Company lists · Data refreshed September 2026

Top 25 Lower middle market investment firms based in Stamford, United States

Name: Lower middle market investment firms based in Stamford, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 33 companies tracked

RevenueBase identified 33 lower middle market investment firms headquartered in Stamford, United States as of September 2026 and tracks 745 professional contacts across them, including 354 with verified work emails. Across the United States, New York is the largest hub for this category (855 companies); Stamford has 33.

This list covers lower middle market investment firms headquartered in Stamford, 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 28, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

33Companies

745Contacts tracked

354Verified emails

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The 25 largest lower middle market investment firms based in Stamford, United States

Ranked by team size

Top 25 of 33 lower middle market investment firms based in Stamford, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to lower middle market investment firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Black Diamond Capital Management	Partial evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	51-200	273 contacts →
	Partial evidence “Black Diamond Capital Management (“BDCM”) is a privately held alternative asset management firm specializing in the global credit markets.” Source: RevenueBase Database · checked Sep 28, 2026
2	First Reserve	Partial evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	51-200	79 contacts →
	Partial evidence “Founded in 1983, First Reserve is a leading global private equity firm investing across energy, utility, and industrial markets.” Source: RevenueBase Database · checked Sep 28, 2026
3	MC Credit Partners LP	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	39 contacts →
	Strong evidence “MC Credit Partners LP ("MCCP") offers creative and comprehensive financing solutions to middle market companies.” Source: RevenueBase Database · checked Sep 28, 2026
4	Clearview Capital, L.P	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	38 contacts →
	Strong evidence “Founded in Clearview Capital is a private investment firm specializing in the acquisition and recapitalization of lower-middle market companies in North America.” Source: RevenueBase Database · checked Sep 28, 2026
5	Bank Street Group	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	35 contacts →
	Strong evidence “Bank Street is an independent investment banking firm providing a comprehensive array of financial advisory services to middle-market companies.” Source: RevenueBase Database · checked Sep 28, 2026
6	Avesi Partners	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	30 contacts →
	Indirect evidence “Avesi Partners is a private equity group that provides the expertise and resources to empower businesses to attain their full vision with confidence.” Source: RevenueBase Database · checked Sep 28, 2026
7	Gainline Capital Partners	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	1-10	26 contacts →
	Indirect evidence “Gainline Capital Partners is a private equity firm that invests in U.S.” Source: RevenueBase Database · checked Sep 28, 2026
8	Olympus Partners	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	23 contacts →
	Indirect evidence “Founded in 1988, Olympus manages over $12.0 billion on behalf of corporate pension plans, public retirement systems, university endowment funds, and the executives of Olympus'…” Source: RevenueBase Database · checked Sep 28, 2026
9	Stony Hill Advisors	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	23 contacts →
	Strong evidence “Stony Hill Advisors is a premier merger and acquisition advisory firm specializing in intermediary services for lower middle market companies and small business entrepreneurs.” Source: RevenueBase Database · checked Sep 28, 2026
10	Brookside Capital Partners	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “Brookside Capital Partners has invested over $1.5 billion across five funds since its founding in 2001.” Source: RevenueBase Database · checked Sep 28, 2026
11	Brooks, Houghton & Company, INC	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Strong evidence “Brooks, Houghton & Company, Inc.("BHC") is a merchant banking firm dedicated to providing investment banking services and direct investment to middle market private and public…” Source: RevenueBase Database · checked Sep 28, 2026
12	Longrange Capital	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Strong evidence “Founded in 2019, LongRange Capital was formed to take a longer-term perspective to investing and to build stronger and better middle market businesses through a company-focused…” Source: RevenueBase Database · checked Sep 28, 2026
13	Hamilton Robinson Capital Partners	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	1-10	15 contacts →
	Strong evidence “Hamilton Robinson Capital Partners is a lower-middle market private equity firm focused on making control investments in North American-based commercial service, distribution…” Source: RevenueBase Database · checked Sep 28, 2026
14	Strong Capital Markets	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	1-10	14 contacts →
	Strong evidence “Strong Capital Markets provides investment banking services for private companies and investment vehicles.” Source: RevenueBase Database · checked Sep 28, 2026
15	Cohen Private Ventures, LLC	Partial evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	1-10	13 contacts →
