What is the current annual operating margin of NI?

As of today, NI annual operating margin is 27.64%

What is 1-year change in NI annual operating margin?

NI annual operating margin is up +2.94% year-over-year

What is 3-year change in NI annual operating margin?

NI annual operating margin is up +39.24% over the past 3 years

How far is NI annual operating margin from its all-time high?

NI annual operating margin is currently at its all-time high

How does NI annual operating margin rank versus sector peers?

NI annual operating margin is higher than 82.57% of companies in Utilities sector

When is NI next annual earnings release?

As of today, the next annual earnings release for NI has not been scheduled

What is the current quarterly operating margin of NI?

As of today, NI quarterly operating margin is 34.67%

What is NI quarterly operating margin most recent change?

NI quarterly operating margin was up +28.08% on March 31, 2026

What is 1-year change in NI quarterly operating margin?

NI quarterly operating margin is down -0.37% year-over-year

How far is NI quarterly operating margin from its all-time high?

NI quarterly operating margin is currently -24.40% below its historical high of 45.86% set on June 30, 2019

How does NI quarterly operating margin rank versus sector peers?

NI quarterly operating margin is higher than 90.48% of companies in Utilities sector

When is NI next earnings release?

The next earnings release for NI is on August 5, 2026

NiSource Inc. (NI) Operating Margin History & Chart

Annual Operating Margin

27.64%0.79%+2.94%

December 31, 2025

Summary

Current Value: As of today, NI annual operating margin is 27.64%, up +2.94% on December 31, 2025
Historical Performance: NI annual operating margin is up +39.24% over the past 3 years, up +34.57% over the past 5 years
All-Time High Comparison: NI annual operating margin is currently at its all-time high
3-Year Low Comparison: NI annual operating margin is +39.24% above its 3-year low of 19.85% reached on an earlier date
Sector Comparison: NI annual operating margin is higher than 82.57% of companies in Utilities sector

Operating Margin Chart

beforeafter

Performance

NI Performance
Metric	Date	Value	1Y	3Y	5Y	15Y
Annual Operating Margin	Dec 31, 25	27.64%	+2.9%	+39.2%	+34.6%	+86.3%
Quarterly Operating Margin	Mar 31, 26	34.67%	-0.4%	+28.4%	+21.4%	+89.8%
Price	Aug 4, 26	$44.54	+2.8%	+68.0%	+76.4%	+475.7%
PE Ratio	Aug 4, 26	22.16	-3.7%	+20.2%	-54.4%	+213.0%
Annual Revenue	Dec 31, 25	$6.64B	+21.8%	+13.5%	+41.9%	+4.4%
Annual Operating Profit	Dec 31, 25	$1.84B	+25.4%	+58.0%	+91.0%	+94.5%
Annual Gross Margin	Dec 31, 25	58.57%	-2.6%	+17.4%	-3.7%	+29.1%
Annual Net Margin	Dec 31, 25	15.21%	-1.6%	+12.4%	+5170.0%	+228.5%

Operating Margin Highs

NI Annual Operating Margin Highs Comparison
Period	High	Date	Current
3Y	27.64%	Dec 31, 25	at high
5Y	27.64%	Dec 31, 25	at high
All	27.64%	Dec 31, 25	at high

Operating Margin Lows

NI Annual Operating Margin Lows Comparison
Period	Low	Date	Current
3Y	19.85%	N/A	+39.2%
5Y	19.85%	Dec 31, 22	+39.2%
All	2.46%	Dec 31, 18	+1023.6%

Operating Margin History

Year	Value	Change
2025	27.64%	+2.9%
2024	26.85%	+13.9%
2023	23.58%	+18.8%
2022	19.85%	-4.2%
2021	20.71%	+0.8%
2020	20.54%	-18.0%
2019	25.06%	+918.7%
2018	2.46%	-86.9%
2017	18.79%	-1.5%
2016	19.08%	+10.7%
2015	17.23%	-5.8%
2014	18.30%	-4.3%
2013	19.13%	-6.1%
2012	20.38%	+33.3%
2011	15.29%	+3.0%
2010	14.84%	+31.3%
2009	11.30%	+7.8%
2008	10.48%	-14.2%
2007	12.22%	+0.5%
2006	12.16%	-1.5%
2005	12.34%	-23.5%
2004	16.13%	-5.9%
2003	17.15%	-5.3%

Year	Value	Change
2002	18.11%	+66.8%
2001	10.86%	-7.1%
2000	11.69%	-20.4%
1999	14.68%	+2.2%
1998	14.37%	-9.5%
1997	15.87%	-27.2%
1996	21.81%	-4.5%
1995	22.84%	+6.7%
1994	21.41%	+0.1%
1993	21.39%	+3.6%
1992	20.64%	-4.9%
1991	21.70%	+1.1%
1990	21.46%	+2.8%
1989	20.87%	+23.3%
1988	16.92%	+6.4%
1987	15.90%	+10.6%
1986	14.37%	+1.8%
1985	14.12%	-17.4%
1984	17.10%	+10.2%
1983	15.52%	+46.1%
1982	10.62%	-17.5%
1981	12.88%	-1.5%
1980	13.08%	-

