Both stocks run through our valuation models. Here is how Sia Engineering Co (S59) and Aena (AENA) compare, as of Aug 19, 2026.
As of Aug 19, 2026, Fair Value Calculator sees Aena as the more attractively valued of the two: Sia Engineering Co trades at S$3.23 versus a fair value of S$1.77 (-45%), while Aena trades at €26.20 versus €26.90 (+3%).
Sia Engineering Co
S59.SG · SGD · Industrials
-45%
upside to fair value
overvalued
PriceS$3.23
Fair ValueS$1.77
Quality57/100
Aena
AENA.MC · EUR · Industrials
+3%
upside to fair value
fairly valued
Price€26.20
Fair Value€26.90
Quality69/100
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Head-to-head numbers
Green value = the better side for that row (for valuation multiples: lower = cheaper).
Sia Engineering CoAena
Valuation
21.5×P/E (TTM)18.2×
2.14×P/S (TTM)7.06×
1.73×P/B4.95×
50.3×EV/EBITDA13.1×
2.59×PEG3.02×
3.2%Dividend yield4.2%
S$0.11Dividend per share€1.09
Profitability
12%Net margin34%
3%Operating margin31%
10%Return on equity24%
1%Return on assets10%
Growth
-1%Revenue growth (YoY)12%
21.4%Avg. growth/yr (3Y)14.4%
26.3%Avg. growth/yr (5Y)23.5%
Balance & size
0.00×Debt / equity0.53×
$3BMarket cap$46B
expensiveGrowth qualityhealthy
Aena leads: 6 to 8 metric wins.
Dash = not meaningfully computable, for example with negative equity.
Quality in detail
The quality score, broken down into the same factor families as on the stock page, 0 to 100 per family.
Sia Engineering Coof which business quality 55 · market factors 54Aenaof which business quality 68 · market factors 59
ProfitabilityMargins and returns on capital today
45
63
Quality GrowthAre margins and returns improving?
63
50
CashflowEarnings quality: real cash, not paper profit
InvestmentDisciplined investing over empire-building
87
56
Low VolatilityCalm price path (market factor)
93
81
MomentumPrice trend over the last 3–12 months (market factor)
40
46
52W MomentumDistance to the 52-week high (market factor)
33
58
Net IssuanceBuybacks instead of dilution
82
82
What the models say
The median fair value (base case) per model family, each in the currency of its trading venue. Green = above the current price, red = below.
Sia Engineering Co
DCF ModelsS$2.49
Earnings-BasedS$0.64
Dividend DiscountS$1.35
MultiplesS$1.86
Asset-BasedS$1.05
Economic ProfitS$0.89
Growth EarningsS$2.60
16 of 16 models see the stock below the current price.
Aena
DCF Models€28.85
Earnings-Based€14.12
Dividend Discount€17.57
Multiples€27.07
Asset-Based€4.11
Growth DCF€19.22
Economic Profit€14.75
Growth Earnings€24.15
15 of 26 models see the stock below the current price.
Scenario ranges
From our cautious bear case to the optimistic bull case. The white tick is the current price: left of fair value means room to run.
Sia Engineering Co
Bear S$1.40Fair Value S$1.77Bull S$3.01
S$3.23 = current price (white tick)
Aena
Bear €15.45Fair Value €26.90Bull €36.38
€26.20 = current price (white tick)
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Ranked within their sector
Where each stock sits within its sector peer group. Band = middle 50% of peers, tick = median, dot = this stock.
Sia Engineering Co · Industrials
Quality score57 · above median
Fair value upside-45% · below median
Aena · Industrials
Quality score69 · Top 25%
Fair value upside+3% · above median
Bottom line
As of Aug 19, 2026, Fair Value Calculator sees Aena as the more attractively valued of the two: Sia Engineering Co trades at S$3.23 versus a fair value of S$1.77 (-45%), while Aena trades at €26.20 versus €26.90 (+3%).
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A model-based valuation snapshot from 21 models. Values change with price and fundamentals; the date shown above applies.
