Market Cap for NiSource (NI)
According to NiSource's latest reported financial statements, the company's latest reported market cap is $19.82B USD. Market capitalization is the total dollar value of all outstanding shares — shares outstanding × stock price — and the standard measure of a company's equity value. On this page, historical market cap snaps filing-period share counts to closing prices on or before each statement date (not intraday tick data).
Headline figure above is from the reporting period ending (reported ). Chart and table below cover the full reported history back to .
NI
Currently viewingMarket CapSwitch metric
Latest period
$19.82B
YoY change
+15.4%
5Y CAGR
+14.7%
Peak year (2026)
$22.86B
Latest annual
$22.86B
Market Cap history chart for NiSource (NI) from 1985 to 2026
Market Cap history table for NiSource (NI) from 1985 to 2026
| Fiscal year | Period ended | Reported | Market Cap | YoY |
|---|---|---|---|---|
| 2026 | $22.86B | +15.4% | ||
| 2025 | $19.82B | +18.2% | ||
| 2024 | $16.76B | +41.0% | ||
| 2023 | $11.89B | -2.0% | ||
| 2022 | $12.14B | +5.4% | ||
| 2021 | $11.52B | +30.7% | ||
| 2020 | $8.82B | -15.8% | ||
| 2019 | $10.47B | +15.8% | ||
| 2018 | $9.04B | +6.4% | ||
| 2017 | $8.49B | +18.6% | ||
| 2016 | $7.16B | +14.8% | ||
| 2015 | $6.24B | +18.2% | ||
| 2014 | $5.28B | +30.3% | ||
| 2013 | $4.05B | +37.9% | ||
| 2012 | $2.94B | +8.8% | ||
| 2011 | $2.70B | +39.3% | ||
| 2010 | $1.94B | +16.4% | ||
| 2009 | $1.67B | +40.3% | ||
| 2008 | $1.19B | -41.8% | ||
| 2007 | $2.04B | -21.3% | ||
| 2006 | $2.59B | +15.7% | ||
| 2005 | $2.24B | -5.8% | ||
| 2004 | $2.38B | +6.8% | ||
| 2003 | $2.23B | +33.0% | ||
| 2002 | $1.67B | -12.0% | ||
| 2001 | $1.90B | +29.4% | ||
| 2000 | $1.47B | +65.7% | ||
| 1999 | $886.62M | -39.2% | ||
| 1998 | $1.46B | +20.4% | ||
| 1997 | $1.21B | +25.9% | ||
| 1996 | $962.04M | +0.2% | ||
| 1995 | $960.33M | +25.5% | ||
| 1994 | $765.26M | -11.0% | ||
| 1993 | $859.46M | +22.3% | ||
| 1992 | $702.56M | +2.3% | ||
| 1991 | $686.79M | +46.4% | ||
| 1990 | $468.96M | -15.6% | ||
| 1989 | $555.36M | +37.6% | ||
| 1988 | $403.65M | +67.8% | ||
| 1987 | $240.60M | -26.9% | ||
| 1986 | $328.98M | +19.4% | ||
| 1985 | $275.48M | — |
Market Cap values are taken from NiSource's reported income statements (10-Q quarterly and 10-K annual filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the date the filing was reported; YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
Analysis
The 2026 reading of NiSource (NI) market cap is $22.86B – grew 15.4% year-over-year.
Over 2021–2026 (5 years), NiSource market cap expanded at a +14.7% compound annual rate, sustaining 3 straight years of year-over-year growth.
2026 marks the peak market cap at $22.86B, with the historical low of $240.60M recorded in 1987.
Within Utilities, NiSource (NI) ranks 9th among 8 peers we track. The peer median for market cap is $97.46B.
NiSource Market Cap by Year
NiSource Market Cap 2026: $22.86B
NiSource market cap in 2026 was $22.86B, grew 15.4% from 2025. This figure represents the highest annual value in the available history.
NiSource Market Cap 2025: $19.82B
NiSource market cap in 2025 was $19.82B, grew 18.2% from 2024.
NiSource Market Cap 2024: $16.76B
NiSource market cap in 2024 was $16.76B, surged 41.0% from 2023.
NiSource Market Cap 2023: $11.89B
NiSource market cap in 2023 was $11.89B, edged down 2.0% below 2022.
NiSource Market Cap 2022: $12.14B
NiSource market cap in 2022 was $12.14B.
See more financial history for NiSource (NI).
Sector peers — Market Cap
Companies in the same sector as NiSource, ranked by their latest market cap.
| Company | Market Cap | Sector |
|---|---|---|
| GE Vernova Inc. (GEV) | $292.62B | Utilities |
| NextEra Energy, Inc. (NEE) | $201.26B | Utilities |
| The Southern Company (SO) | $106.43B | Utilities |
| Duke Energy Corporation (DUK) | $99.46B | Utilities |
| Constellation Energy Corporation (CEG) | $95.47B | Utilities |
| American Electric Power Company, Inc. (AEP) | $73.70B | Utilities |
| Sempra (SRE) | $60.69B | Utilities |
| Dominion Energy, Inc. (D) | $55.28B | Utilities |
Frequently asked questions
What is NiSource's market cap?
- Latest reported market cap for NiSource (NI) is $19.82B (period ending December 31, 2025).
How has NiSource market cap changed year-over-year?
- NiSource (NI) market cap changed +15.4% year-over-year on the latest annual filing.
What is the long-term growth rate of NiSource market cap?
- NiSource (NI) market cap compound annual growth rate is +14.7% over the most recent 5 years available.
When did NiSource market cap hit its highest annual value?
- NiSource market cap reached its highest annual value of $22.86B in 2026.
What was NiSource market cap in 2025?
- NiSource (NI) market cap in 2025 was $19.82B.
What was NiSource market cap in 2026?
- NiSource (NI) market cap in 2026 was $22.86B.
Metrics overview
Pick a metric for charts, filings, and peers — each row shows the latest TTM or annual value with year-over-year change.
Explore more
NI Overview
Company profile, financial tools, and key metrics
NI Revenue Counter
Earns $210.62 every second. See per minute, hour, and day.
NI Earnings Counter
Earns $29.47 per second net profit. See per minute, hour, and day.
NI Economic Scale
Exceeds French Polynesia's GDP. Compare with world economies.
NI What If Invested
What if you had invested $1,000? See historical returns from any date.
NI How It Makes Money
Discover visual breakdown of $6.64B in revenue — where it comes from and where it goes.
NI Stock Seasonality
Best and worst months to invest. Historical monthly returns heatmap.
NI Price Target Scenarios
Model bear, base, and bull cases with EPS growth and exit P/E — pre-filled from analysts and history.
NI Daily Price Character
Steady · 42.4% historical win rate (green days). Streaks & record days.
NI Buybacks
Recent repurchase activity. Shareholder yield & SBC comparison.
NI Stock Split History
2 splits on record. Dates, ratios, and cumulative multiple.
NI Dividend Profile
Yield: 2.37%. Safety: 5/8. See full history.
NI Dividend Calculator
How much dividend income would $1,000 have earned? Calculate from any date.
NI Dividend Forecast
Project future income with DRIP, growth assumptions, and optional monthly contributions.