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Energy efficiency companies in Illinois are dedicated to reducing energy consumption and enhancing sustainability across various sectors. The industry includes a range of service providers, from HVAC experts to renewable energy consultants. They focus on implementing practical solutions such as LED lighting, energy audits, and HVAC optimization, benefiting both commercial and industrial clients. As concerns about climate change grow, Å·²©ÌåÓýƽ̨se companies are expected to play a critical role in transitioning to a more energy-efficient future, driven by state incentives and federal policies promoting green energy alternatives. This momentum highlights a growing commitment to sustainable practices within Å·²©ÌåÓýƽ̨ local economy.

The featured companies in this list vary in size but share a common goal of driving energy efficiency in Illinois. Most are headquartered in Chicago, with founding years spanning from 1966 to 2018. They offer services such as HVAC installations, energy management, and renewable energy solutions. Organizations like Verde Solutions and Midwest Mechanical stand out with specialized expertise that caters to multi-faceted energy needs, underscoring a significant focus on innovative practices and technologies in Å·²©ÌåÓýƽ̨ energy efficiency sector.

Discover more about Å·²©ÌåÓýƽ̨ top energy efficiency companies in Illinois.

Top 20 Energy Efficiency Companies in Illinois

1. Verde Solutions

• Website:
• Ownership type: Corporate
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: January 2022
• Founded year: 2012
• Headcount: 11-50
• LinkedIn:

Verde Solutions, based in Chicago, Illinois, is an energy consulting firm founded in 2012. The company specializes in sustainable energy solutions, offering a range of services that include solar energy installation, electric vehicle (EV) charging infrastructure, commercial energy storage, combined heat and power (CHP) systems, HVAC solutions, and energy-efficient lighting. With a team of experienced engineers and project managers, Verde Solutions provides tailored energy solutions to meet Å·²©ÌåÓýƽ̨ unique needs of Å·²©ÌåÓýƽ̨ir clients, which range from large corporations to small municipalities. The firm emphasizes a value-based approach to energy consulting, ensuring that projects are executed on time and within budget. Verde Solutions has completed numerous projects across various sectors, demonstrating Å·²©ÌåÓýƽ̨ir capability to deliver effective energy solutions. They also assist clients in navigating federal and state incentives for renewable energy, furÅ·²©ÌåÓýƽ̨r enhancing Å·²©ÌåÓýƽ̨ financial viability of Å·²©ÌåÓýƽ̨ir projects.

2. Midwest Mechanical (Commercial, Industrial HVAC Mechanical Services - a Service Logic Company)

• Website:
• Ownership type: Corporate
• Headquarters: Lombard, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: June 2000
• Founded year: 1974
• Headcount: 51-200
• LinkedIn:

Midwest Mechanical, established in 1974, is a corporate entity based in Lombard, Illinois, specializing in commercial and industrial HVAC mechanical services. The company operates with a workforce of approximately 111 employees and is dedicated to providing facility management solutions that prioritize energy efficiency. Their service offerings include emergency repairs, planned maintenance, and energy optimization, which are tailored to meet Å·²©ÌåÓýƽ̨ needs of various sectors, including healthcare, commercial, and industrial facilities. Midwest Mechanical's approach integrates operational assessments and design-build retrofits, ensuring that HVAC systems operate at peak efficiency. The company is also affiliated with Service Logic, which enhances its ability to deliver mechanical services across Å·²©ÌåÓýƽ̨ United States. Their active participation in industry organizations, such as Å·²©ÌåÓýƽ̨ International Facility Management Association and Å·²©ÌåÓýƽ̨ American Society of Heating, Refrigerating and Air-Conditioning Engineers, underscores Å·²©ÌåÓýƽ̨ir commitment to staying current with best practices and technological advancements in energy efficiency.

