In September 2026, the global semiconductor industry is undergoing a subtle inventory cycle reversal. Driven by the AI wave, chip demand shows a clear divergence: on one hand, the demand for AI training chips and high-performance computing chips remains robust, keeping related supply chains fully utilized; on the other hand, consumer electronics chip inventories are gradually depleting, while demand for industrial and automotive chips remains sluggish, leading to inventory buildup in some sectors. The inventory performance of foundries, OSATs, and material suppliers in Singapore, a core hub of the Southeast Asian semiconductor supply chain, serves as an important window into the global semiconductor market trend. This article will deeply analyze the current semiconductor market trends from three dimensions: global inventory status, Singapore supply chain dynamics, and industry interpretation, providing decision-making references for investors.
I. Global Chip Inventory Status: Intensifying Divergence and Initial Signs of Cycle Reversal
According to data from industry research institutions, global chip sales in the second quarter of 2026 increased by 15% year-on-year, reaching a historical high, yet inventory levels present a "double-edged sword" situation. In the AI chip sector, orders from manufacturers like Nvidia and AMD remain full, causing upstream wafer fabrication plants (such as TSMC and Samsung) to maintain capacity utilization above 95%, with inventory levels at a low point. However, in the consumer electronics sector, chip inventories for smartphones and laptops have dropped to their lowest point in nearly five years, with some manufacturers even experiencing "zero inventory." In contrast, the demand growth for industrial control chips and automotive chips is weak, leading to inventory turnover days for related companies extending beyond 120 days, far exceeding the industry average of 60-80 days.
Behind this divergent pattern is the structural reshaping of chip demand by AI technology. AI training chips require higher computing power, driving a surge in demand for advanced processes (such as 3nm and 5nm), while consumer electronics chips are gradually releasing inventory pressure due to market saturation. It is worth noting that the inventory situation for memory chips (DRAM, NAND Flash) is also changing: spot prices for DRAM are slowing their upward trend, but NAND wafer prices rose by 4.55% weekly, indicating that memory chips are moving from a de-stocking phase to a replenishment cycle. This change is mainly due to the growing demand for large-capacity storage from AI servers and the stocking needs of smartphone manufacturers for NAND Flash.
1.1 AI Chips: Sustained Strong Demand and Low Inventory Levels
AI chips are the "star track" in the current semiconductor market, with their demand growth primarily stemming from two areas: AI training servers for large cloud service providers (such as Amazon and Google), and the popularization of edge AI devices. According to forecasts from the market research company Gartner, the global AI chip market size will reach $85 billion in 2026, a 30% year-on-year increase. Driven by this demand, the capacity utilization of advanced process wafer fabricators remains high, with inventory levels maintained within 20 days, far below the industry average of 45 days.
Taking TSMC as an example, its 3nm capacity is fully occupied by AI chip orders, even leading to a situation where "a single chip is hard to find." Samsung Electronics, on the other hand, meets the demand for AI chips by expanding its 5nm process capacity. This capacity tightness leads to a continuous rise in advanced process wafer prices; in the third quarter of 2026, 3nm wafer prices rose by 15% compared to the same period last year, and 5nm wafer prices rose by 10%.
1.2 Consumer Electronics Chips: Inventory Depletion and Signs of Demand Recovery Consumer electronics chips are a vital component of the semiconductor market, with demand primarily stemming from end products such as smartphones, laptops, and tablets. In the second quarter of 2026, global smartphone shipments declined by 5% year-on-year, yet chip inventories have dropped to their lowest levels in nearly five years. This phenomenon is attributed to severe inventory build-up of consumer electronics chips in 2025, which led manufacturers to significantly reduce orders in 2026, consequently causing inventory levels to decrease.
As inventories bottomed out, demand for consumer electronics chips began to recover. According to Counterpoint Research data, in the third quarter of 2026, chip orders from smartphone manufacturers grew by 8% compared to the second quarter, mainly driven by the release of new models (such as the Apple iPhone 16 series and Samsung Galaxy S25 series) and the proliferation of 5G phones. Furthermore, chip demand for laptops also rebounded; in the third quarter of 2026, laptop shipments increased by 3% year-on-year, gradually boosting the inventory levels of related chips.
1.3 Industrial and Automotive Chips: Weak Demand and Inventory Build-up
Unlike AI chips and consumer electronics chips, the demand for industrial control chips and automotive chips has been sluggish, leading to inventory accumulation. The demand for industrial control chips primarily comes from traditional industries such as manufacturing and energy, while the demand for automotive chips is driven by the electrification upgrades in new energy vehicles and traditional automobiles. In the second quarter of 2026, global sales of industrial control chips declined by 2% year-on-year, and automotive chip sales grew by 1% year-on-year, but the growth rate was far below that of AI chips, which grew by 30%.
The reason for inventory build-up is the slow progress of digital transformation in traditional industries and the slowing growth of new energy vehicle penetration. Taking automotive chips as an example, while global new energy vehicle sales increased by 15% in the second quarter of 2026, the inventory turnover days for automotive chips extended to 130 days, mainly due to overstocking by some manufacturers, leading to inventory accumulation. Moreover, the inventory turnover days for industrial control chips also extended to 125 days, far exceeding the industry average of 60 days.
