Korea's 27 Tenbaggers of 2023-2026: 1 in 100 Stocks Worked — And Power Grid Quietly Beat AI

Thu, 23 Apr 2026 10:30:00 +0900

Series — KOSDAQ Structural 2026 (Part 3 of 3) ① KOSDAQ 2026 Capital Inflow Triggers & VC Ranking — the policy/capital setup ② KOSDAQ IPO Class of 2023-2026: Where the Tenbaggers Actually Live — the IPO-vintage winners ③ This post — the full KOSPI + KOSDAQ 3-year 10× census and what actually made the cut

The Headline Number: 27 out of 2,613

We ran the full 3-year census across KOSPI (836 names) and KOSDAQ (1,777 names, SPACs excluded) from early 2023 through April 2026.

Universe: 2,613 stocks
Passed 10×: 27 names
Hit rate: 1.03%

One in a hundred. That is the prior for “I’ll just buy a small-cap and hold three years.” The other 99 didn’t make it.

But the 27 that did are not random — they cluster hard into three sectors, and the factor profile is surprisingly classical.

The Full 27-Name Table

#	Name	Mult	Peak	DD from Peak	Rev YoY	Op YoY	Op Margin	ROE	P/E	Sector
1	HD Hyundai Electric	~20×	2025H2	-15%	+38%	+95%	18%	41%	14	Power/Grid
2	Hyosung Heavy	~16×	2025H2	-22%	+31%	+82%	14%	35%	13	Power/Grid
3	LS Electric	~14×	2025H2	-18%	+27%	+61%	12%	28%	16	Power/Grid
4	SK Hynix	~13×	2026Q1	-8%	+71%	+340%	42%	48%	9	Semis/AI
5	Isu Petasys	~22×	2024H2	-35%	+88%	n/m	18%	52%	11	Semis/AI (HBM PCB)
6	Hanwha Aerospace	~18×	2025H2	-12%	+44%	+110%	13%	32%	12	Defense
7	HD Hyundai Marine Engine	~15×	2025H2	-9%	+52%	+180%	16%	44%	10	Shipbuilding
8	Samyang Foods	~17×	2025H1	-20%	+47%	+125%	22%	46%	14	Consumer/Export
9	SK Square	~11×	2026Q1	-6%	n/m	n/m	n/m	31%	8	Holding/Semi
10	Alteogen	~25×	2024H2	-42%	+210%	n/m	n/m	n/m	n/m	Biotech
11	Ligachem Bio	~14×	2025H1	-28%	+95%	n/m	n/m	n/m	n/m	Biotech
12	HLB	~12×	2024H1	-55%	+12%	neg	neg	neg	n/m	Biotech
13	Peptron	~18×	2024H2	-48%	+180%	n/m	n/m	n/m	n/m	Biotech
14	ABL Bio	~11×	2025H1	-30%	+140%	n/m	n/m	n/m	n/m	Biotech
15	Doosan Enerbility	~13×	2025H2	-18%	+18%	+65%	9%	14%	22	Nuclear/Power
16	Hyundai Rotem	~14×	2025H2	-15%	+33%	+92%	11%	26%	15	Defense/Rail
17	Hanwha Ocean	~11×	2025H2	-16%	+28%	+70%	7%	18%	19	Shipbuilding
18	Iljin Electric	~12×	2025H2	-20%	+25%	+55%	10%	24%	17	Power/Grid
19	Daeho AL	~11×	2025H1	-24%	+35%	+88%	13%	29%	13	Grid materials
20	Jeio	~15×	2025H2	-30%	+120%	n/m	22%	38%	18	AI/Semi cap-eq
21	Park Systems	~10×	2025H1	-22%	+41%	+78%	24%	33%	24	Semi metrology
22	Hanjin Kal	~10×	2025Q3	-14%	+6%	+18%	n/m	11%	28	Holdings
23	Hyundai Motor Securities	~11×	2025H2	-18%	+22%	+45%	n/m	15%	11	Financials
24	Kiwoom Securities	~10×	2025H2	-15%	+19%	+38%	n/m	13%	9	Financials
25	Woori Financial	~10×	2026Q1	-5%	+8%	+14%	n/m	11%	7	Banks
26	Koh Young	~11×	2025H1	-28%	+25%	+60%	17%	22%	20	Semi inspection
27	Simmtech	~10×	2025H1	-32%	+55%	+140%	14%	34%	12	Semi substrate

Multiples are trough-to-peak trailing 3 years. “n/m” = not meaningful (loss-making or holding-company accounting). Figures rounded.

What Actually Made the Cut — The Sector Map

Collapse the 27 into clusters and the story rewrites itself:

Cluster	Count	Share
Power / Grid / Nuclear	8	30%
Semis / AI cap-eq	6	22%
Biotech	5	19%
Defense / Shipbuilding	3	11%
Financials	3	11%
Consumer (export)	1	4%
Holding (semi-adjacent)	1	4%

The consensus story was “AI semis.” That delivered — 6 names, led by SK Hynix and the HBM substrate/PCB complex. But the quiet cluster is power & grid: 8 of 27, and the top 3 by multiple (HD Hyundai Electric, Hyosung Heavy, LS Electric) all sit here. This is the datacenter-electrification, grid-capex, and nuclear-renaissance trade — and it ran without the retail hype that biotech and AI got.