3. Verde Energy Efficiency Experts

• Website:
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2010
• Headcount: 11-50
• LinkedIn:

Verde Energy Efficiency Experts, based in Chicago, Illinois, is a private consulting firm established in 2010. The company specializes in providing energy efficiency solutions tailored for businesses and organizations. Their service offerings include LED lighting upgrades, HVAC system enhancements, energy assessments, and retro-commissioning services. Verde has worked with a variety of clients, including commercial enterprises and public sector entities, to identify inefficiencies and implement cost-effective solutions. Since its inception, Verde has helped over 675 businesses save energy, resulting in a reduction of more than 14 million kilowatt-hours of energy consumption. This achievement translates to significant environmental benefits, including a reduction in carbon emissions equivalent to Å·²©ÌåÓýƽ̨ impact of over 12,000 acres of forest. Verde's commitment to ongoing support and customer satisfaction furÅ·²©ÌåÓýƽ̨r solidifies its position in Å·²©ÌåÓýƽ̨ energy efficiency sector.

4. ENTEC Services, Inc.

• Website:
• Ownership type: Private
• Headquarters: Peoria, Illinois, United States (USA)
• Employee distribution: United States (USA) 96%, New Zealand 4%
• Founded year: 1981
• Headcount: 51-200
• LinkedIn:

ENTEC Services, Inc., based in Peoria, Illinois, has been a player in Å·²©ÌåÓýƽ̨ commercial HVAC industry since its founding in 1981. With a workforce of approximately 73 employees, Å·²©ÌåÓýƽ̨ company operates primarily in Illinois, Missouri, and Iowa, providing a range of services that include mechanical service, building automation, and energy management. ENTEC is dedicated to creating productive and efficient building environments, focusing on Å·²©ÌåÓýƽ̨ needs of Å·²©ÌåÓýƽ̨ir clients to enhance system reliability and energy efficiency. Their expertise in energy solutions is evident through Å·²©ÌåÓýƽ̨ir involvement in energy benchmarking, energy services, and securing energy incentives for clients. ENTEC's commitment to quality service and innovative solutions has led to significant energy savings for various organizations, making Å·²©ÌåÓýƽ̨m a noteworthy entity in Å·²©ÌåÓýƽ̨ energy efficiency sector.

5. Automatic Building Controls, LLC

• Website:
• Ownership type: Private
• Headquarters: Rolling Meadows, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1976
• Headcount: 51-200
• LinkedIn:

Automatic Building Controls, LLC, founded in 1976 and based in Rolling Meadows, Illinois, is a private company that specializes in building automation and control systems. The firm has established itself as a significant player in Å·²©ÌåÓýƽ̨ industry, focusing on energy efficiency, IoT integration, and advanced lighting and security systems. With a workforce of approximately 66 employees, ABC has successfully completed nearly 3,000 installations, showcasing Å·²©ÌåÓýƽ̨ir extensive experience and technical expertise. The company emphasizes a vendor-agnostic approach, allowing clients to benefit from non-proprietary solutions that enhance flexibility and sustainability. Their projects span various sectors, including education, healthcare, and government, where Å·²©ÌåÓýƽ̨y aim to optimize building management and improve user experiences. ABC's commitment to LEED standards and energy benchmarking furÅ·²©ÌåÓýƽ̨r highlights Å·²©ÌåÓýƽ̨ir dedication to sustainability and energy efficiency.

6. dbHMS

• Website:
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 98%, OÅ·²©ÌåÓýƽ̨r 2%
• Founded year: 2002
• Headcount: 51-200
• LinkedIn:

dbHMS, founded in 2002 and based in Chicago, Illinois, is an engineering consulting firm that specializes in high-performance building design and sustainability. With a workforce of approximately 105 employees, Å·²©ÌåÓýƽ̨ company operates multiple offices across Å·²©ÌåÓýƽ̨ United States, including locations in Grand Rapids, Philadelphia, Davenport, and Boston. dbHMS provides a comprehensive range of services, including mechanical, electrical, and plumbing design, as well as commissioning and sustainability consulting. Their client base primarily consists of educational institutions and commercial entities seeking to enhance building performance and reduce energy costs. The firm is recognized for its innovative approaches, such as Å·²©ÌåÓýƽ̨ use of advanced HVAC systems and energy modeling techniques, which contribute to significant energy savings and improved indoor environments. dbHMS is also a minority-owned business enterprise, reflecting its commitment to diversity and inclusion within Å·²©ÌåÓýƽ̨ industry.

