# List of subscription businesses in Illinois

Tamtam tracks 160 subscription businesses headquartered in Illinois. This list ranks the 50 largest by number of employees on LinkedIn, led by Health Care Service Corporation, Exelon and Morningstar. Their median headcount is 1,297. Half of them were founded in 1988 or later. The most common headquarters are Chicago (31), Schaumburg (4) and Itasca (3).

These Illinois-based subscription businesses include large enterprises and mid-sized firms across diverse sectors. Health Care Service Corporation provides health coverage, while Exelon is a utility company. Morningstar offers investment insights and data, and Camping World retails RVs and accessories. Paylocity delivers cloud-based HR and payroll software, and Cision specializes in media intelligence.

The data reveals a strong concentration of headquarters in Chicago, with the majority of the largest companies based in the city. The companies span industries such as healthcare, utilities, financial services, retail, and a notable presence of software development firms.

🇺🇸 Illinois · 50 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Health Care Service Corporation](https://www.tamtam.ai/c/health-care-service-corporation) (hcsc.com)<br>Provides health coverage for employers, individuals, and families, including Medicare and Medicaid plans, plus related health care products and services. | Hospitals and Health Care | 🇺🇸 Chicago | 21,090 | 1936 |
| 2 | [Exelon](https://www.tamtam.ai/c/exelon) (exeloncorp.com)<br>A leading utility company providing reliable and affordable energy to over 10 million customers in urban areas across multiple states, with a commitment to sustainability and community support | Utilities | 🇺🇸 Chicago | 20,291 |  |
| 3 | [Morningstar](https://www.tamtam.ai/c/morningstar) (morningstar.com)<br>Independent investment insights, data, and research for various global markets including managed products, private capital, debt securities, and comprehensive asset management services. | Financial Services | 🇺🇸 Chicago | 12,028 | 1984 |
| 4 | [Camping World](https://www.tamtam.ai/c/camping-world) (campingworld.com)<br>A nationwide retailer offering RVs, accessories, services, and expert advice to enhance RV and outdoor experiences since 1966 | Retail | 🇺🇸 Lincolnshire | 7,755 | 1966 |
| 5 | [Paylocity](https://www.tamtam.ai/c/paylocity) (paylocity.com)<br>Award-winning provider of cloud-based HR and payroll software solutions, helping businesses automate processes, attract talent, and build employee connections | Software Development | 🇺🇸 Schaumburg | 7,046 | 1997 |
| 6 | [Cision](https://www.tamtam.ai/c/cision) (cision.com)<br>A global leader in media intelligence and communication solutions, equipping professionals with tools to excel in today's data-driven world | Public Relations and Communications Services | 🇺🇸 Chicago | 3,839 |  |
| 7 | [Cooper's Hawk Winery and Restaurants](https://www.tamtam.ai/c/cooper-s-hawk-winery-and-restaurants) (chwinery.com)<br>An elegant tasting room and scratch kitchen restaurant chain with a large wine club, multiple locations, award-winning wines, and celebrity partnerships | Food and Beverage Services | 🇺🇸 Downers Grove | 3,605 | 2005 |
| 8 | [Applied Systems](https://www.tamtam.ai/c/applied-systems) (www1.appliedsystems.com)<br>A leading provider of innovative cloud software for the insurance industry, driving transformation through digitization, automation, and new partnerships | Software Development | 🇺🇸 Chicago | 2,813 | 1983 |
| 9 | [Chamberlain Group](https://www.tamtam.ai/c/chamberlain-group) (chamberlaingroup.com)<br>A global leader in intelligent access technology, providing seamless, secure access to homes and businesses through innovative products and software solutions | Software Development | 🇺🇸 Oak Brook | 2,781 | 1954 |
| 10 | [Home Chef](https://www.tamtam.ai/c/home-chef) (homechef.com)<br>Innovative meal kit company fostering autonomy, creativity, and growth for employees Award-winning team focused on customer satisfaction and fun work environment | Food and Beverage Services | 🇺🇸 Chicago | 2,766 |  |
