Company lists · Data refreshed September 2026

Top 25 Lower middle market private equity firms based in San Francisco, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 161 companies tracked

RevenueBase identified 161 lower middle market private equity firms headquartered in San Francisco, United States as of September 2026 and tracks 6,319 professional contacts across them, including 3,518 with verified work emails. New York is the largest hub.

This list covers lower middle market private equity firms headquartered in San Francisco, 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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

161Companies

6,319Contacts tracked

3,518Verified emails

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The 25 largest lower middle market private equity firms based in San Francisco, United States

Ranked by team size

Top 25 of 161 lower middle market private equity firms based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names lower middle market private equity firms: 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	TPGIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,979
	“TPG (Nasdaq: TPG) is a leading global alternative asset management firm, founded in San Francisco in 1992, with $306 billion of assets under management and investment and…” Source: company website · checked Sep 4, 2026
2	Sixth StreetIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	501-1,000	802
	“Sixth Street is a global investment firm with over $135 billion in assets under management and committed capital.* The firm uses its long-term flexible capital, data-enabled…” Source: company website · checked Sep 4, 2026
3	Alpine InvestorsStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	278
	“Alpine Investors is a people-driven private equity firm that invests in software and services businesses.” Source: company website · checked Sep 4, 2026
4	Hellman & FriedmanStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	220
	“Founded in 1984, Hellman & Friedman (H&F) is one of the most experienced private equity investment firms operating today.” Source: company website · checked Sep 4, 2026
5	Francisco PartnersIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	215
	“Francisco Partners is a leading global investment firm that specializes in partnering with technology and technology-enabled businesses.” Source: company website · checked Sep 4, 2026
6	Gryphon InvestorsStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	211
	“Gryphon Investors is a leading middle-market private investment firm focused on building and growing profitable, market-leading companies in the Business Services, Consumer…” Source: company website · checked Sep 4, 2026
7	FTV CapitalPartial evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	135
	“FTV Capital is a growth equity investment firm that has raised over $10.2 billion to invest in high-growth companies offering a range of innovative solutions in financial…” Source: company website · checked Sep 4, 2026
8	Golden Gate CapitalStrong evidence	San Francisco, United StatesHQ checked Sep 4, 2026	51-200	126
	“Golden Gate Capital is a San Francisco-based private equity investment firm with approximately $20 billion in cumulative committed capital.” Source: company website · checked Sep 4, 2026
9	FFL PartnersStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	11-50	118
	“FFL Partners is a leading middle-market private equity firm that has been investing in high-quality companies since 1997.” Source: company website · checked Sep 4, 2026
10	US CapitalStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	112
	“Founded in 1998, US Capital Global offers a range of advanced financial solutions, including debt, equity, and investment products customized for middle-market enterprises and…” Source: company website · checked Sep 4, 2026
11	Turn River CapitalStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	106
	“Turn/River Capital is a private equity firm that applies a proprietary growth engineering strategy to investing, partnering with software businesses to accelerate growth and build…” Source: company website · checked Sep 4, 2026
12	Percheron CapitalStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	96
	“Percheron Capital is the largest private equity firm focused on essential services – the businesses that keep America running.” Source: company website · checked Sep 4, 2026
13	JH PartnersStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	11-50	96
	“JH Partners, LLC ("JH Partners" or "JHP") is a San Francisco-based private equity firm focused on building sustainable, long-term equity value in consumer and marketing-driven…” Source: company website · checked Sep 4, 2026
14	Vector Capital ManagementStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	89
	“Vector Capital is a leading, San Francisco-based global private equity and credit investment firm focused on transformative investments in technology and technology-enabled…” Source: company website · checked Sep 4, 2026
15	Dragoneer Investment GroupIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	85
	“Dragoneer is a growth-oriented investment firm with over $35 billion in assets under management.” Source: company website · checked Sep 4, 2026
16	Genstar CapitalStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	11-50	84
	“Genstar Capital is a leading middle-market private equity firm, investing in high quality companies for over 30 years.” Source: company website · checked Sep 4, 2026
17	VMG PartnersIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	61
	“VMG is a leading investment firm that backs branded consumer product, service, and technology companies.” Source: company website · checked Sep 4, 2026
18	Atel Capital GroupIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	56
	“For half a century, ATEL Capital Group has financed the companies transforming our economy-deploying capital to more than businesses globally.” Source: company website · checked Sep 4, 2026
19	Meritage Group LPIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	47
	“Meritage Group LP is a fundamentally oriented investment firm backed by evergreen, flexible capital.” Source: company website · checked Sep 4, 2026
20	Banneker PartnersIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	11-50	44
	“Founded in 2016, Banneker is dedicated to empowering management teams on their journey to build exceptional software companies.” Source: company website · checked Sep 4, 2026
21	Martis CapitalStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	11-50	35
	“Martis Capital is a middle-market private equity fund focused exclusively on the North American healthcare industry.” Source: company website · checked Sep 4, 2026
22	Main Post PartnersStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	11-50	33
	“Main Post Partners is a private equity investment firm focused on investing $50 – $250+ million in high-growth companies across the consumer value chain.” Source: company website · checked Sep 4, 2026
23	Calera CapitalStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	11-50	33
	“Founded in 1991, Calera Capital has invested over $5 billion of equity capital in the middle market, predominantly in founder, family, and management-owned businesses across a…” Source: company website · checked Sep 4, 2026
24	Tree Line Capital PartnersStrong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	11-50	32
	“Tree Line Capital Partners is a private credit asset management firm focused on direct lending to the lower middle-market.” Source: company website · checked Sep 4, 2026
25	True WindIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	11-50	32
	“True Wind is an investment firm that helps technology businesses transform industries.” Source: company website · checked Sep 4, 2026

Showing 25 of 161 lower middle market private equity firms based in San Francisco, United States

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Lower middle market private equity firms based in San Francisco, United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 933 HQs

Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

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 San Francisco, over 161 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 San Francisco, 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 San Francisco 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, 3,518 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

Frequently asked

How many lower middle market private equity firms are there based in San Francisco, United States?

RevenueBase identified 161 lower middle market private equity firms headquartered in San Francisco, 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?

TPG, headquartered in San Francisco, 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 3,518 verified decision-maker contacts tracked across these 161 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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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.