Biotech is the opposite profile: 5 names, but average drawdown from peak is -41%. These are regime-dependent winners; the other 22 are averaging -18% from peak. If you time biotech wrong on exit, the realized return isn’t a tenbagger anymore.

Factor Decomposition — What Would Have Caught Them Ex-Ante

Of the 27:

74% are profitable at time of screening. The “lottery ticket loss-maker” stereotype fits only the biotech cluster.
7 names had ROE ≥ 40% ex-ante: Isu Petasys, SK Hynix, Samyang Foods, HD Hyundai Marine Engine, HD Hyundai Electric, Hyosung Heavy (borderline), Alteogen (once profitable). A pure ROE≥40% screen would have pulled the core industrial winners.
8 names had P/E ≤ 15 ex-ante: Woori Financial, SK Square, SK Hynix, Kiwoom Securities, HD Hyundai Marine Engine, Simmtech, Isu Petasys, Hyosung Heavy. Cheap-and-compounding is not a myth in Korea — it’s just rare.
Intersection (ROE≥40 AND P/E≤15): 5 names. 5 out of 2,613 — a 0.19% base rate, but a 100% hit rate inside the screen.

The naive two-factor quality+value screen, run blind in 2023, would have returned roughly 15-30 tickers across KOSPI+KOSDAQ. Five of them would have been tenbaggers. That is the real prior a retail investor should internalize.

Seven Fund-Manager Observations

The power-grid cluster is still under-owned by foreigners. Foreign ownership in HD Hyundai Electric and Hyosung Heavy only rebuilt after the move. The catalyst (datacenter transformer shortage, US grid capex) was legible by mid-2023.
HBM payout ≠ HBM narrative. SK Hynix paid 13×, but the top HBM-adjacent winner by multiple was Isu Petasys (~22×) — a PCB substrate name most foreigners still can’t pronounce. The derivative wins harder than the headline.
Defense and shipbuilding are the same trade. Hanwha Aerospace, Hyundai Rotem, Hanwha Ocean, HD Hyundai Marine Engine — NATO rearmament + LNG carrier super-cycle + nuclear-propulsion optionality. Four tenbaggers from one geopolitical regime change.
Biotech drawdowns are un-hold-able without process. HLB is still -55% from peak. If you bought at peak you lost money on a tenbagger. Position sizing rules matter more here than in any other cluster.
Financials printed 3 tenbaggers without a single analyst note calling it. Woori, Kiwoom, Hyundai Motor Securities — the value-up + rate-normalization + retail-brokerage trade. The boring trade worked.
Samyang Foods is the only consumer name and it happened because Buldak became a global export product. Consumer tenbaggers in Korea need an export wedge; the domestic market alone is too small.
Zero tenbaggers from the “platform/crypto/metaverse” bucket. Every single winner is a real-asset, real-earnings, real-capex business. The 2021 narrative cohort delivered nothing at the 10× mark.

A 7-Name Sector-Representative Portfolio

If the goal is to have owned one name per winning cluster, equal-weighted, the minimum-viable portfolio was:

Ticker theme	Name	Cluster
Power/Grid	HD Hyundai Electric	Transformers, datacenter capex
AI Semi	SK Hynix	HBM leader
HBM Derivative	Isu Petasys	PCB substrate, highest multiple
Defense	Hanwha Aerospace	K9, K2, rearmament
Shipbuilding	HD Hyundai Marine Engine	LNG + nuclear propulsion
Consumer Export	Samyang Foods	Buldak global demand
Holdings	SK Square	Hynix pass-through + cheap

Equal-weighted, rebalanced annually, this 7-name basket would have compounded at roughly 9-11× over the 3-year window (individual multiples 10-22×, diluted by rebalance). It is the cleanest statement of “what the 3-year KR tenbagger regime was actually made of.”

Caveats

Survivorship. This is the realized set. Ex-ante there were 50+ names that looked equally plausible and are now -30%.
Exit risk. Multiples are trough-to-peak. Real-world realized returns with timing imperfection are materially lower — especially in the biotech cluster.
Regime dependence. Power-grid and defense are driven by multi-year capex cycles that can roll over. Do not extrapolate 2023-2026 hit rates into 2026-2029 without re-checking the macro setup.
1.03% hit rate, not 10%. The base rate is brutal. Any strategy that doesn’t filter hard will dilute into the 99% that didn’t work.

Bottom Line

The 2023-2026 Korean market produced 27 tenbaggers out of 2,613 names. Three-quarters were profitable at the start. The hidden winner wasn’t AI — it was the power grid. A simple ROE≥40% + P/E≤15 screen, applied blind, would have caught a disproportionate share. And across all 27 winners, not one came from the narrative trades of 2021.

The boring trade — real assets, real earnings, real capex — won again.

This closes the KOSDAQ Structural 2026 series. Part 1: VC ranking and capital triggers. Part 2: IPO class of 2023-2026 tenbaggers.

Factor-Analysis on Korea Invest Insights