Semiconductor packaging and testing company Amkor Technology (NASDAQ: AMKR) beat Wall Street’s revenue 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 56.9% 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 (56.9% 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
- Free Cash Flow Margin: 1.1%, down from 15.5% in the same quarter last year
- Inventory Days Outstanding: 25, up from 21 in the previous quarter
- Market Capitalization: $12.2 billion
Company Overview
Operating through a largely Asian facility footprint, Amkor Technologies (NASDAQ: AMKR) provides outsourced packaging and testing for semiconductors.
Revenue Growth
A company’s top-line performance is one signal of its overall business quality. Strong growth can indicate it’s riding a successful new product or emerging trend. Amkor’s annualized revenue growth rate of 1.6% over the last two years was mediocre for a semiconductor business. Semiconductors are a cyclical industry, and long-term investors should be prepared for periods of high growth followed by periods of revenue contractions.
We at StockStory place the most emphasis on long-term growth, but within semiconductors, a half-decade historical view may miss new demand cycles or industry trends like AI. Amkor’s recent performance shows its demand has slowed as its annualized revenue growth of 1.6% over the last two years was below its five-year trend. 
This quarter, Amkor reported year-on-year revenue growth of 15.9%, and its $1.89 billion of revenue exceeded Wall Street’s estimates by 3%. Beyond the beat, we believe the company is still in the early days of an upcycle as this was the third consecutive quarter of growth - a typical upcycle tends to last 8-10 quarters. Company management is currently guiding for a 24.9% year-on-year increase in sales next quarter.
Looking further ahead, sell-side analysts expect revenue to grow 7.8% over the next 12 months. While this projection suggests its newer products and services will catalyze better top-line performance, it is still below the sector average.
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Product Demand & Outstanding Inventory
Days Inventory Outstanding (DIO) is an important metric for chipmakers, as it reflects a business’ capital intensity and the cyclical nature of semiconductor supply and demand. In a tight supply environment, inventories tend to be stable, allowing chipmakers to exert pricing power. Steadily increasing DIO can be a warning sign that demand is weak, and if inventories continue to rise, the company may have to downsize production.
This quarter, Amkor’s DIO came in at 25, which is 5 days below its five-year average. These numbers show that despite the recent increase, there’s no indication of an excessive inventory buildup.
Key Takeaways from Amkor’s Q4 Results
It was good to see Amkor beat analysts’ EPS expectations this quarter. We were also glad its revenue guidance for next quarter exceeded Wall Street’s estimates. On the other hand, its inventory levels materially increased. Zooming out, we think this was a solid print. The stock traded up 1.8% to $53.54 immediately after reporting.
Indeed, Amkor had a rock-solid quarterly earnings result, but is this stock a good investment here? When making that decision, it’s important to consider its valuation, business qualities, as well as what has happened in the latest quarter. We cover that in our actionable full research report which you can read here (it’s free).