FAQ

What is the current annual operating margin of NI?: As of today, NI annual operating margin is 27.64%
What is 1-year change in NI annual operating margin?: NI annual operating margin is up +2.94% year-over-year
What is 3-year change in NI annual operating margin?: NI annual operating margin is up +39.24% over the past 3 years
How far is NI annual operating margin from its all-time high?: NI annual operating margin is currently at its all-time high
How does NI annual operating margin rank versus sector peers?: NI annual operating margin is higher than 82.57% of companies in Utilities sector
When is NI next annual earnings release?: As of today, the next annual earnings release for NI has not been scheduled

Operating Margin Formula

Operating Profit Margin = Operating Income

Revenue × 100%

Quarterly Operating Margin

34.67%7.60%+28.08%

March 31, 2026

Summary

Current Value: As of today, NI quarterly operating margin is 34.67%, up +28.08% on March 31, 2026
Historical Performance: NI quarterly operating margin is down -0.37% year-over-year, up +28.36% over the past 3 years
All-Time High Comparison: NI quarterly operating margin is currently -24.40% below its historical high of 45.86% set on June 30, 2019
3-Year Low Comparison: NI quarterly operating margin is +124.11% above its 3-year low of 15.47% reached on an earlier date
Sector Comparison: NI quarterly operating margin is higher than 90.48% of companies in Utilities sector

Performance

NI Performance
Metric	Date	Value	3M	1Y	3Y	5Y
Quarterly Operating Margin	Mar 31, 26	34.67%	+28.1%	-0.4%	+28.4%	+21.4%
Annual Operating Margin	Dec 31, 25	27.64%	–	+2.9%	+39.2%	+34.6%
Price	Aug 4, 26	$44.54	-7.4%	+2.8%	+68.0%	+76.4%
PE Ratio	Aug 4, 26	22.16	-7.4%	-3.7%	+20.2%	-54.4%
Quarterly Revenue	Mar 31, 26	$2.36B	+24.2%	+8.2%	+20.2%	+52.9%
Quarterly Operating Profit	Mar 31, 26	$819.20M	+59.0%	+7.8%	+54.3%	+85.6%
Quarterly Gross Margin	Mar 31, 26	59.48%	+2.3%	+1.7%	+17.6%	+4.0%
Quarterly Net Margin	Mar 31, 26	23.49%	+61.2%	-2.5%	+36.7%	+22.5%

Quarterly Operating Margin Highs

NI Quarterly Operating Margin Highs Comparison
Period	High	Date	Current
1Y	34.67%	Mar 31, 26	at high
3Y	34.80%	Mar 31, 25	-0.4%
5Y	34.80%	Mar 31, 25	-0.4%
All	45.86%	Jun 30, 19	-24.4%

Quarterly Operating Margin Lows

NI Quarterly Operating Margin Lows Comparison
Period	Low	Date	Current
1Y	20.58%	N/A	+68.5%
3Y	15.47%	N/A	+124.1%
5Y	12.11%	Jun 30, 22	+186.3%
All	-35.22%	Sep 30, 18	+198.4%

Quarterly Operating Margin History

Month	Value	Change
Mar 2026	34.67%	+28.1%
Dec 2025	27.07%	+16.1%
Sep 2025	23.32%	+13.3%
Jun 2025	20.58%	-40.9%
Mar 2025	34.80%	+31.0%
Dec 2024	26.57%	+31.3%
Sep 2024	20.24%	-9.1%
Jun 2024	22.26%	-34.9%
Mar 2024	34.19%	+32.8%
Dec 2023	25.74%	+13.6%
Sep 2023	22.66%	+46.5%
Jun 2023	15.47%	-42.7%
Mar 2023	27.01%	+25.6%
Dec 2022	21.51%	+49.8%
Sep 2022	14.36%	+18.6%
Jun 2022	12.11%	-54.2%
Mar 2022	26.44%	+30.6%
Dec 2021	20.25%	+33.0%
Sep 2021	15.22%	+5.6%
Jun 2021	14.41%	-49.5%
Mar 2021	28.55%	+51.1%
Dec 2020	18.90%	+32.5%
Sep 2020	14.26%	-21.8%
Jun 2020	18.23%	-31.7%
Mar 2020	26.68%	-1.0%
Dec 2019	26.95%	+176.4%
Sep 2019	9.75%	-78.7%
Jun 2019	45.86%	+129.1%
Mar 2019	20.02%	+477.0%
Dec 2018	-5.31%	+84.9%
Sep 2018	-35.22%	-399.5%
Jun 2018	11.76%	-48.6%
Mar 2018	22.86%	+13.5%
Dec 2017	20.14%	+66.0%
Sep 2017	12.13%	-3.4%
Jun 2017	12.56%	-51.8%
Mar 2017	26.05%	+50.7%
Dec 2016	17.29%	+31.1%
Sep 2016	13.19%	-14.2%
Jun 2016	15.37%	-42.1%
Mar 2016	26.54%	+32.5%
Dec 2015	20.03%	+47.7%
Sep 2015	13.56%	+11.0%
Jun 2015	12.22%	-48.5%
Mar 2015	23.71%	+23.2%
Dec 2014	19.24%	+51.4%
Sep 2014	12.71%	-16.7%
Jun 2014	15.25%	-29.4%
Mar 2014	21.61%	+5.7%
Dec 2013	20.45%	+47.3%
Sep 2013	13.88%	-6.1%
Jun 2013	14.78%	-38.3%
Mar 2013	23.96%	+7.3%
Dec 2012	22.34%	+78.7%
Sep 2012	12.50%	-28.3%
Jun 2012	17.44%	-29.8%
Mar 2012	24.83%	+81.0%
Dec 2011	13.72%	+6.8%
Sep 2011	12.85%	-0.5%
Jun 2011	12.91%	-29.3%
Mar 2011	18.27%	+18.0%
Dec 2010	15.48%	+45.9%
Sep 2010	10.61%	-11.1%
Jun 2010	11.94%	-33.2%

