Connected context
This is a follow-up to The Complete KOSDAQ Guide, National Growth Fund and KOSDAQ Smart Money, Why Is KOSDAQ Falling If Foreigners Are Buying?, and Korea Foreign-Investor Playbook: KOSPI 168, KOSDAQ 355. Those posts covered KOSDAQ market reform, policy capital, foreign flow and institutional real money. This post narrows the next question: if the premium 70-name league becomes a passive-flow event, which KOSDAQ stocks should investors watch first?
TL;DR
The official 70-name list has not been published. This is not a confirmed inclusion list. The framework combines the reported direction of a tighter 70-company premium league, the existing KRX KOSDAQ Global Segment criteria, and Thesis OS data on market cap, trading value, foreign ownership and current KOSDAQ Global inclusion.
- Thirty names look hard to exclude from a 70-name premium league. The core group includes Alteogen, EcoPro BM, EcoPro, Rainbow Robotics, major semiconductor equipment/materials/substrate names, biotech platforms, medical-aesthetic compounders and entertainment leaders.
- The screen is not just market cap. The useful filter is market cap plus turnover plus KOSDAQ Global status plus likely fundamental and governance eligibility.
- Event alpha may sit less in names already inside KOSDAQ Global and more in large, liquid and representative names that are not yet in KOSDAQ Global: Rainbow Robotics, EO Technics, Jeju Semiconductor, Hana Micron, Dongjin Semichem, ISC, Eugene Technology and Seojin System.
If the KOSDAQ premium 70-name league becomes an index and ETF event, the market is likely to price 70 institutionally ownable KOSDAQ leaders, not the whole KOSDAQ market.
1. Why 70 matters
Seoul Economic Daily reported that Korea’s planned KOSDAQ premium league is being discussed as a tighter group of 70 companies, down from earlier ranges such as 80 to 170 or fewer than 100. Seoul Economic Daily
Seventy names would represent roughly the top 4% of about 1,800 KOSDAQ listings. That compression creates two effects. First, the premium league becomes a possible benchmark universe for pensions, institutions and ETFs. Second, inclusion and exclusion start to matter. A 170-name list is a broad quality list. A 70-name list is a first division.
The constraint is clear: there is still no official list and no final methodology. The job now is to prepare a candidate map before the official list arrives.
2. Existing KRX Global criteria are the starting point
The closest existing framework is the KRX KOSDAQ Global Segment. KRX uses market evaluation, operating performance, research performance and governance transparency. The standard route includes KRW 500 billion market cap or top 7% status, plus operating profit of at least KRW 30 billion or revenue of at least KRW 300 billion. Research-driven biotech companies have separate criteria. KRX also requires governance grades of B or better from at least two evaluators. KRX KOSDAQ Global rules
| Filter | Investor meaning |
|---|---|
| Market cap | Representative size for passive products |
| Trading value | Enough liquidity for rebalancing |
| Earnings or revenue | The league cannot be only a theme basket |
| Current KOSDAQ Global inclusion | Prior institutional validation |
| Governance | Minimum pension and institutional acceptability |
| Sector representation | Semis, biotech, batteries, robotics and entertainment define KOSDAQ |
3. The 30 core candidates
| Rank | Company | Code | Segment | Inclusion logic |
|---|---|---|---|---|
| 1 | Alteogen | 196170 | Biotech platform | Top KOSDAQ market cap, KOSDAQ Global, technology-transfer platform |
| 2 | EcoPro BM | 247540 | Battery materials | Key battery-materials leader with dominant size and liquidity |
| 3 | EcoPro | 086520 | Battery holding company | Representative battery holding/materials beta |
| 4 | Rainbow Robotics | 277810 | Robotics | Korea robotics leader and symbolic premium-league candidate |
| 5 | Jusung Engineering | 036930 | Semiconductor equipment | AI semiconductor equipment leader with strong liquidity |
| 6 | Wonik IPS | 240810 | Semiconductor equipment | KOSDAQ Global, equipment representative, earnings recovery |
| 7 | Leeno Industrial | 058470 | Test socket | Quality compounder with high ROE and margins |
| 8 | HPSP | 403870 | Semiconductor equipment | High-pressure hydrogen annealing leader |
| 9 | EO Technics | 039030 | Semiconductor equipment | HBM and laser-equipment representative |
| 10 | Simmtech | 222800 | PCB/SOCAMM | Key SOCAMM and substrate theme name |
| 11 | PSK | 319660 | Semiconductor equipment | Representative equipment-cycle earnings name |
| 12 | Jeju Semiconductor | 080220 | LPDDR/memory | LPDDR theme leader with heavy turnover |
