Semiconductor packaging and testing company Amkor Technology (NASDAQ:AMKR) reported revenue ahead of Wall Street’s expectations in Q4 CY2025, with sales up 15.9% year on year to $1.89 billion. On top of that, next quarter’s revenue guidance ($1.65 billion at the midpoint) was surprisingly good and 7% above what analysts were expecting. Its GAAP profit of $0.69 per share was 56.8% above analysts’ consensus estimates.
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Amkor (AMKR) Q4 CY2025 Highlights:
- Revenue: $1.89 billion vs analyst estimates of $1.83 billion (15.9% year-on-year growth, 3% beat)
- EPS (GAAP): $0.69 vs analyst estimates of $0.44 (56.8% beat)
- Adjusted EBITDA: $369 million vs analyst estimates of $317.2 million (19.5% margin, 16.3% beat)
- Revenue Guidance for Q1 CY2026 is $1.65 billion at the midpoint, above analyst estimates of $1.54 billion
- EPS (GAAP) guidance for Q1 CY2026 is $0.23 at the midpoint, missing analyst estimates by 1.5%
- Operating Margin: 9.8%, up from 8.3% in the same quarter last year
- Inventory Days Outstanding: 25, up from 21 in the previous quarter
- Market Capitalization: $12.98 billion
StockStory’s Take
Amkor’s fourth quarter results were met with a positive market reaction, as the company outpaced Wall Street’s expectations for both revenue and profit. Management attributed the outperformance to robust demand in advanced packaging and data center computing, as well as a surge in communications, particularly from iOS devices. CEO Kevin Engel, in his first call as chief executive, highlighted that "all end markets exceeded expectations, with the largest upside coming from communications, driven primarily by strong iOS demand." Operational improvements, notably in Vietnam’s facility and the ramp-up of advanced packaging programs, also contributed to margin expansion and strong execution in a dynamic industry environment.
Looking ahead, Amkor’s guidance reflects high expectations for continued growth in computing and advanced automotive markets, supported by accelerated investments in new capacity and technology platforms. Management views the company’s technology leadership and expanding global footprint as key enablers for 2026, with Engel stating that Amkor’s focus is on “launching new programs across advanced packaging platforms, including HDFO, flip chip, and test, which are critical to next-generation AI and high-performance computing.” CFO Megan Faust added that capital expenditures will be heavily front-loaded to support facility expansion and equipment for anticipated demand, while ongoing partnerships and customer commitments underpin the company’s outlook.
Key Insights from Management’s Remarks
Management linked the strong Q4 results to progress in advanced packaging, improved operational execution, and strategic expansion into new markets and technologies.
- Advanced packaging momentum: Amkor reported record revenue from advanced packaging, with management crediting the ramp-up of high-density fan-out (HDFO) programs and deep customer engagement in AI and high-performance computing (HPC) as primary drivers. These platforms are viewed as essential for supporting next-generation data center and PC applications.
- Geographic expansion: The company achieved breakeven at its Vietnam facility, which is now supporting the migration of System-in-Package (SiP) products, freeing up capacity in Korea for advanced packaging growth. Construction at the new Arizona campus is underway, providing further supply chain flexibility and regional diversification.
- Communications and computing strength: Communications revenue was propelled by strong demand for premium iOS devices, while computing continued multi-year acceleration due to AI-related PC and networking device demand. Management noted that premium tier shifts in both smartphones and PCs benefit Amkor’s content share.
- Automotive growth: Automotive and industrial sales saw significant gains, particularly from advanced automotive content for driver assistance systems (ADAS). Management highlighted a gradual recovery in mainstream automotive and robust growth in advanced automotive applications.
- Operational improvements: Optimization efforts in Japan, efficiency gains in Vietnam, and a favorable mix toward high-value advanced packaging contributed to stronger operating margins and improved profitability in the quarter.
Drivers of Future Performance
Management expects future growth to be driven by continued investment in advanced packaging, customer partnerships, and geographic expansion, while closely monitoring market and policy risks.
- Capacity expansion and CapEx focus: Amkor’s 2026 capital expenditure will be heavily weighted toward facility expansion—including its Arizona campus—and advanced packaging equipment. Management explained that most spending will be front-loaded and that customer commitments, including prepayment and loading agreements, provide confidence in high utilization rates as new capacity comes online.
- AI and automotive market trends: The company expects over 20% growth in computing, led by AI and data center demand, and continued strength in advanced automotive. Management cautioned that while PC and mainstream automotive markets may be flat, the shift toward premium and AI-enabled products is expected to drive higher content and margins for Amkor.
- Risks and headwinds: Management identified export controls, trade policy changes, and substrate and memory supply dynamics as ongoing risks. They noted that government incentives and customer funding will offset some investment needs but that most incentive benefits will lag initial capital outlays.
Catalysts in Upcoming Quarters
In the coming quarters, the StockStory team will be monitoring (1) the pace and efficiency of capacity expansion in Arizona and Korea, (2) successful ramp-up and monetization of new AI and automotive packaging programs, and (3) progress in securing additional customer commitments and government incentives for ongoing investments. Execution against these milestones, as well as management’s ability to navigate supply chain and policy risks, will be key to sustaining growth.
Amkor currently trades at $54.15, up from $52.41 just before the earnings. Is there an opportunity in the stock?Find out in our full research report (it’s free).
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