ISC

The company will participate in the Daiwa Asia Conference held in Singapore on June 10-11, 2026, sponsored by Daiwa Securities. Management will hold one-on-one meetings with Singapore-based global investment institutions to present the H1 2026 business status and investment plans. IR materials will be posted on the KRX KIND system on June 10, 2026. This event provides an opportunity to engage with global investors and could enhance overseas institutional interest in the stock.

Samsung Asset Management disclosed an increased holding in ISC from 5.08% (1,077,810 shares) to 6.32% (1,340,264 shares), a net gain of 262,454 shares since the prior report dated February 9, 2026. The filing is a simplified (abbreviated) 5% report under the Financial Investment Services and Capital Markets Act, indicating the purpose is simple investment, not management influence. The shares are held primarily through customer accounts (집합투자 / discretionary mandates), and changes reflect routine market buying/selling plus ETF creation/redemption activity. As a passive institutional accumulation rather than activist positioning, the disclosure signals continued institutional confidence but carries limited direct catalyst weight.

ISC filed its annual large business group status disclosure as a member of the SK Group, chaired by Chey Tae-won. The filing reports FY2024 standalone revenue of KRW 182.2 billion, operating profit of KRW 47.7 billion, and net income of KRW 48.0 billion, with a low debt-to-equity ratio of 13.24%. Affiliate changes include the additions of Tech Dream (Hong Kong) via share acquisition and absorption mergers of ITMTC and ISEMI, plus the divestiture of SMATECH and liquidation of ISC Japan R&D Center, resulting in a net decrease of three affiliates. The board also appointed three new directors in March 2026, including non-executive directors from SKC, reflecting tighter integration with the SK Group governance structure.

ISC filed a correction to its semi-annual subcontract payment disclosure for H2 2025 (Jul 1 - Dec 31, 2025), originally submitted on Feb 12, 2026. The only fix is a typo: the 'paid within 10 days' amount was shown as '27,542,' (with a trailing comma) and is corrected to '27,542' (thousand KRW). All substantive figures remain unchanged: total subcontract payments of KRW 30.54 billion, 100% paid in cash, with 93.42% settled within 10-15 days. The filing also reflects the absorption merger of subsidiary I-Semi into ISC. No dispute resolution body has been established.

ISC reported Q1 2026 consolidated revenue of KRW 68.27 billion, with elastomer (silicone rubber) test sockets remaining the core business at roughly 80% of sales and an estimated ~90% global market share in that segment. The company is actively supplying AI semiconductor test sockets to global big-tech, fabless, OSAT, and ASIC customers, having entered non-memory mass production in 2023 and ramping fabless customers from 2024. ISC also consolidated its newly acquired equipment/materials businesses (iSemi, Techdream) acquired in Q2 2025, adding module testers, high-speed burn-in testers, EFEM, cleaning chemicals for DRAM/HBM etch, and PCB lines targeting the AI/HBM test market. Q1 production reached 5.48 million units (1.31M test sockets + 4.17M pogo pins), with raw materials (silicone, powder) totaling KRW 23.85 billion. Product mix: manufactured products 83.4%, merchandise 15.6%, services/other 1.0%.