| # | Company | Employees |
|---|---|---|
| 1 |
The Heico Companies LLCheicocompanies.com
A privately held company with 74 separate acquisitions in manufacturing, construction, and industrial services, focused on growth and success |
4,427 |
| 2 | 429 | |
| 3 |
Adams Street Partnersadamsstreetpartners.com
Global investment manager specializing in private markets with diverse strategies, extensive experience, and offices across multiple continents. |
419 |
| 4 |
Shore Capital Partnersshorecp.com
Investment firm focusing on lower middle market companies in healthcare, food, business services, industrial, and real estate sectors. |
378 |
| 5 |
Madison Dearborn Partners, LLCmdcp.com
Private equity firm investing in upper middle and middle market companies across five industry verticals, partnering with management teams for growth. |
103 |
| 6 |
Equity Group Investmentsegizell.com
A private investment firm with over 50 years of experience, focused on direct private investments and growing companies across various industries |
97 |
| 7 |
Wind Point Partnerswppartners.com
Private equity firm partnering with top executives to acquire middle market businesses, develop value creation plans, and drive growth and operational improvements |
84 |
| 8 |
PPC (Pritzker Private Capital)ppcpartners.com
Private equity firm specializing in partnering with middle-market companies in North America, focusing on manufactured products and services Long-term capital, responsible investment practices |
81 |
| 9 |
Keystone Capitalkeystonecapital.com
Investment firm founded in 1994, managing over $1 billion in capital across two funds, focusing on building long-term value in market-leading businesses |
81 |
| 10 |
Waud Capital Partnerswaudcapital.com
A growth-oriented private equity based in Chicago partnering with management teams to build market-leading companies in healthcare and software/technology industries |
75 |
| 11 |
Cleveland Avenueclevelandavenue.com
A privately-held venture capital firm investing in, building, and extending brands across various industries, with a focus on growth and innovation |
67 |
| 12 |
ARCH Venture Partnersarchventure.com
Venture firm specializing in early-stage life science investments aimed at advancing innovations for disease prevention, detection, and cure |
67 |
| 13 |
Wynnchurch Capital, L.P.wynnchurch.com
A leading middle-market private equity investment firm partnering with companies in the US and Canada for growth and profit improvement |
61 |
| 14 |
Baird Capitalbairdcapital.com
Global investment firm specializing in venture capital, growth equity, and private equity investments across targeted sectors, partnering with industry executives to build successful companies |
46 |
| 15 |
OCA Venturesocaventures.com
An early stage venture capital firm investing in technology and highly-scalable services businesses with dramatic growth potential |
45 |
| 16 |
The Edgewater Fundsedgewaterfunds.com
Chicago-based private equity firm partnering with management to accelerate growth in businesses through over $4 billion in capital commitments raised since 2001 |
38 |
| 17 |
MK Capitalmkcapital.com
Early-stage investor in software and cloud services industries, partnering with management teams to accelerate digital transformation Manages over $300 million in capital |
34 |
| 18 |
Hyde Park Venture Partnershydeparkvp.com
Early stage venture capital firm based in Chicago, focusing on high-growth technology startups in the mid-continent region with strong founding teams seeking capital |
33 |
| 19 |
VITALIZE Venture Capitalvitalize.vc
Funds pre-seed and seed-stage companies. Also, an angel community investing in the future of work. |
33 |
| 20 |
LongJumplongjump.vc
A Chicago-based venture fund investing in the next generation of founders by providing capital, connections, and community for fast-growing businesses |
32 |
| 21 |
Benford Capital Partnersbenfordcapital.com
Private equity firm in Chicago specializing in leveraged buyouts of lower middle market companies, partnering with founders and managers for long-term growth and success |
29 |
| 22 | 27 | |
| 23 |
Kinzie Capital Partners LPkinziecp.com
A Chicago-based private equity firm focused on making control and minority investments in US companies, driving growth through operational excellence and technological innovation |
24 |
| 24 |
Listen Ventureslisten.co
Venture capital firm investing in consumer-focused entrepreneurs at the forefront of behavioral changes, prioritizing consumer feedback and insights |
22 |
| 25 |
Akoya Capital, LLCakoyacapital.com
Chicago-based private investment firm specializing in lower middle market, partnering with founders and CEOs for profitable, well-positioned businesses in Industrial and Consumer sectors |
20 |
| 26 |
Capitalize VClinktr.ee
Chicago-based venture capital firm investing in diverse founders, connecting them to a diverse community of investors and advisors Focus on pre-seed/seed e-commerce, fintech, consumer brands |
20 |
| 27 |
Sandalphon Capitalsandalphoncapital.com
Venture capital firm investing in Pre-Seed and Seed stage B2B SaaS, Marketplace, and Consumer startups in Chicago and the Midwest across various industries |
19 |
| 28 |
KB Partnerskbpartners.com
An investment firm based in suburban Chicago, specializing in early stage venture capital investments in sports and technology startups |
18 |
| 29 |
Performant Capitalperformantcapital.com
Chicago-based private equity firm focusing on technology-driven companies in the lower middle market with expertise in SaaS, tech services, and data intelligence |
17 |
| 30 |
Venture Forward Capitalventureforwardcapital.com
A venture capital firm investing in early-stage startups with outcome-oriented founders, unique domain expertise, and notable connections for creating successful businesses |
17 |
| 31 |
Corazon Capitalcorazon.com
Chicago-based venture fund specializing in Seed and Series A investing, providing pragmatic counsel to entrepreneurs with a blend of operating expertise and investing experience |
16 |
| 32 |
VentureDNAventuredna.com
Boutique private equity firm investing in early stage companies globally, offering mentor capital, strategic business planning, marketing, funding, and consulting services Headquarters in Chicago |
