357780
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Source: dsi_quarterly · analyst_consensus (internal DB). DSI from quarterly filings; consensus as of collection.
Suppliers
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Soulbrain
Customers
Competitors
Notes
Soulbrain is the dominant domestic supplier of high-purity hydrogen fluoride (HF) etchant to Samsung and SK Hynix, a position strengthened after Japan's 2019 export controls accelerated Korean localization of specialty chemicals. It also supplies CMP slurries and precursors and produces thin glass for displays, giving it leveraged exposure to memory capex cycles and advanced-node DRAM/NAND ramps.
Fidelity Management & Research Company LLC filed an abbreviated large shareholding report disclosing that its combined holding (with affiliates and managed funds) decreased from 453,873 shares (5.83%) to 434,712 shares (5.59%) as of May 27, 2026. The change of -19,161 shares was attributed to the unwinding of a managed fund, not a strategic shift, and the holding purpose remains simple investment. Fidelity remains above the 5% reporting threshold, so further movements must continue to be disclosed. The filing covers Fidelity Management & Research Company LLC together with affiliates including FIAM LLC, Fidelity Institutional Asset Management Trust Company, and Fidelity Management Trust Company, plus numerous Fidelity-managed mutual funds across the U.S., Luxembourg, Canada, and Japan.
De facto controlling shareholder Jiwan Chung filed an amended large shareholding report with holdings unchanged at 3,479,596 shares (44.73%) and pledged/contracted shares also unchanged at 940,610 shares (12.09%). The filing reason is a modification to terms of a contract concerning held shares, not a buy or sell transaction. The reporter and 10 special-related parties (including Soulbrain Holdings, family members, and executives) collectively maintain the same control structure. Holding purpose remains 'influence over management' as the company's largest shareholder. No share count changes occurred between the prior report (May 6, 2026) and this report (May 28, 2026).
Q1 2026 consolidated revenue reached KRW 263.8 billion, with the semiconductor segment dominating at KRW 221.9 billion (84%), followed by secondary battery (KRW 18.1B, 7%) and display (KRW 13.5B, 5%). Semiconductor material selling prices rose ~3% YoY while raw material costs jumped ~9% YoY, indicating margin pressure from input inflation. Secondary battery material input costs surged ~49% YoY against a ~3% selling price decline, signaling significant margin compression in that segment. Q1 utilization at the Gongju semiconductor plant was 53% (24,111 of 45,648 tons capacity). Key customers remain Samsung Electronics, SK hynix, Samsung Display, LG Display, Samsung SDI, SK On, and LG Energy Solution.