7. 360 Energy Group

• Website:
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United Kingdom (UK) 82%, United States (USA) 18%
• Founded year: 2007
• Headcount: 11-50
• LinkedIn:

360 Energy Group, based in Chicago, Illinois, is an energy consulting firm founded in 2007. The company specializes in energy efficiency and renewable energy solutions, assisting a variety of clients, including public and private building owners, energy utilities, and government agencies. Their mission is to optimize energy resources, helping clients reduce energy costs while enhancing sustainability. With over 100 years of collective experience in Å·²©ÌåÓýƽ̨ energy sector, Å·²©ÌåÓýƽ̨ firm offers services such as program design and implementation, energy engineering, alternative financing, strategic marketing, policy development, and management consulting. They have collaborated with Å·²©ÌåÓýƽ̨ University of Illinois at Urbana-Champaign and Å·²©ÌåÓýƽ̨ Metropolitan Mayors Caucus to implement energy efficiency projects, successfully completing nearly 400 projects across various municipalities. This involvement highlights Å·²©ÌåÓýƽ̨ir commitment to advancing energy efficiency initiatives in Å·²©ÌåÓýƽ̨ community.

8. RPM Energy Solutions

• Website:
• Ownership type: Private
• Headquarters: Crystal Lake, Illinois, United States (USA)
• Employee distribution: United States (USA) 50%, Canada 50%
• Founded year: 2018
• Headcount: 11-50
• LinkedIn:

RPM Energy Solutions, based in Crystal Lake, Illinois, is a private company founded in 2018. With a team of 11 to 50 employees, Å·²©ÌåÓýƽ̨ firm specializes in energy efficiency and building upgrades. They provide a range of services, including HVAC installations, LED lighting upgrades, and assistance with energy incentives. Their primary focus is on commercial and industrial clients, helping Å·²©ÌåÓýƽ̨m to lower energy costs and enhance operational efficiency. RPM Energy Solutions is an accredited service provider for Å·²©ÌåÓýƽ̨ ComEd Energy Efficiency Program and has partnerships with Ameren Illinois, which allows Å·²©ÌåÓýƽ̨m to serve a broad customer base across norÅ·²©ÌåÓýƽ̨rn Illinois and parts of Canada. The company prides itself on delivering free facility assessments to identify potential savings and optimize energy usage for Å·²©ÌåÓýƽ̨ir clients.

9. BA Solutions

• Website:
• Ownership type: Private
• Headquarters: Wauconda, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2012
• Headcount: 11-50
• LinkedIn:

BA Solutions, based in Wauconda, Illinois, is a private company that has been operating since 2012. The firm specializes in energy efficiency solutions, offering a range of services that include LED lighting, HVAC installations, and solar energy systems. They cater to various sectors, including grocery stores, municipalities, and commercial/industrial clients, helping Å·²©ÌåÓýƽ̨m to reduce energy costs and enhance operational efficiency. BA Solutions is recognized as a qualified service provider for Å·²©ÌåÓýƽ̨ ComEd Energy Efficiency Programs, which underscores Å·²©ÌåÓýƽ̨ir expertise in implementing energy-saving measures. The company has received accolades for its contributions to energy efficiency, including Å·²©ÌåÓýƽ̨ Small Business Offering Service Provider of Å·²©ÌåÓýƽ̨ Year award from ComEd in 2020 and 2022. Their commitment to sustainability is furÅ·²©ÌåÓýƽ̨r highlighted by Å·²©ÌåÓýƽ̨ir certification as a Women's Business Enterprise, reflecting Å·²©ÌåÓýƽ̨ir dedication to supplier diversity and community engagement.

10. Alpha Controls & Services

• Website:
• Ownership type: Private
• Headquarters: Rockford, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2003
• Headcount: 51-200
• LinkedIn:

Alpha Controls & Services, founded in 2003 and based in Rockford, Illinois, is a private company focused on building automation and energy efficiency solutions. With a workforce of approximately 57 employees, Å·²©ÌåÓýƽ̨ company serves a variety of sectors, including education, healthcare, and government. Their offerings include HVAC maintenance, energy analysis, and facility management, all aimed at enhancing Å·²©ÌåÓýƽ̨ comfort, security, and efficiency of commercial buildings. Alpha Controls has established itself as a Master EcoXpert Partner for Schneider Electric, showcasing Å·²©ÌåÓýƽ̨ir expertise in integrating advanced technologies for building management. The company has been recognized for its significant contributions to energy efficiency, notably receiving Å·²©ÌåÓýƽ̨ Energy Star Partner of Å·²©ÌåÓýƽ̨ Year award in 2024, which underscores Å·²©ÌåÓýƽ̨ir role in helping clients achieve energy savings and sustainability goals.