16 |
| 33 |
Illinois Venturesillinoisventures.com
Seed and early-stage investment firm supporting healthcare and technology startups, focused on building a thriving entrepreneurial community and creating market-changing businesses |
13 |
| 34 |
Fox Venturesfox-companies.com
Venture capital firm investing in various sectors, leveraging a strong relationship with Research Park at University of Illinois for diverse investments |
13 |
| 35 |
Chicago Ventureschicagoventures.com
This company invests in early-stage startups and provides active operational support to help founders build enduring companies anywhere |
12 |
| 36 |
Tensility Venture Partnerstensilityvc.com
This company invests in and grows startups focused on AI, specifically in cyber security, digital health, and vertical industry applications They value innovation and collaboration |
11 |
| 37 |
306 Capital
306 Capital is a Venture Capital firm that invests in consumer-facing and innovative technology companies to accelerate growth through strategic capital |
11 |
| 38 |
New Stack Venturesnewstack.com
A venture capital firm founded in 2015 focuses on investing in tech leaders, with successful funds and innovative software tools for identifying partners |
10 |
| 39 |
Chicago Growth Partnerscgp.com
A private equity firm with expertise in Education, Tech-Enabled Services, Healthcare, and Industrial Growth, helping management teams achieve growth objectives |
9 |
| 40 |
Charles Thayne Capitalcharlesthayne.com
A growth-oriented private investment firm partnering with world-class leaders to drive industry transformation through technology and data science |
9 |
| 41 |
Method Capitalmethod.capital
Chicago-based venture capital firm investing in growth stage B2B technology companies with recurring revenue and scalable business models in the Midwest and beyond |
7 |
| 42 |
Promus Venturespromusventures.com
A global venture capital firm specializing in deep-tech startups digitizing mature industries, providing financing, strategic guidance, and operational support |
7 |
| 43 |
West Suburban Angels Inc.westsuburbanangels.com
An angel investment group that provides financial support and guidance to startups and early-stage companies looking to grow and scale |
7 |
| 44 |
FireStarter Fundfirestarterfund.com
Early stage investment fund supporting technology companies with experienced Chicago entrepreneurs, focusing on nurturing innovation and fostering a supportive business community |
7 |
| 45 |
CIC Angelscicangels.com
Early-stage angel syndicate supporting founders in building turnkey solutions, with a focus on trust, collaboration, and providing unique value |
7 |
| 46 |
Exccess Venture Fund I, LLCexccessventurefund.com
A venture capital firm investing in growth-stage technology companies with backing from top VC firms, focusing on paramount opportunities Contact darrenniemann@gmailcom |
5 |
| 47 |
10H Capital10hcapital.com
A multi-strategy venture fund investing in early to later-stage ventures, founded by successful Limited Partners with expertise in business creation and operations |
5 |
| 48 |
Tawani Venturestawaniventures.com
Early-stage venture fund in Chicago backing diverse Midwest startups with investments ranging from $200K-$500K, providing ongoing support and flexibility for growth |
5 |
| 49 |
Chaifetz Groupchaifetzgroup.com
Venture capital and private equity firm focusing on early and mid-stage growth companies, with a proven track record of building businesses and creating lasting value |
5 |
| 50 |
Off Center Venturesoffcenter.vc
This Chicago-based entrepreneur focuses on building and investing in early stage growth companies that leverage media as a core competency |
4 |
| 51 | 4 | |
| 52 |
Tin Goose Partnerstingoosepartners.com
An investment firm targeting healthcare, transportation, and financial services industries Specializing in growth capital investments, acquisitions, and operational improvements for middle market businesses |
4 |
| 53 |
Giant Step Capitalgiantstep.vc
A venture capital firm focused on deep tech, hard tech, and frontier tech, empowering visionary innovators to push boundaries in technology |
3 |
| 54 |
Omkara Ventures (OMV)
A hybrid venture and growth company supporting early-stage startups with a data-driven approach to accelerate revenue growth through technology and customer focus |
3 |
| 55 |
Kleinmuntz Associates LLCkleinmuntzassociates.com
A venture capital firm based in Chicago, focusing on analytics, biotechnology, and healthcare, supporting early stage startups with angel investment and advisory services |
3 |
| 56 |
New Leaf Capitalnewleafinvest.com
A boutique venture capital firm investing in disruptive ideas across all industries, providing hands-on support and advice to entrepreneurs |
3 |
| 57 |
Cannan Ventureslinkedin.com
Global venture capital firm investing in passionate teams with innovative ideas Specializing in helping venture firms understand new markets and succeed in new regions |
2 |
| 58 |
Anoth Group Incanothgroup.com
A Venture Capital firm based in Hayward, California that provides funding and support to startups and emerging businesses |
2 |
| 59 |
Pritzker Group Venture Capitalpritzkergroup.com
A venture capital firm that invests in early-stage technology companies with a focus on supporting entrepreneurs and driving innovation |
2 |
| 60 |
SmoothBrainsmoothbrain.com
A Chicago-based Venture Capital/PE firm funding and advising startups in emerging tech, founded in 2022 and having funded 7 companies |
2 |
| 61 |
u.venturesu.ventures
An investment firm, uventures, specializes in funding early-stage technology startups with strong teams and global growth potential for lasting impact |
2 |
| 62 |
Horizon5 Capital
Investing in early-stage companies leveraging artificial intelligence for enterprise solutions, driving growth and innovation in the AI space |
2 |
| 63 |
Ringleader Venturesrlv.vc
A venture capital firm focused on fostering partnerships between startups and corporations for mutual success, redefining the relationship as collaborative rather than competitive |
1 |
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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 Oct 24, 2026.
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