Report Soulbrain Co., Ltd. (7th Fiscal Year, 1st Quarter) Fiscal Period: January 1, 2026 to March 31, 2026 Filed with: Financial Services Commission, Korea Exchange Date of Submission: May 15, 2026 Filing Entity Type: Listed Stock Company Exemption Reason: None Company Name: Soulbrain Co., Ltd. CEO: Park Young-soo Head Office: F-Dong, 52 Geumto-ro, Sujeong-gu, Seongnam-si, Gyeonggi-do (Geumto-dong, Soulbrain) Phone: 031-719-0700 Homepage: http://www.soulbrain.co.kr Responsible Preparer: Kim Dae-sik, Head of Management Division I. Company Overview 1-5. Per disclosure form standards, company overview, history, capital changes, total shares, and articles of incorporation are not included in the quarterly report. Refer to the annual report filed on March 16, 2026. II. Business Content 1. Business Overview The Company produces chemical materials for semiconductor processes, chemical materials for display processes, and secondary battery materials, supplying products to major domestic semiconductor, display, and secondary battery manufacturers. Customers are global leaders in semiconductor chip production, display panel production, and secondary battery production. The downstream industries are influenced by global economic conditions, and the Company's business environment is therefore affected by these downstream industry fluctuations. The Company's Q1 2026 consolidated revenue was KRW 263,805 million. By business segment: Semiconductor (KRW 221,913 million, 84% of total revenue), Display (KRW 13,536 million, 5%), Secondary Battery (KRW 18,069 million, 7%). The Company stably supplies process chemical materials to domestic manufacturers including Samsung Electronics, SK hynix, Samsung Display, and LG Display. Related products are also supplied to domestic secondary battery manufacturers including Samsung SDI, SK On, and LG Energy Solution. The target market is the raw materials market used by semiconductor, display, and secondary battery manufacturers. With rapid technological development and process changes at customers, intense competition has unfolded to preempt new materials. The Company has secured quality assurance from customers through early localization and accumulated technology, and continues to develop and supply new products based on trust. For overseas market expansion, the Company established Soulbrain (Xi'an) Electronic Materials Co., Ltd. in China in December 2012 for semiconductor process material production and sales, and established Soulbrain RASA Co., Ltd. in January 2016 for high-purity phosphoric acid production and sales. For new market entry, Soulbrain TX LLC was established in the U.S. in January 2022, and Soulbrain RASA TX LLC in January 2024. The Company's customers possess world-class DRAM and NAND technology and productivity, and are also pursuing aggressive strategies in non-memory semiconductors with ongoing domestic and overseas production line expansions and investments. The above entities are working to enable immediate local response and mass-production application of new materials. 2. Major Products and Services A. Status of Major Products (Jan 1, 2026 ~ Mar 31, 2026; KRW million / %) - Semiconductor: HF, B.O.E, CMP Slurry, Precursor, Lining, etc. — chemical materials and equipment for semiconductor manufacturing processes. Revenue: KRW 221,913 million (84%) - Display: Etchant, organic materials, etc. — chemical materials for display manufacturing processes, mobile-related products. Revenue: KRW 13,536 million (5%) - Secondary Battery: Secondary battery electrolytes, etc. — chemical materials for secondary battery manufacturing processes. Revenue: KRW 18,069 million (7%) - Other: Semiconductor equipment maintenance, etc. Revenue: KRW 10,287 million (4%) - Total: KRW 263,805 million (100%) (Based on consolidated comprehensive income statement) B. Major Product Price Trends - Semiconductor materials: Selling prices rose ~3% vs. prior year (6th term) and ~10% vs. two years prior (5th term). - Display materials: Selling prices fell ~9% vs. prior year and ~11% vs. two years prior. - Secondary battery materials: Selling prices fell ~3% vs. prior year and ~5% vs. two years prior. 3. Raw Materials and Production Facilities 3-1. Major Raw Materials A. Status (KRW million / %) - Semiconductor: H3PO4, etc. — Purchase amount KRW 85,512 million (74.1%); main supplier Soulbrain RASA, etc. - Display: Organic materials, etc. — KRW 11,905 million (10.3%); main supplier MC Solution, etc. - Secondary Battery: Electrolyte raw materials, etc. — KRW 14,774 million (12.8%); main supplier DFD, etc. B. Raw Material Price Trends - Semiconductor raw material prices: Rose ~9% vs. prior year and ~17% vs. two years prior. - Display raw material prices: Rose ~14% vs. prior year and ~61% vs. two years prior. - Secondary battery raw material prices: Rose ~49% vs. prior year, fell ~4% vs. two years prior. 3-2. Production Facilities A. Production Capacity - Semiconductor (HF, etc., Gongju, tons): Q1/7th term 45,648; 6th term 146,232; 5th term 133,248 - Display (Chemical, Gongju/Paju, tons): Q1/7th term 20,250; 6th term 82,125; 5th term 82,125 - Secondary Battery (materials, Gongju, tons): Q1/7th term 9,000; 6th term 36,000; 5th term 15,975 Capacity basis: Daily maximum production capacity per plant (24-hour basis) × operable days in the period. B. Production Performance and Utilization Production output: - Semiconductor (HF, etc., tons): Q1/7th term 24,111; 6th term 87,140; 5th term 86,465 - Display (Chemical, tons): Q1/7th term 5,271; 6th term 22,369; 5th term 23,399 - Secondary Battery (tons): Q1/7th term 1,632; 6th term 5,233; 5th term 7,438 Utilization rate (current fiscal year): - Semiconductor (HF, etc.): Capacity 45,648 / Output 24,111 / Utilization 53% - Display: [Translation truncated]