| 13 | Hana Micron | 067310 | OSAT | Back-end memory beta and earnings recovery |
| 14 | Dongjin Semichem | 005290 | Materials | Large materials name with institutional access |
| 15 | TES | 095610 | Equipment | KOSDAQ Global and improving equipment-cycle name |
| 16 | Eugene Technology | 084370 | Equipment | DRAM/HBM capex beneficiary |
| 17 | ISC | 095340 | Test socket | AI memory test infrastructure |
| 18 | Soulbrain | 357780 | Materials | KOSDAQ Global quality materials leader |
| 19 | TCK | 064760 | Consumables | KOSDAQ Global, SiC ring and fab recovery |
| 20 | Park Systems | 140860 | Metrology | High-margin precision-equipment leader |
| 21 | LigaChem Biosciences | 141080 | ADC/biotech | KOSDAQ Global biotech platform |
| 22 | ABL Bio | 298380 | Biotech platform | KOSDAQ Global biotech growth name |
| 23 | PharmaResearch | 214450 | Medical aesthetics | KOSDAQ Global, strong growth and margins |
| 24 | Hugel | 145020 | Medical aesthetics | Large healthcare earnings name |
| 25 | Classys | 214150 | Medical devices | Quality aesthetic-device compounder |
| 26 | ST Pharm | 237690 | CDMO/RNA | KOSDAQ Global CDMO/RNA representative |
| 27 | Sam Chun Dang Pharm | 000250 | Pharma/biotech | Large pipeline and biosimilar option |
| 28 | Seojin System | 178320 | AI infrastructure | ESS, telecom and server infrastructure platform |
| 29 | JYP Ent. | 035900 | Entertainment | KOSDAQ Global entertainment earnings name |
| 30 | SM Entertainment | 041510 | Entertainment | Large KOSDAQ entertainment name |
4. Where event alpha may appear
If this becomes a passive product, the more interesting set is not-yet-KOSDAQ-Global names that could enter the new premium basket.
| Candidate | Why it matters | What to check |
|---|---|---|
| Rainbow Robotics | Symbolic robotics leader | Whether growth representation offsets near-term earnings filters |
| EO Technics | HBM/laser equipment | Whether the new rules differ from KOSDAQ Global |
| Jeju Semiconductor | LPDDR leader with high turnover | Earnings durability and crowding |
| Hana Micron | OSAT and memory back-end exposure | Earnings recovery and foreign-flow continuity |
| Dongjin Semichem | Large semiconductor-materials name | Stability and governance eligibility |
| ISC | AI memory test-socket exposure | Valuation pressure after re-rating |
| Eugene Technology | DRAM/HBM equipment cycle | Order and earnings visibility |
| Seojin System | ESS, telecom and server infrastructure | Whether it is recognized as AI infrastructure |
5. Borderline and excluded names
| Group | View |
|---|---|
| HLB, Kolon TissueGene, Peptron, D&D Pharmatech | Large market caps, but more dependent on clinical or event outcomes. They may enter the full 70 if growth is weighted heavily. |
| Pearl Abyss | Size and brand recognition are enough, but trailing losses and single-IP event risk keep it out of the core 30. |
| FADU | Representative AI storage story, but data quality, valuation and flow volatility keep it in the event bucket. |
| Low-liquidity theme stocks | They can react early, but turnover and governance are bottlenecks for passive inclusion. |
6. Strategy
| Step | What to check | Interpretation |
|---|---|---|
| 1 | Official list | Confirm actual inclusion |
| 2 | Index methodology | Market-cap weighting, equal weighting, cap rule, rebalance timing |
| 3 | Linked ETFs/funds | Actual passive-buying capacity |
| 4 | Post-inclusion flow | Foreign, investment-trust, pension and program-buying persistence |
Before the official list, this is a candidate map, not a confirmed trade. The true event is the list plus index methodology plus linked products.
Final view
The KOSDAQ premium 70-name league is not a “buy the whole KOSDAQ” story. It is a policy event that can compress attention into KOSDAQ names that institutions and passive products can actually own. The current core 30 centers on semis, biotech, batteries, robotics, AI infrastructure and entertainment. The first event-alpha watchlist is narrower: Rainbow Robotics, EO Technics, Jeju Semiconductor, Hana Micron, Dongjin Semichem, ISC, Eugene Technology and Seojin System.
Evidence Ledger
| Item | Evidence |
|---|---|
| Reported 70-name premium league | Seoul Economic Daily report, June 17, 2026. Official list not yet public |
| Existing KOSDAQ Global criteria | KRX KOSDAQ Global Segment rules |
| KOSDAQ Global current inclusion | KRX KOSDAQ Global constituent API, checked June 17, 2026 |
| Price and foreign-ownership baseline | Thesis OS local DB, June 17, 2026 |
| Feature-store baseline | Thesis OS feature store, June 16, 2026 |
| Key limitation | [Blocked] Official 70-name list, final index methodology, cap rule and linked ETF AUM are not yet confirmed |