| 11 | [American Marketing Association](https://www.tamtam.ai/c/american-marketing-association) (ama.org)<br>Provides marketing and sales professionals with industry insights, professional certification, academic journals, training, and conferences through a global community. | Non-profit Organizations | 🇺🇸 Chicago | 2,669 | 1937 |
| 12 | [CCC Intelligent Solutions](https://www.tamtam.ai/c/ccc-intelligent-solutions) (cccis.com)<br>Cloud platform delivering AI-driven solutions connecting insurers, repairers, automakers, and suppliers for optimized insurance and claims experiences. | Software Development | 🇺🇸 Chicago | 2,417 |  |
| 13 | [Flexera](https://www.tamtam.ai/c/flexera) (flexera.com)<br>Provides comprehensive visibility and actionable insights on entire IT ecosystems, enabling organizations to optimize spend, mitigate risk, and achieve positive business outcomes. | Software Development | 🇺🇸 Itasca | 2,096 | 2008 |
| 14 | [Society of Women Engineers](https://www.tamtam.ai/c/society-of-women-engineers) (linktr.ee)<br>A not-for-profit organization empowering women in engineering through training, scholarships, networking, and advocacy to advance in the field | Non-profit Organizations | 🇺🇸 Il | 1,881 | 1950 |
| 15 | [Relativity](https://www.tamtam.ai/c/relativity) (relativity.com)<br>A software company offering RelativityOne, a SaaS product for data organization, truth discovery, and action during litigation and investigations in various sectors globally | Software Development | 🇺🇸 Chicago | 1,856 |  |
| 16 | [Sprout Social, Inc.](https://www.tamtam.ai/c/sprout-social-inc) (sproutsocial.com)<br>Global leader providing social media management, publishing, engagement, customer care, advocacy, and AI-powered business intelligence software to over thirty thousand brands worldwide. | Software Development | 🇺🇸 Chicago | 1,771 | 2010 |
| 17 | [American College of Surgeons](https://www.tamtam.ai/c/american-college-of-surgeons) (facs.org)<br>Dedicated to improving surgical patient care worldwide with membership opportunities, quality programs, surgical registries, and education to enhance outcomes | Non-profit Organizations | 🇺🇸 Chicago | 1,644 | 1913 |
| 18 | [American Dental Association](https://www.tamtam.ai/c/american-dental-association) (ada.org)<br>Advocates for dentists, dental science, public oral health. Provides resources for professionals, researches, and champions public health initiatives. | Non-profit Organizations | 🇺🇸 Chicago | 1,599 | 1859 |
| 19 | [Litera](https://www.tamtam.ai/c/litera) (litera.com)<br>It specializes in legal technology, offering AI-driven solutions for document management, due diligence, and collaboration for legal teams globally. | Artificial Intelligence | 🇺🇸 Chicago | 1,535 |  |
| 20 | [G2](https://www.tamtam.ai/c/g2) (g2.com)<br>The company is a leading software marketplace that provides authentic peer reviews to help millions of people make smarter software decisions | Technology, Information and Internet | 🇺🇸 Chicago | 1,509 | 2012 |
| 21 | [Sphera](https://www.tamtam.ai/c/sphera) (sphera.com)<br>Sphera provides ESG performance and risk management software, data, and consulting services for EHS&S, operational risk, product stewardship, and SCRM | IT Services and IT Consulting | 🇺🇸 Chicago | 1,448 | 2016 |
| 22 | [Trading Technologies](https://www.tamtam.ai/c/trading-technologies) (tradingtechnologies.com)<br>Provider of SaaS trading platform connecting global exchanges, offering tools for execution, risk management, analytics, and post-trade services. | Software Development | 🇺🇸 Chicago | 1,428 | 1994 |
| 23 | [Protection 1 Security Solutions](https://www.tamtam.ai/c/protection-1-security-solutions) (protection1.com)<br>A leading company in the electronic security industry, formed through a merger, on the way to complete integration and becoming unified | Security and Investigations | 🇺🇸 Romeoville | 1,399 | 1988 |
