ASX Up 230.9% in the Past Year: Should You Capitalize on the Euphoria?

• ATM gross margin expanded to 27.3% in Q2 2025 from 21.9% year-over-year, with expectations to exceed 30% by Q4 2026, driven by higher LEAP volumes and improved utilization
• ASX increased 2026 capex to approximately $10.5 billion, allocating 70% of its $6.5 billion equipment budget to leading-edge operations across 13 greenfield and 8 brownfield expansion projects
• Second-quarter earnings surged 167.9% year-over-year while revenues climbed 26.7%, with the company maintaining a Zacks Rank #1 (Strong Buy) rating

Summary: ASE Technology (ASX) Surges 230.9% on AI Packaging Demand

Key Performance

ASE Technology Holdings (ASX) shares have soared 230.9% over the past year, significantly outperforming the broader market's 25.6% gain and peers including Ultra Clean Holdings (UCTT, +135.4%) and Axcelis Technologies (ACLS, +7.3%).

Primary Growth Driver

The rally is fueled by surging demand for ASE Technology's Leading-Edge Advanced Packaging (LEAP) services, critical for increasingly complex AI semiconductors requiring sophisticated packaging, testing, and high-bandwidth memory integration. Advanced packaging has become essential as chipmakers combine advanced logic, chiplets, and memory components.

Financial Performance

ASE Technology's Assembly, Testing and Materials (ATM) segment demonstrated impressive margin expansion, with gross margins rising to 27.3% in Q2 2025 from 21.9% year-over-year. The company expects ATM margins to exceed 30% by Q4 2026. Second-quarter earnings jumped 167.9% year-over-year while revenues increased 26.7%, surpassing consensus estimates.

Aggressive Capacity Expansion

The company increased its 2026 capital expenditure by $2 billion to approximately $10.5 billion, with 70% of the $6.5 billion equipment budget allocated to leading-edge operations. ASE Technology is executing 13 greenfield and eight brownfield expansion projects, delivering additional capacity through 2028-2029.

Investment Outlook

ASE Technology holds a Zacks Rank #1 (Strong Buy) rating. The company's market leadership in advanced packaging, combined with technological expertise and expanding AI semiconductor demand, positions it favorably for sustained growth. However, success depends on timely capacity deployment to convert strong demand into continued revenue and margin expansion.