Company lists · Data refreshed September 2026
Top 25 Lower middle market pe firms based in San Francisco, United States
RevenueBase identified 86 lower middle market pe firms headquartered in San Francisco, United States as of September 2026 and tracks 1,566 professional contacts across them, including 957 with verified work emails. New York is the largest hub.
This list covers lower middle market pe 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, 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.
The 25 largest lower middle market pe firms based in San Francisco, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 220 contacts → | ||||
Indirect evidence “Founded in 1984, Hellman & Friedman (H&F) is one of the most experienced private equity investment firms operating today.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 135 contacts → | ||||
Indirect evidence “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: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 126 contacts → | ||||
Indirect evidence “Golden Gate Capital is a San Francisco-based private equity investment firm with approximately $20 billion in cumulative committed capital.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 106 contacts → | ||||
Indirect evidence “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: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 96 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 89 contacts → | ||||
Indirect evidence “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: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 85 contacts → | ||||
Indirect evidence “Dragoneer is a growth-oriented investment firm with over $35 billion in assets under management.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 84 contacts → | ||||
Strong evidence “Genstar Capital is a leading middle-market private equity firm, investing in high quality companies for over 30 years.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 44 contacts → | ||||
Indirect evidence “Founded in 2016, Banneker is dedicated to empowering management teams on their journey to build exceptional software companies.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 35 contacts → | ||||
Strong evidence “Martis Capital is a middle-market private equity fund focused exclusively on the North American healthcare industry.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 33 contacts → | ||||
Indirect evidence “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: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 33 contacts → | ||||
Strong evidence “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: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 32 contacts → | ||||
Strong evidence “Tree Line Capital Partners is a private credit asset management firm focused on direct lending to the lower middle-market.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 30 contacts → | ||||
Strong evidence “IGP is a San Francisco-based specialist private investment partnership focused exclusively on acquiring middle-market industrial businesses.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 28 contacts → | ||||
Strong evidence “Knox Lane is a San Francisco-based middle-market investment firm, comprised of investors and operators from blue-chip backgrounds that have a long history of working together…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 28 contacts → | ||||
Indirect evidence “Housatonic Partners is a private equity firm investing in high growth, recurring revenue service companies operating in a number of industries including healthcare, software, and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 25 contacts → | ||||
Indirect evidence “Carrick Capital Partners is the first stop for entrepreneurs and business owners who are seeking unmatched expertise to help their businesses scale.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 18 contacts → | ||||
Indirect evidence “Valeas Capital Partners is a San Francisco-based growth-buyout private equity firm focused on partnering with founders and CEOs.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 16 contacts → | ||||
Indirect evidence “Castle Crow is a merchant banking group specializing in buyside private equity investments and now has affiliated deal team professionals in five North American locations…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 14 contacts → | ||||
Partial evidence “Nexa Equity is a San Francisco-based private equity firm partnering with founder-led high-growth vertical SaaS companies that address markets underserved by technology to create…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 14 contacts → | ||||
Indirect evidence “Ponte Partners is an investment management firm headquartered in San Francisco, California, which collaborates with institutional and private investors, fund managers and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 13 contacts → | ||||
Indirect evidence “An innovative private equity firm built to capitalize on our investing experience and the operating expertise of our industry advisers to accelerate the growth of leading consumer…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 12 contacts → | ||||
Strong evidence “P4G Capital Management is a lower middle market, operationally focused private equity firm.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 12 contacts → | ||||
Indirect evidence “Spotlight Equity Partners is a private equity firm focused on acquiring controlling interests in software and technology-enabled services companies headquartered in the United…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 11 contacts → | ||||
Strong evidence “San Francisco Equity Partners is a private equity firm focused exclusively on partnering with middle market companies across the consumer value chain.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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 pe 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 pe firms.
- Partial evidence
- Its own public description names part of lower middle market pe 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 pe 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 86 lower middle market pe firms based in San Francisco, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 957 reachable decision-makers.
Free signup · no credit card
Lower middle market pe firms based in San Francisco, United States at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for San Francisco, so it is reported there. Company counts and contact totals on this page are exact for San Francisco, over 86 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 pe 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 San Francisco, United States whose own description of what they do matches “lower middle market pe 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 pe 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 pe 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 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, 957 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.
Lower middle market pe firms by metro in the United States
- Lower middle market pe firms in New York503
- Lower middle market pe firms in Chicago213
- Lower middle market pe firms in Dallas143
- Lower middle market pe firms in Los Angeles130
- Lower middle market pe firms in Boston113
- Lower middle market pe firms in Houston97
- Lower middle market pe firms in Austin88
- Lower middle market pe firms in San Francisco86
- Lower middle market pe firms in Atlanta84
- Lower middle market pe firms in Miami74
- Lower middle market pe firms in Charlotte58
- Lower middle market pe firms in Denver54
- Lower middle market pe firms in Greenwich43
- Lower middle market pe firms in Minneapolis36
- Lower middle market pe firms in Cleveland31
- Lower middle market pe firms in Nashville29
- Lower middle market pe firms in San Diego28
- Lower middle market pe firms in Birmingham26
- Lower middle market pe firms in Tampa26
- Lower middle market pe firms in Washington25
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 pe 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 pe firms are there based in San Francisco, United States?
RevenueBase identified 86 lower middle market pe 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?
Hellman & Friedman, headquartered in San Francisco, tops this list with the largest team on record.
Which city has the most lower middle market pe firms?
New York leads with 503 headquartered companies, followed by Chicago (213) and Dallas (143).
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 957 verified decision-maker contacts tracked across these 86 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.
Ready to reach these companies? Verified emails and direct dials for all 86 lower middle market pe firms based in San Francisco, United States. Start with a free account, no credit card.
Download this list →Related lists
Lower middle market pe firms by geography
- Lower middle market pe firms based in Montreal, Canada
- Lower middle market pe firms based in Toronto, Canada
- Lower middle market pe firms based in Vancouver, Canada
- Lower middle market pe firms based in Atlanta, United States
- Lower middle market pe firms based in Austin, United States
- Lower middle market pe firms based in Birmingham, United States
- Lower middle market pe firms based in Boston, United States
- Lower middle market pe firms based in Charlotte, United States
- Lower middle market pe firms based in Chicago, United States
- Lower middle market pe firms based in Cleveland, United States
- Lower middle market pe firms based in Dallas, United States
- Lower middle market pe firms based in Denver, United States
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Lower middle market pe firms based in Montreal, Canada
- Lower middle market pe firms based in Toronto, Canada
- Lower middle market pe firms based in Vancouver, Canada
- Lower middle market pe firms based in Atlanta, United States
- Lower middle market pe firms based in Austin, United States
- Lower middle market pe firms based in Birmingham, United States