Outsourced Assembly & Test market share 2024
As of 2024, the Outsourced Assembly & Test segment is led by ASE Technology at 27%, followed by Amkor Technology at 14%. The market is competitive (HHI 1,143), with the top 3 firms holding 52% combined.
Data as of 2026-06-15 · basis: revenue (2024) · confidence: estimate
Market share by company
| Company | Revenue share | Market cap / revenue |
|---|---|---|
| ASE Technology | 27% | $100.6B mkt cap |
| Amkor Technology | 14% | $13.5B mkt cap |
| JCET Group | 11% | $20.8B mkt cap |
| Powertech Technology (PTI) | 6% | $6.5B mkt cap |
| Tongfu Microelectronics | 6% | $14.2B mkt cap |
| Huatian Technology | 5% | $9.0B mkt cap |
| Other (fragmented tail) | 31% | — |
Source: https://en.wikipedia.org/wiki/Semiconductor_assembly_and_test_services. Shares are approximate consensus estimates rounded for legibility. The fragmented "other" tail is excluded from HHI, so the figure is a conservative lower bound.
Concentration
- HHI: 1,143 — Competitive
- Top firm (CR1): 27%
- Top 3 (CR3): 52%
- Top 5 (CR5): 64%
Open the interactive market-share view →
Track the chain
What moved in the semiconductor supply chain — This Week in the Chain, the free weekly wafergraph briefing.
Subscribe to the free weekly briefing →
Free · no login · 615 companies, updated weekly