Illinois Top Companies List by Market Cap as of August 2026

Illinois Top Companies List by Market Cap as on August 2026. Biggest Illinois Companies List by Market Cap in August 2026. Illinois Largest Companies in August 2026.

Illinois Top Companies by Market Cap in 2026
Illinois Top Companies by Market Cap in 2026, Illinois Largest Companies in 2026, Biggest Illinois Companies by Market Cap.

  1. RLI Corp

    World Rank (Aug-2026)
    3,250
    Market Cap (Aug-2026)
    5.852 Billion USD
    World Rank (Jan-05-2024)
    2,469
    Market Cap (Jan-05-2024)
    6.191 Billion USD
    World Rank (Jul-30-2023)
    2,463
    Market Cap (Jul-30-2023)
    6.213 Billion USD
    World Rank (Dec-25-2022)
    2,316
    Market Cap (Dec-25-2022)
    6.067 Billion USD
    World Rank (Jan-07-2022)
    3,238
    Market Cap (Jan-07-2022)
    5.09 Billion USD
    Annual Revenue in USD
    1,882 Million USD
    Annual Net Income in USD
    403 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    RLI is a Insurance company. It is offering products for underserved specialty markets or enhancing and developing products that are new to the marketplace. The company operate in all 50 states from locations across the country with a diversified portfolio of property and casualty coverages and surety bonds. The headquarters is in USA.

    Company Website
    RLI CORP

  2. AAR Corp.

    World Rank (Aug-2026)
    3,254
    Market Cap (Aug-2026)
    5.848 Billion USD
    World Rank (Jan-05-2024)
    5,410
    Market Cap (Jan-05-2024)
    2.172 Billion USD
    World Rank (Jul-30-2023)
    5,668
    Market Cap (Jul-30-2023)
    2.037 Billion USD
    World Rank (Dec-25-2022)
    6,611
    Market Cap (Dec-25-2022)
    1.478 Billion USD
    World Rank (Jan-07-2022)
    7,499
    Market Cap (Jan-07-2022)
    1.48 Billion USD
    Annual Revenue in USD
    3,308 Million USD
    Annual Net Income in USD
    188 Million USD
    Annual Results for Period Ending
    For year ending May-2026
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile
    AAR Corp is a Provider of Aviation (business sector dedicated to manufacturing and operating all types of aircraft) Services to Commercial and Government customers worldwide. The company aftermarket expertise and award winning solutions help customers increase efficiency and reduce costs while maintaining high levels of quality, service and safety. The headquarters is in USA.
    Company Website
    AAR CORP
    Wikipedia
    Wikipedia

  3. CDK Global

    World Rank (Aug-2026)
    3,275
    World Rank (Jan-05-2024)
    3,275
    World Rank (Jul-30-2023)
    3,275
    World Rank (Dec-25-2022)
    3,275
    World Rank (Jan-07-2022)
    3,275
    Market Cap (Jan-07-2022)
    5.02 Billion USD
    Annual Revenue in USD
    1,673 Million USD
    Annual Operating Income in USD
    425 Million USD
    Annual Net Income in USD
    1,034 Million USD
    Annual Results for Period Ending
    For year ending June-2021
    Headquarters Country
    USA
    Company Profile

    CDK Global is a Business Services and Dealer Management System company. It provide integrated technology solutions to approximately 30,000 Auto, Truck, Motorcycle, Marine, Recreational and Heavy Equipment dealers around the world. The company Services are tax and benefits administration solutions from a single source, human resource and payroll. The headquarters is in USA.