| 24 | [ISACA](https://www.tamtam.ai/c/isaca) (isaca.org)<br>A global association advocating for professionals in information security, risk management, and governance through certifications, standards, and knowledge sharing | Industry Associations | 🇺🇸 Schaumburg | 1,378 | 1969 |
| 25 | [College of American Pathologists (CAP)](https://www.tamtam.ai/c/college-of-american-pathologists-cap) (cap.org)<br>An organization of pathologists dedicated to excellence in pathology and laboratory medicine, advocating for health advancements and shaping the future of healthcare | Hospitals and Health Care | 🇺🇸 Northfield | 1,297 | 1947 |
| 26 | [iManage](https://www.tamtam.ai/c/imanage) (imanage.com)<br>The company provides an intelligent, cloud-enabled knowledge work platform using AI to uncover and activate organizational content for informed decisions and collaboration | Software Development | 🇺🇸 Chicago | 1,276 | 2015 |
| 27 | [PreSales Collective](https://www.tamtam.ai/c/presales-collective) (presalescollective.com)<br>The company aims to elevate the role of PreSales globally by providing resources, knowledge, networking, and mentorship for career development in PreSales | Think Tanks | 🇺🇸 Chicago | 1,202 | 2020 |
| 28 | [American Academy of Pediatrics](https://www.tamtam.ai/c/american-academy-of-pediatrics) (aap.org)<br>A professional membership organization of pediatricians dedicated to promoting the health and well-being of infants, children, adolescents, and young adults through advocacy and education | Non-profit Organizations | 🇺🇸 Itasca | 1,198 | 1930 |
| 29 | [Factor_](https://www.tamtam.ai/c/factor) (factor75.com)<br>This company offers no-nonsense, chef-prepared meals made with ingredients of integrity, expert-approved nutrition, and restaurant-quality cuisine for people on the go | Food and Beverage Services | 🇺🇸 Batavia | 1,140 | 2013 |
| 30 | [Jewel Food Stores](https://www.tamtam.ai/c/jewel-food-stores) (jewelosco.com)<br>A grocery company with a rich history, offering a wide range of products at fair prices with a focus on customer care | Retail Groceries | 🇺🇸 Itasca | 1,130 |  |
| 31 | [West Unified Communications Services](https://www.tamtam.ai/c/west-unified-communications-services) (westuc.com)<br>This company develops cloud-based technology for enterprise collaboration, offering solutions like conferencing, team collaboration, and cloud contact center services | Telecommunications | 🇺🇸 Chicago | 1,068 | 1991 |
| 32 | [Daniels Health](https://www.tamtam.ai/c/daniels-health) (danielshealth.com)<br>A global leader in healthcare innovation, providing safer solutions for medical waste management, with a focus on sustainability and staff safety | Hospitals and Health Care | 🇺🇸 Chicago | 1,064 | 1986 |
| 33 | [Big Ten Network](https://www.tamtam.ai/c/big-ten-network) (linktr.ee)<br>An internationally distributed network covering the Big Ten Conference, providing 24/7 coverage of over 2,300 events for fans and alumni nationwide | Broadcast Media Production and Distribution | 🇺🇸 Chicago | 1,060 | 2007 |
| 34 | [SITE](https://www.tamtam.ai/c/site-chicago) (siteglobal.com)<br>Global organization supporting incentive travel industry, connecting travel to business results with professional development, certification, and business connections for members worldwide | Industry Associations | 🇺🇸 Chicago | 1,049 | 1973 |
| 35 | [XSport Fitness](https://www.tamtam.ai/c/xsport-fitness) (xsportfitness.com)<br>A rapidly expanding fitness chain offering top-of-the-line equipment, personal training, educational programs, dietary supplements, and fitness apparel at various locations | Wellness and Fitness Services | 🇺🇸 Chicago | 1,046 | 1997 |
| 36 | [Origami Risk](https://www.tamtam.ai/c/origami-risk) (origamirisk.com)<br>Innovative provider of integrated risk, compliance, safety, healthcare, and P&C insurance SaaS solutions for various industries worldwide | Software Development | 🇺🇸 Chicago | 1,011 | 2009 |
