NiSource (NI) Market Cap 1985–2026

As of October 29, 2026, NiSource had a market cap of $21.46 billion, which increased by 2.00% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.

Data updated: Oct 29, 2026, 4:00 PM ET
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NiSource Inc. (NI)

🌍 United States 📈 NYSE 🏭 Utilities 🏢 Multi-Utilities
Latest Market Cap
$21.46B ▲ 2.00%
Start of 2026
$19.76B ▲ 8.60%
1 Year Ago
$19.94B ▲ 7.62%
All-Time High
$23.53B ▼ 8.80%


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Note: Each point on the chart represents the market capitalization at the end of the trading day.
Source: Data compiled from EDGAR filings, Bloomberg and Yahoo Finance.

📈 NiSource Market Cap History by Year and Month

NiSource Market Cap History by Year and Month
Year / MonthMarket Cap% Change
2026$21.46B▲ 8.60%
$21.46B▲ 14.76%
$18.7B▼ 4.69%
$19.62B▼ 7.89%
$21.3B▼ 6.54%
$22.79B▲ 2.84%
$22.16B▼ 4.07%
$23.1B▲ 3.45%
$22.33B▼ 1.33%
$22.63B▲ 7.97%
$20.96B▲ 6.07%
2025$19.76B▲ 15.39%
2024$17.125B▲ 56.02%
2023$10.976B▼ 1.44%
2022$11.136B▼ 0.48%
All market cap values reflect closing prices for the period shown.

📊 NiSource Market Cap and Other Industry Peers

Below are selected companies from the Utilities sector / subsector:

  1. $57.31B
  2. $56.15B
  3. $38.8B
  4. $37.35B
  5. $36.67B
  6. $30.51B
  7. $28.26B
  8. $27.99B
  9. $27.98B
  10. $27.1B
  11. $26.81B
  12. $25.57B
  13. $22.85B
  14. $21.8B
  15. $21.46B
  16. $20.51B
  17. $19.69B
  18. $18.3B
  19. $16.71B
  20. $6.21B


Data reflect the most recent market capitalization values available.

Note: Market capitalization figures are based on available sources and may differ slightly from actual values, particularly for historical data.