ASE Technology Rises 27% in a Month: Should You Buy the Stock?

• ASX's LEAP business is driving margin expansion, with ATM gross margin rising to 27.3% in Q2 2026 from 21.9% a year earlier, and management expects margins to exceed 30% by Q4 2026
• The company is managing 13 greenfield and 8 brownfield projects to add capacity through 2028-2029, with a new panel-level packaging line expected to start production in Q1 2027
• ASX trades at a forward P/E of 26.32X, significantly above the semiconductor industry average of 14.24X, reflecting high growth expectations from AI-driven packaging demand

ASE Technology Stock Summary

Stock Performance:

ASE Technology (ASX) has surged 27% over the past month, significantly outperforming the Zacks Electronics-Semiconductors industry's 8.9% gain and peers including Amkor Technology (AMKR), GlobalFoundries (GFS), and Synaptics (SYNA).

Key Growth Drivers:

The company's leading-edge advanced packaging (LEAP) services are experiencing robust demand driven by AI infrastructure requirements. ASX now expects 2026 LEAP revenues to exceed its original $3.5 billion target by several hundred million dollars, with management targeting a doubling of LEAP revenues in 2027. The Zacks Consensus Estimate projects revenue growth of 27.9% in 2026 and 22.5% in 2027.

Financial Performance:

Q2 2026 ATM revenues increased 36% year-over-year to TWD 126.1 billion. ATM gross margin expanded to 27.3% from 21.9% a year earlier, with management projecting margins above 30% in Q4 2026 as higher-margin LEAP and test businesses gain traction.

Capacity Expansion:

ASX added $2 billion to its 2026 capital expenditure plans to expand LEAP capacity, managing 13 greenfield and eight brownfield projects expected to provide capacity through 2028 and into 2029. The company is also expanding CoWoS capabilities and launching a fully-automated panel-level packaging line in Q1 2027, expected to generate TWD 300 million in 2026 revenues.

Valuation & Recommendation:

Trading at a forward P/E of 26.32X versus the industry's 14.24X, ASX's premium valuation reflects high growth expectations. The stock carries a Zacks Rank #2 (Buy), with technical indicators showing bullish momentum as it trades above both 50-day and 200-day moving averages.