Company lists · Data refreshed September 2026
Top 25 Mid-market equity firms based in Chicago, United States
RevenueBase identified 269 mid-market equity firms headquartered in Chicago, United States as of September 2026 and tracks 4,114 professional contacts across them, including 2,521 with verified work emails. New York is the largest hub.
This list covers mid-market equity firms headquartered in Chicago, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest mid-market equity firms based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 367 contacts → | ||||
Partial evidence “Adams Street Partners is a global investment firm managing a comprehensive suite of private markets investment solutions.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 327 contacts → | ||||
Strong evidence “Shore Capital, a Chicago-based private equity firm with an office in Nashville, is an investor in lower-middle market companies in the Healthcare, Food and Beverage, Business…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 237 contacts → | ||||
Partial evidence “Founded in 1980, GTCR is a leading private equity firm that invests behind The Leaders Strategy™ – finding and partnering with management leaders in core domains to identify…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 134 contacts → | ||||
Indirect evidence “We use a patient, long-term investment strategy applying our scale, relationships, and experience.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 131 contacts → | ||||
Indirect evidence “Experience.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 129 contacts → | ||||
Partial evidence “TPG Twin Brook Capital Partners, TPG Angelo Gordon’s middle market direct lending business, is a direct lending finance company focused on providing cash-flow based financing…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 99 contacts → | ||||
Partial evidence “Madison Dearborn Partners, LLC ("MDP") is a leading private equity investment firm based in Chicago that, since its formation in 1992, has raised aggregate capital of…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 86 contacts → | ||||
Partial evidence “Equity Group Investments (EGI) is the private investment firm founded by Sam Zell in 1968.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 79 contacts → | ||||
Partial evidence “Flexpoint Ford is a specialist private equity firm focused on financial services and adjacent verticals.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 78 contacts → | ||||
Partial evidence “Wind Point Partners is a Chicago-based private equity investment firm with approximately $6 billion in assets under management*.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 78 contacts → | ||||
Partial evidence “Founded in 2001, RCP Advisors, a strategy of Ridgepost Capital (NYSE: RPC), is a private equity investment firm that provides access to North American small buyout fund managers…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 67 contacts → | ||||
Partial evidence “PPC partners with middle-market companies based in North America with positions in the manufactured products and services sectors.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 65 contacts → | ||||
Indirect evidence “Morgan Street Holdings is a holding company and private investment group with a growth mindset, owning a diverse portfolio across industries.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 60 contacts → | ||||
Indirect evidence “Sterling Partners is an investment management platform.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 59 contacts → | ||||
Strong evidence “Tyree & D'Angelo Partners ("TDP") is a private equity investment firm that focuses on control investments in the lower middle market (companies with $1-5M of EBITDA).” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 59 contacts → | ||||
Indirect evidence “For over 40 years, First Analysis has been at the forefront of supporting emerging growth companies and established leaders across high-growth, technology-driven sectors.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 57 contacts → | ||||
Partial evidence “CORE is an industrials-focused private equity firm with more than $1.58 billion in total limited partner capital commitments across four funds investing in North American lower…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 54 contacts → | ||||
Indirect evidence “Founded in 2011, G Squared is aligned to a fundamental shift: venture-backed companies are staying private longer.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 51 contacts → | ||||
Partial evidence “Frontenac is a Chicago-based private equity firm.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 49 contacts → | ||||
Partial evidence “Baird Capital makes venture capital, growth equity and private equity investments in strategically targeted sectors around the world.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 44 contacts → | ||||
Indirect evidence “Keystone was founded in 1994 with the objective of investing the personal capital of its partners in high-quality businesses; patiently building long-term value alongside…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 43 contacts → | ||||
Strong evidence “CIVC Partners is a private equity firm, based in Chicago, focused on middle market buyout, recapitalization, and growth equity investments in industry sectors where our firm can…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 42 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 38 contacts → | ||||
Indirect evidence “We're a hands-on, collaborative, and entrepreneur friendly early stage venture capital firm.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 37 contacts → | ||||
Indirect evidence “OFS Management is a group of affiliated companies that provides investment management services, focusing on debt financing solutions to North American corporations.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: mid-market equity firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names mid-market equity firms.
- Partial evidence
- Its own public description names part of mid-market equity firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name mid-market equity firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 269 mid-market equity firms based in Chicago, United States
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Mid-market equity firms based in Chicago, United States at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 269 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among mid-market equity firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Chicago, United States whose own description of what they do matches “mid-market equity firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names mid-market equity firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among mid-market equity firms, and records with no verified work email. Companies headquartered outside Chicago are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 2,521 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Mid-market equity firms by metro in the United States
- Mid-market equity firms in New York819
- Mid-market equity firms in Chicago269
- Mid-market equity firms in Dallas227
- Mid-market equity firms in Los Angeles198
- Mid-market equity firms in Boston162
- Mid-market equity firms in San Francisco159
- Mid-market equity firms in Houston138
- Mid-market equity firms in Austin129
- Mid-market equity firms in Miami123
- Mid-market equity firms in Atlanta108
- Mid-market equity firms in Denver81
- Mid-market equity firms in Charlotte62
- Mid-market equity firms in Greenwich58
- Mid-market equity firms in Minneapolis48
- Mid-market equity firms in Washington45
- Mid-market equity firms in Nashville41
- Mid-market equity firms in San Diego40
- Mid-market equity firms in Tampa40
- Mid-market equity firms in Seattle38
- Mid-market equity firms in Cleveland37
- Mid-market equity firms in Birmingham35
- Mid-market equity firms in Newport Beach35
- Mid-market equity firms in Philadelphia34
- Mid-market equity firms in Boca Raton31
- Mid-market equity firms in Stamford29
- Mid-market equity firms in Salt Lake City28
- Mid-market equity firms in New York City27
- Mid-market equity firms in Santa Monica26
- Mid-market equity firms in Scottsdale26
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names mid-market equity firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many mid-market equity firms are there based in Chicago, United States?
RevenueBase identified 269 mid-market equity firms headquartered in Chicago, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Adams Street Partners, headquartered in Chicago, tops this list with the largest team on record.
Which city has the most mid-market equity firms?
New York leads with 819 headquartered companies, followed by Chicago (269) and Dallas (227).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,521 verified decision-maker contacts tracked across these 269 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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