What is the current annual operating margin of LII?

As of today, LII annual operating margin is 20.28%

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

LII annual operating margin is up +4.00% year-over-year

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

LII annual operating margin is up +47.17% over the past 3 years

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

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

How does LII annual operating margin rank versus sector peers?

LII annual operating margin is higher than 88.16% of companies in Industrials sector

When is LII next annual earnings release?

The next annual earnings release for LII is on February 3, 2027

What is the current quarterly operating margin of LII?

As of today, LII quarterly operating margin is 20.34%

What is LII quarterly operating margin most recent change?

LII quarterly operating margin was down -11.80% on September 30, 2026

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

LII quarterly operating margin is down -5.48% year-over-year

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

LII quarterly operating margin is currently -11.80% below its historical high of 23.06% set on June 30, 2026

How does LII quarterly operating margin rank versus sector peers?

LII quarterly operating margin is higher than 84.23% of companies in Industrials sector

When is LII next earnings release?

The next earnings release for LII is on February 3, 2027

LII Operating Margin History & Chart Since 1997

Annual Operating Margin

20.28%0.78%+4.00%

December 31, 2025

Summary

Current Value: As of today, LII annual operating margin is 20.28%, up +4.00% on December 31, 2025
Historical Performance: LII annual operating margin is up +47.17% over the past 3 years, up +51.80% over the past 5 years
All-Time High Comparison: LII annual operating margin is currently at its all-time high
3-Year Low Comparison: LII annual operating margin is +47.17% above its 3-year low of 13.78% reached on an earlier date
Sector Comparison: LII annual operating margin is higher than 88.16% of companies in Industrials sector

Operating Margin Chart

beforeafter

Performance

LII Performance
Metric	Date	Value	1Y	3Y	5Y	15Y
Annual Operating Margin	Dec 31, 25	20.28%	+4.0%	+47.2%	+51.8%	+218.4%
Quarterly Operating Margin	Sep 30, 26	20.34%	-5.5%	+11.3%	+34.2%	+203.1%
Price	Nov 6, 26	$341.97	-30.4%	-11.2%	+13.2%	+928.5%
PE Ratio	Nov 6, 26	15.87	-21.2%	-37.5%	-31.6%	-11.7%
Annual Revenue	Dec 31, 25	$5.20B	-2.7%	+10.1%	+43.0%	+67.8%
Annual Operating Profit	Dec 31, 25	$1.05B	+1.2%	+62.1%	+116.9%	+434.4%
Annual Gross Margin	Dec 31, 25	33.39%	+0.7%	+23.4%	+16.5%	+17.4%
Annual Net Margin	Dec 31, 25	15.51%	+2.6%	+47.1%	+57.8%	+310.3%

Operating Margin Highs

LII Annual Operating Margin Highs Comparison
Period	High	Date	Current
3Y	20.28%	Dec 31, 25	at high
5Y	20.28%	Dec 31, 25	at high
All	20.28%	Dec 31, 25	at high

Operating Margin Lows

LII Annual Operating Margin Lows Comparison
Period	Low	Date	Current
3Y	13.78%	N/A	+47.2%
5Y	13.36%	N/A	+51.8%
All	2.32%	Dec 31, 01	+774.1%

Operating Margin History

Year	Value	Change
2025	20.28%	+4.0%
2024	19.50%	+15.3%
2023	16.91%	+22.7%
2022	13.78%	-1.5%
2021	13.99%	+4.7%
2020	13.36%	+2.8%
2019	13.00%	+2.0%
2018	12.74%	+4.2%
2017	12.23%	-4.4%
2016	12.79%	+17.2%
2015	10.91%	+10.2%
2014	9.90%	+7.1%
2013	9.24%	+23.2%
2012	7.50%	+53.4%
2011	4.89%	-23.2%

Year	Value	Change
2010	6.37%	+12.0%
2009	5.69%	-20.4%
2008	7.15%	-1.9%
2007	7.29%	+65.7%
2006	4.40%	-22.7%
2005	5.69%	+4.6%
2004	5.44%	+10.8%
2003	4.91%	+18.3%
2002	4.15%	+78.9%
2001	2.32%	-54.1%
2000	5.05%	-53.3%
1999	10.82%	+85.0%
1998	5.85%	-19.3%
1997	7.25%	-

