Donga Geologic (028100) fair value: what the stock is really worth
As of Sep 23, 2026: fair value of Donga Geologic KRW 32,668, price KRW 19,700, upside +65.8%, quality 65 out of 100. Calculated from audited financials with 26 valuation models and 37 quality factors, updated daily.
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Price vs Fair Value
White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Sep 24, 2026.
How to read this chart
60‑month range 10,209 KRW – 19,940 KRW · fair‑value band 24,501 KRW – 40,835 KRW · the 19,700 KRW price screens below the 32,668 KRW fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). Dashed = 300-day average. As of Sep 24, 2026.
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Dong-Ah Geological Engineering Company Ltd. operates as a construction company in South Korea and internationally. The company undertakes tunnel construction, ground improvement, and engineering works. Dong-Ah Geological Engineering Company Ltd. was founded in 1971 and is headquartered in Busan, South Korea.
Stock analysis
Donga Geologic (028100) currently trades at 19,700 KRW, while our model-based Fair Value estimate is 32,668 KRW, implying the stock looks roughly 39.7% undervalued today.
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Valuation
Bull case: the DCF Models group reads highest at a median of 51,944 KRW per share, and 19 of the 23 models we run sit above the 19,700 KRW price.
Bear case: the Earnings-Based group reads lowest at 9,163 KRW, and 4 of the 23 models stay below the price. Evidence for this calculation is medium.
Scenario range: 24,501 KRW (bear) to 40,835 KRW (bull), the price of 19,700 KRW sits below it. Bear and bull are the same models on cautious and optimistic assumptions, a range, not a price target.
Quality & growth
The Quality Score stands at 65/100 (solid quality), in the Industrials sector.
Healthy Growth: Revenue growth appears healthy and is supported by profitability and cash-flow quality.
Donga Geologic reported revenue of 468B KRW in FY2025 versus 289B KRW in FY2021, a compound +12.7%/yr. Reported net income was 18.7B KRW in FY2025, compounding +41.6%/yr from FY2021.
Key figures
Market cap 251B KRW (≈ $184M) · P/S ratio 0.35 · Dividend yield 3.0% · Net margin 4.0% · Return on equity 8.9% · Return on assets (EBIT) 0.3% · Operating margin 4.0% · Revenue (TTM) 488B KRW.
Competitive moat
Our AI-assisted moat analysis scores the competitive advantage at 42 out of 100 (low confidence).
What moves the price
The share trades about 1% below its 52-week high and 51% above its 52-week low, currently above its 200-day average.
For context, the median of 10 Industrials peers we cover trades at −31% fair-value upside, at 66%, 028100 screens cheaper than that median.
Fair Value models
Bear 24,501 KRWFair Value 32,668 KRWBull 40,835 KRW
Model ⓘEach model values the company its own way (discounted cash flow, earnings, assets, dividends). The fair value above is their evidence-weighted blend, not the output of a single model.Bear ⓘBear = the cautious scenario: the same model computed with conservative anchors (lower growth, margins and valuation multiples). Together with Bull it frames a plausible valuation range, not a price target.BaseBull ⓘBull = the optimistic scenario: the same model computed with favourable anchors (higher growth, margins and valuation multiples). Together with Bear it frames a plausible valuation range, not a price target.Evidence ⓘEvidence = how well-backed THIS model's estimate is for this stock (0–100): how complete and reliable its input data are, and how well the model fits the company. The final Fair Value is an evidence-weighted blend, so better-evidenced models count more. Green ≥70, amber 50–69, grey below 50.
Growth Quality ⓘGrowth is valuable only when reinvestment earns attractive returns (Aswath Damodaran): sustainable growth depends on return on capital, reinvestment and efficiency. Basis: total company revenue over the periods shown on the cards (3Y/5Y/all years), not per share, so a merger can show up as a growth jump; per-share earnings growth is in the value-creation card.77/100
Revenue growth appears healthy and is supported by profitability and cash-flow quality.
