ISA ENERGIA BRASIL (ISAE3) fair value: what the stock is really worth
We calculate from audited financials what ISA ENERGIA BRASIL is really worth. The fair value tells you whether the price is too high or too low, the quality score (0 to 100) how solid the business behind it is. 26 models, 37 quality factors, updated daily, free.
Compare price with fair valuebelow fair value = cheap, above = expensive
Check the quality50 and up solid, 75 and up strong
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Utilities · BR · Market cap R$22.2B (≈ $4.3B)
At a glance
IEISA ENERGIA BRASILISAE3 · SA
PriceR$33.66
Fair ValueR$56.59
Upside+68.1%
Quality47/100
Below-average quality, trading 41% below our fair value of R$56.59.
As of Aug 21, 2026, the fair value of ISA ENERGIA BRASIL is R$56.59 per share against a price of R$33.66, so the fair value sits 68% above the price. A model estimate from reported figures, not an analyst target.
!Expensive Growth (revenue 3y +20.0 %/yr)
✓Highly profitable · 24.7% net margin
!Moderate debt · negative free cash flow
·5.50% dividend yield
✓Ranks above peers (12/14)
✓Wide moat 70/100
!Weak on future: 21 out of 100
Evidence: HighRange R$42.44 to R$70.74
Fair value as of: Aug 21, 2026
From 17 valuation models · updated 21 days ago
Share price +6.3% over the past month.
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69 individual criteria per stock, every one traceable See the method →
What matters now
The price is below even our cautious bear case (R$42.44). The market is more pessimistic than our downside scenario.
Solid quality (47/100) at a price below fair value, the discount is the argument here, not the business quality.
Price vs Fair Value (5 years)
White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Aug 21, 2026.
How to read this chart
60‑month range R$21.94 – R$35.25 · fair‑value band R$42.44 – R$70.74 · the R$33.66 price screens below the R$56.59 fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). Dashed = 300-day average. As of Aug 21, 2026.
ISA ENERGIA BRASIL (ISAE3) currently trades at R$33.66, while our model-based Fair Value estimate is R$56.59, implying the stock looks roughly 40.5% undervalued today. The Quality Score stands at 47/100 (below-average quality), in the Utilities sector. Bull case: the DCF Models group reads highest at a median of R$98.93 per share, and 15 of the 17 models we run sit above the R$33.66 price. Bear case: the Asset-Based group reads lowest at R$21.51, and 2 of the 17 models stay below the price. Evidence for this calculation is high.
Over the trailing twelve months, ISA ENERGIA BRASIL generated revenue of R$9.5B at a net margin of 24.7%. Revenue grew 4.1% year over year. It earns a return on equity of 11.3%. Net debt stands at R$14.6B. Fundamentals as of Aug 21, 2026
Scenario range: R$42.44 (bear) to R$70.74 (bull), the price of R$33.66 sits below it. Bear and bull are the same models on cautious and optimistic assumptions, a range, not a price target. The share trades about 5% below its 52-week high and 20% above its 52-week low, currently above its 200-day average. For context, the median of 10 Utilities peers we cover trades at −51% fair-value upside, at 68%, ISAE3 screens cheaper than that median.
Fair Value models
Based on fiscal year 2025 figures (about 8 months old). Earnings retained since then (R$1.19 per share) are deliberately not added.
Each model values the company its own way; the fair value above is the evidence-weighted blend. Evidence (0 to 100) shows how complete a model's inputs are. How we calculate →
ModelBear ⓘ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
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Key figures & financial health
P/E ratio9.5as of Jun 8, 2026
P/S ratio2.47P/E × margin
EPS (TTM)R$3.56price ÷ EPS = P/E 9.5
Dividend yield5.5%payout 52.0%
Net margin26.0%FY2025
Return on equity11.3%TTM
More key figures
Profitability
Return on assets (EBIT)11.2%avg 5y
Operating margin43.9%TTM
Growth
Revenue (TTM)R$9.5BTTM
Revenue growth (YoY)+4.1%3y avg +20.0%
EPS growth (YoY)−14.6%
Balance sheet & cash flow
Free cash flow−R$1.3BFY2025
Net debtR$14.6BFY2025
Figures from reported company fundamentals · as of Aug 21, 2026. TTM = trailing twelve months.
