NiSource Inc (NYSE:NI) — Market Cap & Net Worth
Market Cap & Net Worth: NiSource Inc (NI)
NiSource Inc (NYSE:NI) has a market capitalization of $19.50 Billion ($19.50 Billion) as of September 18, 2026. Listed on the NYSE stock exchange, this USA-based company holds position #1311 globally and #539 in its home market, demonstrating a -1.76% decrease in market value over the past year.
Market capitalization, also known as net worth in stock markets, is calculated by multiplying NiSource Inc's stock price $40.66 by its total outstanding shares 479560100 (479.56 Million). Also see total assets of NiSource Inc for a full breakdown of the balance sheet.
NiSource Inc Market Cap History: 2015 to 2026
NiSource Inc's market capitalization history from 2015 to 2026. Data shows growth from $6.99 Billion to $19.50 Billion (9.91% CAGR). Also see NiSource Inc (NI) cash flow conversion for how efficiently the company converts equity into cash flow.
Index Memberships
NiSource Inc is a constituent of 2 market indices:
| Index | Total Market Cap | Weight (%) | Rank by Market Cap |
|---|---|---|---|
|
Dow Jones Composite Average
DJA
|
$17.96 Trillion | 0.11% | #50 of 65 |
|
S&P 500 Index
GSPC
|
$62.72 Trillion | 0.04% | #369 of 503 |
Weight: NiSource Inc's market cap as a percentage of total index value. Rank: Position among all constituents by market cap.
NiSource Inc Market Cap to Earnings & Revenue Ratios Timeline
This chart shows how NiSource Inc's valuation ratios have evolved. The Price to Sales (P/S) ratio compares market cap to revenue, while the Price to Earnings (P/E) ratio compares market cap to net income. Lower values may indicate a more undervalued company relative to its financial performance. Check NiSource Inc stock quote for real-time trading data and today's change.
Latest Price to Sales (P/S) Ratio
3.02x
NiSource Inc's market cap is 3.02 times its annual revenue
Latest Price to Earnings (P/E) Ratio
21.55x
NiSource Inc's market cap is 21.55 times its annual earnings
What These Ratios Tell Investors:
- Price to Sales (P/S) Ratio: Shows how much investors are paying for each dollar of the company's sales. Lower P/S ratios may indicate undervaluation.
- Price to Earnings (P/E) Ratio: Shows how much investors are paying for each dollar of the company's earnings. This is one of the most common valuation metrics.
- Trends in these ratios over time can indicate changing investor sentiment about the company's future growth prospects.
- Industry comparison provides context for whether the company is valued higher or lower than peers.
| Year | Market Cap (USD) | Revenue (USD) | Net Income (USD) | P/S Ratio | P/E Ratio |
|---|---|---|---|---|---|
| 2016 | $8.16 Billion | $4.49 Billion | $331.50 Million | 1.82x | 24.62x |
| 2017 | $9.73 Billion | $4.87 Billion | $128.50 Million | 2.00x | 75.75x |
| 2018 | $9.92 Billion | $5.11 Billion | -$50.60 Million | 1.94x | N/A |
| 2019 | $11.21 Billion | $5.21 Billion | $383.10 Million | 2.15x | 29.27x |
| 2020 | $9.55 Billion | $4.68 Billion | -$17.60 Million | 2.04x | N/A |
| 2021 | $11.91 Billion | $4.90 Billion | $584.90 Million | 2.43x | 20.36x |
| 2022 | $12.23 Billion | $5.85 Billion | $804.10 Million | 2.09x | 15.21x |
| 2023 | $12.29 Billion | $5.51 Billion | $714.30 Million | 2.23x | 17.20x |
| 2024 | $17.63 Billion | $5.46 Billion | $760.40 Million | 3.23x | 23.18x |
| 2025 | $20.03 Billion | $6.64 Billion | $929.50 Million | 3.02x | 21.55x |
Competitor Companies of NI by Market Capitalization
Companies near NiSource Inc in the global market cap rankings as of September 18, 2026. Review NiSource Inc tangible net worth ratio to assess the quality of the company's equity after excluding intangible assets.
Key companies related to NiSource Inc by market ranking:
- Atmos Energy Corporation (NYSE:ATO): Ranked #991 globally with a market cap of $27.03 Billion USD.
- Naturgy Energy Group SA (MC:NTGY): Ranked #1078 globally with a market cap of $24.77 Billion USD ( €21.19 Billion EUR).
- SNAM S.P.A. ADR 2 (F:SNM0): Ranked #1322 globally with a market cap of $19.32 Billion USD ( €16.52 Billion EUR).
- H.K. CHINA GAS HD-25 ADR (F:HCGS): Ranked #1650 globally with a market cap of $14.74 Billion USD ( €12.61 Billion EUR).
| Rank | Company | Symbol | Market Cap | Price |
|---|---|---|---|---|
| #991 | Atmos Energy Corporation | NYSE:ATO | $27.03 Billion | $161.96 |
| #1078 | Naturgy Energy Group SA | MC:NTGY | $24.77 Billion | €29.58 |
| #1322 | SNAM S.P.A. ADR 2 | F:SNM0 | $19.32 Billion | €13.30 |
| #1650 | H.K. CHINA GAS HD-25 ADR | F:HCGS | $14.74 Billion | €0.74 |
NiSource Inc Historical Marketcap From 2015 to 2026
Between 2015 and today, NiSource Inc's market cap moved from $6.99 Billion to $ 19.50 Billion, with a yearly change of 9.91%.
| Year | Market Cap | Change (%) |
|---|---|---|
| 2026 | $19.50 Billion | -2.63% |
| 2025 | $20.03 Billion | +13.60% |
| 2024 | $17.63 Billion | +43.49% |
| 2023 | $12.29 Billion | +0.48% |
| 2022 | $12.23 Billion | +2.67% |
| 2021 | $11.91 Billion | +24.75% |
| 2020 | $9.55 Billion | -14.87% |
| 2019 | $11.21 Billion | +13.03% |
| 2018 | $9.92 Billion | +1.92% |
| 2017 | $9.73 Billion | +19.28% |
| 2016 | $8.16 Billion | +16.70% |
| 2015 | $6.99 Billion | -- |
End of Day Market Cap According to Different Sources
On Sep 17th, 2026 the market cap of NiSource Inc was reported to be:
| Source | Market Cap |
|---|---|
| Yahoo Finance | $19.50 Billion USD |
| MoneyControl | $19.50 Billion USD |
| MarketWatch | $19.50 Billion USD |
| marketcap.company | $19.50 Billion USD |
| Reuters | $19.50 Billion USD |
Market cap values may vary slightly between sources due to differences in calculation methods, timing, and data refresh rates.
About NiSource Inc
NiSource Inc., an energy holding company, operates as a regulated natural gas and electric utility company in the United States. It operates in two segments, Columbia Operations and NIPSCO Operations. The company provides natural gas to residential, commercial, and industrial customers through approximately 37,300 miles of distribution main pipeline and the associated individual customer service … Read more