Revenue growth 1 year
+18.9%
Revenue growth 3 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+20.7%
Revenue growth 5 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+8.3%
Start year 2020 (pandemic). Over 10 years: +4.7% a year
Revenue growth 14 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+4.5%
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What shareholders gained per year (last 5 years), in KRW (mathematically smoothed) ⓘWhat the business itself delivers per year: earnings growth per share plus the dividend yield. This is what you get IF the market keeps valuing the stock the same way: it contains no assumption about the market changing its mind. Computed per share, so buybacks count and a merger does not pass as growth. For a company that pays no dividend it is pure earnings growth per share. Period: earnings growth per share as CAGR over the last 5 reported fiscal years (annual statements), plus the current dividend yield. The start value is the median of the three years around the start, so a single crisis year (a pandemic or a write-down) does not distort the rate. Smoothed = median of all growth paths between the years of the window (trend line on the logarithm of earnings per share): a single extreme year cannot distort the rate. The reported figure stays in the tooltip. Measured in KRW: this currency has depreciated against the euro and dollar over the long run, so part of the nominal rate is currency erosion that never reaches a EUR/USD investor.
+46.9%
Earnings growth per share plus dividend.
Earnings per share, growth per year+43.9%
Dividend (yield on the price)3.0%
Profit margin 2020 to 2025 ⓘOperating margin then vs now, from reported annual statements. A falling margin after a boom year is the classic peak-earnings signal: the growth rate then leans on an inflated base.1% → 4%
2025 sits 81% above its own trend. The rate follows the median trend of the last 5 years, not that single year.
⚠ Revenue per share shrinking 1.0%/yr over ~6Y (margins eroding too) ⓘStructural-decline marker: revenue PER SHARE has fallen over the last decade (robust median trend, not a single year). Backtested across 2005 to 2017, such businesses trailed the market by about 2.5 percentage points per year. Display only: it does not change the fair value or the quality score.
Growth Forecast
Little optimism in the price
The price assumes less growth than the company has delivered so far.
What the price assumes ⓘThis turns our valuation around: instead of asking what the share is worth, it asks what growth the current price requires. It uses the cash the company keeps after all spending (free cash flow), the same discount rate as our models, five years of growth, then slowing evenly to 2 % a year by year ten. Compared with the analysts' sales forecasts extended to the same five years (at least three analysts, for context only, it does not enter the Fair Value): within 3 percentage points counts as "in line" (amber), below that little optimism (green), above that a lot of optimism (red).
−21.7%
Yearly growth needed for the next five years to justify today's price.
What forecasts expect
n/a
No analyst forecast available.
After inflation (South Korea: IMF forecast 2.1% a year to 2030, 2.1% from 2016 to 2025) that is about −23.3% a year for the price.
Price, fair value, quality and upside side by side.
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Peer Groupⓘ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.Engineering & Construction · 840 stocks
Beats the industry median on 9/10 measures
Overall it ranks above its industry peers.
Valuation
Quality Score65 · Top 25%
Fair Value upside+66% · Top 25%
Profitability
Return on equity (TTM)9% · Above median
Return on assets3% · Above median
Net margin (TTM)4% · Above median
Operating margin (TTM)4% · Below median
Growth and dividend
Revenue growth19% · Above median
Dividend yield (TTM)3.0% · Above median
Balance sheet
Debt / equity0.01× · Lowest 25%
Valuation Multiplesvs Engineering & Construction median · lower = cheaper
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Cite: Fair Value Calculator (2026). "Donga Geologic Fair Value". https://www.fairvalue-calculator.com/stock/028100
Frequently asked questions
Is Donga Geologic (028100) overvalued or undervalued?
As of Sep 24, 2026, our model estimates a fair value of 32,668 KRW versus a price of 19,700 KRW, about +66% upside (undervalued).
What is the fair value of 028100?
Our model-based fair value for Donga Geologic is 32,668 KRW (as of Sep 24, 2026), built from audited fundamentals. The current price: 19,700 KRW.
What is the quality score of 028100?
Donga Geologic has a Quality Score of 65/100. It measures business quality (profitability, growth, cash flow, balance-sheet strength, investment discipline, share issuance). Market factors such as price momentum and volatility do not enter the number; they are shown separately in the detail view.
What is the price target for Donga Geologic (028100)?
