Company lists · Data refreshed September 2026
Top 25 Middle market private equity firms based in San Diego, United States
RevenueBase identified 52 middle market private equity firms headquartered in San Diego, United States as of September 2026 and tracks 340 professional contacts across them, including 151 with verified work emails. Across the United States, New York is the largest hub for this category (945 companies); San Diego has 52.
This list covers middle market private equity firms headquartered in San Diego, 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 14, 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 middle market private equity firms based in San Diego, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 64 contacts → | ||||
Strong evidence “Neos Partners is a middle-market investment firm focused on second-order investing in the energy transition and critical infrastructure sectors.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 28 contacts → | ||||
Strong evidence “Based in San Diego, Seaside Equity Partners is a growth-oriented and operationally focused private equity firm that seeks to provide capital, resources and strategic support to…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 19 contacts → | ||||
Partial evidence “Interwest Capital is a privately-held firm founded in early 2003 by executives with diversified backgrounds and extensive knowledge in the real estate and financial industries.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 15 contacts → | ||||
Strong evidence “Gerber Goldschmidt Group is a premier investment and international private equity firm established in 1920.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 15 contacts → | ||||
Indirect evidence “Welcome to Allied HOA Partners.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 14 contacts → | ||||
Indirect evidence “Castle Creek is an alternative asset management firm focused on the community banking industry.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 14 contacts → | ||||
Partial evidence “Cypress Ascendant is a highly diversified, small market, boutique investment group.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 13 contacts → | ||||
Strong evidence “Accord is a San Diego, CA based private equity firm focused on partnering with management teams and founders to seek to create value and transformative growth.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 13 contacts → | ||||
Strong evidence “Shoreline Partners is a Mergers and Acquisitions Advisory firm serving private owners of lower middle market businesses.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 9 contacts → | ||||
Strong evidence “Gateway Partners, Inc.("GPI") is a specialized buy-side mergers and acquisitions firm serving the middle market.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 7 contacts → | ||||
Indirect evidence “LLJ VENTURES, LLC is a company based out of 401 B ST STE 920, SAN DIEGO, California, United States.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 7 contacts → | ||||
Partial evidence “TVC Capital is an operator-led growth equity firm focused on investments in and acquisitions of software companies.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 5 contacts → | ||||
Strong evidence “Verde Equity Partners is a private equity firm specializing in control buyouts of lower middle-market businesses and property services investments in the Western U.S.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 5 contacts → | ||||
Indirect evidence “At Persient, M&A is our singular focus.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 contacts → | ||||
Strong evidence “CapitalSphere helps middle market business owners meet private equity investors with the right resources to help their companies grow.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 4 contacts → | ||||
Strong evidence “Sunset Coast Partners is an independent sponsor firm focused on acquisitions in the lower middle market.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4 contacts → | ||||
Indirect evidence “We invest at the inflection point of accelerating growth, at every stage of a company's evolution.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3 contacts → | ||||
Strong evidence “Barrel Rate seeks to generate an outsized multiple of capital by partnering with private equity general partners and independent sponsors who are able to identify proprietary…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 2 contacts → | ||||
Strong evidence “ValueStreet is a private equity firm investing in quality small businesses, generating between $500k-$2M in annual cash flow, with the potential to grow indefinitely in the future.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2 contacts → | ||||
Indirect evidence “CaribVentures is a family owned investment and operating fund committed to building exceptional companies primarily in the SaaS, artificial intelligence, digital media and B2B…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1 contacts → | ||||
Strong evidence “Cloudbreak Capital is a global private equity firm, serving clients in several areas including technology, real estate, energy, healthcare, business services, manufacturing…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1 contacts → | ||||
Indirect evidence “DePrima Ventures, was founded in 2001.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Partial evidence “IndyCal Holdings is a private investment firm that focuses on acquiring and investing in small-to-medium sized businesses across the United States.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Indirect evidence “Founders of companies don’t fit into perfect circles or squares.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Strong evidence “Morpho Capital is a private equity investments firm focused on supporting scalable and sustainable businesses in the lower middle-market that have a proven businesses model and…” Source: RevenueBase Database · checked Sep 14, 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: middle market private 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 middle market private equity firms.
- Partial evidence
- Its own public description names part of middle market private equity firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name middle market private 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 52 middle market private equity firms based in San Diego, United States
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Middle market private equity firms based in San Diego, United States at a glance
As of Sep 14, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for San Diego, so it is reported there. Company counts and contact totals on this page are exact for San Diego, over 52 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 middle market private 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 San Diego, United States whose own description of what they do matches “middle market private 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 middle market private 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 middle market private equity firms, and records with no verified work email. Companies headquartered outside San Diego 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, 151 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 14, 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.
Middle market private equity firms by metro in the United States
- Middle market private equity firms in New York945
- Middle market private equity firms in Chicago319
- Middle market private equity firms in Dallas285
- Middle market private equity firms in Los Angeles224
- Middle market private equity firms in Houston190
- Middle market private equity firms in Boston185
- Middle market private equity firms in San Francisco168
- Middle market private equity firms in Austin167
- Middle market private equity firms in Miami160
- Middle market private equity firms in Atlanta140
- Middle market private equity firms in Denver104
- Middle market private equity firms in Charlotte86
- Middle market private equity firms in Washington60
- Middle market private equity firms in Tampa51
- Middle market private equity firms in Nashville50
- Middle market private equity firms in Newport Beach47
- Middle market private equity firms in Minneapolis45
- Middle market private equity firms in Seattle43
- Middle market private equity firms in Cleveland40
- Middle market private equity firms in Philadelphia39
- Middle market private equity firms in Salt Lake City37
- Middle market private equity firms in Birmingham36
- Middle market private equity firms in Santa Monica33
- Middle market private equity firms in Beverly Hills32
- Middle market private equity firms in West Palm Beach32
- Middle market private equity firms in Boca Raton31
- Middle market private equity firms in New York City30
- Middle market private equity firms in Phoenix30
- Middle market private equity firms in Scottsdale30
- Middle market private equity firms in Cincinnati29
- Middle market private equity firms in Stamford29
- Middle market private equity firms in Las Vegas26
- Middle market private equity firms in Palo Alto26
- Middle market private equity firms in Fort Lauderdale25
- Middle market private equity firms in Orlando25
- Middle market private equity firms in Pittsburgh25
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 middle market private 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 middle market private equity firms are there based in San Diego, United States?
RevenueBase identified 52 middle market private equity firms headquartered in San Diego, 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?
Neos Partners, headquartered in San Diego, tops this list with the largest team on record.
Which city in the United States has the most middle market private equity firms?
New York leads the United States with 945 headquartered companies, followed by Chicago (319) and Dallas (285). San Diego has 52.
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 151 verified decision-maker contacts tracked across these 52 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 14, 2026.
Ready to reach these companies? Verified emails and direct dials for all 52 middle market private equity firms based in San Diego, United States. Start with a free account, no credit card.
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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.
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