    Company Website
    CDK GLOBAL INC

  4. Fortune Brands Innovations Inc.

    World Rank (Aug-2026)
    3,315
    Market Cap (Aug-2026)
    5.711 Billion USD
    World Rank (Jan-05-2024)
    1,754
    Market Cap (Jan-05-2024)
    9.350 Billion USD
    World Rank (Jul-30-2023)
    1,814
    Market Cap (Jul-30-2023)
    9.089 Billion USD
    World Rank (Dec-25-2022)
    1,981
    Market Cap (Dec-25-2022)
    7.275 Billion USD
    World Rank (Jan-07-2022)
    1,461
    Market Cap (Jan-07-2022)
    13.75 Billion USD
    Annual Revenue in USD
    4,463 Million USD
    Annual Operating Income in USD
    516 Million USD
    Annual Net Income in USD
    299 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    CEO
    Nicholas Fink
    Company Profile

    Fortune Brands Innovations, Inc. provides water, outdoor, and security products, including water management, connected products, outdoor living, material conversion, sustainability, safety, and wellness. The company's portfolio of brands comprising Moen, House of Rohl, Aqualisa, Therma-Tru, Larson, Fiberon, Master Lock, and SentrySafe. Fortune Brands is a Fortune 500 company. Headquarters is in USA.

    FORTUNE BRANDS HOME & SECURITY renamed its company name to FORTUNE BRANDS INNOVATIONS.

    Company Website
    FORTUNE BRANDS INNOVATIONS, INC.
    Wikipedia
    Wikipedia

  5. Reynolds Consumer Products Inc.

    World Rank (Aug-2026)
    3,380
    Market Cap (Aug-2026)
    5.533 Billion USD
    World Rank (Jan-05-2024)
    2,663
    Market Cap (Jan-05-2024)
    5.651 Billion USD
    World Rank (Jul-30-2023)
    2,613
    Market Cap (Jul-30-2023)
    5.796 Billion USD
    World Rank (Dec-25-2022)
    2,212
    Market Cap (Dec-25-2022)
    6.376 Billion USD
    World Rank (Jan-07-2022)
    2,583
    Market Cap (Jan-07-2022)
    6.73 Billion USD
    Annual Revenue in USD
    3,721 Million USD
    Annual Net Income in USD
    301 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ Nasdaq
    Company Profile

    Reynolds Consumer Products is a Leading Provider of Household Products company. It brand products help make mealtime easier with preparation, cooking, clean-up and storage solutions. The company annual revenue is 3,817 million USD and 6,000 employees as on 2022. The headquarters is in USA.

    Company Website
    REYNOLDS CONSUMER PRODUCTS INC.

  6. Brunswick Corporation

    World Rank (Aug-2026)
    3,449
    Market Cap (Aug-2026)
    5.357 Billion USD
    World Rank (Jan-05-2024)
    2,468
    Market Cap (Jan-05-2024)
    6.192 Billion USD
    World Rank (Jul-30-2023)
    2,510
    Market Cap (Jul-30-2023)
    6.049 Billion USD
    World Rank (Dec-25-2022)
    2,648
    Market Cap (Dec-25-2022)
    5.180 Billion USD
    World Rank (Jan-07-2022)
    2,319
    Market Cap (Jan-07-2022)
    7.73 Billion USD
    Annual Revenue in USD
    5,363 Million USD
    Annual Operating Income in USD
    -41 Million USD
    Annual Net Income in USD
    -137 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    Brunswick Corporation is dedicated to defining, creating and continuously innovating the future of the Recreational Marine Market company. It has operations in 24 countries and serves customers in over 170 markets. The headquarters is in USA.

    Company Website
    BRUNSWICK CORPORATION
    Wikipedia
    Wikipedia

  7. Middleby Corporation

    World Rank (Aug-2026)
    3,464
    Market Cap (Aug-2026)
    5.332 Billion USD
    World Rank (Jan-05-2024)
    2,114
    Market Cap (Jan-05-2024)
    7.509 Billion USD
    World Rank (Jul-30-2023)
    1,978
    Market Cap (Jul-30-2023)
    8.114 Billion USD
    World Rank (Dec-25-2022)
    2,019
    Market Cap (Dec-25-2022)
    7.124 Billion USD
    World Rank (Jan-07-2022)
    1,747
    Market Cap (Jan-07-2022)
    10.98 Billion USD
    Annual Revenue in USD
    3,201 Million USD
    Annual Operating Income in USD
    575 Million USD
    Annual Net Income in USD
    -278 Million USD
    Annual Results for Period Ending
    For year ending January-2026
    Headquarters Country
    USA
    Yahoo @ Nasdaq
    Company Profile

    Middleby Corporation is a Commercial and Residential Cooking company. The company operates in three segments they are commercial cooking, industrial baking and processing and residential appliances. The headquarters is in USA.