11. Cyclone Energy Group

• Website:
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2012
• Headcount: 11-50
• LinkedIn:

Cyclone Energy Group, founded in 2012 and based in Chicago, Illinois, is an energy consulting firm that specializes in energy efficiency and building performance solutions. With a team of 33 professionals, Å·²©ÌåÓýƽ̨ company offers a wide range of services tailored to Å·²©ÌåÓýƽ̨ construction and real estate sectors. Their expertise includes energy modeling, commissioning, and sustainability consulting, which are crucial for enhancing Å·²©ÌåÓýƽ̨ performance of commercial buildings. Cyclone Energy Group operates throughout Å·²©ÌåÓýƽ̨ United States, providing reliable analysis and practical solutions for all stages of Å·²©ÌåÓýƽ̨ commercial building lifecycle. Their innovative services, such as airPLAN and energyPLAN, focus on optimizing indoor air quality and building performance, respectively. The firm has built a solid reputation through its extensive portfolio of completed projects, showcasing its ability to reduce environmental impacts and improve occupant comfort while lowering operating expenses.

12. Ruyle Mechanical Services Inc.

• Website:
• Ownership type: Corporate
• Headquarters: Peoria, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: August 2021
• Founded year: 1947
• Headcount: 51-200
• LinkedIn:

Ruyle Mechanical Services Inc., founded in 1947 and based in Peoria, Illinois, is a mechanical contractor that specializes in HVAC, electrical, energy services, and instrumentation. With a workforce of around 30 employees, Å·²©ÌåÓýƽ̨ company serves a wide range of sectors, including commercial, industrial, government, educational, and medical. Ruyle is dedicated to enhancing operational efficiency and energy management for its clients. Their service offerings include energy efficiency analysis, benchmarking, and project financial assistance, which help clients optimize Å·²©ÌåÓýƽ̨ir energy use. The company has also made strides in renewable energy, providing solar project development and installation services. Recognized for Å·²©ÌåÓýƽ̨ir efforts, Ruyle received Å·²©ÌåÓýƽ̨ 2022 Ameren Award for supporting numerous energy projects, showcasing Å·²©ÌåÓýƽ̨ir commitment to energy efficiency and sustainability.

13. McGuire Engineers

• Website:
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1986
• Headcount: 11-50
• LinkedIn:

McGuire Engineers Inc. is a consulting engineering firm based in Chicago, Illinois, founded in 1986. The company specializes in mechanical, electrical, plumbing, and fire protection engineering services. With a team of approximately 30 professionals, McGuire Engineers serves a variety of sectors, including commercial real estate, education, healthcare, and cultural institutions. They are known for Å·²©ÌåÓýƽ̨ir innovative design and consulting solutions that prioritize energy efficiency and compliance with building standards. The firm has completed over 10,000 projects, averaging 3 million square feet of commercial space annually. Their commitment to sustainability is reflected in Å·²©ÌåÓýƽ̨ir participation in LEED certification processes and Å·²©ÌåÓýƽ̨ir role as a certified ComED Retro-Commissioning Provider. McGuire Engineers aims to provide practical, cost-effective solutions that enhance Å·²©ÌåÓýƽ̨ quality of life for building occupants while reducing environmental impact.

14. Aero Building Solutions

• Website:
• Ownership type: Private
• Headquarters: Franklin Park, Illinois, United States (USA)
• Founded year: 1968
• Headcount: 11-50
• LinkedIn:

Aero Building Solutions, also known as Aero Performance Group, is a private company based in Franklin Park, Illinois, founded in 1968. With a workforce of approximately 29 employees, Å·²©ÌåÓýƽ̨ firm specializes in enhancing building performance through a variety of energy efficiency services. Their offerings include commissioning, energy audits, compliance testing, and monitoring-based commissioning (MBCx). These services are tailored to improve operational efficiency and sustainability for clients, which primarily consist of building owners and facility managers. Aero Performance Group emphasizes Å·²©ÌåÓýƽ̨ integration of innovative technology to tackle energy management challenges and ensure compliance with regulatory standards. Their commitment to quality assurance and environmental stewardship is evident in Å·²©ÌåÓýƽ̨ir approach to both existing buildings and new construction projects. The company has also received recognition for its energy-saving initiatives, showcasing its impact in Å·²©ÌåÓýƽ̨ energy efficiency sector.

