Company lists · Data refreshed September 2026

Top 25 Middle market private equity companies based in Chicago, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 317 companies tracked

RevenueBase identified 317 middle market private equity companies headquartered in Chicago, United States as of September 2026 and tracks 5,785 professional contacts across them, including 3,553 with verified work emails. New York is the largest hub.

This list covers middle market private equity companies 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

317Companies

5,785Contacts tracked

3,553Verified emails

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

Ranked by team size

Top 25 of 317 middle market private equity companies based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names middle market private equity companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Adams Street PartnersStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	201-500	367
	“Adams Street Partners is a global investment firm managing a comprehensive suite of private markets investment solutions.” Source: company website · checked Sep 5, 2026
2	Shore Capital PartnersStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	327
	“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: company website · checked Sep 5, 2026
3	Monroe Capital LLCStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	201-500	325
	“Monroe Capital LLC (“Monroe”) is a premier asset management firm specializing in private credit markets across various strategies, including direct lending, technology finance…” Source: company website · checked Sep 5, 2026
4	Thoma BravoIndirect evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	201-500	309
	“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: company website · checked Sep 5, 2026
5	Gtcr LLCStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	237
	“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: company website · checked Sep 5, 2026
6	Association For Corporate Growth ACGIndirect evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	138
	“Founded in 1954, the Association for Corporate Growth (ACG) has 60 chapters worldwide, representing members.” Source: company website · checked Sep 5, 2026
7	Pgim Private CapitalIndirect evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	134
	“We use a patient, long-term investment strategy applying our scale, relationships, and experience.” Source: company website · checked Sep 5, 2026
8	BPOCIndirect evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	11-50	131
	“Experience.” Source: company website · checked Sep 5, 2026
9	TPG Twin Brook Capital PartnersStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	129
	“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: company website · checked Sep 5, 2026
10	Chicago AtlanticStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	110
	“Chicago Atlantic is a private market investment firm combining deep expertise with an entrepreneurial approach to multi-asset class investing.” Source: company website · checked Sep 5, 2026
11	NXT CapitalStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	103
	“NXT Capital is a direct lender with a specialized focus on high-quality middle-market solutions.” Source: company website · checked Sep 5, 2026
12	Madison Dearborn Partners, LLCStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	99
	“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: company website · checked Sep 5, 2026
13	Equity Group InvestmentsStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	86
	“Equity Group Investments (EGI) is the private investment firm founded by Sam Zell in 1968.” Source: company website · checked Sep 5, 2026
14	Waud Capital PartnersStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	82
	“Based in Chicago, Waud Capital Partners is a leading growth-oriented private equity firm.” Source: company website · checked Sep 5, 2026
15	Linden Capital PartnersStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	81
	“Linden Capital Partners is a Chicago-based private equity firm focused exclusively on leveraged buyouts in the healthcare and life sciences industries.” Source: company website · checked Sep 5, 2026
16	Flexpoint FordStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	79
	“Flexpoint Ford is a specialist private equity firm focused on financial services and adjacent verticals.” Source: company website · checked Sep 5, 2026
17	Wind Point PartnersStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	11-50	78
	“Wind Point Partners is a Chicago-based private equity investment firm with approximately $6 billion in assets under management*.” Source: company website · checked Sep 5, 2026
18	RCP AdvisorsStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	78
	“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: company website · checked Sep 5, 2026
19	PPC Pritzker Private CapitalStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	67
	“PPC partners with middle-market companies based in North America with positions in the manufactured products and services sectors.” Source: company website · checked Sep 5, 2026
20	Morgan Street HoldingsPartial evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	65
	“Morgan Street Holdings is a holding company and private investment group with a growth mindset, owning a diverse portfolio across industries.” Source: company website · checked Sep 5, 2026
21	Chicago Pacific FoundersIndirect evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	11-50	63
	“Chicago Pacific Founders (“CPF”) is a strategic healthcare investment firm with a focus on healthcare services.” Source: company website · checked Sep 5, 2026
22	Sterling PartnersIndirect evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	60
	“Sterling Partners is an investment management platform.” Source: company website · checked Sep 5, 2026
23	Tyree & D'angelo PartnersStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	11-50	59
	“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: company website · checked Sep 5, 2026
24	Core Industrial PartnersStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	11-50	57
	“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: company website · checked Sep 5, 2026
25	G SquaredPartial evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	11-50	54
	“Founded in 2011, G Squared is aligned to a fundamental shift: venture-backed companies are staying private longer.” Source: company website · checked Sep 5, 2026

Showing 25 of 317 middle market private equity companies based in Chicago, United States

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Middle market private equity companies based in Chicago, United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 911 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

201

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 this city, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 317 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 middle market private equity companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “middle market private equity companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among middle market private equity companies, 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 an evidence 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, 3,553 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 5, 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.

Middle market private equity companies by metro in the United States

Frequently asked

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

RevenueBase identified 317 middle market private equity companies 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 middle market private equity companies?

New York leads with 911 headquartered companies, followed by Chicago (317) and Dallas (276).

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 3,553 verified decision-maker contacts tracked across these 317 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 5, 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.