| NI Market Cap History Table | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Below is a table of the NI market cap history going back to 1/29/2010:
Also see: NI Shares Outstanding History and NI YTD Return |
NI Market Cap History — NiSource Capitalization Over Time
As of 4/29/2026 NiSource has a market cap of 23.10 billion. Investors often follow the NI market cap history to compare the size of the company over time.
This page shows NI market capitalization trends over time, with 67 market cap datapoints presented, dating back to 1/29/2010.
| NI Market Cap History Chart | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
NI Historical Market Cap: +11.49% CAGR 
Mouse over chart for data details
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| NI Stock Price Chart |
| About NiSource Inc. (Holding Co.) |
| NiSource Inc. is an energy holding company. Co. operates through two segments: Gas Distribution Operations and Electric Operations. The Gas Distribution operations segment, through its wholly owned subsidiary NiSource Gas Distribution Group, Inc., provides natural gas to approximately 2.4 million residential, commercial and industrial customers in Ohio, Pennsylvania, Virginia, Kentucky, and Maryland. It operates approximately 55,000 miles of distribution main pipeline plus the associated individual customer service lines and 1,000 miles of transmission main pipeline located in its service areas. We show 67 historical shares outstanding datapoints in our NI shares outstanding history coverage, used to compute NI market cap on those dates. Understanding the changing numbers of shares outstanding, the changing share price, and the resulting changing NI market cap history over the course of time is important for investors interested in comparing NI's market cap history versus its peers. Many "beginner" or "novice" investors will look at one stock trading at a price of $10 per share and another trading at a price of $20 per share and think the latter company is worth twice as much. Of course, that is a completely meaningless comparison without also knowing how many shares outstanding there are for each of the two companies, and then calculating their respective market caps. Comparing the share price of NI versus a peer is one thing; comparing NI market cap versus a peer is a completely different story. Furthermore, via fluctuation both in per-share price and in the number of shares outstanding (via issuance of new shares over time, the repurchase of existing shares), the market cap for a company like NI can fluctuate over the course of history. With this page we aim to empower investors researching NI by allowing them to research the NI market cap history. |
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| Video: The Importance of Market Cap | |
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Video: The Importance of Market Cap
| NI Share Performance |
| Market Cap Peers |
| NiSource (NI) is categorized under the Utilities sector; to help you further research historical market cap numbers, below are some other companies in the same sector:
NJR Market Cap History NOVA Market Cap History NPWR Market Cap History NRG Market Cap History NWE Market Cap History NWN Market Cap History OGE Market Cap History OGS Market Cap History OPTT Market Cap History ORA Market Cap History More Utilities companies » |
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