ASE Technology Holding

What ASE Technology Holding does

ASE Technology Holding Co., Ltd. (NYSE: ASX; TAIEX: 3711) is the world's largest provider of independent outsourced semiconductor assembly and test (OSAT) services, headquartered in Kaohsiung, Taiwan, and operating through three core subsidiaries: ASE, Inc., Siliconware Precision Industries (SPIL), and USI (Universal Scientific Industrial). Founded in 1984 as Advanced Semiconductor Engineering, ASE Technology Holding was formed through the 2010 ASE-SPIL merger and the 2018 acquisition of USI, building a vertically integrated platform spanning advanced packaging, assembly, testing, materials, and electronic manufacturing services.

The company's core technology portfolio centers on advanced packaging for AI accelerators and high-performance computing, including Chip-on-Wafer-on-Substrate (CoWoS), Fan-Out Chip-on-Substrate (FOCoS), FOCoS-Bridge, VIPack, fan-out wafer-level packaging, system-in-package (SiP), and 2.5D/3D heterogeneous integration. ASE operates an industry-first automated 310mm x 310mm panel-level packaging line (96,100 mm² usable area, production H1 2027) and produces the LEAP (Leading-Edge Advanced Packaging) service line, which scaled from $1.6B in 2025 to a projected >$3.5B in 2026. Taiwan-based facilities supply over 60% of global advanced packaging capacity, and CoWoS capacity is projected to triple to 20,000-25,000 wafers/month. Manufacturing spans Taiwan, China, Malaysia, Singapore, Korea, Japan, Vietnam, Mexico, and the United States, with customers including Nvidia, AMD, Broadcom, MediaTek, Google, Amazon, and Apple.

ASE generates revenue through B2B semiconductor packaging and testing services under quote-based enterprise contracts. The ATM (Assembly, Testing, and Materials) segment delivered NT$112.4B in Q1 2026 (+29.7% YoY) while the EMS segment declined 0.7% YoY to NT$61.875B, indicating that advanced packaging for AI is the primary growth engine while consumer electronics manufacturing softens. Full-year FY2025 consolidated revenue reached NT$645.4B (US$20.8B, +8.4% YoY) and Q1 2026 revenue was NT$173.66B (US$5.5B, +17.2% YoY), with gross margins expanding to 20.1% from 16.8% as LEAP scale improves mix. GTM is direct enterprise sales to chip designers and hyperscalers, supported by TSMC overflow CoWoS outsourcing and qualification-locked capacity allocations with anchor customers.

Name

ASE Technology Holding

Legal name

ASE Technology Holding Co., Ltd.

Website

https://aseglobal.com

Company type

Public

Founded year

1984

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

ASE Technology Holding is the world's largest independent OSAT, providing advanced semiconductor packaging (CoWoS, FOCoS, panel-level) and testing services to AI accelerator and HPC chip designers including Nvidia, AMD, Broadcom, and major hyperscalers, operating through ASE, SPIL, and USI.

Ownership category

akta.pro rank

Product category

Semiconductor Packaging and Testing (OSAT)

NAICS

Computer and Electronic Product Manufacturing (334)

SIC

Semiconductors & Related Devices (3674), Electronic Components & Accessories (3670)

akta.pro primary industry

Outsourced Semiconductor Manufacturing Services (Back-End EMS/Turnkey) (HDAHADAJ)

akta.pro secondary industries

Advanced Packaging (2.5D/3D-IC, Fan-Out WLP, Chiplets) (HDAHADAB), Package Substrates & Interposers (ABF/BT, Silicon/Glass) (HDAHADAE)

Keywords

• Semiconductor packaging services
• Chip assembly testing
• Advanced packaging solutions
• OSAT services
• Heterogeneous integration

Headquarters

HQ city

Kaohsiung

HQ country

Taiwan

HQ region

Asia

Offices19 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Infrastructure, Personnel, Operations, Supply Chain

