| # | Company | Employees |
|---|---|---|
| 1 | 41,201 | |
| 2 |
Leo Burnettleoburnett.com
Global communications agency combining creativity, data, and technology to influence human behavior and drive client prosperity worldwide. |
6,825 |
| 3 |
Starcomstarcomww.com
A global leader in communications planning and media, focused on putting people at the center to inspire and drive business forward through data and technology |
5,691 |
| 4 | 2,827 | |
| 5 |
Credicocredico.com
A leading customer acquisition agency connecting brands with local sales teams to acquire new customers through face-to-face methods |
2,779 |
| 6 |
BCD Meetings & Eventsbcdme.com
Design and delivery of customized live and digital meeting experiences through event management and strategic design to foster global human connection. |
2,598 |
| 7 |
Marketing Werksproductconnections.com
A fully integrated engagement agency specializing in omnichannel solutions to build brand-consumer relationships, offering a suite of creative services |
1,826 |
| 8 |
Valassis Marketing Solutionsrrd.com
Innovative marketing solutions company powering business-to-human connections, driving economic growth, and accelerating revenue potential for brands through data intelligence and technology |
1,743 |
| 9 |
Some Film Companysomefilm.co
A movie production studio specializing in commercials, feature films, and television with locations in Chicago, Los Angeles, and Athens, Greece |
1,332 |
| 10 |
Marksmakemarks.com
Global brand design and experience agency part of a brand impact group, providing expertise in brand needs from intelligence to expression |
1,179 |
| 11 |
Czarnowski Collectiveczarnowskicollective.com
A full-service marketing company specializing in creating unforgettable brand experiences through strategic storytelling, creativity, fabrication, and global operations for over 70 years |
943 |
| 12 |
Golingolinketchum.com
Global PR agency driving impactful change for clients, earning attention through collaborative work Award-winning, recognized for excellence and employee satisfaction |
942 |
| 13 |
MERGEmergeworld.com
Data-driven storytelling and AI-powered personalization services for healthcare and consumer brands across strategy, creative, public relations, performance marketing, and digital platform expertise. |
880 |
| 14 |
Smithbucklinsmithbucklin.com
Providing comprehensive association management, event coordination, educational programming, and strategic consulting to modernize operations, advance organizational missions, and deliver enhanced member value. |
708 |
| 15 |
Arc Worldwidearcww.com
A leading shopper and retail agency focused on creating Irresistible Commerce by uncovering growth barriers, delivering creative solutions, and driving brand sales and love |
609 |
| 16 |
Stewart Talentstewarttalent.com
A leading national talent agency with offices in four major US markets, offering comprehensive representation in television, film, theatre, voice-over, commercial, print, and more |
566 |
| 17 |
The Black Sheeptheblacksheep.marketing
An integrated collegiate media and marketing company that helps businesses reach students at over 200 universities through relationship-driven strategies |
505 |
| 18 |
Advantage Unified Commerceadvantageunifiedcommerce.com
Innovative commerce agency unifying specialists from agencies, retailers, brands, and startups to scale commerce using advanced data and technology |
494 |
| 19 |
Blue Chipbluechipww.com
A Chicago-based marketing agency specializing in brand and shopper marketing, combining the resources of a holding company with the agility of a private agency Bringing change through powerful ideas |
436 |
| 20 |
DMAdigitalmarketingagency.com
Specialized digital marketing solutions for businesses of all sizes, offering tailored campaigns to meet objectives and exceed expectations through innovation |
431 |
| 21 |
C.A. Fortunecafortune.com
A full-service consumer brands agency offering brand incubation, sales management, marketing, insights, and more with national scope and seamless integration |
419 |
| 22 |
PRA Business Eventspra.com
Leading business event management firm creating transformative and impactful experiences through strategy, collaboration, design, and operational excellence for over four decades |
405 |
| 23 |
rEvolutionrevolutionworld.com
Global sports marketing agency specializing in sponsorship consulting, creative campaigns, media planning, and analytics for brands and rights holders worldwide |
403 |
| 24 |
Rise, a Quad agencymeetrise.com
Full-service media agency specializing in omnichannel commerce, retail media, advanced analytics, and creator marketing to deliver integrated experiences through proprietary technology stacks. |
387 |
| 25 |
Currenttalktocurrent.com
The company creates authentic connections between brands and people through strategic PR, digital, and social media campaigns backed by deep resources |
378 |
| 26 |
Fusion92fusion92.com
The company based in Chicago creates marketplace reactions by integrating expertise and thought leadership across disciplines to achieve remarkable results |
371 |
| 27 |
Intersportintersport.global
An award-winning agency specializing in creating engaging ideas, content, and experiences to attract and captivate passionate audiences |
364 |
| 28 |
IMS Integrated Merchandising Solutionsimsretail.com
IMS is a diverse marketing solutions provider, representing leading brands with a focus on best execution at lowest price in North America |
360 |
| 29 |
BBDO Chicagoenergybbdo.com
A global creative agency focused on energizing people and brands through innovative thinking, teamwork, and commitment to delivering exceptional work |
348 |
| 30 |
PromoWorksproductconnections.com
An integrated engagement agency specializing in omnichannel solutions to build relationships between brands and consumers, offering creative services from start to finish |
345 |
| 31 |
Plan B庐thisisplanb.com
A results-driven marketing agency committed to pushing boundaries, promoting positive change, and operating mindfully as a certified B Corp |
344 |
| 32 |
Kensiumkensium.com
A full-service ecommerce solutions provider specializing in Magento and BigCommerce websites, Acumatica integration, technical SEO, PPC campaigns, and ongoing support services |
336 |
| 33 |
All Terrainallterrain.net
A global experiential marketing agency creating activations, events, and campaigns that drive real connections, press coverage, and measurable results for brands |