	Partial evidence “Cohen Private Ventures invests long-term capital, primarily in direct private investments and other opportunistic transactions, on behalf of Steven A.” Source: RevenueBase Database · checked Sep 28, 2026
16	Garmark Partners	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “Founded in 1997, GarMark Partners is one of the longest-tenured managers of private junior debt and structured equity capital in North America, with approximately $1.3 billion of…” Source: RevenueBase Database · checked Sep 28, 2026
17	AMA Capital Partners, LLC	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “Established in 1987, AMA is the only merchant banking partnership in the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
18	Drum Capital Management, LLC	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	8 contacts →
	Strong evidence “Drum Capital Management is a specialized investment management firm dedicated to deep value lower middle market investment opportunities, including special situations, turnaround…” Source: RevenueBase Database · checked Sep 28, 2026
19	Brookside Equity Partners	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Strong evidence “With roots dating back 40 years, Brookside Equity Partners makes strategic private equity investments in middle-market companies.” Source: RevenueBase Database · checked Sep 28, 2026
20	Waypoint Capital Partners	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Strong evidence “WayPoint is an operationally focused private equity firm purpose-built for the lower middle market with a family office heritage.” Source: RevenueBase Database · checked Sep 28, 2026
21	Compass Partners Capital, LLC	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “Compass Partners brings elite experience and focus to help companies seize 21st century opportunities.” Source: RevenueBase Database · checked Sep 28, 2026
22	Z2 Investment Management, LP	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “Z2 is an SEC-registered alternative investment management company focused on non-sponsored, low to middle market direct lending.” Source: RevenueBase Database · checked Sep 28, 2026
23	Belden Hill Partners	Partial evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Belden Hill Partners serves as an independent corporate finance and investment banking adviser to closely held businesses across the United States and Canada, with a unique focus…” Source: RevenueBase Database · checked Sep 28, 2026
24	Small Business Community Capital Sbcc	Strong evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Strong evidence “Small Business Community Capital II (SBCC), is a private equity and private debt impact fund that invests in small and lower middle market companies through customized capital…” Source: RevenueBase Database · checked Sep 28, 2026
25	FV Vantage	Partial evidence	Stamford, CT, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “FV Vantage is a financial solutions and investment company with a focus on debt and equity capital solutions to businesses doing $1M to $100M in gross revenue across the US.” Source: RevenueBase Database · checked Sep 28, 2026

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: lower middle market investment 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 lower middle market investment firms.
Partial evidence: Its own public description names part of lower middle market investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name lower middle market investment 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 33 lower middle market investment firms based in Stamford, United States

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Lower middle market investment firms based in Stamford, United States at a glance

As of Sep 28, 2026

47.5%Verified-email coverage

22.6Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Stamford, so it is reported there. Company counts and contact totals on this page are exact for Stamford, over 33 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 investment 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 Stamford, United States whose own description of what they do matches “lower middle market investment 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 lower middle market investment 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 lower middle market investment firms, and records with no verified work email. Companies headquartered outside Stamford 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, 354 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 28, 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 investment firms by metro in the United States

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 lower middle market investment 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 lower middle market investment firms are there based in Stamford, United States?

RevenueBase identified 33 lower middle market investment firms headquartered in Stamford, 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?

Black Diamond Capital Management, headquartered in Stamford, tops this list with the largest team on record.

Which city in the United States has the most lower middle market investment firms?

New York leads the United States with 855 headquartered companies, followed by Chicago (276) and Dallas (204). Stamford has 33.

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 354 verified decision-maker contacts tracked across these 33 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 28, 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.