Sungho Electronics

Sungho Electronics, founded in 1973 and listed on KOSDAQ in 2001, has built its business on manufacturing and selling power supply units (PSU/SMPS) and film capacitors.

Sales split broadly into power and capacitor divisions, and one media report describes the power supply unit business as the core, at roughly 73% of sales, with the company ranking first domestically in set-top box power and supplying printer and multifunction device makers such as HP and Sindoh.

Film capacitors are passive components used in digital TVs and PCs, and the company is one of the few domestic players that produces the key raw material, metallized film, in-house, giving it a vertically integrated capacitor process.

Production is spread across Korea plus consolidated subsidiaries in China and Vietnam. The decisive change to the business mix is optical communications equipment.

In December 2025 the company disclosed the purchase of an 87.5% stake in ADS Tech for about KRW 280.0bn, and the transaction closed on 13 February 2026, bringing the target in as a subsidiary.

Founded in 2000, ADS Tech specializes in optical transceiver alignment equipment that aligns lasers, lenses and optical fibers inside optical modules at nanometer scale, and it has worked with Mellanox, now part of Nvidia, since 2015.

The stake had been held through wholly owned Amazing Holdings, which the company resolved in April 2026 to absorb in a small-scale merger with no new shares issued, with the merger date disclosed as 3 July 2026.

Separately, June 2026 media reports covered an acquisition of semiconductor equipment maker Intimax and an optical connection technology memorandum of understanding with LG Innotek, pointing to continued expansion.

On confirmed figures, 2022 was weak with revenue of KRW 153.6bn, operating profit of KRW 2.0bn (1.3% margin) and a net loss to owners of KRW 4.2bn, before 2023 improved sharply to revenue of KRW 208.1bn, operating profit of KRW 25.9bn (12.4%) and net profit of KRW 17.6bn.

The high 2023 margin included property pre-sale related revenue, and in 2024 revenue stalled at KRW 207.3bn while operating profit collapsed to KRW 6.3bn (3.0%). The company cited the end of the pre-sale project in 2Q24 and unpaid balances amid a construction downturn as reasons for the earnings swing.

In 2025 revenue rose to KRW 231.6bn (+11.7%) and operating profit to KRW 7.6bn (3.3%), yet net profit to owners reached KRW 91.0bn, roughly twelve times operating profit.

Analyses attributed that gap largely to non-cash items such as derivative valuation gains linked to convertible bonds, and operating cash flow that year was KRW 20.1bn, far below reported net profit.

Quarterly, margins were compressed in 3Q25 with revenue of KRW 55.6bn and operating profit of KRW 0.5bn, then both scale and profit expanded through 4Q25 (KRW 60.2bn / KRW 4.1bn), 1Q26 (KRW 66.0bn / KRW 3.2bn) and 2Q26 (KRW 85.2bn / KRW 6.9bn).

The 2Q26 operating margin of just above 8% was the highest of the last five quarters, suggesting the consolidation of the optical alignment subsidiary is beginning to show in the income statement.

Net profit to owners, however, flipped from a KRW 319.5bn gain in 1Q26 to a KRW 46.1bn loss in 2Q26; given reports that the first-quarter figure reflected book gains on mezzanine derivatives arising from the acquisition, a reversal of valuation items is a plausible driver, but the detail should be checked in the original filing.

On the balance sheet, total equity grew from KRW 143.5bn in 2024 to KRW 254.0bn in 2025, lowering the debt-to-equity ratio from 156.0% to 128.8%.

The key end-market driver is the shift of AI data centers toward optical interconnect. According to market researcher LightCounting, Ethernet optical transceiver revenue doubled in 2024, grew 70% in 2025 and is projected to expand about 60% in 2026.

The global supply chain is also in expansion mode: Coherent posted fiscal 4Q26 revenue of USD 2.05bn, up 34% year on year, while Fabrinet reported USD 1.316bn, up 45%, with its data center segment up 68%.

Industry participants see this capacity race translating directly into demand for equipment that precisely aligns and bonds optical fibers and lenses.

Technologically, the rise of co-packaged optics, which integrates chips and optical components in one package, increases the number of alignment points and is argued to structurally expand demand for active alignment tools.

The competitive field is narrow: Shinhan Securities argued in a June 2026 report that only ADS Tech and unlisted Picontec make dedicated CPO equipment globally.

Daishin Securities, in a June 2026 report, countered that passive alignment approaches such as POET Technologies' optical interposer could raise productivity but still lack mass-production validation, and flagged a possible split between high-precision and commodity segments.

Meanwhile the legacy film capacitor and power supply business is a mature market contested by domestic peers such as Samwha Capacitor and Samyoung Electronics alongside Japanese suppliers, with electric vehicles, solar inverters and energy storage cited as the medium and large capacitor growth axis.

Order flow at the subsidiary has been disclosed fairly steadily through the media. In April 2026 Sungho Electronics said ADS Tech had won its first order from Broadcom for a CPO chip tester with added semiconductor inspection functions, with the unit price reportedly rising from about KRW 350m to KRW 650m.

Around the same time the company described a follow-on order from Nvidia for smaller, faster versions of previously supplied CPO tools and an order for 21 active alignment machines from Lumentum.

In May, orders from Corning and Fabrinet were disclosed, and a late-August 2026 report described a purchase order worth USD 16.45m (about KRW 23.5bn) for CPO production equipment from a New York Stock Exchange listed technology firm.

On capacity, the new plant secured in May 2026 at Dongtan Techno Valley in Hwaseong is intended to lift output to about 1,000 units a year initially and to 1,300-1,400 units once expansion is complete, with completion targeted for February to March 2027.

In June 2026 it was reported that ADS Tech had signed an agreement with Samsung Electronics to jointly develop a silicon photonics based CPO alignment system.

Broker forecasts have followed: Shinhan Securities in a June 2026 report projected consolidated operating profit of KRW 34.0bn in 2026, KRW 74.1bn in 2027 and KRW 177.4bn in 2028, while Daishin Securities in a June 2026 report expected active alignment equipment to exceed 75% of sales from 2027.

In the same report, Daishin also stated that if Nvidia delays server-side optical I/O adoption or the ASIC market opens more slowly, embedded expectations could become a burden.

In the legacy business, development of medium and large capacitors for electric vehicles, solar and energy storage continues, but no official company-issued annual guidance could be verified.