320 |
| 34 |
Conversantepsilon.com
A company specializing in interaction management, using data science and personalized digital media to create meaningful customer experiences with transparency and privacy |
319 |
| 35 | 316 | |
| 36 |
Legacy Marketinglegacymarketing.com
This company specializes in creating cross-cultural and generational experiences through strategic, creative, and production services that leave a lasting impact |
310 |
| 37 |
Everspringeverspringpartners.com
Everspring partners with higher education institutions to deliver customized online education solutions, embracing the transformative power of education |
308 |
| 38 |
AbelsonTaylor Groupabelsontaylorgroup.com
This company specializes in providing ROI through expertise, insights, creativity, and strategy, transforming brands with imaginative approaches to drive market results |
272 |
| 39 |
Walker Sandswalkersands.com
An outcome-based B2B marketing agency offering insights, strategy, branding, creative, and media services to drive business growth and engagement for global clients |
239 |
| 40 |
LEClecltd.com
A Chicago-based company founded in 1986, LEC specializes in building and sustaining brands through strategic messaging, award-winning design, and creative solutions |
234 |
| 41 |
Neolytixneolytix.com
Management partner for healthcare organizations providing revenue cycle, administrative, clinical, IT, finance, and marketing support services. |
190 |
| 42 |
BCVrategainsoho.com
A leading provider of social media solutions for the hospitality industry, offering monitoring, engagement, content development, strategy services, and ROI optimization |
181 |
| 43 |
DOE Mediadoemedia.com
A data-driven direct response advertising agency providing sophisticated solutions for startups to Fortune 500 Brands in various verticals, generating $700+ million in trackable revenue |
119 |
| 44 |
Lyons Consulting Grouplyonscg.com
Global commerce service provider specializing in delivering innovative digital commerce solutions and guiding clients through retail and eCommerce challenges to optimize performance and growth |
64 |
| 45 |
RiverNorthrivernorthgroup.com
The RiverNorth Group is a collection of innovative marketing companies pushing the boundaries with creative branding and high-quality services for brands |
46 |
| 46 |
The Heisttheheist.com
This company specializes in production, post-production, and animation services, creating engaging content such as "The Heist" |
46 |
| 47 |
imagination.themxgroup.com
A B2B agency specializing in content marketing, part of The Mx Group, offering brand, demand, digital, and strategic solutions |
34 |
| 48 |
Faustfaustltd.com
A team of artists and designers creating impactful visual communication solutions to inspire change, empower communities, and amplify meaningful messages |
26 |
| 49 |
Pilot Digital Marketingpilotdigital.com
Provider of comprehensive Internet marketing strategies and solutions to help businesses find and retain customers through improving online presence |
16 |
| 50 |
VisualFizzvisualfizz.com
A Chicago-based digital marketing agency specializing in branding, analytics, and web experiences to help brands grow efficiently through creative media campaigns |
15 |
| 51 |
Psycray Corppsycray.com
A service company providing high-quality Internet technology solutions, specializing in internet marketing, SEO, SEM, web design, and domain management |
15 |
| 52 |
Notre Dame Global Partnershipsund.com
An organization managing sales, marketing, sponsorship, and branding for University of Notre Dame Athletics, forming partnerships with industry-leading brands globally |
14 |
| 53 |
DigitalMarketing360digitalmarketing360.com
Innovative digital marketing solutions provider offering SEO, digital marketing, mobile app development, and social media optimization services to help businesses grow |
4 |
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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 2, 2026.
More company lists in Chicago
- The largest companies in Chicago 1,861
- Financial services firms in Chicago 212
- Financial Services companies in Chicago 185
- Education providers in Chicago 138
- SaaS companies in Chicago 132
- Consulting firms in Chicago 127
- IT Services and IT Consulting companies in Chicago 115
- IT services companies in Chicago 114
- Venture capital and private equity firms in Chicago 106
- AI companies in Chicago 100
- Hospitals and Health Care companies in Chicago 99
- Software Development companies in Chicago 97
- Manufacturers in Chicago 97
- Healthcare providers in Chicago 86
- Retail chains in Chicago 84
- Critical infrastructure operators in Chicago 74
- Publicly traded companies in Chicago 71
- Real Estate companies in Chicago 67
- Non-profit Organizations companies in Chicago 66
- Venture Capital and Private Equity Principals companies in Chicago 62
- Advertising Services companies in Chicago 56
- Food and Beverage Services companies in Chicago 52
- Business Consulting and Services companies in Chicago 51
- Higher Education companies in Chicago 51
The same list elsewhere in United States
- Marketing and communications agencies in the United States 1,807
- Marketing and communications agencies in New York State 449
- Marketing and communications agencies in California 288
- Marketing and communications agencies in Florida 111
- Marketing and communications agencies in Texas 98
- Marketing and communications agencies in Illinois 89
- Marketing and communications agencies in New Jersey 55
- Marketing and communications agencies in Massachusetts 46
- Marketing and communications agencies in Georgia 45
- Marketing and communications agencies in Pennsylvania 41
- Marketing and communications agencies in Michigan 40
- Marketing and communications agencies in Ohio 38
- Marketing and communications agencies in Minnesota 37
- Marketing and communications agencies in Washington State 37
- Marketing and communications agencies in Arizona 30
- Marketing and communications agencies in North Carolina 30
- Marketing and communications agencies in Missouri 26
- Marketing and communications agencies in New York 389
- Marketing and communications agencies in Los Angeles 65
- Marketing and communications agencies in San Francisco 53
- Marketing and communications agencies in Miami 31
- Marketing and communications agencies in Atlanta 28
- Marketing and communications agencies in Boston 26
- Marketing and communications agencies in San Diego 26