Disclosures

Doosan Tesna filed its Q1 2026 quarterly report covering January 1 to March 31, 2026, for its 25th fiscal year. The company, a semiconductor testing and engineering services provider, is now co-led by CEOs Yoon-Gun Kim and Hoon Cho following the appointment of Hoon Cho as CEO and Ji-Kwang Choi as outside director at the March 31, 2026 AGM, while former CEO Do-Won Kim stepped down. The board now consists of 2 CEOs and 4 outside directors. The largest shareholder remains Doosan Portfolio Holdings with 7,476,953 common shares following prior convertible preferred stock and BW conversions. The report also reflects the February 28, 2025 absorption merger of Engion Co., Ltd.

The Nature Holdings filed its Q1 2026 quarterly report covering January 1 to March 31, 2026, its 23rd fiscal year. The company maintains 11 consolidated subsidiaries (1 listed, 10 unlisted) with no changes during the period. At the March 25, 2026 AGM, three new directors were appointed: inside director Park Beom-jun and outside directors Kim Seong-tae and Hyun Jong-hyuk, while outside director Jung Chang-hee resigned mid-term. The credit rating from NICE D&B remains BBB+ (valid through May 22, 2026). The filing is routine periodic disclosure with no material business changes.

National Pension Service (NPS) reported a change in its holdings, with its stake declining from 10.02% to 9.99% as of May 13, 2026. The net change was a decrease of 860 shares through active intraday trading between May 7 and May 13, bringing total holdings to 4,042,185 shares. The crossing of the 10% threshold triggered this disclosure obligation, and NPS is now classified as holding less than 10%. Trading prices ranged from approximately KRW 186,000 to KRW 218,000 across the reporting period, reflecting significant share price volatility.

Hana Materials filed its 20th-period quarterly report covering January 1 to March 31, 2026. The company remains a mid-sized enterprise manufacturing silicon and silicon carbide (SiC) electrodes and rings used as consumable parts in semiconductor etching processes, with two non-listed consolidated subsidiaries unchanged from the prior period. The credit rating from eCredible was reaffirmed at BBB on March 24, 2026, holding steady since the 2024 downgrade from BBB+. At the March 23, 2026 AGM, Kang Dong-ho was newly appointed as an inside director and Choi Sun-jip as a new outside director, while inside director Choi Wang-ki was reappointed; inside director Kim Soon-young and outside director Jung Yong-joo retired upon term expiry. CEO Kim Hyun-joo continues to lead the board.

JUSUNG Engineering reported sharply weaker Q1 2026 results, with consolidated revenue down approximately 54.6% year-over-year to roughly KRW 54.9 billion. The company swung to an operating loss of about KRW 7.0 billion (operating margin -12.8%), a 120.7% deterioration versus the prior-year quarter, and posted a net loss of about KRW 1.2 billion. Management attributes the decline to increased R&D investment for future growth drivers and the timing of customer capex cycles. Semiconductor, solar cell, and display equipment remain the core business, with ALD/ALG deposition technology and next-generation tandem solar cell equipment (targeting >35% conversion efficiency) highlighted as strategic priorities. Equipment sales accounted for 81.1% of revenue (KRW 44.5 billion) while raw materials/parts contributed 18.9%.

The company reported on progress against its multi-year value-up plan, posting 2025 consolidated revenue of KRW 1,534.4 billion en route to targets of KRW 2,600 billion by 2027 and KRW 3,250 billion by 2030. Consolidated ROIC reached 6.3% in 2025, still well below the 10.8% medium-term target. A FY2025 dividend of KRW 70 per share was declared (exceeding 5% of FCFF), with a 12.19% payout ratio and only 0.16% YoY growth in total dividends paid. Shareholder engagement was strengthened via two CEO-led shareholder meetings, three NDRs with institutional investors, and a new IR inquiry page, while a basis for establishing board committees was added to enhance governance.

Mirae Asset Global Investments reported its ownership of DB HiTek common shares increased from 9.92% to 10.57% (4,599,432 shares) as of May 13, 2026, crossing the 10% major shareholder threshold. The 283,027-share net increase was driven primarily by ETF creation and redemption flows, along with stock lending returns and modest market buying/selling around the 152,000-189,000 won range. Crossing the 10% line triggers stricter disclosure obligations under Korean rules, requiring more frequent reporting of any future trades. The activity reflects index/ETF mechanical flows rather than an active conviction build by the asset manager.

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.