Recently, I’ve been looking at the leading server stocks for 2026, and I found the changes in this space to be quite interesting.

From the perspective of the industry chain, server-related companies are roughly divided into three tiers. The top tier is core complete-machine assembly plants (such as Foxconn, Quanta, and Wistron). The middle tier is infrastructure providers (Vertiv, Quanta, and Shuang-Hung). The downstream tier is key component manufacturers (Tatung Optoelectronics, Goldsun, and Qincheng). Each link benefits from the wave of explosive growth in AI data centers.

What I’ve been focusing on lately is five leading server stocks. First, on the U.S. stock market side, Celestica and Vertiv have both delivered impressive performance. Celestica, as a major supplier for Google TPU, reported revenue of $3.19 billion in the first three quarters of this year, up 28% year over year, and its EPS has jumped 52%. Wall Street analysts’ average 12-month target share price is $374.50, which implies about 22% upside from the current price. Vertiv’s liquid cooling solutions have become a necessity for AI data centers. In the third quarter, net sales were $2.676 billion, up 29% year over year. Order backlog reached $9.5 billion. The target share price is $206.07, with potential upside of 27%.

On the Taiwan stock market side, the leading server stocks are even more worth a closer look. As NVIDIA’s core supplier, Quanta’s revenue last year in the third quarter was NT$500 billion, up more than 20% year over year, and its quarterly net profit exceeded NT$15 billion. Wistron is a pure-play player focused on hyperscale data centers. Its full-year revenue was NT$950.6 billion, up 163% year over year, and its EPS reached 275 yuan, setting a profit record for Taiwan-listed stocks. The strongest is Foxconn: it has over 40% global market share in AI servers. The company is expected to exceed NT$8.1 trillion in full-year revenue, and management estimates that in 2026, revenue from AI-related business will reach a trillion-dollar scale.

However, when I look at the rally rates of these leading server stocks, I feel a bit cautious. Their P/E ratios are already at high levels, and market concentration is extremely high. If the growth rate of AI investment slows or signs of a bubble appear, the downside pullback pressure could be significant. In particular, factors such as a shorter depreciation cycle and rising electricity costs may suppress reported profits.

For investing in this direction in 2026, you should keep tracking several key variables: whether cloud service providers can meet their expected investment scale, progress in non-x86 architecture chips, and the development potential of agent systems and edge AI, as well as the impact of China’s self-developed chips, data sovereignty policies, and trade frictions on the supply chain. Most importantly, whether the market can shift from hype around AI concepts to verification of real business value—this will determine whether the leading server stocks can maintain steady growth.

Overall, the long-term logic of this sector is clear, but the short-term risks are not small. If you’re interested in these targets, it’s recommended to build your position in batches—don’t go all in at once.