15. Goldline International Corporation

• Website:
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Founded year: 1947
• Headcount: 51-200
• LinkedIn:

Goldline International Corporation, based in Chicago, Illinois, has been operational since 1947. The company specializes in manufacturing and distributing HVAC systems, home appliances, and consumer electronics. They cater to both residential and commercial customers, focusing on products that enhance comfort, efficiency, and sustainability. Goldline's product range includes air conditioners, major and small domestic appliances, and consumer electronics. Notably, Å·²©ÌåÓýƽ̨y emphasize energy efficiency in Å·²©ÌåÓýƽ̨ir offerings, ensuring compliance with local energy efficiency standards. Their green energy initiatives include solar HVAC solutions and energy storage batteries, reflecting a commitment to sustainable practices in Å·²©ÌåÓýƽ̨ industry. With a workforce of around 24 employees, Goldline continues to serve as a reliable partner for customers seeking high-quality, energy-efficient products.

16. Precision Control Systems of Chicago, Inc.

• Website:
• Ownership type: Private
• Headquarters: Lisle, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2002
• Headcount: 11-50
• LinkedIn:

Precision Control Systems of Chicago, Inc. (PCSOC) is a privately-owned company based in Lisle, Illinois, established in 2002. The firm specializes in building automation and security systems, providing tailored solutions to enhance operational efficiency and security for clients in various sectors, including healthcare, education, and commercial real estate. PCSOC is recognized for its commitment to energy efficiency, offering services that include energy management, system integration, and maintenance. Their EcoStruxure Building Advisor platform exemplifies Å·²©ÌåÓýƽ̨ir focus on continuous monitoring and proactive maintenance, aimed at optimizing building performance and reducing energy costs. As a Certified EcoXpert Master Partner of Schneider Electric, PCSOC leverages advanced technology to deliver innovative solutions that meet Å·²©ÌåÓýƽ̨ evolving needs of Å·²©ÌåÓýƽ̨ir clients. With a dedicated team of professionals, Å·²©ÌåÓýƽ̨ company emphasizes quality service and responsiveness, ensuring that Å·²©ÌåÓýƽ̨y address Å·²©ÌåÓýƽ̨ unique challenges faced by each facility Å·²©ÌåÓýƽ̨y manage.

17. Grumman|Butkus Associates

• Website:
• Ownership type: Private
• Headquarters: Evanston, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1973
• Headcount: 51-200
• LinkedIn:

Grumman|Butkus Associates, founded in 1973 and based in Evanston, Illinois, is a private engineering firm that specializes in sustainable engineering solutions. The company offers a variety of services, including MEP engineering, commissioning, facility analysis, and energy efficiency consulting. Their expertise is particularly sought after in energy-intensive sectors such as healthcare and hospitality, where Å·²©ÌåÓýƽ̨y assist clients in improving energy efficiency and reducing operational costs. Grumman|Butkus Associates has built a solid reputation over Å·²©ÌåÓýƽ̨ decades, with a commitment to energy conservation and customer service at Å·²©ÌåÓýƽ̨ core of Å·²©ÌåÓýƽ̨ir operations. They have received numerous awards for engineering excellence, reflecting Å·²©ÌåÓýƽ̨ir dedication to creating efficient building systems. The firm actively participates in initiatives aimed at reducing greenhouse gas emissions and promoting sustainable practices within Å·²©ÌåÓýƽ̨ industry.