Month	Value	Change
Mar 2010	17.87%	+120.9%
Dec 2009	8.09%	-12.4%
Sep 2009	9.24%	+6.9%
Jun 2009	8.64%	-48.5%
Mar 2009	16.78%	+31.7%
Dec 2008	12.74%	+72.4%
Sep 2008	7.39%	+16.0%
Jun 2008	6.37%	-46.4%
Mar 2008	11.89%	+5.9%
Dec 2007	11.23%	+25.6%
Sep 2007	8.94%	-3.4%
Jun 2007	9.25%	-38.6%
Mar 2007	15.07%	+15.1%
Dec 2006	13.09%	+11.2%
Sep 2006	11.77%	+13.7%
Jun 2006	10.35%	-16.5%
Mar 2006	12.39%	-5.5%
Dec 2005	13.11%	-1.1%
Sep 2005	13.25%	+11.1%
Jun 2005	11.93%	-26.8%
Mar 2005	16.29%	-6.4%
Dec 2004	17.40%	+24.3%
Sep 2004	14.00%	+8.3%
Jun 2004	12.93%	-26.0%
Mar 2004	17.48%	-4.9%
Dec 2003	18.38%	+24.4%
Sep 2003	14.77%	-12.9%
Jun 2003	16.95%	-20.6%
Mar 2003	21.34%	+19.1%
Dec 2002	17.92%	+7.1%
Sep 2002	16.73%	+41.8%
Jun 2002	11.80%	-47.7%
Mar 2002	22.55%	+89.0%
Dec 2001	11.93%	+43.0%
Sep 2001	8.34%	-0.5%
Jun 2001	8.38%	-32.6%
Mar 2001	12.43%	+16.5%
Sep 2000	10.67%	+10.2%
Jun 2000	9.68%	-42.2%
Mar 2000	16.76%	+21.0%
Dec 1999	13.85%	-6.1%
Sep 1999	14.75%	+23.0%
Jun 1999	11.99%	-31.4%
Mar 1999	17.49%	+5.0%
Dec 1998	16.65%	+28.5%
Sep 1998	12.96%	+6.9%
Jun 1998	12.12%	-32.8%
Mar 1998	18.03%	+21.7%
Dec 1997	14.81%	+3.1%
Sep 1997	14.37%	+2.9%
Jun 1997	13.97%	-27.7%
Mar 1997	19.33%	+4.6%
Dec 1996	18.48%	-3.6%
Sep 1996	19.18%	+19.1%
Jun 1996	16.10%	-31.5%
Mar 1996	23.49%	+25.3%
Dec 1995	18.74%	-20.6%
Sep 1995	23.60%	+19.9%
Jun 1995	19.69%	-16.1%
Mar 1995	23.48%	+8.5%
Dec 1994	21.64%	+1.7%
Sep 1994	21.28%	+19.3%
Jun 1994	17.84%	-21.7%
Mar 1994	22.79%	-

FAQ

What is the current quarterly operating margin of NI?: As of today, NI quarterly operating margin is 34.67%
What is NI quarterly operating margin most recent change?: NI quarterly operating margin was up +28.08% on March 31, 2026
What is 1-year change in NI quarterly operating margin?: NI quarterly operating margin is down -0.37% year-over-year
How far is NI quarterly operating margin from its all-time high?: NI quarterly operating margin is currently -24.40% below its historical high of 45.86% set on June 30, 2019
How does NI quarterly operating margin rank versus sector peers?: NI quarterly operating margin is higher than 90.48% of companies in Utilities sector
When is NI next earnings release?: The next earnings release for NI is on August 5, 2026

Operating Margin Formula

Operating Profit Margin = Operating Income

Revenue × 100%

Data Sources & References

NI Official Website www.nisource.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/1111711/000111171126000027/0001111711-26-000027-index.htm
NI Profile on Yahoo Finance finance.yahoo.com/quote/NI
NI Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/ni