Revenue model

1. ATM (Assembly, Testing, and Materials) Services: Core semiconductor packaging and testing services including advanced packaging for AI chips. This segment drives growth with 29.7% YoY revenue increase to NT$112,434 million in Q1 2026. Q4 2025 full-year ATM segment saw 24.2% YoY increase with gross margin of 26.3%.
2. EMS (Electronic Manufacturing Services): Electronic manufacturing services segment providing design and manufacturing services for various electronic products. This segment declined 0.7% YoY to NT$61,875 million in Q1 2026, indicating softer demand in consumer electronics manufacturing.
3. Advanced Packaging (LEAP): High-margin advanced packaging services for AI and data center chips, transforming ASE from low-margin OSAT provider to high-margin advanced packaging services. Gross margins improved from 16.80% to 20% in Q1 2026.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

ASE Technology Holding is the world's largest independent provider of outsourced semiconductor assembly and test (OSAT) services, offering advanced packaging technologies such as CoWoS, FOCoS, FOCoS-Bridge, VIPack, and panel-level packaging for AI accelerators, HPC chips, automotive electronics, and consumer devices. The company operates three core subsidiaries (ASE, SPIL, and USI) and an Assembly, Testing and Materials (ATM) segment that delivered NT$112.4 billion in Q1 2026 revenue, up 29.7% year-over-year, while LEAP advanced packaging revenue is projected to exceed US$3.5 billion in 2026.

Product overview

ASE Technology Holding is the world's largest chip packaging and testing provider, operating as a unified platform combining three major subsidiaries: ASE, SPIL (Siliconware Precision Industries), and USI. The company offers a comprehensive portfolio of advanced packaging and system integration services centered on its LEAP (Leading-Edge Advanced Packaging), VIPack, FOCoS, FOCoS-Bridge, CoWoS, and panel-level packaging technologies. These services serve the AI accelerator, HPC, and semiconductor industries with advanced heterogeneous integration capabilities. The ATM (Assembly, Testing, and Materials) segment represents the core semiconductor packaging and testing operations, while panel-level packaging innovations like the 310mm automated line and FO-PLP represent next-generation offerings. The company recently announced industry-first automated 310mm panel-level packaging production capabilities and strategic collaborations for advanced AI packaging hubs.

Differentiator

Problem solved

Functional benefit

Brands

• LEAP (Leading-Edge Advanced Packaging): Advanced packaging services for AI chips and high-performance computing applications, including CoWoS-like technology
• FO-PLP Panel-Level Packaging
• FOCoS and FOCoS-Bridge Packaging
• EFB Interconnect (Elevated Fanout Bridge)

Products and services

• LEAP (Leading-Edge Advanced Packaging) Services Leading-Edge Advanced Packaging services providing CoWoS-like advanced packaging solutions for AI accelerators, high-performance computing chips, and cutting-edge semiconductor applications. Revenue exceeded US$1.6 billion in 2025 and is projected to exceed US$3.5 billion in 2026.
• VIPack Advanced Packaging Platform Advanced packaging platform designed for high-density, high-performance applications as part of ASE's heterogeneous integration portfolio targeting AI and HPC workloads.
• FOCoS (Fan-Out Chip-on-Substrate) Packaging Fan-out wafer-level packaging technology providing high interconnect density and supporting complex multi-die architectures for advanced semiconductor applications.
• FOCoS-Bridge Packaging Advanced fan-out packaging technology with bridge interconnect capabilities for heterogeneous integration of multiple chips in a single package.
• CoWoS Packaging Services Chip-on-Wafer-on-Substrate packaging technology for AI chips, serving major customers including Nvidia. ASE also acts as an outsourced CoWoS packaging partner receiving overflow work from TSMC, with CoWoS capacity projected to triple to 20,000-25,000 wafers/month by year-end.
• 310mm Panel-Level Packaging Production Line Industry-first automated 310mm x 310mm panel-level packaging production line providing up to 96,100 mm² of usable area per panel, enabling greater die density and improved material efficiency compared to traditional wafer formats. Expected to enter production in H1 2027 and supports FOCoS and FOCoS-Bridge packaging for AI and HPC applications.
• FO-PLP (Fan-Out Panel-Level Packaging) Production Line Fully automated, economically viable Fan-Out Panel-Level Packaging production line, claimed to be the world's first of its kind, positioning ASE at a critical chokepoint in the AI hardware supply chain.
• System-in-Package (SiP) Integration Services System-in-package integration services combining multiple chips and components into a single package for miniaturization and performance optimization, serving consumer electronics, mobile, and IoT device manufacturers.
• ATM (Assembly, Testing and Materials) Services Core semiconductor assembly, testing, and materials services segment; Q1 2026 ATM revenues reached NT$112.4 billion, up 29.7% year-over-year, driven by AI infrastructure and advanced packaging demand.
• EFB (Elevated Fanout Bridge) Interconnect Technology Power-efficient 2.5D panel-based packaging interconnect technology developed with AMD for next-generation AI systems, supporting high-bandwidth heterogeneous integration.
• EMS (Electronic Manufacturing Services) Electronic manufacturing services, optical communications, and system-in-package modules provided through subsidiary USI, including design and manufacturing services for various electronic products. Q1 2026 EMS revenue was NT$61,875 million.

