Company lists · Data refreshed September 2026
Top 25 Lower middle market private equity firms based in Chicago, United States
RevenueBase identified 321 lower middle market private equity firms headquartered in Chicago, United States as of September 2026 and tracks 5,863 professional contacts across them, including 3,551 with verified work emails. New York is the largest hub.
This list covers lower 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 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.
The 25 largest lower middle market private equity firms based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 367 | ||||
“Adams Street Partners is a global investment firm managing a comprehensive suite of private markets investment solutions.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 2 | Shore Capital PartnersStrong evidence | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 6 | 138 | ||||
“Founded in 1954, the Association for Corporate Growth (ACG) has 60 chapters worldwide, representing members.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 7 | Pgim Private CapitalIndirect evidence | 134 | |||
“We use a patient, long-term investment strategy applying our scale, relationships, and experience.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 8 | 131 | ||||
“Experience.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 9 | TPG Twin Brook Capital PartnersStrong evidence | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 11 | NXT CapitalStrong evidence | 103 | |||
“NXT Capital is a direct lender with a specialized focus on high-quality middle-market solutions.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 12 | Madison Dearborn Partners, LLCStrong evidence | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 13 | 86 | ||||
“Equity Group Investments (EGI) is the private investment firm founded by Sam Zell in 1968.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 14 | 82 | ||||
“Based in Chicago, Waud Capital Partners is a leading growth-oriented private equity firm.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 15 | Linden Capital PartnersStrong evidence | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 16 | 79 | ||||
“Flexpoint Ford is a specialist private equity firm focused on financial services and adjacent verticals.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 17 | Wind Point PartnersStrong evidence | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 18 | RCP AdvisorsStrong evidence | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 19 | PPC Pritzker Private CapitalStrong evidence | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 20 | Morgan Street HoldingsPartial evidence | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 21 | 63 | ||||
“Chicago Pacific Founders (“CPF”) is a strategic healthcare investment firm with a focus on healthcare services.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 22 | Sterling PartnersIndirect evidence | 60 | |||
“Sterling Partners is an investment management platform.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 23 | Tyree & D'angelo PartnersStrong evidence | 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 4, 2026Thanks. The Data Team will review it. | |||||
| 24 | The Peakstone GroupStrong evidence | 58 | |||
“Peakstone is the trusted partner and leading force in the lower middle market U.S.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 25 | 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 4, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 321 lower middle market private equity firms based in Chicago, United States
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Lower middle market private equity firms based in Chicago, United States at a glance
As of Sep 4, 2026Companies by employee count
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 321 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 lower middle market private equity firms, 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 “lower middle market private equity firms”. 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 lower 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 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, 3,551 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 4, 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.
Lower middle market private equity firms by metro in the United States
- Lower middle market private equity firms in New York933
- Lower middle market private equity firms in Chicago321
- Lower middle market private equity firms in Dallas286
- Lower middle market private equity firms in Los Angeles221
- Lower middle market private equity firms in Boston183
- Lower middle market private equity firms in Houston179
- Lower middle market private equity firms in Austin167
- Lower middle market private equity firms in San Francisco161
- Lower middle market private equity firms in Miami153
- Lower middle market private equity firms in Atlanta142
- Lower middle market private equity firms in Denver102
- Lower middle market private equity firms in Charlotte89
- Lower middle market private equity firms in Greenwich65
- Lower middle market private equity firms in Washington58
- Lower middle market private equity firms in San Diego53
- Lower middle market private equity firms in Tampa53
- Lower middle market private equity firms in Nashville50
- Lower middle market private equity firms in Minneapolis46
- Lower middle market private equity firms in Newport Beach43
- Lower middle market private equity firms in Seattle43
- Lower middle market private equity firms in Cleveland40
- Lower middle market private equity firms in Philadelphia39
- Lower middle market private equity firms in Birmingham38
- Lower middle market private equity firms in Salt Lake City34
- Lower middle market private equity firms in Phoenix33
- Lower middle market private equity firms in Boca Raton32
- Lower middle market private equity firms in Santa Monica32
- Lower middle market private equity firms in Beverly Hills31
- Lower middle market private equity firms in New York City30
- Lower middle market private equity firms in West Palm Beach30
- Lower middle market private equity firms in Cincinnati29
- Lower middle market private equity firms in Stamford29
- Lower middle market private equity firms in Scottsdale28
- Lower middle market private equity firms in Pittsburgh26
- Lower middle market private equity firms in Columbus25
- Lower middle market private equity firms in Fort Lauderdale25
- Lower middle market private equity firms in Orlando25
Frequently asked
How many lower middle market private equity firms are there based in Chicago, United States?
RevenueBase identified 321 lower 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 lower middle market private equity firms?
New York leads with 933 headquartered companies, followed by Chicago (321) and Dallas (286).
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 3,551 verified decision-maker contacts tracked across these 321 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 4, 2026.
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Lower middle market private equity firms by geography
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- Lower middle market private equity firms based in France
- Lower middle market private equity firms based in Brazil
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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.
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