Yankey Engineering Co (6691) Fair Value & Analysis
Industrials · TW · Market cap 87.6B TWD
Fair value as of: Jul 23, 2026
From 26 valuation models · updated 17 days ago
Share price +2.8% over the past month.
A solid business, but screening 48% overvalued on our models.
What matters now
- The model range is unusually wide (278.91 TWD to 938.00 TWD). The outcome hinges heavily on assumptions, so read the point estimate with caution.
- Solid but not exceptional quality (55/100) and above fair value, neither a clear bargain nor a standout compounder.
Price vs Fair Value (5 years)
White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Jul 23, 2026.
How to read this chart
60‑month range 51.08 TWD – 797.00 TWD · fair‑value band 278.91 TWD – 938.00 TWD · the 735.00 TWD price screens above the 380.13 TWD fair value. Dashed = 300-day average. As of Jul 23, 2026.
Analysis
Yankey Engineering Co (6691) currently trades at 735.00 TWD, while our model-based Fair Value estimate is 380.13 TWD, implying the stock looks roughly 48.3% overvalued today. The Quality Score stands at 55/100 (solid quality), in the Industrials sector. Bear case: priced above our estimate, the market already discounts strong expectations. Bull case: above-average quality can justify a premium, the entry price still matters most (evidence: high).
Over the trailing twelve months, Yankey Engineering Co generated revenue of 25.4B TWD at a net margin of 12.8%. Revenue grew 76.8% year over year. It earns a return on equity of 58.2%. The balance sheet holds a net cash position of 4.9B TWD. Fundamentals as of Jul 23, 2026
Our scenario range runs from 278.91 TWD (bear case) to 938.00 TWD (bull case); at 735.00 TWD, the current price sits within that range. Bear and bull are the same models run on conservative and optimistic assumptions (margins, growth, valuation multiples), so a plausible valuation range, not a price target. The share trades near its 52-week high and 116% above its 52-week low, currently above its 200-day average. For context, the median of 10 Industrials peers we cover trades at -45% fair-value upside, at -48%, 6691 screens richer than that median.
Fair Value models
Each model estimates fair value its own way; the Fair Value above is the evidence-weighted blend. Evidence (0–100) measures how completely this model’s inputs are available: well-fed models carry more weight in the blend. The spread across models is intentional, each one stresses a different value driver; dividend models, for instance, come out structurally low when payout is small.
All 26 models by family
Widest divergence: Growth Earnings (881.96 TWD) versus Asset-Based (42.18 TWD). Highest evidence: Growth DCF (80).
Key figures & financial health
More key figures
Figures from reported company fundamentals · as of Jul 23, 2026. TTM = trailing twelve months.
Quality Score breakdown
Of which business quality 56 · Market factors (momentum, volatility) 77
Non-valuation factor families (profitability, growth, cashflow, financial strength, momentum …), each academically grounded. Valuation itself sits in the Fair Value and is deliberately excluded here to avoid double-counting.
About the company
Yankey Engineering Co., Ltd. offers engineering services in Taiwan, China, and Thailand. The company designs and installs clean room systems, refrigeration and air conditioning systems, and ice-making systems; and sells materials for these systems.
Full company description
Yankey Engineering Co., Ltd. offers engineering services in Taiwan, China, and Thailand. The company designs and installs clean room systems, refrigeration and air conditioning systems, and ice-making systems; and sells materials for these systems. It also provides mechanical, electrical, and plumbing turnkey services for commercial office buildings; and high and low voltage transmission system installation, fire protection system, process pipeline system, water supply and drainage system, process exhaust system, and CCTV and security public address system, as well as green energy technology services. Yankey Engineering Co., Ltd. was founded in 1980 and is headquartered in New Taipei City, Taiwan.
Company description, as reported by the company or data provider.
Revenue & earnings trend
FY2021 – FY2025 · reported fiscal years
Yankey Engineering Co reported revenue of 22.4B TWD in FY2025 versus 10.7B TWD in FY2021, a compound +20.3%/yr. Reported net income was 3.0B TWD in FY2025, compounding +32.9%/yr from FY2021.
6691 screens 48% overvalued. Compare with Larsen & Toubro Limited →
Peer Group
Engineering & Construction · 837 stocks
How this stock ranks against its industry: the green marker is this stock, the band is the typical 25–75% peer range, and the tick is the median.
Valuation Multiples vs Engineering & Construction median · lower = cheaper
Snowflake
Five quick dimensions, each 0 to 100: VALUE (fair-value potential), FUTURE (revenue growth), PAST (return on equity), HEALTH (low debt), DIVIDEND (yield). Green = this stock, grey = typical sector peer.
VALUE 0: the price sits above our fair-value range.
Values & ESG
Does this company touch areas you may want to avoid? The classification is inferred from sector and industry.
ESG scores are not available for this stock yet. Values and ESG data are contextual and can differ between providers.
Similar stocks
10 more Engineering & Construction stocks, each showing price versus our Fair Value estimate (as of Jul 23, 2026).
| Stock | Price | Fair Value | vs Fair Value |
|---|---|---|---|
| Larsen & Toubro Limited LT | ₹3,815 | ₹1,994 | -48% |
| Samsung C&T Corporation 028260 | 346,000 KRW | 268,779 KRW | -22% |
| Hyundai Engineering & Construction Co 000720 | 99,000 KRW | 63,993 KRW | -35% |
| United Integrated Services Co 2404 | 1,250 TWD | 925.62 TWD | -26% |
| Samsung E&A Co 028050 | 42,550 KRW | 44,840 KRW | +5% |
| Rail Vikas Nigam Limited RVNL | ₹232.67 | ₹61.46 | -74% |
| Daewoo Engineering & Construction Co 047040 | 16,240 KRW | 6,507 KRW | -60% |
| NBCC (India) Limited NBCC | ₹96.32 | ₹48.22 | -50% |
| Cemindia Projects Limited CEMPRO | ₹1,330 | ₹730.69 | -45% |
| KEPCO Engineering & Construction Company 052690 | 92,700 KRW | 20,172 KRW | -78% |
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How we calculate Fair Value
Each company is valued through a stack of independent intrinsic-value models (DCF variants, residual-income, multiples and more), blended into one family-balanced consensus and weighted by how much trustworthy data backs it. A separate quality layer scores the fundamentals. Every input is real reported data, nothing guessed.
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