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Doosan Tesna (131970) | Silicon Nexus

131970

Doosan Tesna

두산테스나

Price

Supply Chain Position

OSAT (Assembly/Test/Server)

Korean OSAT specializing in wafer test services for system semiconductors, particularly CMOS image sensors and SoCs.

Suppliers

Advantest
Teradyne

↓

Doosan Tesna

↓

Customers

Samsung Electronics
SK Hynix

Competitors

Amkor TechnologyASE TechnologyPowertech Technology

Recent Disclosures (2)

May 29, 2026low
Annual Large Business Group Status Disclosure (FY2025)
This is the annual large business group status disclosure as a member of the Doosan Group, covering company overview, financials, and ESG governance. FY2025 standalone results show revenue of KRW 303.9 billion with an operating loss of KRW 0.9 billion but net income of KRW 1.5 billion, while debt-to-equity stood at 61.02% with borrowings of KRW 200.5 billion. Notably, Cho Hoon was newly appointed as co-CEO alongside Kim Yoon-gun effective March 31, 2026, and Choi Ji-gwang joined as a new outside director and audit committee member. The board also approved significant capex including a Pyeongtaek new plant construction plan revision and additional machinery investments for new business response.

King Yuan Electronics

Notes

Korea's largest wafer test house, acquired by Doosan Group in 2022. Primary revenue driver is testing Samsung's CMOS image sensors; expanding into automotive and AP/SoC test capacity to diversify beyond the image sensor cycle.

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May 15, 2026low

Q1 2026 Quarterly Report (25th Fiscal Year)

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.