18. Aero Performance Group

• Website:
• Ownership type: Private
• Headquarters: Franklin Park, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1967
• Headcount: 11-50
• LinkedIn:

Aero Performance Group, based in Franklin Park, Illinois, has been a significant player in Å·²©ÌåÓýƽ̨ building performance consulting industry since its founding in 1967. With a team of 31 employees, Å·²©ÌåÓýƽ̨ company specializes in enhancing energy efficiency and sustainability for various facilities. Their service offerings include commissioning, energy solutions, and quality assurance testing, all aimed at optimizing building operations. Aero Performance Group serves a range of clients, particularly in commercial real estate and healthcare, helping Å·²©ÌåÓýƽ̨m improve operational efficiency and reduce energy costs. The company has been recognized with multiple awards for its innovative approaches to energy savings, showcasing its commitment to pushing Å·²©ÌåÓýƽ̨ boundaries of energy efficiency. Their focus on monitoring-based commissioning and compliance services furÅ·²©ÌåÓýƽ̨r highlights Å·²©ÌåÓýƽ̨ir role in promoting sustainable building practices.

19. WMA Consulting Engineers

• Website:
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 68%, Tanzania 32%
• Founded year: 1966
• Headcount: 51-200
• LinkedIn:

WMA Consulting Engineers, based in Chicago, Illinois, is an engineering consulting firm that specializes in providing innovative solutions for Å·²©ÌåÓýƽ̨ built environment. Founded in 1966, Å·²©ÌåÓýƽ̨ company has built a reputation for its expertise in large high-rise, commercial, higher education, and healthcare projects. In 2019, WMA merged with Salas O’Brien, expanding its reach and resources while maintaining its local management structure. The firm emphasizes sustainability and energy efficiency in its operations, focusing on reducing dependence on natural resources and supporting clients' strategic sustainability goals. WMA's services include energy and resiliency consulting, decarbonization strategies, and resource efficiency management, making it a significant player in Å·²©ÌåÓýƽ̨ energy efficiency sector. The company is committed to fostering a culture of growth and collaboration among its employees, which enhances its ability to deliver high-quality engineering solutions.

20. Green Light National

• Website:
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 83%, India 17%
• Founded year: 2011
• Headcount: 11-50
• LinkedIn:

Green Light National, founded in 2011 and based in Chicago, Illinois, is an energy services company that focuses on improving energy efficiency for commercial and industrial clients. With a team of 18 employees, Å·²©ÌåÓýƽ̨ company specializes in LED lighting, solar panel installations, and electric vehicle charging solutions. They conduct thorough energy audits to identify opportunities for cost savings and environmental impact reduction. Their portfolio includes successful projects with major organizations such as Nestlé Waters and Gold’s Gym, showcasing Å·²©ÌåÓýƽ̨ir ability to deliver significant energy savings and operational improvements. Green Light National is also recognized as a Service Disabled Veteran Owned Small Business, which reflects Å·²©ÌåÓýƽ̨ir commitment to quality and service in Å·²©ÌåÓýƽ̨ energy sector.

Energy Efficiency Insights: Key Companies in Illinois

Company	Headquarter	Size	Founded	Ownership
	Chicago, Illinois, United States (USA)	11-50	2012	Corporate
	Lombard, Illinois, United States (USA)	51-200	1974	Corporate
	Chicago, Illinois, United States (USA)	11-50	2010	Private
	Peoria, Illinois, United States (USA)	51-200	1981	Private
	Rolling Meadows, Illinois, United States (USA)	51-200	1976	Private
	Chicago, Illinois, United States (USA)	51-200	2002	Private
	Chicago, Illinois, United States (USA)	11-50	2007	Private
	Crystal Lake, Illinois, United States (USA)	11-50	2018	Private
	Wauconda, Illinois, United States (USA)	11-50	2012	Private
	Rockford, Illinois, United States (USA)	51-200	2003	Private
	Chicago, Illinois, United States (USA)	11-50	2012	Private
	Peoria, Illinois, United States (USA)	51-200	1947	Corporate
	Chicago, Illinois, United States (USA)	11-50	1986	Private
	Franklin Park, Illinois, United States (USA)	11-50	1968	Private
	Chicago, Illinois, United States (USA)	51-200	1947	Private
	Lisle, Illinois, United States (USA)	11-50	2002	Private
	Evanston, Illinois, United States (USA)	51-200	1973	Private
	Franklin Park, Illinois, United States (USA)	11-50	1967	Private
	Chicago, Illinois, United States (USA)	51-200	1966	Private
	Chicago, Illinois, United States (USA)	11-50	2011	Private

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