Largest Companies in Portugal by Market Cap (October 2026)

The 23 listed companies ATLAS covers in Portugal range from small caps to national champions. These are the 25 largest by market value, converted to US dollars so they can be compared. The three biggest (EDP - Energias de Portugal, Galp Energia SGPS, and Banco Comercial Portugues) account for 63% of the combined market value of the whole list.

Data as of Oct 27, 2026. Prices and ratios are the latest stored close; this page refreshes at least every 6 hours.

#	Company	Price	Market cap	1 day	vs fair value	Chance up (1 month)
1	EDP.LSEDP - Energias de Portugal	€4.76	$22.8B	+1.4%	+21%	53%
2	GALP.LSGalp Energia SGPS	€20.47	$18.4B	-10.8%	+57%	51%
3	BCP.LSBanco Comercial Portugues	€1.07	$18.3B	+1.2%	+41%	52%
4	JMT.LSJeronimo Martins SGPS	€18.04	$12.3B	-1.8%	-54%	52%
5	SON.LSSonae SGPS	€2.14	$4.6B	-0.2%	-65%	54%
6	NOS.LSNOS S.G.P.S.	€5.12	$3.0B	-1.0%	-50%	53%
7	RENE.LSREN - Redes Energéticas Nacionais SGPS	€3.55	$2.7B	+0.3%	-45%	56%
8	NVG.LSThe Navigator Company	€2.98	$2.4B	+1.5%	-2%	56%
9	SEM.LSSemapa	€19.50	$1.7B	+2.1%		54%
10	EGL.LSMota-Engil SGPS	€4.62	$1.6B	+2.8%	-56%	51%
11	ALTR.LSAltri SGPS	€4.31	$1.0B	+0.8%	+46%	54%
12	COR.LSCorticeira Amorim	€6.88	$999M	-0.3%	-40%	55%
13	CTT.LSCTT Correios de Portugal	€5.50	$820M	+1.7%	-41%	53%
14	IBS.LSIbersol SGPS	€10.28	$447M	-0.2%	-17%	53%
15	TDSA.LSTeixeira Duarte	€0.431	$212M	+1.4%		50%

Fair value gap: a negative number means the price is below ATLAS fair value. "Chance up" is the probability of a higher close in 21 trading sessions (about a month) in ATLAS's calibrated model.

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The top 10 in a sentence

EDP - Energias de Portugal (EDP.LS) has a market value of $22.8B. It trades 21% above ATLAS fair value. ATLAS gives it a 53% chance of closing higher in a month.
Galp Energia SGPS (GALP.LS) has a market value of $18.4B. It trades 57% above ATLAS fair value. ATLAS gives it a 51% chance of closing higher in a month.
Banco Comercial Portugues (BCP.LS) has a market value of $18.3B. It trades 41% above ATLAS fair value. ATLAS gives it a 52% chance of closing higher in a month.
Jeronimo Martins SGPS (JMT.LS) has a market value of $12.3B. ATLAS puts it 54% below its fair value. ATLAS gives it a 52% chance of closing higher in a month.
Sonae SGPS (SON.LS) has a market value of $4.6B. ATLAS puts it 65% below its fair value. ATLAS gives it a 54% chance of closing higher in a month.
NOS S.G.P.S. (NOS.LS) has a market value of $3.0B. ATLAS puts it 50% below its fair value. ATLAS gives it a 53% chance of closing higher in a month.
REN - Redes Energéticas Nacionais SGPS (RENE.LS) has a market value of $2.7B. ATLAS puts it 45% below its fair value. ATLAS gives it a 56% chance of closing higher in a month.
The Navigator Company (NVG.LS) has a market value of $2.4B. ATLAS puts it close to its fair value. ATLAS gives it a 56% chance of closing higher in a month.
Semapa (SEM.LS) has a market value of $1.7B. ATLAS gives it a 54% chance of closing higher in a month.
Mota-Engil SGPS (EGL.LS) has a market value of $1.6B. ATLAS puts it 56% below its fair value. ATLAS gives it a 51% chance of closing higher in a month.

How the largest companies in Portugal are ranked

Market value is price times shares outstanding, stored in US dollars so companies quoted in different currencies compare. Where market value and share count do not reconcile (several share classes, dual listings), the company is left out of the size ranking rather than shown with a wrong number.

There are no quality filters here: this is size, not merit. The fair value gap and the one-month probability are shown for context.

Limits: market values move every day with prices and exchange rates, and the figure shown is the latest ATLAS has stored. A large company is not automatically a safe or cheap one. This is information, not investment advice.

Frequently asked questions

What are the largest companies in Portugal?

In October 2026, the three largest listed companies in Portugal by market value are EDP - Energias de Portugal, Galp Energia SGPS, and Banco Comercial Portugues. The three together are worth $59.5B.

How concentrated is the stock market in Portugal?

The three largest companies account for 63% of the combined market value of the 23 companies on the list, a quick measure of concentration.

Is the biggest company the best investment?

No. Size says how much the market values a company today, not whether it is cheap or likely to rise. Compare the fair value gap and the ratios on each company page.

How is market value measured here?

Price times shares outstanding, in US dollars at the latest exchange rate ATLAS has stored. Companies whose share count does not reconcile with their stored value are left out.

How often is this list updated?

Prices and values come from ATLAS's stored data, refreshed every day, and this page is rebuilt at least every 6 hours.

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Largest companies: other countries

Information only, not investment advice. ATLAS estimates come from statistical models using public data; they can be wrong, and past results do not guarantee future ones. Disclaimer