Company lists · Data refreshed September 2026

Top 25 Operational improvement equity firms based in the United States

Name: Operational improvement equity firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 4,010 companies tracked

RevenueBase identified 4,010 operational improvement equity firms headquartered in the United States as of September 2026 and tracks 57,624 professional contacts across them, including 32,770 with verified work emails. New York is the largest hub.

This list covers operational improvement equity firms headquartered in the 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 20, 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 20, 2026 86% judged on-target in blind review

4,010Companies

57,624Contacts tracked

32,770Verified emails

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The 25 largest operational improvement equity firms based in the United States

Ranked by team size

Top 25 of 4,010 operational improvement equity firms based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to operational improvement equity 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	Alvarez & Marsal	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	10001+	13,099 contacts →
	Indirect evidence “Alvarez & Marsal is a leading global professional services firm dedicated to helping organizations tackle their most complex business issues, maximize stakeholder value, and…” Source: RevenueBase Database · checked Sep 20, 2026
2	L.E.K. Consulting	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1,001-5,000	4,093 contacts →
	Indirect evidence “L.E.K.” Source: RevenueBase Database · checked Sep 20, 2026
3	H.I.G. Capital	Indirect evidence	Miami, FL, United StatesHQ checked Sep 20, 2026	501-1,000	1,301 contacts →
	Indirect evidence “H.I.G.” Source: RevenueBase Database · checked Sep 20, 2026
4	Riveron	Partial evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,160 contacts →
	Partial evidence “With over 1,200 professionals across 18 international offices, Riveron delivers tailored solutions for CFOs, private equity firms, and key stakeholders.” Source: RevenueBase Database · checked Sep 20, 2026
5	Advent	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	501-1,000	1,025 contacts →
	Partial evidence “Advent is a leading global private equity investor committed to working in partnership with management teams, entrepreneurs, and founders to help transform businesses.” Source: RevenueBase Database · checked Sep 20, 2026
6	TA Associates	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	881 contacts →
	Partial evidence “TA is a leading global private equity firm focused on scaling growth in profitable companies.” Source: RevenueBase Database · checked Sep 20, 2026
7	PSG	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	513 contacts →
	Partial evidence “PSG is a growth equity firm that partners with software and technology-enabled services companies to help them navigate transformational growth, capitalize on strategic…” Source: RevenueBase Database · checked Sep 20, 2026
8	SPARQ	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	501-1,000	487 contacts →
	Indirect evidence “Sparq is an economic performance engineering partner, built for the age of AI.” Source: RevenueBase Database · checked Sep 20, 2026
9	The Riverside Company	Indirect evidence	New York City, NY, United StatesHQ checked Sep 20, 2026	201-500	447 contacts →
	Indirect evidence “The Riverside Company is a global investment firm focused on being one of the leading private capital options for business owners and employees at the smaller end of the middle…” Source: RevenueBase Database · checked Sep 20, 2026
10	Cd&r	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	385 contacts →
	Indirect evidence “Founded in 1978, CD & R is an investment firm with an investment strategy predicated on building stronger, more profitable businesses.” Source: RevenueBase Database · checked Sep 20, 2026
11	Shore Capital Partners	Partial evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	51-200	327 contacts →
	Partial 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 20, 2026
12	Alpha Alternatives	Partial evidence	New York, United StatesHQ checked Sep 20, 2026	201-500	301 contacts →
	Partial evidence “Alpha Alternatives is the specialist alternatives consulting division of Alpha FMC, dedicated to creating value for private markets clients-including Private Equity, Private Debt…” Source: RevenueBase Database · checked Sep 20, 2026
13	GGG Partners, LLC Previously Grisanti, Galef & Goldress	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	n/a	283 contacts →
	Partial evidence “Partners, LLC has transformed under-performing companies into high performance operations for more than 60 years.” Source: RevenueBase Database · checked Sep 20, 2026
14	Alpine Investors	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	51-200	278 contacts →
	Partial evidence “Alpine Investors is a people-driven private equity firm that invests in software and services businesses.” Source: RevenueBase Database · checked Sep 20, 2026
15	Clearlake Capital Group	Indirect evidence	Santa Monica, CA, United StatesHQ checked Sep 20, 2026	51-200	266 contacts →
	Indirect evidence “Clearlake Capital is a leading global alternative asset manager founded in 2006 with over $185 billion of assets under management.” Source: RevenueBase Database · checked Sep 20, 2026