Quality Score breakdown
Overall quality47/100
Of which business quality 41
· Market factors (momentum, volatility) 64
Profitability42
Margins and returns on capital today
Quality Growth39
Are margins and returns improving?
Cashflow0
Earnings quality: real cash, not paper profit
Fin. Strength43
Balance sheet, leverage, solvency risk
Investment62
Disciplined investing over empire-building
Low Volatility88
Calm price path (market factor)
Momentum49
Price trend over the last 3–12 months (market factor)
52W Momentum64
Distance to the 52-week high (market factor)
Net Issuance82
Buybacks instead of dilution
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.
All values are scores from 0 to 100 (100 = best against fixed, research-based bands), not percentages. The three market factors (momentum, 52-week proximity, low volatility) are displayed but carry zero weight in the headline number: market sentiment is not a business property.
About the company
ISA Energía Brasil S.A. engages in the electric power transmission business in Brazil. As of December 31, 2025, it had a total installed transformation capacity of 84,910 MVA together with transmission lines of 23,000 kilometers. It operates in the states of Bahia, Espírito Santo, Minas Gerais, Rio de Janeiro, and São Paulo. ISA Energía Brasil S.A.
Full company description
ISA Energía Brasil S.A. engages in the electric power transmission business in Brazil. As of December 31, 2025, it had a total installed transformation capacity of 84,910 MVA together with transmission lines of 23,000 kilometers. It operates in the states of Bahia, Espírito Santo, Minas Gerais, Rio de Janeiro, and São Paulo. ISA Energía Brasil S.A. was incorporated in 1999 and is headquartered in São Paulo, Brazil.
Company description, as reported by the company or data provider.
Revenue & earnings trend
FY2021 – FY2025 · reported fiscal years
ISA ENERGIA BRASIL reported revenue of R$9.4B in FY2025 versus R$5.5B in FY2021, a compound +14.2%/yr. Reported net income was R$2.4B in FY2025, compounding −5.1%/yr from FY2021.
Growth Quality 62/100
The company is growing, but growth may require heavy reinvestment or weak cash conversion.
Latest Revenue (FY 2025)
R$9.4B
Latest YoY
+18.1%
Avg. revenue growth/yr (3Y) ⓘ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.
+20.0%
Value creation/yr (5Y, in BRL) ⓘEarnings growth per share (CAGR 5 years) plus dividend yield: value created per share and year. Measured in BRL: 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.
+1.4%
Earnings growth per share plus dividend yield: the value created per share and year.
Earnings growth per share−4.1%
Dividend yield5.5%
Operating margin (EBIT) ⓘ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.70.8% (2021) → 43.9% (2025) · falling
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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.
This stockSector peers
VALUE100· sector 17
FUTURE21· sector 0
PAST45· sector 29
HEALTH64· sector 70
DIVIDEND100· sector 51
Values & ESG
Does this company touch areas you may want to avoid? The classification is inferred from sector and industry.
None of the checked exposures detected
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Is ISA ENERGIA BRASIL (ISAE3) overvalued or undervalued?
As of Aug 21, 2026, our model estimates a fair value of R$56.59 versus a price of R$33.66, about +68% upside (undervalued).
What is the fair value of ISAE3?
Our model-based fair value for ISA ENERGIA BRASIL is R$56.59 (as of Aug 21, 2026), built from audited fundamentals. The current price: R$33.66.
What is the quality score of ISAE3?
ISA ENERGIA BRASIL has a Quality Score of 47/100. 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 ISA ENERGIA BRASIL (ISAE3)?
Our model-based price target is the fair value of R$56.59 (as of Aug 21, 2026) from 17 valuation models. Cautious scenario R$42.44, optimistic scenario R$70.74. It is a calculation from audited fundamentals, not an analyst target.
What is the ISA ENERGIA BRASIL stock forecast for 2026?
