Company lists · Data refreshed September 2026

Top 25 Upper middle market private equity firms based in Chicago, United States

Name: Upper middle market private equity firms based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 333 companies tracked

RevenueBase identified 333 company matches for upper middle market private equity firms associated with Chicago, United States as of September 2026 and tracks 6,025 professional contacts across them, including 3,620 with verified work emails. Across the United States, New York is the largest hub for this category (988 companies); Chicago follows with 333.

This list covers company matches for upper middle market private equity firms associated with Chicago, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built

333Companies

6,025Contacts tracked

3,620Verified emails

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The 25 largest upper middle market private equity firms based in Chicago, United States

Ranked by team size

Top 25 of 333 company matches for upper middle market private equity firms based in Chicago, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Adams Street Partners	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	201-500	367 contacts →
	Exact match “Adams Street Partners is a global investment firm managing a comprehensive suite of private markets investment solutions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Shore Capital Partners	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	327 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Monroe Capital LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	201-500	325 contacts →
	Exact match “Monroe Capital LLC (“Monroe”) is a premier asset management firm specializing in private credit markets across various strategies, including direct lending, technology finance…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Thoma Bravo	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	201-500	309 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Gtcr LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	237 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Association For Corporate Growth ACG	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	138 contacts →
	Exact match “Founded in 1954, the Association for Corporate Growth (ACG) has 60 chapters worldwide, representing members.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Pgim Private Capital	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	134 contacts →
	Exact match “We use a patient, long-term investment strategy applying our scale, relationships, and experience.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	BPOC	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	11-50	131 contacts →
	Exact match “Experience.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	TPG Twin Brook Capital Partners	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	129 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Chicago Atlantic	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	110 contacts →
	Exact match “Chicago Atlantic is a private market investment firm combining deep expertise with an entrepreneurial approach to multi-asset class investing.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	NXT Capital	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	103 contacts →
	Exact match “NXT Capital is a direct lender with a specialized focus on high-quality middle-market solutions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Madison Dearborn Partners, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	99 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Equity Group Investments	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	86 contacts →
	Exact match “Equity Group Investments (EGI) is the private investment firm founded by Sam Zell in 1968.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Waud Capital Partners	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	82 contacts →
	Exact match “Based in Chicago, Waud Capital Partners is a leading growth-oriented private equity firm.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Linden Capital Partners	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	81 contacts →
	Exact match “Linden Capital Partners is a Chicago-based private equity firm focused exclusively on leveraged buyouts in the healthcare and life sciences industries.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Flexpoint Ford	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	79 contacts →
	Exact match “Flexpoint Ford is a specialist private equity firm focused on financial services and adjacent verticals.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Wind Point Partners	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	11-50	78 contacts →
	Exact match “Wind Point Partners is a Chicago-based private equity investment firm with approximately $6 billion in assets under management*.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	RCP Advisors	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	78 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Pmcf Investment Banking	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	11-50	69 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	PPC Pritzker Private Capital	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	67 contacts →
	Exact match “PPC partners with middle-market companies based in North America with positions in the manufactured products and services sectors.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Morgan Street Holdings	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	65 contacts →
	Exact match “Morgan Street Holdings is a holding company and private investment group with a growth mindset, owning a diverse portfolio across industries.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Chicago Pacific Founders	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	11-50	63 contacts →
	Exact match “Chicago Pacific Founders (“CPF”) is a strategic healthcare investment firm with a focus on healthcare services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Sterling Partners	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	51-200	60 contacts →
	Exact match “Sterling Partners is an investment management platform.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Tyree & D'angelo Partners	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	11-50	59 contacts →
	Exact match “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).” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	The Peakstone Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	11-50	58 contacts →
	Exact match “Peakstone is the trusted partner and leading force in the lower middle market U.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “upper middle market private equity firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 333 upper middle market private equity firms based in Chicago, United States

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Upper middle market private equity firms based in Chicago, United States at a glance

As of Sep 21, 2026

60.1%Verified-email coverage

18.1Average contacts per company

1-10Median size (employees)

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

216

11-50

51-200

201-500

501-1,000

1,001-5,000

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

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Chicago, United States whose business descriptions match “upper middle market private equity firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,620 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Upper middle market private equity firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “upper middle market private equity firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many upper middle market private equity firms are there based in Chicago, United States?

RevenueBase identified 333 company matches for upper middle market private equity firms associated with Chicago, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Adams Street Partners tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most upper middle market private equity firms?

New York leads the United States with 988 company records, 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 limited free results with 500 credits to start. Upgrading provides access to the 3,620 professional contacts with verified work emails tracked across these 333 companies; direct dials are available where recorded.

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.

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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 SmartSearch, 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.