16	Berkshire Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	255 contacts →
	Partial evidence “Berkshire Partners is a 100% employee-owned, multi-sector specialist investor in private and public equity, with a focus on North American-based, middle-market companies.” Source: RevenueBase Database · checked Sep 20, 2026
17	Gtcr LLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	51-200	237 contacts →
	Partial 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 20, 2026
18	Charlesbank Capital Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	236 contacts →
	Indirect evidence “Based in Boston and New York City, Charlesbank is a leading middle-market private investment firm with $21.5 billion in assets under management as of 3/31/2026.” Source: RevenueBase Database · checked Sep 20, 2026
19	American Securities	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	220 contacts →
	Indirect evidence “Founded in 1994, American Securities is a leading U.S.” Source: RevenueBase Database · checked Sep 20, 2026
20	USC Consulting Group	Strong evidence	Tampa, FL, United StatesHQ checked Sep 20, 2026	51-200	204 contacts →
	Strong evidence “USC Consulting Group (USCCG) is an operations management and process improvement firm that empowers your people.” Source: RevenueBase Database · checked Sep 20, 2026
21	FDG Associates	Partial evidence	New York, CA, United StatesHQ checked Sep 20, 2026	n/a	199 contacts →
	Partial evidence “FdG Associates is a leading private equity investment firm with a strong track record of partnering with management in recapitalizations and management buyouts of middle-market…” Source: RevenueBase Database · checked Sep 20, 2026
22	Dpo&co.	Partial evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	51-200	187 contacts →
	Partial evidence “DPO & Co specializes in helping Private Equity firms and their portfolio companies gain fact-based insights during the diligence process and realize post-close synergies and value…” Source: RevenueBase Database · checked Sep 20, 2026
23	Maine Pointe	Strong evidence	Bloomfield, NJ, United StatesHQ checked Sep 20, 2026	51-200	178 contacts →
	Strong evidence “Maine Pointe, a member of the SGS Group, is a global supply chain and operations consulting firm trusted by many chief executives and private equity firms to drive compelling…” Source: RevenueBase Database · checked Sep 20, 2026
24	Portage Point Partners	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	201-500	173 contacts →
	Indirect evidence “Portage Point is a business advisory, interim management and investment banking firm intensely focused on the middle market.” Source: RevenueBase Database · checked Sep 20, 2026
25	Star Mountain Capital	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	172 contacts →
	Indirect evidence “Bringing large market expertise to smaller companies, Star Mountain’s philosophies include a data-driven and systematic approach to investing.” Source: RevenueBase Database · checked Sep 20, 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: operational improvement 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 operational improvement equity firms.
Partial evidence: Its own public description names part of operational improvement equity firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name operational improvement 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 4,010 operational improvement equity firms based in the United States

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Operational improvement equity firms based in the United States at a glance

As of Sep 20, 2026

56.9%Verified-email coverage

14.4Average contacts per company

1-10Median size (employees)

10.8%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

2,837

11-50

916

51-200

189

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,010 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 operational improvement 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 the United States whose own description of what they do matches “operational improvement 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 operational improvement 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 operational improvement equity firms, and records with no verified work email. Companies headquartered outside United States 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, 32,770 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 20, 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.

Operational improvement equity firms by metro

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 operational improvement 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 operational improvement equity firms are there based in the United States?

RevenueBase identified 4,010 operational improvement equity firms headquartered in the 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?

Alvarez & Marsal, headquartered in New York, tops this list with the largest team on record.

Which city has the most operational improvement equity firms?

New York leads with 432 headquartered companies, followed by Chicago (218) and Dallas (149).

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 32,770 verified decision-maker contacts tracked across these 4,010 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 20, 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.