II. Singapore Semiconductor Supply Chain: Inventory Dynamics Reflect Industry Trends
As a core hub of the Southeast Asian semiconductor supply chain, the inventory performance of foundries, OSATs, and material suppliers in Singapore directly reflects the trends of the global semiconductor market. In September 2026, the inventory levels in Singapore's semiconductor industry exhibited a pattern of "low inventory in advanced processes and recovering inventory in mature processes," which aligns with the global market's divergence.
2.1 Wafer Fabrication: Advanced Processes at Full Capacity, Mature Processes Rebounding
Major wafer foundries in Singapore include TSMC (Singapore facility), GlobalFoundries, and United Microelectronics Corporation (UMC). TSMC's Singapore facility primarily produces AI chips using advanced processes (such as 3nm and 5nm), while GlobalFoundries and UMC focus on chips using mature processes (such as 28nm and 40nm). In September 2026, TSMC's Singapore facility maintained a capacity utilization rate above 98%, with inventory levels within 15 days, mainly due to the continuous growth in AI chip orders. In contrast, GlobalFoundries and United Microelectronics Center's Singapore plants saw their capacity utilization rise from 75% in Q2 2026 to 80%, and their inventory turnover days decreased from 90 days to 75 days. This shift is attributed to the recovery in demand for mature process chips, primarily from the consumer electronics and industrial control sectors.
It is noteworthy that the inventory levels of silicon wafers in Singapore also changed. In Q2 2026, the silicon wafer inventory turnover was 60 days, which shortened to 50 days in September 2026, mainly due to the increased demand for silicon wafers from AI chips and manufacturers securing capacity through long-term contracts. For instance, the ten-year contract signed by TSMC with a silicon wafer supplier locked in silicon wafer supply for the next decade, leading to a decrease in silicon wafer inventory levels.
2.2 Packaging and Testing Industry: AI-Driven Price Revaluation and Gradual Inventory Absorption
The packaging and testing industry in Singapore is mainly dominated by STATS ChipPAC and ASE's Singapore facilities. In September 2026, the capacity utilization rate of packaging and testing plants remained above 85%, and the inventory turnover days decreased from 70 days in Q2 2026 to 60 days. This change is due to the growing demand for packaging and testing of AI chips and the depletion of inventory for consumer electronics chips.
STATS ChipPAC, as Singapore's largest packaging and testing facility, saw a 10% increase in orders in Q3 2026 compared to Q2, mainly driven by the demand for AI chip packaging and testing. ASE's Singapore plant benefited from the recovery in consumer electronics chips, with an 8% increase in orders. Furthermore, packaging and testing prices showed an upward trend; in Q3 2026, the packaging and testing price for AI chips increased by 5% compared to Q2, mainly due to tight capacity and growing demand.
It is also worth noting that the inventory structure of packaging and testing plants changed. In Q2 2026, AI chips accounted for 30% of the packaging and testing inventory, while consumer electronics chips accounted for 50%. In September 2026, this proportion became 40% and 40%, indicating an increase in the proportion of AI chip inventory and a decrease in the proportion of consumer electronics chip inventory. This change reflects the packaging and testing plants adjusting their inventory structure to meet changing market demands.
2.3 Material Suppliers: Silicon Wafers at Full Capacity, Material Price Cycle Begins
Material suppliers in Singapore mainly include silicon wafer manufacturers (such as Shin-Etsu Chemical, SUMCO) and packaging material manufacturers (such as Nitto Denko). In September 2026, the silicon wafer inventory turnover shortened to 45 days, mainly due to the increased demand for silicon wafers from AI chips and manufacturers securing capacity through long-term contracts. Shin-Etsu Chemical's Singapore plant maintained a capacity utilization rate above 95%, with inventory levels within 20 days, while SUMCO's Singapore plant also reached a capacity utilization of 90%, and the inventory turnover shortened to 50 days.
In terms of packaging materials, the inventory turnover days for packaging substrates decreased from 80 days to 70 days in Q3 2026, mainly due to the increased packaging demand for AI chips. Nitto Denko's Singapore plant saw a 12% increase in orders in Q3 compared to Q2, mainly driven by the demand for packaging materials for AI chips. Furthermore, packaging material prices also showed an upward trend; in Q3 2026, the price of packaging substrates increased by 3% compared to Q2, mainly due to tight capacity and growing demand.
III. Industry Insights: Inventory Cycle Reversal and Reshaping Investment Logic
The current semiconductor market inventory cycle is transitioning from "de-stocking" to "re-stocking," a shift that will profoundly impact investment logic. Investors need to pay attention to the following key points:
3.1 AI Chips: Long-term Demand Growth, Focus on Advanced Processes and Packaging and Testing
AI chips are the core driver of the current semiconductor market, and their demand growth is boosting the performance of advanced process wafer foundries and packaging and testing facilities. Investors should focus on companies with technological advantages in advanced processes, such as TSMC and Samsung Electronics, as well as packaging and testing firms like ASE and Amkor. Furthermore, AI chip designers (such as Nvidia and AMD) are also key investment targets because they are core beneficiaries of AI chip demand.