    Company Website
    THE MIDDLEBY CORPORATION
    Wikipedia
    Wikipedia

  8. MYR Group

    World Rank (Aug-2026)
    3,523
    Market Cap (Aug-2026)
    5.206 Billion USD
    World Rank (Jan-05-2024)
    5,129
    Market Cap (Jan-05-2024)
    2.362 Billion USD
    World Rank (Jul-30-2023)
    5,075
    Market Cap (Jul-30-2023)
    2.414 Billion USD
    World Rank (Dec-25-2022)
    6,562
    Market Cap (Dec-25-2022)
    1.498 Billion USD
    World Rank (Jan-07-2022)
    6,892
    Market Cap (Jan-07-2022)
    1.72 Billion USD
    Annual Revenue in USD
    3,658 Million USD
    Annual Operating Income in USD
    167 Million USD
    Annual Net Income in USD
    118 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ Frankfurt
    Company Profile

    MYR Group is a national electrical contractor specializing in transmission and distribution, substation and commercial and industrial construction company. The headquarters is in USA.

    Facts About Company

    MYR Group Annual Total Revenue for year ending Dec-2022 was 3,008 million USD and and Net Income for year ending Dec-2022 was 83 million USD.

    MYR Group Annual Total Revenue for year ending Dec-2021 was 2,498 million USD and and Net Income for year ending Dec-2021 was 85 million USD.

    As on 2022, MYR Group had 8,500 employees.

    Company Website
    MYR GROUP

  9. Century Aluminum Company

    World Rank (Aug-2026)
    3,816
    Market Cap (Aug-2026)
    4.625 Billion USD
    World Rank (Jan-05-2024)
    8,533
    Market Cap (Jan-05-2024)
    1.008 Billion USD
    World Rank (Jul-30-2023)
    9,661
    Market Cap (Jul-30-2023)
    0.838 Billion USD
    World Rank (Dec-25-2022)
    10,192
    Market Cap (Dec-25-2022)
    0.720 Billion USD
    World Rank (Jan-07-2022)
    7,245
    Market Cap (Jan-07-2022)
    1.58 Billion USD
    Annual Revenue in USD
    2,528 Million USD
    Annual Operating Income in USD
    158 Million USD
    Annual Net Income in USD
    42 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ Nasdaq
    Company Profile
    Aluminium company with headquarters is in Illinois, USA.
    Company Website
    CENTURY ALUMINUM COMPANY

  10. Adtalem Global Education

    World Rank (Aug-2026)
    3,882
    Market Cap (Aug-2026)
    4.510 Billion USD
    World Rank (Jan-05-2024)
    5,110
    Market Cap (Jan-05-2024)
    2.374 Billion USD
    World Rank (Jul-30-2023)
    5,979
    Market Cap (Jul-30-2023)
    1.872 Billion USD
    World Rank (Dec-25-2022)
    6,171
    Market Cap (Dec-25-2022)
    1.642 Billion USD
    World Rank (Jan-07-2022)
    7,420
    Market Cap (Jan-07-2022)
    1.50 Billion USD
    Annual Revenue in USD
    1,954 Million USD
    Annual Operating Income in USD
    383 Million USD
    Annual Net Income in USD
    252 Million USD
    Annual Results for Period Ending
    For year ending June-2026
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile
    Adtalem Global Education is a Online Healthcare Education company. It is providing comprehensive workforce solutions to employers through proven learning modalities with superior academic outcomes. The company have 26 campuses across 15 states and 4 countries, 6,100 dedicated faculty members and more than 90,000 enrolled students. The headquarters is in USA.
    Company Website
    ADTALEM GLOBAL EDUCATION INC

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