Largest Companies in Brazil by Market Cap (October 2026)

The 141 listed companies ATLAS covers in Brazil 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 (Petróleo Brasileiro, Itaú Unibanco, and Vale) account for 35% 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	PETR3.SAPetróleo Brasileiro	R$60.80	$165B	-6.8%	-23%	50%
2	ITUB3.SAItaú Unibanco	R$45.99	$115B	-13.5%	+77%	50%
3	VALE3.SAVale	R$64.38	$56.0B	+4.0%	+27%	52%
4	BPAC11.SABanco BTG Pactual	R$60.00	$52.0B	-24.8%		47%
5	ABEV3.SAAmbev	R$15.37	$50.2B	-7.9%	+8%	52%
6	WEGE3.SAWEG	R$44.53	$41.7B	+4.2%	+44%	51%
7	SANB11.SABanco Santander (Brasil)	R$26.30	$30.0B	-4.5%	+49%	50%
8	BBAS3.SABanco do Brasil	R$17.47	$27.2B	-29.3%	+56%	46%
9	AXIA3.SACentrais Elétricas Brasileiras	R$50.80	$27.1B	-12.4%	+36%	50%
10	SBSP3.SACompanhia de Saneamento Básico do Estado de São Paulo - SABESP	R$25.27	$22.5B	-21.0%	+4%	48%
11	B3SA3.SAB3	R$15.07	$21.9B	-36.3%	-23%	45%
12	SANB3.SABanco Santander (Brasil)	R$13.07	$20.9B	-5.0%	+4%	50%
13	VIVT3.SATelefônica Brasil	R$30.69	$19.6B	-5.4%	-18%	51%
14	RDOR3.SARede D'Or São Luiz	R$35.02	$18.8B	-19.9%	-21%	48%
15	BBSE3.SABB Seguridade Participacoes	R$43.14	$16.0B	-1.2%	-30%	52%
16	EQTL3.SAEquatorial Energia	R$34.84	$12.1B	-28.7%	+16%	47%
17	ENEV3.SAEneva	R$26.67	$12.0B	-15.3%		50%
18	CPFE3.SACPFL Energia	R$42.70	$11.6B	-14.2%	-23%	50%
19	RENT3.SALocaliza Rent a Car	R$31.67	$11.0B	-39.6%	+55%	48%
20	PRIO3.SAPetro Rio	R$71.14	$10.7B	-3.6%	+40%	50%
21	SUZB3.SASuzano	R$47.40	$10.4B	+10.1%	-63%	51%
22	CPLE3.SACompanhia Paranaense de Energia - COPEL	R$15.10	$10.2B	-12.9%	+41%	51%
23	EGIE3.SAEngie Brasil Energia	R$27.50	$8.8B	-10.7%	-18%	51%
24	VBBR3.SAVibra Energia	R$32.21	$8.8B	-10.1%	-39%	50%
25	UGPA3.SAUltrapar Participações	R$35.24	$8.2B	-8.6%	-2%	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

Petróleo Brasileiro (PETR3.SA) has a market value of $165B. ATLAS puts it 23% below its fair value. ATLAS gives it a 50% chance of closing higher in a month.
Itaú Unibanco (ITUB3.SA) has a market value of $115B. It trades 77% above ATLAS fair value. ATLAS gives it a 50% chance of closing higher in a month.
Vale (VALE3.SA) has a market value of $56.0B. It trades 27% above ATLAS fair value. ATLAS gives it a 52% chance of closing higher in a month.
Banco BTG Pactual (BPAC11.SA) has a market value of $52.0B. ATLAS gives it a 47% chance of closing higher in a month.
Ambev (ABEV3.SA) has a market value of $50.2B. It trades 8% above ATLAS fair value. ATLAS gives it a 52% chance of closing higher in a month.
WEG (WEGE3.SA) has a market value of $41.7B. It trades 44% above ATLAS fair value. ATLAS gives it a 51% chance of closing higher in a month.
Banco Santander (Brasil) (SANB11.SA) has a market value of $30.0B. It trades 49% above ATLAS fair value. ATLAS gives it a 50% chance of closing higher in a month.
Banco do Brasil (BBAS3.SA) has a market value of $27.2B. It trades 56% above ATLAS fair value. ATLAS gives it a 46% chance of closing higher in a month.
Centrais Elétricas Brasileiras (AXIA3.SA) has a market value of $27.1B. It trades 36% above ATLAS fair value. ATLAS gives it a 50% chance of closing higher in a month.
Companhia de Saneamento Básico do Estado de São Paulo - SABESP (SBSP3.SA) has a market value of $22.5B. ATLAS puts it close to its fair value. ATLAS gives it a 48% chance of closing higher in a month.

How the largest companies in Brazil 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 Brazil?

In October 2026, the three largest listed companies in Brazil by market value are Petróleo Brasileiro, Itaú Unibanco, and Vale. The three together are worth $336B.

How concentrated is the stock market in Brazil?

The three largest companies account for 35% of the combined market value of the 141 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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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