Is AXTI a good stock to buy? We came across a bullish thesis on AXT, Inc. on PhotonCap’s Substack. In this article, we will summarize the bulls’ thesis on AXTI. AXT, Inc.’s share was trading at $78.76 as of April 20th. AXTI’s forward P/E was 24.21 according to Yahoo Finance.
AXT, Inc. designs, develops, manufactures, and distributes compound and single-element semiconductor substrates. AXTI has emerged as a pivotal player in the rapidly expanding AI infrastructure market, despite appearing fundamentally constrained by its financials. From early 2025, when its share price languished near $1, AXTI surged past $37 by March 2026, delivering an extraordinary 12-month return of over 2,268%, driven not by top-line growth—the company reported $88.3 million in revenue for FY2025, down 11.1% year-over-year, with a $21.3 million GAAP net loss—but by its critical position in AI optical interconnects.
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As AI data centers powered by NVIDIA H200/B200 GPUs and Broadcom Tomahawk 5 switches push node-to-node speeds beyond 800G to 1.6T, copper wiring has reached its physical limits, and optical fiber networks have become essential. AXT’s Indium Phosphide (InP) substrates are uniquely capable of supporting defect-free epitaxial growth for lasers and photodetectors operating at 1310nm and 1550nm wavelengths, enabling long-reach, ultra-low-loss data transmission that GaAs and silicon cannot match.
Founded in 1986 and headquartered in Fremont, California, AXTI maintains a deeply vertically integrated model through its Beijing-based Tongmei subsidiary, controlling raw material sourcing, refining, and wafer production, which provides cost advantages and supply security, albeit with geopolitical risk due to concentration in China.
InP’s lattice-matched properties are essential for InGaAs photodetectors, minimizing defects and dark current, a critical factor in 1.6T communications. While revenue and profitability are temporarily constrained by export controls and geopolitical tensions, AXTI’s strategic moat in InP substrates positions it at the center of the AI optical interconnect bottleneck, offering a compelling investment narrative driven by its irreplaceable technological role and extreme demand from next-generation AI data centers.
Previously, we covered a bullish thesis on Lam Research Corporation (LRCX) by The Antifragile Investor in May 2025, which highlighted the company’s essential role in semiconductor fabrication, high-margin service flywheel, and strategic positioning across global chipmakers. LRCX’s stock price has appreciated by approximately 217.86% since our coverage. PhotonCap shares a similar view but emphasizes AXT Inc.’s (AXTI) critical role in AI optical interconnects, leveraging Indium Phosphide substrates as a bottleneck material for next-generation data centers.
AXT, Inc. is not on our list of the 40 Most Popular Stocks Among Hedge Funds. As per our database, 34 hedge fund portfolios held AXTI at the end of the fourth quarter which was 7 in the previous quarter. While we acknowledge the risk and potential of AXTI as an investment, our conviction lies in the belief that some AI stocks hold greater promise for delivering higher returns and doing so within a shorter time frame. If you are looking for an AI stock that is more promising than AXTI and that has 10,000% upside potential, check out our report about this cheapest AI stock.
Disclosure: None.
