In the AI server and network equipment market, the competitive landscape among PCB manufacturers is shifting from "securing demand" to "securing production capacity." Since an influx of orders cannot translate into revenue without sufficient equipment, the ability to complete capacity expansions first and operate stably has emerged as the key variable determining financial performance.

At the center of this competition is ISU Petasys. The company specializes in high-multilayer printed circuit boards (PCBs) used in servers and network equipment. It has established its position in the AI accelerator and high-performance network equipment markets with products that stack multiple circuit layers to increase signal processing capacity and transmission speed. However, the supply relationships with specific customers frequently mentioned in the market — such as Nvidia, Google, and Microsoft — have not been officially disclosed by the company. Therefore, rather than making definitive claims about actual trading partners, it is necessary to focus on demand, production capacity, and performance itself.

First Revenue Surpassing KRW 1 Trillion Since Founding

According to a Korea Exchange filing, ISU Petasys reported consolidated revenue of KRW 1.0887846 trillion for 2025, a 30.1% increase from the previous year. This marks the first time the company has surpassed annual revenue of KRW 1 trillion since its founding. Operating profit rose 101.0% to KRW 204.7245 billion, and net income climbed 116.8% to KRW 160.4826 billion. The operating margin stood at approximately 18.8%, and the fact that operating profit growth outpaced revenue growth suggests that product mix improvement and production efficiency gains occurred alongside business expansion.

Three Key Points to Monitor Going Forward

Caution is needed when directly linking recent stock price volatility to earnings trends. The factors to watch going forward can be narrowed down to three. First, whether the utilization rate of Plant 5 ramps up as planned, passes customer certification, and translates into actual sales volume. Second, the yield and profitability of multilayer products. Even if the proportion of high-value-added products increases, a simultaneous rise in defect rates could fall short of the targeted profit margin. Third, how effectively the capital raised through a paid-in capital increase boosts production capacity and operating profit, thereby offsetting the dilution from the new share issuance.

Market Outlook and Investment Cautions

During periods when market direction can shift rapidly, investors should be cautious about concluding trends based solely on a single day's gains or losses. Stocks that have risen sharply may see profit-taking sell-offs, while conversely, rotational buying may emerge as capital flows into sectors that have undergone corrections. Ultimately, the near-term focus of the domestic stock market will depend on how well the KOSPI and KOSDAQ digest volatility and establish direction. Rather than focusing solely on short-term fluctuations of individual stocks, investors need to monitor market trends comprehensively, taking into account the movements of both major indices, trading values, foreign and institutional supply and demand, and sector rotation.

[※ This article is intended for informational purposes only, and investment decisions and their associated responsibilities rest solely with the investor. As matters related to specific stocks and companies are highly volatile and fluid, please verify further through the latest disclosures and multiple sources before making investment decisions. This article was partially assisted by AI.]