FAQ

What is the current annual operating margin of LII?: As of today, LII annual operating margin is 20.28%
What is 1-year change in LII annual operating margin?: LII annual operating margin is up +4.00% year-over-year
What is 3-year change in LII annual operating margin?: LII annual operating margin is up +47.17% over the past 3 years
How far is LII annual operating margin from its all-time high?: LII annual operating margin is currently at its all-time high
How does LII annual operating margin rank versus sector peers?: LII annual operating margin is higher than 88.16% of companies in Industrials sector
When is LII next annual earnings release?: The next annual earnings release for LII is on February 3, 2027

Operating Margin Formula

Operating Profit Margin = Operating Income

Revenue × 100%

Quarterly Operating Margin

20.34%2.72%-11.80%

September 30, 2026

Summary

Current Value: As of today, LII quarterly operating margin is 20.34%, down -11.80% on September 30, 2026
Historical Performance: LII quarterly operating margin is down -5.48% year-over-year, up +11.33% over the past 3 years
All-Time High Comparison: LII quarterly operating margin is currently -11.80% below its historical high of 23.06% set on June 30, 2026
3-Year Low Comparison: LII quarterly operating margin is +39.03% above its 3-year low of 14.63% reached on March 31, 2026
Sector Comparison: LII quarterly operating margin is higher than 84.23% of companies in Industrials sector

Performance

LII Performance
Metric	Date	Value	3M	1Y	3Y	5Y
Quarterly Operating Margin	Sep 30, 26	20.34%	-11.8%	-5.5%	+11.3%	+34.2%
Annual Operating Margin	Dec 31, 25	20.28%	–	+4.0%	+47.2%	+51.8%
Price	Nov 6, 26	$341.97	-21.5%	-30.4%	-11.2%	+13.2%
PE Ratio	Nov 6, 26	15.87	-18.0%	-21.2%	-37.5%	-31.6%
Quarterly Revenue	Sep 30, 26	$1.57B	+1.8%	+10.2%	+15.1%	+48.4%
Quarterly Operating Profit	Sep 30, 26	$319.90M	-10.2%	+4.2%	+28.2%	+99.1%
Quarterly Gross Margin	Sep 30, 26	31.62%	-9.4%	-3.7%	+0.8%	+13.7%
Quarterly Net Margin	Sep 30, 26	14.07%	-19.2%	-18.3%	+47.5%	+18.0%

Quarterly Operating Margin Highs

LII Quarterly Operating Margin Highs Comparison
Period	High	Date	Current
1Y	23.06%	Jun 30, 26	-11.8%
3Y	23.06%	Jun 30, 26	-11.8%
5Y	23.06%	Jun 30, 26	-11.8%
All	23.06%	Jun 30, 26	-11.8%

Quarterly Operating Margin Lows

LII Quarterly Operating Margin Lows Comparison
Period	Low	Date	Current
1Y	14.63%	Mar 31, 26	+39.0%
3Y	14.63%	Mar 31, 26	+39.0%
5Y	10.46%	Dec 31, 21	+94.5%
All	-5.95%	Dec 31, 01	+441.9%

Quarterly Operating Margin History

Month	Value	Change
Sep 2026	20.34%	-11.8%
Jun 2026	23.06%	+57.6%
Mar 2026	14.63%	-18.4%
Dec 2025	17.92%	-16.7%
Sep 2025	21.52%	-6.1%
Jun 2025	22.93%	+45.0%
Mar 2025	15.81%	-16.3%
Dec 2024	18.88%	-6.9%
Sep 2024	20.29%	-7.9%
Jun 2024	22.03%	+36.2%
Mar 2024	16.17%	+5.5%
Dec 2023	15.32%	-16.1%
Sep 2023	18.27%	-5.1%
Jun 2023	19.25%	+47.7%
Mar 2023	13.03%	+10.6%
Dec 2022	11.78%	-20.2%
Sep 2022	14.76%	-11.0%
Jun 2022	16.58%	+49.0%
Mar 2022	11.13%	+6.4%
Dec 2021	10.46%	-31.0%
Sep 2021	15.16%	-12.5%
Jun 2021	17.32%	+45.7%
Mar 2021	11.89%	-19.4%
Dec 2020	14.76%	-9.1%
Sep 2020	16.23%	+5.3%
Jun 2020	15.41%	+219.7%
Mar 2020	4.82%	-57.5%
Dec 2019	11.33%	-25.1%
Sep 2019	15.13%	-7.8%
Jun 2019	16.41%	+123.0%
Mar 2019	7.36%	-25.1%
Dec 2018	9.82%	-33.4%
Sep 2018	14.75%	-11.8%
Jun 2018	16.73%	+121.3%
Mar 2018	7.56%	-29.5%
Dec 2017	10.73%	-25.1%
Sep 2017	14.33%	-6.6%
Jun 2017	15.34%	+124.6%
Mar 2017	6.83%	-39.9%
Dec 2016	11.36%	-26.6%
Sep 2016	15.47%	-0.5%
Jun 2016	15.55%	+135.2%
Mar 2016	6.61%	-28.4%
Dec 2015	9.23%	-33.5%
Sep 2015	13.87%	+3.3%
Jun 2015	13.43%	+185.1%
Mar 2015	4.71%	-50.4%
Dec 2014	9.50%	-19.8%
Sep 2014	11.85%	-2.3%
Jun 2014	12.13%	+151.1%
Mar 2014	4.83%	-42.1%
Dec 2013	8.34%	-28.5%
Sep 2013	11.67%	+2.2%
Jun 2013	11.42%	+191.3%
Mar 2013	3.92%	-35.1%
Dec 2012	6.04%	-39.8%