Our model-based price target is the fair value of 32,668 KRW (as of Sep 24, 2026) from 23 valuation models. Cautious scenario 24,501 KRW, optimistic scenario 40,835 KRW. It is a calculation from audited fundamentals, not an analyst target.
What is the Donga Geologic stock forecast for 2026?
Our models put fair value at 32,668 KRW, about +66% upside versus a price of 19,700 KRW (undervalued). Cautious scenario 24,501 KRW, optimistic scenario 40,835 KRW. The calculation is refreshed regularly with new filings.
What is the revenue of Donga Geologic (028100)?
Donga Geologic reported trailing-twelve-month revenue of about 488B KRW (latest available figure, as of Sep 24, 2026).
Does Donga Geologic pay a dividend?
Donga Geologic currently shows a dividend yield of about 3.05% relative to its recent price (as of Sep 24, 2026).
What growth is priced into Donga Geologic (028100)?
For today's price to be fair in a discounted-cash-flow model, Donga Geologic would have to grow free cash flow by -21.7 % per year for five years (discount rate 11.6 %, then slowing evenly to 2 % perpetual growth by year ten). Over the last 5 years revenue grew +8.3 % per year. As of Sep 24, 2026.
What discount rate (WACC) does the fair value of 028100 use?
Our models discount Donga Geologic at 11.6 %: a base by market capitalisation (micro), damped by beta 0.22, country premium for South Korea. The same rate applies in all 26 models.
What is a reverse DCF?
A reverse DCF turns the usual calculation around. Instead of deriving a value from assumptions, it takes today's price as given and asks: what free-cash-flow growth would a company have to deliver for exactly this price to be fair? The result is not a forecast but the expectation already priced in. For Donga Geologic that is -21.7 % per year a year over ten years, using the same discount rate (11.6 %) and the same formula as our fair value.
How much growth has Donga Geologic (028100) delivered so far?
Over the past 5 years revenue at Donga Geologic grew +8.3 % a year. The price currently implies -21.7 % per year free-cash-flow growth a year. Comparing the two shows how much confidence is in the price: if it demands more than has been delivered, the business has to accelerate for the maths to work.
How fast is the sector of Donga Geologic (028100) growing?
The median revenue growth in the sector is +4.7 % a year. That is the yardstick for the growth priced into Donga Geologic (-21.7 % per year a year): it shows whether the expectation is within the usual range or beyond it.
What is the free cash flow yield of Donga Geologic (028100)?
The free-cash-flow yield on the price is 19.02 %: that much free cash flow Donga Geologic produces per unit of market value. When it exceeds the discount rate of our models (11.6 %), the business already earns more than its cost of capital demands, and the price needs little additional growth.
What is the intrinsic value of Donga Geologic (028100)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For Donga Geologic it is 32,668 KRW per share (as of Sep 24, 2026), against a price of 19,700 KRW. It is the blended result of 23 valuation models (cash flow, earnings, asset, dividend).
Is Donga Geologic stock overvalued or undervalued in 2026?
As of Sep 24, 2026, 028100 trades below its calculated fair value: price 19,700 KRW, fair value 32,668 KRW, a gap of about +66% (undervalued). The calculation is refreshed with each new quarterly report, so the verdict can change during the year.
Is fair value the same as the market price of 028100?
No. The price is what the market pays today (19,700 KRW); the fair value is what the company's own numbers justify (32,668 KRW). For Donga Geologic the two are 12,968 KRW per share apart. That gap is exactly why we show both numbers side by side.
How much is Donga Geologic worth?
The market values Donga Geologic at about 251B KRW (market capitalisation, as of Sep 24, 2026). Per share that is 19,700 KRW; our models calculate a fair value of 32,668 KRW per share.
What do the bullish and bearish scenarios say about 028100?
Our models span a range for Donga Geologic: cautious scenario 24,501 KRW, base 32,668 KRW, optimistic 40,835 KRW per share (as of Sep 24, 2026, price 19,700 KRW). The range comes from different growth and margin assumptions, not from analyst opinions.
How solid is the balance sheet of Donga Geologic (028100)?