It is worth noting that AI chip inventory levels remain low, meaning that advanced process wafer and packaging and testing capacity will remain tight, and prices are expected to continue rising in the near future. Therefore, investors can look at companies with plans for capacity expansion in advanced processes, such as TSMC's Singapore fab, whose expansion will lead to performance growth.
3.2 Consumer Electronics Chips: Inventory Bottoming Out, Watching for Recovery Signals
The bottoming out of consumer electronics chip inventory signals the emergence of demand recovery. Investors should focus on companies with advantages in the consumer electronics chip sector, such as Qualcomm and MediaTek, as well as smartphone manufacturers like Apple and Samsung. Moreover, the reduction in inventory turnover days for consumer electronics chips implies improved cash flow for these companies, which can drive stock price increases.
It should be noted that the recovery in consumer electronics chip demand is gradual, not explosive. Therefore, investors should choose companies with cost advantages and market share, rather than blindly chasing hot stocks. For example, Qualcomm's strength in 5G chips and MediaTek's market share in low-to-mid-range smartphone chips are key investment focuses.
3.3 Industrial and Automotive Chips: Inventory Buildup, Focusing on Structural Optimization
The inventory buildup in industrial and automotive chips suggests weak demand growth in these segments, requiring caution from investors. However, with the digital transformation of traditional industries and the popularization of new energy vehicles, these sectors still have growth potential. Investors should focus on companies with technological advantages in industrial control chips and automotive chips, such as Infineon and NXP, as well as new energy vehicle manufacturers like Tesla and BYD.
It is important to note that the inventory buildup in industrial and automotive chips takes time to digest, so the performance growth of these companies may be slow. Investors should choose companies with long-term competitive advantages rather than short-term speculation. For instance, Infineon's market share in industrial control chips and NXP's strengths in automotive chips are key investment focuses.
3.4 Singapore Semiconductors: Supply Chain Resilience, Focusing on Local Companies
Singapore, as a core of the Southeast Asian semiconductor supply chain, will see its semiconductor companies benefit from the recovery of the global semiconductor market. Investors should pay attention to companies with production bases in Singapore, such as Micron and ASE, as well as silicon wafer manufacturers like Shin-Etsu Chemical and SUMCO. Furthermore, semiconductor industry policies introduced by the Singapore government (such as the Singapore Semiconductor Strategy 2025) will drive the development of local enterprises, and investors can focus on companies that benefit from policy support.
It is worth noting that inventory levels of Singaporean semiconductor companies are gradually improving, which means their cash flow will improve, thereby driving stock price increases. For example, Micron's inventory turnover days shortened from 70 days in Q2 2026 to 60 days, indicating an improvement in its inventory management capabilities, which will lead to earnings growth.
IV. Future Trend Forecast: Inventory Replenishment Cycle Begins, Industry Landscape Reshaping
Looking ahead, the semiconductor market's inventory cycle will enter the "inventory replenishment" phase, which will last for 1-2 years. During this phase, demand for advanced process wafers, packaging and testing, and memory chips will remain strong, while demand for consumer electronics chips will gradually recover. Here are several key trends in the future semiconductor market:
AI chip demand continues to grow: With the popularization of AI technology, the demand for AI chips will continue to grow, driving capacity expansion in advanced process wafers and packaging and testing. It is estimated that the global AI chip market size will reach $120 billion in 2027, a year-on-year increase of 40%.
Consumer electronics chip recovery: As inventories bottom out, the demand for consumer electronics chips will gradually recover, driving earnings growth for related companies. It is estimated that the global consumer electronics chip market size will reach $80 billion in 2027, a year-on-year increase of 10%.
Optimization of industrial and automotive chip structure: With the digital transformation of traditional industries and the popularization of new energy vehicles, the demand for industrial and automotive chips will gradually increase, driving earnings growth for related companies. It is estimated that the global industrial control chip market size will reach $30 billion in 2027, a year-on-year increase of 5%, and the automotive chip market size will reach $50 billion, a year-on-year increase of 8%.
Enhancement of Singapore's semiconductor supply chain status: As the global semiconductor supply chain diversifies, Singapore's position as a core of the Southeast Asian semiconductor supply chain will be further enhanced. It is estimated that the output value of Singapore's semiconductor industry will reach $50 billion in 2027, a year-on-year increase of 15%.
Conclusion
In September 2026, the global semiconductor market showed reversal signals in its inventory cycle, with AI chip demand continuing to diverge, consumer electronics chip inventories bottoming out, and industrial and automotive chip demand being sluggish. The inventory performance of foundries, OSATs, and material suppliers in Singapore, as a core of the Southeast Asian semiconductor supply chain, reflects industry trends. For investors, attention should be paid to investment opportunities in AI chips, consumer electronics chips, and Singaporean semiconductor companies, while treating investments in the industrial and automotive chip sectors with caution. With the start of the inventory replenishment cycle, the semiconductor industry landscape will gradually be reshaped, and companies with technological advantages and market share will have opportunities for earnings growth.