Quantifiable outcome

• Advanced packaging revenue to exceed $3.5 billion in 2026, up from $1.6 billion in 2025 (167% growth)
• +3 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature5 records

Partnerships

Eleven partnerships are on record, tiered core, strategic and minor.

• Siliconware Precision Industries (SPIL)coreStrategic or Co-development Partner · 24 June 2026SPIL is a subsidiary of ASE Technology Holding and serves as a major packaging supplier for Nvidia's AI chips. Nvidia announced plans to build up to $500 billion worth of AI server infrastructure in the U.S. with partners including SPIL. SPIL is also leading NVIDIA's development of the more technically demanding CoWoP packaging technology.
• AMDcoreStrategic or Co-development Partner · 21 May 2026AMD announced $10 billion investment in Taiwan AI ecosystem, establishing strategic partnerships with ASE Technology Holding and Siliconware Precision Industries to develop power-efficient packaging technologies for AI systems. ASE is developing Elevated Fanout Bridge interconnect technology and qualifying 2.5D panel-based EFB interconnect with PTI for AMD.
• WUS (WUS Printed Circuit Co., Ltd.)strategicStrategic or Co-development Partner · 8 May 2026ASE and WUS announced strategic collaboration to build advanced AI packaging hub in Kaohsiung, Taiwan, announced May 8, 2026.
• AEM HoldingsstrategicStrategic or Co-development Partner · 23 March 2026Strategic partnership combining AEM's proprietary test technologies with ASE's manufacturing scale to deliver AI and HPC testing solutions. ASE invested S$12 million through private placement of 3.35 million shares (1.06% equity stake) plus 28.1 million free warrants. Transaction supports ISE Labs' expansion of AI and HPC processor development capabilities.
• TSMCcoreStrategic or Co-development Partner · 8 December 2025TSMC's CoWoS-L and CoWoS-S advanced packaging lines are reportedly fully booked. TSMC is outsourcing overflow orders to ASE Technology and SPIL to meet surging demand from AI chip clients. ASE's CoWoS capacity projected to triple to 20,000-25,000 wafers/month by year-end.
• SEMI (Semiconductor Equipment and Materials International)strategicOthers · 31 December 2024ASE is a member of SEMI for over 2 decades, serving as chairman of International Board of Directors' Executive Committees, chairman of SEMI Foundation Board of Directors, chair of SEMI Taiwan Packaging and Testing Committee, and honorary vice chair of SEMI Taiwan Smart Manufacturing Committee. Also founding sponsor of SEMI Silicon Photonics Industry Alliance (SiPhIA) together with TSMC.
• Taiwan Semiconductor Industry Association (TSIA)strategicOthers · 31 December 2024ASE Inc. is a founding member and board director of TSIA, chairing the EHS packaging and testing committee. Participates in sustainability discussions and prepares recommendations for government policies affecting the semiconductor packaging and testing industry.
• IOWN Global ForumminorOthers · 31 December 2024ASE is a member of IOWN Global Forum, an industry alliance with more than 150 leading global companies founded by NTT, Intel, and Sony. Forum aims to develop All-Photonics Network and data center infrastructure using photonic communications for greater capacity, lower latency, and higher energy efficiency.
• Responsible Business Alliance (RBA)minorOthers · 31 December 2024ASE joined RBA as member in 2015 and administers annual self-assessment questionnaires at facilities worldwide to identify labor, environmental and ethical risks. RBA has launched RMI Investor Network to advance responsible sourcing.
• Taiwan Institute for Sustainable Energy (TAISE)minorOthers · 31 December 2024ASE is a member supporting TAISE to form Taiwan Alliance for Net Zero Emission, committing to Net Zero X 2030/2050 initiative.
• Silicon Photonics Industry Alliance (SiPhIA)strategicOthers · 31 December 2024Established by SEMI together with TSMC and ASE as founding sponsors, with initial members including more than 30 companies such as AUO, Hon Hai (Foxconn) and MediaTek. Alliance aims to strengthen industry collaboration and advance silicon photonics development in Taiwan.

