Company lists · Data refreshed September 2026
Top 25 Upper middle market private equity firms based in Chicago, United States
RevenueBase identified 333 upper middle market private equity firms headquartered in Chicago, United States as of September 2026 and tracks 6,025 professional contacts across them, including 3,620 with verified work emails. New York is the largest hub.
This list covers upper middle market private 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 21, 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 upper middle market private equity firms based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 367 contacts → | ||||
Strong evidence “Adams Street Partners is a global investment firm managing a comprehensive suite of private markets investment solutions.” Source: RevenueBase Database · checked Sep 21, 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 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 325 contacts → | ||||
Strong evidence “Monroe Capital LLC (“Monroe”) is a premier asset management firm specializing in private credit markets across various strategies, including direct lending, technology finance…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 309 contacts → | ||||
Indirect evidence “Thoma Bravo is the world’s largest software-focused investment firm, with more than $172 billion in assets under management as of March 31, 2026.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 237 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 138 contacts → | ||||
Indirect evidence “Founded in 1954, the Association for Corporate Growth (ACG) has 60 chapters worldwide, representing members.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 134 contacts → | ||||
Indirect evidence “We use a patient, long-term investment strategy applying our scale, relationships, and experience.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 131 contacts → | ||||
Indirect evidence “Experience.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 129 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 110 contacts → | ||||
Strong evidence “Chicago Atlantic is a private market investment firm combining deep expertise with an entrepreneurial approach to multi-asset class investing.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 103 contacts → | ||||
Strong evidence “NXT Capital is a direct lender with a specialized focus on high-quality middle-market solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 99 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 86 contacts → | ||||
Strong evidence “Equity Group Investments (EGI) is the private investment firm founded by Sam Zell in 1968.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 82 contacts → | ||||
Strong evidence “Based in Chicago, Waud Capital Partners is a leading growth-oriented private equity firm.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 81 contacts → | ||||
Strong evidence “Linden Capital Partners is a Chicago-based private equity firm focused exclusively on leveraged buyouts in the healthcare and life sciences industries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 79 contacts → | ||||
Strong evidence “Flexpoint Ford is a specialist private equity firm focused on financial services and adjacent verticals.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 78 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 78 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 69 contacts → | ||||
Strong evidence “PMCF is a middle market investment bank that provides merger and acquisitions advisory services to individual and family-owned businesses, large public companies, and private…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 67 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 65 contacts → | ||||
Partial 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 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 63 contacts → | ||||
Indirect evidence “Chicago Pacific Founders (“CPF”) is a strategic healthcare investment firm with a focus on healthcare services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 60 contacts → | ||||
Indirect evidence “Sterling Partners is an investment management platform.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 58 contacts → | ||||
Strong evidence “Peakstone is the trusted partner and leading force in the lower middle market U.S.” Source: RevenueBase Database · checked Sep 21, 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: upper middle market private 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 upper middle market private equity firms.
- Partial evidence
- Its own public description names part of upper middle market private equity firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name upper middle market private 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 333 upper middle market private equity firms based in Chicago, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 3,620 reachable decision-makers.
Free signup · no credit card
Upper middle market private equity firms based in Chicago, United States at a glance
As of Sep 21, 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 333 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 upper middle market private 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 “upper middle market private 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 upper middle market private 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 upper middle market private 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, 3,620 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 21, 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.
Upper middle market private equity firms by metro in the United States
- Upper middle market private equity firms in New York958
- Upper middle market private equity firms in Chicago333
- Upper middle market private equity firms in Dallas294
- Upper middle market private equity firms in Los Angeles231
- Upper middle market private equity firms in Houston194
- Upper middle market private equity firms in Boston186
- Upper middle market private equity firms in Austin171
- Upper middle market private equity firms in San Francisco170
- Upper middle market private equity firms in Miami162
- Upper middle market private equity firms in Atlanta149
- Upper middle market private equity firms in Denver107
- Upper middle market private equity firms in Charlotte93
- Upper middle market private equity firms in Greenwich67
- Upper middle market private equity firms in Washington61
- Upper middle market private equity firms in Tampa54
- Upper middle market private equity firms in San Diego52
- Upper middle market private equity firms in Nashville50
- Upper middle market private equity firms in Newport Beach49
- Upper middle market private equity firms in Seattle49
- Upper middle market private equity firms in Minneapolis46
- Upper middle market private equity firms in Cleveland42
- Upper middle market private equity firms in Philadelphia40
- Upper middle market private equity firms in Birmingham39
- Upper middle market private equity firms in Salt Lake City37
- Upper middle market private equity firms in Boca Raton36
- Upper middle market private equity firms in Phoenix34
- Upper middle market private equity firms in Santa Monica34
- Upper middle market private equity firms in Beverly Hills33
- Upper middle market private equity firms in West Palm Beach33
- Upper middle market private equity firms in Scottsdale31
- Upper middle market private equity firms in New York City30
- Upper middle market private equity firms in Stamford30
- Upper middle market private equity firms in Cincinnati29
- Upper middle market private equity firms in Columbus26
- Upper middle market private equity firms in Fort Lauderdale26
- Upper middle market private equity firms in Orlando26
- Upper middle market private equity firms in Palo Alto26
- Upper middle market private equity firms in Pittsburgh26
- Upper middle market private equity firms in Indianapolis25
- Upper middle market private equity firms in Las Vegas25
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 upper middle market private 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 upper middle market private equity firms are there based in Chicago, United States?
RevenueBase identified 333 upper middle market private 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 upper middle market private equity firms?
New York leads with 958 headquartered companies, followed by Chicago (333) and Dallas (294).
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 3,620 verified decision-maker contacts tracked across these 333 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 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 333 upper middle market private equity firms based in Chicago, United States. Start with a free account, no credit card.
Download this list →Related lists
Upper middle market private equity firms by geography
- Upper middle market private equity firms based in Calgary, Canada
- Upper middle market private equity firms based in Montreal, Canada
- Upper middle market private equity firms based in Toronto, Canada
- Upper middle market private equity firms based in Vancouver, Canada
- Upper middle market private equity firms based in Berlin, Germany
- Upper middle market private equity firms based in Munich, Germany
- Upper middle market private equity firms based in Atlanta, United States
- Upper middle market private equity firms based in Austin, United States
- Upper middle market private equity firms based in Beverly Hills, United States
- Upper middle market private equity firms based in Birmingham, United States
- Upper middle market private equity firms based in Boca Raton, United States
- Upper middle market private equity firms based in Boston, United States
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Upper middle market private equity firms based in Calgary, Canada
- Upper middle market private equity firms based in Montreal, Canada
- Upper middle market private equity firms based in Toronto, Canada
- Upper middle market private equity firms based in Vancouver, Canada
- Upper middle market private equity firms based in Berlin, Germany
- Upper middle market private equity firms based in Munich, Germany