Balance-sheet figures for Donga Geologic (as of Sep 24, 2026): return on equity 8.9%, debt of 0.01 per unit of equity. They feed the Quality Score of 65/100, which measures business quality independently of the share price.
How far is 028100 from its 52-week high?
Donga Geologic trades at 19,700 KRW, about 1% below its 52-week high of 19,940 KRW and 51% above the low of 13,012 KRW (as of Sep 23, 2026). Distance from the high says nothing about value: that is what the fair value of 32,668 KRW is for.
Which stocks are comparable to Donga Geologic?
From the same area (Industrials) we also value Quanta Services, Inc, Vinci SA, Comfort Systems USA, Inc, Larsen & Toubro Limited, among others. Each of them has its own fair-value calculation on this site using the same models, so the comparison is like for like.
Is Donga Geologic stock attractive at the current price?
The data as of Sep 24, 2026: price 19,700 KRW, calculated fair value 32,668 KRW (+66%), Quality Score 65/100, from 23 models. Whether that fits your horizon and risk tolerance is your call. We provide the calculation, not investment advice.
How is the fair value of 028100 calculated?
We run Donga Geologic through 23 models from four families: discounted cash flow, earnings models, asset and balance-sheet models, and dividend models. Every model gets the same audited fundamentals; the result is the weighted average of 32,668 KRW, with the spread shown as a cautious and an optimistic scenario.
Is it still worth investing in stocks now?
The global stock market currently sits 14.0 % above its aggregate fair value. Donga Geologic currently trades 66 % below its own fair value, and the market average says nothing about that. An expensive market is no reason to stay out and no reason to buy everything at once: keep a broad savings plan running, buy single stocks only with money you can do without, and hold part of your money liquid while the market is high. The full picture including sectors is on is it worth investing now.
What is the share price of Donga Geologic (028100)?
The closing price on Sep 23, 2026 was 19,700 KRW. Our model-based fair value is 32,668 KRW, about +66% upside (undervalued). We carry closing prices from our data provider, not a live tick.
What should I pay attention to with Donga Geologic right now?
The price is below even our cautious bear case (24,501 KRW). The market is more pessimistic than our downside scenario. Solid quality (65/100) at a price below fair value, the discount is the argument here, not the business quality.
Key figures of Donga Geologic
How large is the market capitalisation of Donga Geologic (028100)?
The market capitalisation of Donga Geologic is 251B KRW (≈ $184M). The stock-market value of the whole company: share price times number of shares. It is what the market asks for the entire business today.
What is the P/S ratio of Donga Geologic (028100)?
The price-to-sales ratio of Donga Geologic is 0.35 (last twelve months). Price to sales: market value relative to yearly revenue. Useful when profit is thin or distorted.
What is the dividend yield of Donga Geologic (028100)?
The dividend yield of Donga Geologic is 3.0%. Yearly dividend relative to the share price. 3% pays 3 per 100 invested. Below: how much of profit is used for it.
What is the net margin of Donga Geologic (028100)?
The net margin of Donga Geologic is 4.0% (fiscal year 2025). How much of every unit of revenue ends up as profit. 10% means 10 cents of profit per dollar of sales.
What is the return on equity of Donga Geologic (028100)?
The return on equity (ROE) of Donga Geologic is 8.9% (last twelve months). Profit relative to shareholders' equity, how efficiently the company works with its owners' money.
What is the EBIT return on assets of Donga Geologic (028100)?
On an EBIT basis the return on assets of Donga Geologic is 0.3% (avg 5y). Operating profit (EBIT) relative to everything the company owns, as a multi-year average. It describes the business model rather than one good or bad year.
What is the operating margin of Donga Geologic (028100)?
The operating margin of Donga Geologic is 4.0% (last twelve months). Profit from the core business (before interest and taxes) relative to revenue.
How fast is revenue growing at Donga Geologic (028100)?
Revenue at Donga Geologic is growing +19.2% versus a year earlier (3y avg +20.7%). How much revenue grew versus a year earlier (YoY). The 3-year average next to it puts the single year in context.
How fast are earnings growing at Donga Geologic (028100)?
Earnings per share at Donga Geologic are growing +58.0% versus a year earlier. How much earnings per share grew versus a year earlier.
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