Realty Income (O) - Market capitalization

Market cap: C$80.41 Billion

As of September 2026 Realty Income has a market cap of C$80.41 Billion. This makes Realty Income the world's 436th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of Realty Income from 1996 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	C$80.41 B	12.6%
2025	C$71.41 B	7.98%
2024	C$66.13 B	19.95%
2023	C$55.13 B	2.14%
2022	C$53.97 B	4.57%
2021	C$51.61 B	85.52%
2020	C$27.82 B	-13.28%
2019	C$32.08 B	23%
2018	C$26.08 B	29.12%
2017	C$20.20 B	1.13%
2016	C$19.97 B	11.38%
2015	C$17.93 B	44.05%
2014	C$12.45 B	51.01%
2013	C$8.24 B	54.51%
2012	C$5.33 B	12.65%
2011	C$4.73 B	17.37%
2010	C$4.03 B	41.96%
2009	C$2.84 B	-3.13%
2008	C$2.93 B	7.72%
2007	C$2.72 B	-16.14%
2006	C$3.24 B	54.23%
2005	C$2.10 B	-12.54%
2004	C$2.40 B	22.46%
2003	C$1.96 B	-8.67%
2002	C$2.15 B	40.08%
2001	C$1.53 B	55.31%
2000	C$0.99 B	24.07%
1999	C$0.79 B	-22.2%
1998	C$1.02 B	9.8%
1997	C$0.93 B	24.29%
1996	C$0.75 B

End of Day market cap according to different sources

On Aug 31st, 2026 the market cap of Realty Income was reported to be:

C$80.43 Billion

by Nasdaq

C$80.41 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Walmart WMT	C$1.153 T	1,334.89%	🇺🇸 USA
Dollar General DG	C$38.78 B	-51.77%	🇺🇸 USA
CVS Health CVS	C$166.57 B	107.14%	🇺🇸 USA
AMC Entertainment AMC	C$3.26 B	-95.94%	🇺🇸 USA
Rite Aid RAD	C$50.97 M	-99.94%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of Realty Income (O)

Market cap: C$80.41 Billion