Key keywords: AXT Q2 2024 earnings, AI infrastructure demand, compound semiconductor substrates, AXT share price surge, AI data center components, gallium arsenide substrates, indium phosphide wafers, semiconductor supply chain Semiconductor substrate manufacturer AXT Inc. saw its share price skyrocket more than 31% in after-hours trading on August 6, 2024, following the release of its second-quarter fiscal 2024 financial results that handily beat Wall Street consensus estimates, driven almost entirely by surging demand for components used in AI infrastructure buildouts. For the three months ended June 30, 2024, AXT reported total revenue of $82.3 million, representing a 47% year-over-year increase and surpassing analyst projections of $71.2 million. Adjusted diluted earnings per share came in at $0.42, more than double the $0.19 reported in the same quarter last year and 50% higher than the consensus estimate of $0.28. Gross margins also expanded significantly, rising 720 basis points year over year to 42.1%, driven by a shift to higher-margin product lines tailored for AI applications. Management noted that revenue from AI-related products accounted for 58% of total Q2 revenue, up from just 19% in Q2 2023, as global cloud providers and tech giants accelerate construction of AI data centers to support large language model training and inference workloads. AXT’s core products, including gallium arsenide substrates and indium phosphide wafers, are critical components in high-speed optical transceivers, power semiconductors, and radio frequency devices that form the backbone of modern AI infrastructure. The company counts leading optical module manufacturers such as Finisar, Lumentum, and Coherent among its top customers, all of which have reported record order backlogs tied to AI spending from firms like NVIDIA, Microsoft, and Google. AXT CEO Morris Young highlighted in the earnings call that the company invested over $45 million in capacity expansion between 2022 and 2023, positioning it to capture a larger share of the fast-growing AI component market. “We began scaling production of high-purity compound substrates two years ago when we saw early signs of growing demand for advanced hardware to support AI workloads,” Young said. “Our order book is currently filled through the first quarter of 2025, and we are on track to expand production capacity by 35% by the end of 2024 to meet unmet demand.” Industry analysts project that global spending on AI infrastructure will exceed $500 billion in 2024, with demand for compound semiconductor substrates growing at a compound annual growth rate of 62% through 2027. Year to date, AXT’s share price has risen more than 187%, outperforming the broader semiconductor sector by more than 120 percentage points.