NiSource (NI) - Market capitalization

Market cap: C$28.25 Billion

As of February 2026 NiSource has a market cap of C$28.25 Billion. This makes NiSource the world's 1129th 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 NiSource from 1996 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	C$28.25 B	4.51%
2025	C$27.03 B	9.81%
2024	C$24.62 B	69.13%
2023	C$14.55 B	-3.66%
2022	C$15.11 B	9.36%
2021	C$13.81 B	23.28%
2020	C$11.20 B	-19.33%
2019	C$13.89 B	8.06%
2018	C$12.85 B	18.3%
2017	C$10.86 B	13.2%
2016	C$9.60 B	11.18%
2015	C$8.63 B	-44.49%
2014	C$15.55 B	41.71%
2013	C$10.97 B	42.96%
2012	C$7.67 B	12.8%
2011	C$6.80 B	38.62%
2010	C$4.91 B	9.71%
2009	C$4.47 B	22.38%
2008	C$3.65 B	-29.2%
2007	C$5.16 B	-32.71%
2006	C$7.67 B	15.97%
2005	C$6.62 B	-10.58%
2004	C$7.40 B	-0.94%
2003	C$7.47 B	-5.29%
2002	C$7.89 B	3.89%
2001	C$7.59 B	-19.78%
2000	C$9.46 B	195.89%
1999	C$3.20 B	-41.81%
1998	C$5.50 B	25.28%
1997	C$4.39 B	35.26%
1996	C$3.24 B

End of Day market cap according to different sources

On Feb 4th, 2026 the market cap of NiSource was reported to be:

C$28.68 Billion

by Nasdaq

C$28.45 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Atmos Energy ATO	C$38.76 B	37.20%	🇺🇸 USA
Sempra SRE	C$76.52 B	170.81%	🇺🇸 USA
Duke Energy DUK	C$130.87 B	363.15%	🇺🇸 USA
Chesapeake Utilities CPK	C$4.23 B	-85.00%	🇺🇸 USA
Genie Energy GNE	C$0.50 B	-98.22%	🇺🇸 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 NiSource (NI)

Market cap: C$28.25 Billion