Our models put fair value at R$56.59, about +68% upside versus a price of R$33.66 (undervalued). Cautious scenario R$42.44, optimistic scenario R$70.74. The calculation is refreshed regularly with new filings.
What is the revenue of ISA ENERGIA BRASIL (ISAE3)?
ISA ENERGIA BRASIL reported trailing-twelve-month revenue of about R$9.5B (latest available figure, as of Aug 21, 2026).
What is the net profit margin of ISAE3?
The net profit margin of ISA ENERGIA BRASIL is about 24.7%, meaning it keeps roughly 24.7% of revenue as net income. Based on the latest reported figures.
Does ISA ENERGIA BRASIL pay a dividend?
ISA ENERGIA BRASIL currently shows a dividend yield of about 5.50% relative to its recent price (as of Aug 21, 2026).
What is the intrinsic value of ISA ENERGIA BRASIL (ISAE3)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For ISA ENERGIA BRASIL it is R$56.59 per share (as of Aug 21, 2026), against a price of R$33.66. It is the blended result of 17 valuation models (cash flow, earnings, asset, dividend).
Is ISA ENERGIA BRASIL stock overvalued or undervalued in 2026?
As of Aug 21, 2026, ISAE3 trades below its calculated fair value: price R$33.66, fair value R$56.59, a gap of about +68% (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 ISAE3?
No. The price is what the market pays today (R$33.66); the fair value is what the company's own numbers justify (R$56.59). For ISA ENERGIA BRASIL the two are R$22.93 per share apart. That gap is exactly why we show both numbers side by side.
How much is ISA ENERGIA BRASIL worth?
The market values ISA ENERGIA BRASIL at about R$22.2B (market capitalisation, as of Aug 21, 2026). Per share that is R$33.66; our models calculate a fair value of R$56.59 per share.
What do the bullish and bearish scenarios say about ISAE3?
Our models span a range for ISA ENERGIA BRASIL: cautious scenario R$42.44, base R$56.59, optimistic R$70.74 per share (as of Aug 21, 2026, price R$33.66). The range comes from different growth and margin assumptions, not from analyst opinions.
What is the P/E ratio of ISAE3?
ISA ENERGIA BRASIL trades at a price-to-earnings ratio of 9.5 (as of Aug 21, 2026). A P/E on its own says little: it compares the price with ONE year of profit, while our fair value of R$56.59 is built from several models across several years. Other multiples: PEG 1.8, P/B 1.0, P/S 2.2, EV/EBITDA 9.7.
What is the PEG ratio of ISAE3?
The PEG ratio of ISA ENERGIA BRASIL is 1.75 (P/E divided by earnings growth, as of Aug 21, 2026). That is above 1, so the growth is already paid for in the price.
How solid is the balance sheet of ISA ENERGIA BRASIL (ISAE3)?
Balance-sheet figures for ISA ENERGIA BRASIL (as of Aug 21, 2026): return on equity 11.3%, debt of 0.73 per unit of equity. They feed the Quality Score of 47/100, which measures business quality independently of the share price.
How far is ISAE3 from its 52-week high?
ISA ENERGIA BRASIL trades at R$33.66, about 5% below its 52-week high of R$35.25 and 20% above the low of R$28.12 (as of Aug 21, 2026). Distance from the high says nothing about value: that is what the fair value of R$56.59 is for.
Which stocks are comparable to ISA ENERGIA BRASIL?
From the same area (Utilities) we also value Constellation Energy Corporation, Vistra Corp, Adani Power Limited, CGN Power Co, 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 ISA ENERGIA BRASIL stock attractive at the current price?
The data as of Aug 21, 2026: price R$33.66, calculated fair value R$56.59 (+68%), Quality Score 47/100, from 17 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 ISAE3 calculated?
We run ISA ENERGIA BRASIL through 17 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 R$56.59, 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 32.6 % above its aggregate fair value. ISA ENERGIA BRASIL currently trades 68 % 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 <a href="/is-it-worth-investing-now/">is it worth investing now</a>.
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