Semiconductor & AI supply-chain companies in South Korea
As of 2026-10-09, wafergraph tracks 43 semiconductor and AI supply-chain companies headquartered in South Korea, across 8 value-chain segments, most of them in Materials (17). The largest by market cap is Samsung Electro-Mechanics at $87.1B; the 29 priced companies total $174.2B. 5 hold a monopoly or leader position in their segment.
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Data as of 2026-10-09 · country = headquarters, not fab location · market caps from the daily wafergraph pipeline (Yahoo × SEC shares); unpriced companies are listed but not summed
36 of 43 companies in South Korea have a nonzero supply-chain criticality score in Wafergraph's data.
Largest South Korea companies by market cap
| Company | Segment | Position | Market cap | Ticker |
|---|---|---|---|---|
| Samsung Electro-Mechanics | Substrates | major | $87.1B | KRX:009150 |
| Hanmi Semiconductor | Bonders | leader | $18.9B | KRX:042700 |
| LG Innotek | Substrates | major | $10.1B | KRX:011070 |
| Jusung Engineering | Deposition | major | $9.1B | KOSDAQ:036930 |
| Daeduck Electronics | Substrates | niche | $6.1B | KOSPI:353200 |
| Leeno Industrial | Probe Cards | major | $5.0B | KOSDAQ:058470 |
| Wonik IPS | Deposition | major | $4.8B | KOSDAQ:240810 |
| DB HiTek | Pure-Play Foundry | niche | $4.4B | KRX:000990 |
| HPSP | Deposition | leader | $3.9B | KOSDAQ:403870 |
| ISC | Test Equipment | major | $3.1B | KOSDAQ:095340 |
| PSK Inc | Etch | niche | $3.1B | KOSDAQ:319660 |
| Eugene Technology | Deposition | niche | $2.9B | KOSDAQ:084370 |
| Soulbrain | Photoresists & Chemicals | major | $2.4B | KOSDAQ:357780 |
| Hansol Chemical | Photoresists & Chemicals | major | $2.2B | KRX:014680 |
| Dongjin Semichem | Photoresists & Chemicals | major | $1.9B | KOSDAQ:005290 |
All 43 companies by segment
Materials (17)
- SK Specialty — Korean specialty-gas maker and a top global NF3 supplier.
- Samsung Electro-Mechanics — Samsung affiliate making IC substrates, MLCCs, and camera modules.
- LG Innotek — LG affiliate making IC substrates, camera modules, and components.
- Soulbrain — Korea's leading process-chemical and etchant maker, including high-purity HF.
- Hansol Chemical — Korean precursor and process-chemical supplier to memory and logic fabs.
- Dongjin Semichem — Korean photoresist and process-chemical maker supplying Samsung and SK hynix.
- Wonik Materials — Korean specialty-gas and precursor supplier for chip fabs.
- Simmtech — Korean maker of semiconductor substrates and memory-module PCBs.
- SK Siltron — SK Group's wafer arm; key 300mm supplier to Korean memory fabs.
- Daeduck Electronics — Korean PCB and IC-substrate manufacturer.
- Foosung — Korean fluorine chemicals and specialty-gas maker.
- Haesung DS — Korean leadframe and package-substrate maker.
- MK Electron — Korean bonding-wire and solder-materials maker.
- DNF — Korean maker of CVD/ALD precursors and thin-film materials.
- Doosan Electro-Materials — Korean copper-clad laminate and IC-substrate materials maker.
- SK Enpulse — SK affiliate; divested CMP pads to Hahn & Co. and blank photomasks to Fusion New Material in 2025; absorbed into parent SKC via merger effective 2025-12-23, ceasing as an operating company.
- UP Chemical — Korean maker of CVD/ALD precursors for chip fabrication.
Equipment (Front End) (10)
- HPSP — Near-monopoly maker of high-pressure hydrogen annealing equipment.
- Jusung Engineering — Korean ALD, CVD, and epitaxy equipment maker.
- Wonik IPS — Korean deposition and thermal-process equipment maker for memory fabs.
- Hana Materials Inc. — South Korean maker of silicon and SiC electrodes/rings consumed in semiconductor dry-etch equipment.
- SEMES — Samsung's in-house equipment arm; etch, cleaning, and packaging tools.
- PSK Inc — Korean dry-strip and etch equipment maker.
- Eugene Technology — Korean LPCVD and ALD deposition equipment specialist.
- Park Systems — Leading atomic-force-microscopy (AFM) metrology maker.
- Wonik QnC — Korean quartzware and ceramic components maker for fab tools.
- KCTECH — Korean cleaning and CMP equipment maker.
Design (Fabless) (5)
- LX Semicon — Korea's largest fabless display driver IC designer, an LG affiliate.
- FuriosaAI — Korean AI inference chip startup.
- Rebellions — Korean AI accelerator startup formed by merger with Sapeon.
- Telechips — Korean automotive infotainment and display SoC designer.
- Panmnesia — South Korean fabless startup shipping CXL 3.2 fabric switch silicon for composable AI memory disaggregation.
OSAT (4)
- SFA Semicon — Korean OSAT, the former STS Semiconductor.
- Nepes — Korean OSAT specializing in fan-out advanced packaging.
- LB Semicon — Korean OSAT focused on display driver packaging.
- Hana Micron — Korean OSAT serving Samsung and SK hynix memory packaging.
Equipment (Back End) (3)
- Hanmi Semiconductor — Korean leader in TC bonders used to stack HBM memory.
- Leeno Industrial — Korean probe pin and test socket maker.
- ISC — Korean burn-in and test socket maker.
IDM (2)
- Samsung Electronics — World's largest memory maker, plus leading-edge foundry and Exynos design.
- Magnachip Semiconductor — Display driver and power IDM with analog mixed-signal heritage.
Memory (1)
- SK hynix — HBM leader supplying NVIDIA; top-two in DRAM, owns Solidigm NAND.
Foundry (1)
- DB HiTek — Korean 200mm analog and power specialty foundry.
Tracked revenue
30 of the 43 companies report revenue in the dataset, totalling $357.7B (latest fiscal year per company, SEC EDGAR or Wikidata).
Frequently asked questions3
- How many semiconductor companies are in South Korea?
- wafergraph tracks 43 semiconductor and AI supply-chain companies headquartered in South Korea, across 8 segments.
- What is the largest semiconductor company in South Korea?
- Samsung Electro-Mechanics is the largest South Korea company in the dataset by market cap ($87.1B, as of 2026-10-09).
- How many South Korea semiconductor companies have a supply-chain criticality score?
- 36 of 43 companies in South Korea have a nonzero supply-chain criticality score in Wafergraph's data.
Cite as: wafergraph, “Semiconductor companies in South Korea — 43 tracked, ranked by market cap”, https://wafergraph.com/country/south-korea/ (data as of 2026-10-09).