Month	Value	Change
Sep 2012	10.03%	+20.7%
Jun 2012	8.31%	+1,038.4%
Mar 2012	0.73%	-87.7%
Dec 2011	5.95%	-11.3%
Sep 2011	6.71%	-6.0%
Jun 2011	7.14%	+453.5%
Mar 2011	-2.02%	-132.6%
Dec 2010	6.19%	-26.5%
Sep 2010	8.42%	+4.3%
Jun 2010	8.07%	+3,935.0%
Mar 2010	0.20%	-95.5%
Dec 2009	4.46%	-48.3%
Sep 2009	8.63%	+11.5%
Jun 2009	7.74%	+382.5%
Mar 2009	-2.74%	-147.2%
Dec 2008	5.81%	-43.6%
Sep 2008	10.30%	+13.9%
Jun 2008	9.04%	+659.7%
Mar 2008	1.19%	-84.8%
Dec 2007	7.81%	-18.6%
Sep 2007	9.59%	+8.9%
Jun 2007	8.81%	+427.5%
Mar 2007	1.67%	-59.7%
Dec 2006	4.14%	-28.7%
Sep 2006	5.81%	-10.8%
Jun 2006	6.51%	+123.7%
Mar 2006	2.91%	-40.5%
Dec 2005	4.89%	-46.7%
Sep 2005	9.18%	+15.3%
Jun 2005	7.96%	+218.4%
Mar 2005	2.50%	-47.5%
Dec 2004	4.76%	-25.5%
Sep 2004	6.39%	-22.3%
Jun 2004	8.22%	+182.5%
Mar 2004	2.91%	-24.6%
Dec 2003	3.86%	-38.7%
Sep 2003	6.30%	-8.3%
Jun 2003	6.87%	+321.5%
Mar 2003	1.63%	-11.9%
Dec 2002	1.85%	-70.0%
Sep 2002	6.16%	-2.7%
Jun 2002	6.33%	+352.1%
Mar 2002	1.40%	+123.5%
Dec 2001	-5.95%	-219.2%
Sep 2001	4.99%	-2.3%
Jun 2001	5.11%	+1,029.1%
Mar 2001	-0.55%	-112.2%
Dec 2000	4.49%	+7.7%
Sep 2000	4.17%	-46.5%
Jun 2000	7.80%	+137.8%
Mar 2000	3.28%	-85.0%
Dec 1999	21.93%	+168.4%
Sep 1999	8.17%	-30.1%
Jun 1999	11.69%	+49.3%
Mar 1999	7.83%	-

FAQ

What is the current quarterly operating margin of LII?: As of today, LII quarterly operating margin is 20.34%
What is LII quarterly operating margin most recent change?: LII quarterly operating margin was down -11.80% on September 30, 2026
What is 1-year change in LII quarterly operating margin?: LII quarterly operating margin is down -5.48% year-over-year
How far is LII quarterly operating margin from its all-time high?: LII quarterly operating margin is currently -11.80% below its historical high of 23.06% set on June 30, 2026
How does LII quarterly operating margin rank versus sector peers?: LII quarterly operating margin is higher than 84.23% of companies in Industrials sector
When is LII next earnings release?: The next earnings release for LII is on February 3, 2027

Operating Margin Formula

Operating Profit Margin = Operating Income

Revenue × 100%

Data Sources & References

LII Official Website www.lennox.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/1069202/000106920226000005/0001069202-26-000005-index.htm
LII Profile on Yahoo Finance finance.yahoo.com/quote/LII
LII Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/lii