Market Cap

ATCO Ltd. Market Capitalization:

C$6.46 Billion

CAD as of Jan. 1, 2026

US$4.72 Billion

ATCO Ltd. Company Profile

ATCO Ltd. Main Stock Listings

TSX: ACO.X

TSX: ACO.Y

Market Capitalization History of ATCO Ltd.

Market capitalizations are calculated from the opening stock price at the beginning of each month.

Top Competitors by Market Capitalization

Industry: Utilities—Diversified

Company	Market Cap (USD)
Iberdrola, SA	$146.18 B
Enel SpA	$106.27 B
National Grid plc	$77.12 B
Engie SA	$65.60 B
PacifiCorp	$65.07 B

Sector: Utilities

Company	Market Cap (USD)
NextEra Energy	$168.55 B
Iberdrola, SA	$146.18 B
Siemens Energy	$123.41 B
Constellation Energy	$114.42 B
Enel SpA	$106.27 B

Yearly evolution of ATCO Ltd. market cap

Date	Market Cap	YoY Change
Jan. 1, 2026	C$6.46 B	17.00%
Jan. 1, 2025	C$5.52 B	25.02%
Jan. 1, 2024	C$4.42 B	-7.78%
Jan. 1, 2023	C$4.79 B	-0.30%
Jan. 1, 2022	C$4.81 B	16.96%
Jan. 1, 2021	C$4.11 B

Market capitalization is calculated from the opening stock price at the beginning of each year.

ATCO Ltd. Categories

Canada Utilities Utilities—Diversified

Canada Utilities

Canada Utilities—Diversified

Stocks & Indices

ATCO Ltd. has the following listings and related stock indices.

Stock: TSX: ACO.X

S&P/TSX Completion

S&P/TSX Composite

Stock: TSX: ACO.Y

Stock: FSX: 8A6

Stock: OTC: ACLLF

Stock: OTC: ACLTF

What is a company's market capitalization?

The market capitalization of a company, more simply referred to as "market cap", is the total market value of a publicly traded company's outstanding shares. It is often considered as a key indicator of what a company is worth.