Companies: 10,795·Total market cap: $144.5T
ATCO Ltd.

ATCO Ltd.

ACO-X.TOTSXUtilities● Active
$70.63
$-1.47(-2.04%)
Market Cap$7.1B
P/E Ratio—
52W High$72.48
52W Low$47.52
Shares OutstandingFinancialsRevenue

ATCO Ltd. (ACO-X.TO) Shares Outstanding — Overview

Basic and diluted weighted average shares, YoY change, float context, and historical trend from SEC filings and FMP.

ACO-X.TO · shares outstanding · updated Jun 8, 2026

Key metrics

Basic Shares Outstanding · Weighted average · fiscal year
112.3M▲ +0.11% YoY Change
FY · as of Dec 31, 2025 · Reported in CAD
vs 112.2M in FY 2024
Diluted Shares Outstanding
112.7M
incl. options, RSUs, convertibles
Dilution Spread
+0.32%
Diluted vs Basic
YoY Change
+0.11%
year-over-year
Float (Free Float)
72.9M
publicly tradable shares
72.2% of total
Source: FMP /income-statement · /shares-float · SEC 10-K / 10-QUpdated: 2026-06-08

Shares Outstanding Growth Rate

3-Year CAGRdeclining
-0.5%
2022 → 2025
5-Year CAGRdeclining
-0.4%
2020 → 2025
10-Year CAGRdeclining
-0.2%
2015 → 2025
ⓘ

Negative CAGR typically indicates share buyback or retirement activity. Interpret alongside Splits and Financials tabs. Splits / Financials

Shares outstanding history

↓ Decrease — typically buyback / retirement
↑ Increase — issuance / equity compensation
Latest
* most recent reported · FMP /income-statement · weightedAverageShsOut

Annual shares outstanding by year

FY 2025Latest
Diluted Shares: 112.7M
112.3M
+0.11%
FY 2024
Diluted Shares: 112.3M
112.2M
-0.92%
FY 2023
Diluted Shares: 113.4M
113.2M
-0.65%
FY 2022
Diluted Shares: 114.3M
114.0M
-0.19%
FY 2021
Diluted Shares: 114.4M
114.2M
-0.20%
FMP /income-statement · weightedAverageShsOut · weightedAverageShsOutDilUnit: Billions (B)

Utilities sector shares outstanding comparison

Shares Outstanding for similar companies or competitors in the Utilities sector.

#SymbolCompanyShares (Basic)vs ACO-X.TO
#1
NextEra Energy, Inc.NEE
NextEra Energy, Inc.
2.089B+>999%
#2
The Southern CompanySO
The Southern Company
1.103B+882.2%
#3
National Grid plcNGG
National Grid plc
989.2M+780.8%
#4
Duke Energy CorporationDUK
Duke Energy Corporation
777.0M+591.9%
#5
Constellation Energy CorporationCEG
Constellation Energy Corporation
313.0M+178.7%
#6
GE Vernova Inc.GEV
GE Vernova Inc.
272.0M+142.2%
#7
ATCO Ltd.ACO-X.TO
ATCO Ltd.YOU
112.3M—

/company-screener · per-peer /income-statement · cache 86400s

Understanding Shares Outstanding

What Are Shares Outstanding? (Basic)

ATCO Ltd. (ACO-X.TO) shares outstanding is the total number of issued shares held by shareholders — the basis for Basic EPS and market capitalization. As of December 31, 2025, ATCO Ltd. reports 112.3M basic shares outstanding (weighted average).

Basic vs. Diluted Shares Outstanding

ATCO Ltd.'s basic shares outstanding (112.3M) represents currently issued shares. Diluted shares outstanding (112.7M) also includes potential shares from stock options, RSUs, and convertibles. Dilution spread: +0.32%.

Shares Outstanding vs. Float (Free Float)

ATCO Ltd.'s float is 72.9M (72.2% of total shares outstanding) — shares freely available for public trading, excluding insider-held and restricted shares.

Float72.9M(72.2%)
Outstanding101.0M

ⓘ Float data from /shares-float reflects the most recent SEC filing period-end. The weighted average shares (from /income-statement) may differ — this is a normal reporting window difference, not a data error.

FMP /income-statement · /shares-float · SEC EDGAR · CAD

About shares outstanding & methodology

ATCO Ltd. (ACO-X.TO) shares outstanding history from 2006 to 2025. Shares outstanding can be defined as the total number of shares held by all shareholders — including institutional investors, retail investors, and company insiders — assuming conversion of all convertible debt, securities, warrants, and options. This metric excludes the company's treasury shares.

ATCO Ltd. shares outstanding for the fiscal year ending December 31, 2025 were 112.3M, a 0.11% increase year-over-year. ATCO Ltd. FY 2025 shares outstanding were 112.3M, a +0.11% increase from FY 2024.

ATCO Ltd. is a leading company operating in the Utilities sector. The company's share count trajectory — with a 10-year CAGR of -0.2% — is a key signal for investors evaluating capital return policy, EPS accretion, and long-term shareholder value creation.

Figures tie to SEC 10-K/10-Q income statement disclosures and FMP /income-statement · /shares-float where noted.
Market capSplitsEarningsFinancials (Income)Cash on handFree cash flowNet incomePrice history

Frequently asked questions

ACO-X.TO shares outstanding · 4 questions

As of December 31, 2025, ATCO Ltd. (ACO-X.TO) has approximately 112.3M basic shares outstanding and 112.7M diluted shares outstanding. This represents a +0.11% year-over-year increase from FY 2024 (112.2M). The increase may reflect equity compensation issuances or secondary offerings.

ACO-X.TO shares outstandinghow many shares does ACO-X.TO haveACO-X.TO basic shares 2025ACO-X.TO diluted shares

▸ Data: FMP /income-statement · /shares-float · SEC EDGAR · weighted average basis · ATCO Ltd. SEC 10-K & 10-Q filings · US GAAP · Last updated: 2026-06-08