| 37 | [Modern Healthcare](https://www.tamtam.ai/c/modern-healthcare) (modernhealthcare.com)<br>Leading source of healthcare news, providing in-depth analysis and insights on industry events, trends, and research through various platforms for healthcare executives | Book and Periodical Publishing | 🇺🇸 Chicago | 893 | 1976 |
| 38 | [Teletrac Navman](https://www.tamtam.ai/c/teletrac-navman) (teletracnavman.com)<br>Global industrial technology company offering connected mobility solutions for vehicle and equipment asset management, leveraging AI for operational insights and sustainability | Software Development | 🇺🇸 Northbrook | 858 | 1988 |
| 39 | [ActiveCampaign](https://www.tamtam.ai/c/activecampaign) (activecampaign.com)<br>Customer experience automation platform offering pre-built automations, CRM, email marketing, and integrations for personalized multi-channel customer engagement. | Software Development | 🇺🇸 Chicago | 840 | 2003 |
| 40 | [Chicago Tribune Media Group](https://www.tamtam.ai/c/chicago-tribune-media-group) (chicagotribune.com)<br>Provides diverse media and marketing solutions reaching millions monthly through newspapers, digital platforms, and niche regional publications in Chicago area. | Newspaper Publishing | 🇺🇸 Chicago | 825 | 1847 |
| 41 | [project44](https://www.tamtam.ai/c/project44) (project44.com)<br>Transforms fragmented logistics management into unified intelligence, bringing certainty to global supply chain operations with intelligent transportation, end-to-end visibility, yard management and last mile solutions. | Software Development | 🇺🇸 Chicago | 809 | 2014 |
| 42 | [IPC](https://www.tamtam.ai/c/ipc) (electronics.org)<br>An industry association guiding electronics manufacturing through changes, providing standards, training, research, and advocacy to support global industry success | Non-profit Organizations | 🇺🇸 Bannockburn | 782 | 1957 |
| 43 | [Keeper Security, Inc.](https://www.tamtam.ai/c/keeper-security-inc) (keepersecurity.com)<br>Provides a unified, cloud-native cybersecurity platform protecting users, devices, and infrastructure from cyber attacks with zero-knowledge and zero-trust security. | Software Development | 🇺🇸 Chicago | 772 | 2011 |
| 44 | [Netrix Global](https://www.tamtam.ai/c/netrix-global) (netrixglobal.com)<br>A global provider of cybersecurity, application development, and IT managed services, recognized for its award-winning solutions | IT Services and IT Consulting | 🇺🇸 Bannockburn | 771 | 1989 |
| 45 | [Impact Networking, LLC](https://www.tamtam.ai/c/impact-networking-llc) (impactmybiz.com)<br>Providing expert-driven managed services including IT, cybersecurity, marketing, AI, and digital transformation to help businesses grow and succeed. | IT Services and IT Consulting | 🇺🇸 Lake Forest | 764 | 1999 |
| 46 | [American College of Healthcare Executives](https://www.tamtam.ai/c/american-college-of-healthcare-executives) (ache.org)<br>An organization advancing healthcare leadership excellence through lifelong learning, integrity, diversity, and inclusion, offering valuable knowledge, networking opportunities, and professional development | Non-profit Organizations | 🇺🇸 Chicago | 734 | 1913 |
| 47 | [AVMA (American Veterinary Medical Association)](https://www.tamtam.ai/c/avma-american-veterinary-medical-association) (avma.org)<br>A leading advocate for the veterinary profession, promoting and advancing the needs of veterinarians and animals through advocacy, education, and accreditation programs | Veterinary Services | 🇺🇸 Schaumburg | 705 | 1863 |
| 48 | [HIMSS](https://www.tamtam.ai/c/himss) (himss.org)<br>A global non-profit organization advising and transforming the health ecosystem through expertise in innovation, policy, workforce development, research, and analytics | Non-profit Organizations | 🇺🇸 Chicago | 702 |  |
| 49 | [Park Lane Jewelry](https://www.tamtam.ai/c/park-lane-jewelry) (parklanejewelry.com)<br>A direct sales jewelry company founded in 1955, offering quality jewelry with career opportunities for women, weekly pay, and unlimited incentives | Retail Luxury Goods and Jewelry | 🇺🇸 Schaumburg | 695 | 1955 |
