Shares of AXT Inc. (NASDAQ: AXTI) soared more than 17% in recent trading, reaching levels near $45 as investor enthusiasm builds around the company's role in supplying critical materials for artificial intelligence infrastructure and high-speed optical connectivity.

AXT Inc
AXT Inc

The Fremont-based semiconductor substrate manufacturer closed at approximately $45.37 on heavy volume, marking a significant rally from earlier levels in the $30 range. The stock has shown extreme volatility in recent months, trading within a 52-week range from $1.13 to $47.03, reflecting both challenges and growing optimism tied to AI data center expansion.

AXT specializes in compound semiconductor substrates, including indium phosphide (InP) wafers, which are essential for high-performance lasers and detectors used in data communications, particularly for AI-driven optical networks. Demand for these materials has intensified as hyperscale data centers require faster, more efficient interconnects to handle massive AI workloads.

In its latest earnings report released Feb. 19, 2026, AXT reported fourth-quarter 2025 revenue of $23.0 million, down from prior expectations and reflecting headwinds from export permit delays out of China. For the full fiscal year 2025, revenue totaled $88.3 million, a decline from $99 million in 2024. The company posted a GAAP net loss of $21.3 million, or $0.49 per share, widening from the previous year's loss.

Despite the miss, management highlighted improving conditions in early 2026. "We are pleased to report that we have received some permits to date in 2026 and believe we are in a strong position to achieve sequential revenue growth in Q1, driven primarily by growth in indium phosphide for the AI infrastructure build-out," AXT executives stated in the earnings release.

The company cited delays in export permits from China's Ministry of Commerce as a key factor limiting fourth-quarter shipments of indium phosphide products. In January 2026, AXT had updated guidance to $22.5 million to $23.5 million for the quarter, lower than an earlier $27 million to $30 million outlook, due to fewer permits issued in December.

However, the backlog for indium phosphide has grown substantially, reaching record levels amid surging customer demand from the AI sector. AXT plans to use proceeds from a December 2025 public offering to expand capacity significantly. The offering raised funds through the sale of common stock, with underwriters exercising their full option to purchase additional shares.

Executives indicated that capacity for indium phosphide production is targeted to more than double in the second half of 2026, positioning the company to capitalize on expected growth in optical connectivity for AI data centers.

Options trading activity has reflected bullish sentiment. On recent sessions, call option volume surged significantly above average, with traders positioning for further upside. Analysts and market observers have noted the stock's rally as tied to broader enthusiasm for AI-related supply chain plays, even as the company navigates geopolitical and regulatory hurdles.

Insider activity has been mixed. Recent filings show directors selling shares, including notable transactions by Director David C. Chang and others, amid the stock's run-up. In one instance, a director sold shares at prices around $38 to $45, reducing positions modestly. Insiders own about 8.8% of the company.

The stock's performance comes against a backdrop of challenges in the semiconductor materials sector, including supply chain constraints and export controls affecting sales to certain markets. AXT's products also include gallium arsenide and germanium substrates used in 5G, industrial sensing and other applications, but indium phosphide has emerged as the primary growth driver.

Market watchers point to AXT's strategic focus on AI as a catalyst. High-speed optical transceivers reliant on InP substrates are critical for data center interconnects supporting large language models and generative AI applications. As major tech companies ramp up infrastructure investments, suppliers like AXT stand to benefit if permit issues resolve and capacity comes online as planned.

Volatility remains a factor. The stock experienced sharp swings following the earnings release, with some profit-taking after an initial post-earnings pop. Earlier in the year, shares languished at low levels before the AI narrative gained traction.

Looking ahead, AXT anticipates sequential improvement in the current quarter, assuming continued progress on permits. The company has emphasized strong underlying demand despite short-term obstacles.

Investors continue monitoring developments in U.S.-China trade relations, as export controls on advanced materials could impact future shipments. AXT's ability to scale production and secure orders will be key to sustaining momentum.

With a market capitalization approaching $2.5 billion at recent prices, AXT has transformed from a niche player into a name drawing attention in the AI supply chain conversation. Whether the rally holds depends on execution amid ongoing challenges and the pace of AI infrastructure deployment worldwide.