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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the Securities Exchange Act of 1934
Date of report (date of earliest event reported): October 30, 2026 LENNOX INTERNATIONAL INC.
(Exact name of registrant as specified in its charter)
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| Delaware | | 001-15149 | | 42-0991521 |
(State or other jurisdiction of incorporation) | | (Commission File Number) | | (IRS Employer Identification No.) |
2140 LAKE PARK BLVD.,
RICHARDSON, Texas 75080
(Address of principal executive offices, including zip code)
Registrant’s telephone number, including area code: (972)497-5000 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): | | | | | |
| ☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |
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| ☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |
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| ☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |
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| ☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) |
Securities registered pursuant to Section 12(b) of the Act: | | | | | | | | | | | | | | |
Title of Each Class | | Trading Symbol(s) | | Name of Each Exchange on Which Registered |
| Common Stock, par value $0.01 per share | | LII | | New York Stock Exchange |
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging growth company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
On October 30, 2026, Joseph F. Nassab, Executive Vice President & President, Building Climate Solutions, notified Lennox International Inc. (the “Company”) of his decision to retire from his current role on December 31, 2026. At that time, Mr. Nassab will transition to a new role with the Company as a Strategic Advisor.
Effective January 1, 2027, Geoffrey Dethlefsen, who is currently serving as Vice President and General Manager, Lennox Commercial HVAC, will succeed Mr. Nassab as Executive Vice President & President, Building Climate Solutions of the Company.
In connection with his transition to a Strategic Advisor role, on November 2, 2026, Mr. Nassab entered into a transition agreement (the “Transition Employment Agreement”) with the Company, which will supersede his previous employment agreement. The Transition Employment Agreement will be effective January 1, 2027, and will continue through February 28, 2028 (the “Advisory Period”). During the Advisory Period, Mr. Nassab will report to the Chief Executive Officer and perform services including supporting relationship continuity with key customers, distributors, and strategic partners; mentoring, coaching, and advising key leaders; and advising on special projects, where applicable. As compensation for these services, Mr. Nassab will receive an annual salary of $180,000, continue to participate in the Company’s benefit plans and programs in accordance with their terms, and be eligible for continuing vesting of his outstanding equity-based awards in accordance with their terms. The Transition Employment Agreement also includes confidentiality, non-competition, and non-solicitation covenants for 24 months following the termination of the Advisory Period.
The foregoing description of the Transition Employment Agreement does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Transition Employment Agreement, a copy of which is filed as Exhibit 10.1 to this Current Report on Form 8-K and is incorporated herein by reference.
Item 7.01 Regulation FD Disclosure.*
A copy of the press release issued by the Company on November 2, 2026, announcing Mr. Nassab’s retirement and Mr. Dethlefsen’s appointment, is furnished as Exhibit 99.1 to this report.
Item 9.01 Financial Statements and Exhibits.
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EXHIBIT NUMBER | | DESCRIPTION |
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| 10.1 | | Transition Employment Agreement entered into between the Company and Joseph F. Nassab (filed herewith). |
| 99.1 | | Press release dated November 2, 2026 (furnished herewith).* |
| 104 | | Inline XBRL for the cover page of this Current Report on Form 8-K |
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| * | The information contained in Item 7.01 and Exhibit 99.1 of this report is being “furnished” with the Securities and Exchange Commission and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities under that section. Furthermore, such information shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, unless specifically identified as being incorporated therein by reference. |
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
LENNOX INTERNATIONAL INC.
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| Date: November 2, 2026 |
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| By: | | /s/ Jennifer S. Perry |
| Name: | | Jennifer S. Perry |
| Title: | | Assistant Secretary |
Lennox Announces Building Climate Solutions Leadership Transition
Joe Nassab to transition to Strategic Advisor role, Geoff Dethlefsen named Executive Vice President and President, Building Climate Solutions
DALLAS, Nov. 2, 2026 /PRNewswire/ -- Lennox (NYSE: LII), a leader in energy-efficient building and home comfort solutions, today announced that Joe Nassab, Executive Vice President and President of Building Climate Solutions, will transition from his role at the end of 2026 and continue with Lennox as a strategic advisor. Geoff Dethlefsen, currently Vice President and General Manager of Lennox Commercial HVAC, will assume leadership of Building Climate Solutions effective January 1, 2027.
“Joe has made a lasting impact on Lennox through his leadership, industry expertise, and unwavering commitment to our customers and employees,” said Alok Maskara, Chief Executive Officer of Lennox. “I am delighted that Lennox will continue to benefit from Joe’s leadership and deep industry experience. In his new capacity, Joe will focus on supporting the Building Climate Solutions segment and coaching and developing our general managers and the next generation of leaders.”
Nassab joined Lennox in 2010 as Vice President and General Manager of Allied Air. In 2022, he was named to lead the North American Commercial Heating and Cooling segment, which was later renamed Building Climate Solutions. During his tenure, Nassab helped transform Building Climate Solutions into a broader commercial equipment and services platform. The segment expanded its capabilities through initiatives including the acquisition of AES and investments in manufacturing, distribution, and customer experience.
“It has been a privilege to work alongside the talented teams across Lennox,” said Nassab. “I am proud of what we have accomplished and confident that Geoff and the Building Climate Solutions team will continue driving the business forward and delivering for our customers.”
Building Climate Solutions will continue the momentum established under Joe’s leadership while advancing the segment’s strategy for growth, operational excellence, and differentiated customer value. “Geoff has delivered strong results since joining Lennox,” Maskara noted. “Lennox Commercial HVAC has grown in revenue and margins, improved operations, and opened our new manufacturing facility in Saltillo under his leadership. His record of commercial execution, operational leadership, and disciplined capacity expansion positions him well to continue accelerating growth and expanding margins across Building Climate Solutions.”
Dethlefsen joined Lennox in 2024 with more than 20 years of leadership experience in industrial manufacturing, strategy, and business operations. Before joining Lennox, he served as President of Hammerforce USA and President of Professional Grade Trailers, a division of American Trailer World. He also held leadership roles at Flowserve Corporation and Boston Consulting
Group. Dethlefsen holds bachelor’s degrees in mechanical engineering and Spanish from Rice University and an MBA from The University of Texas at Austin.
“I am honored to lead Building Climate Solutions and build on the strong foundation Joe and the team have established,” said Dethlefsen. “We will remain focused on serving our customers, strengthening execution, and capturing the significant growth opportunities ahead.”
About Lennox
Lennox (NYSE: LII) is a leader in energy-efficient building solutions and is committed to creating healthier and more comfortable environments. Serving residential and commercial customers, the company delivers innovative heating, cooling, indoor air quality, refrigeration, and water heating systems. Through trusted products, parts, and services, and advanced technology, Lennox delivers connected solutions that support the full lifecycle of customer needs. Additional information is available at www.lennox.com.
For media inquiries, contact PR@lennox.com.