Scale indicators13 records

Recent moves12 records

Expansion highlights6 records

Broad incumbents

• Intel Foundry Services: Operating its own advanced packaging facilities (Foveros, EMIB) for foundry customers. Represents both an alternative source for advanced packaging capacity and a potential customer for ASE's overflow services, depending on foundry strategy.
• TSMC: The world's largest foundry with in-house CoWoS-L and CoWoS-S advanced packaging currently fully booked. Outsources overflow CoWoS work to ASE, making it both a critical partner and the single largest competitive threat to ASE's advanced packaging franchise.

Direct peers

• Hana Microelectronics: Thailand-headquartered OSAT and EMS provider serving IC assembly and test across multiple end markets. Smaller scale and broader consumer/industrial focus but competes in similar back-end services.
• Amkor Technology: US-headquartered OSAT and ASE's closest direct competitor, offering advanced packaging services including 2.5D/3D and fan-out for AI and HPC customers. Competes head-to-head with ASE/SPIL for TSMC overflow CoWoS work.
• King Yuan Electronics (KYEC): Taiwan-based pure-play semiconductor test company, a leading competitor to ASE's test services. Pure test focus makes it more specialized than ASE but directly comparable in test capacity for AI/HPC chips.
• Powertech Technology (PTI): Taiwan-based OSAT providing advanced packaging and testing services. ASE is qualifying its 2.5D panel-based EFB interconnect with PTI for AMD, indicating both collaboration and overlap in fan-out packaging for AI systems.
• Shinko Electric Industries: Japan-based IC packaging substrate and advanced packaging provider, partnered with IBM on flip-chip and 2.5D technology. Competes with ASE in advanced packaging substrates and interposers critical for AI accelerators.
• JCET (Jiangsu Changjiang Electronics Technology): China's largest OSAT provider competing in mainstream and advanced packaging. A scaled alternative for customers seeking China-sourced capacity, and a direct competitor to ASE's Shanghai/Wuxi/Suzhou/Kunshan operations.
• ChipMOS Technologies: Taiwan-based OSAT offering assembly, testing, and bumping services. Smaller scale than ASE but competes in similar advanced packaging and test segments including display driver and memory packaging.
• Tongfu Microelectronics: Major Chinese OSAT serving advanced packaging and test needs across memory and logic, partially backed by TSMC. Competes with ASE in the mid-tier and is investing in advanced packaging capacity for AI.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/ASE.Group
• YouTubeyoutube.com/channel/UCBJ-Gws4X2hWNigI1q7klvw
• LinkedInlinkedin.com/company/ase-group
• Xx.com/asegroup_global

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries5 records

Funding overview

Funding rounds1 record

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments1 record

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ASE Technology Holding