| 50 | [Quill](https://www.tamtam.ai/c/quill) (quill.com)<br>The company delivers office supplies to support meaningful work that positively impacts coworkers, clients, and customers, with top-ranked customer service | Retail Office Equipment | 🇺🇸 Lincolnshire | 677 | 1956 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

## More company lists in Illinois

- [The largest companies in Illinois](https://www.tamtam.ai/l/largest-companies-illinois) (4,687)
- [Multinational companies in Illinois](https://www.tamtam.ai/l/multinational-companies-illinois) (831)
- [Manufacturers in Illinois](https://www.tamtam.ai/l/manufacturers-illinois) (528)
- [Education providers in Illinois](https://www.tamtam.ai/l/education-companies-illinois) (370)
- [Financial services firms in Illinois](https://www.tamtam.ai/l/financial-services-firms-illinois) (352)
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- [Companies with in-house R&D in Illinois](https://www.tamtam.ai/l/r-and-d-companies-illinois) (322)
- [Hardware manufacturers in Illinois](https://www.tamtam.ai/l/hardware-companies-illinois) (296)
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- [Retail chains in Illinois](https://www.tamtam.ai/l/retail-chains-illinois) (260)
- [Financial Services companies in Illinois](https://www.tamtam.ai/l/financial-services-companies-illinois) (248)
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## The same list elsewhere in United States

- [Subscription businesses in the United States](https://www.tamtam.ai/l/subscription-businesses-united-states) (3,923)
- [Subscription businesses in California](https://www.tamtam.ai/l/subscription-businesses-california) (940)
- [Subscription businesses in New York State](https://www.tamtam.ai/l/subscription-businesses-new-york-state) (485)
- [Subscription businesses in Texas](https://www.tamtam.ai/l/subscription-businesses-texas) (310)
- [Subscription businesses in Florida](https://www.tamtam.ai/l/subscription-businesses-florida) (202)
- [Subscription businesses in Massachusetts](https://www.tamtam.ai/l/subscription-businesses-massachusetts) (183)
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- [Subscription businesses in Alabama](https://www.tamtam.ai/l/subscription-businesses-alabama) (104)
- [Subscription businesses in Georgia](https://www.tamtam.ai/l/subscription-businesses-georgia) (103)
- [Subscription businesses in Pennsylvania](https://www.tamtam.ai/l/subscription-businesses-pennsylvania) (90)
- [Subscription businesses in Utah](https://www.tamtam.ai/l/subscription-businesses-utah) (89)
- [Subscription businesses in Washington State](https://www.tamtam.ai/l/subscription-businesses-washington-state) (86)
- [Subscription businesses in New Jersey](https://www.tamtam.ai/l/subscription-businesses-new-jersey) (85)
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- [Subscription businesses in North Carolina](https://www.tamtam.ai/l/subscription-businesses-north-carolina) (62)
- [Subscription businesses in New York](https://www.tamtam.ai/l/subscription-businesses-new-york) (422)
- [Subscription businesses in San Francisco](https://www.tamtam.ai/l/subscription-businesses-san-francisco) (323)
- [Subscription businesses in Austin](https://www.tamtam.ai/l/subscription-businesses-austin) (112)
- [Subscription businesses in Chicago](https://www.tamtam.ai/l/subscription-businesses-chicago) (92)
- [Subscription businesses in Boston](https://www.tamtam.ai/l/subscription-businesses-boston) (87)
- [Subscription businesses in Atlanta](https://www.tamtam.ai/l/subscription-businesses-atlanta) (66)
- [Subscription businesses in Washington](https://www.tamtam.ai/l/subscription-businesses-washington) (63)
- [Subscription businesses in Los Angeles](https://www.tamtam.ai/l/subscription-businesses-los-angeles) (60)

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Source: https://www.tamtam.ai/l/subscription-businesses-illinois