Company lists · Data refreshed September 2026
Top 24 Middle market private equity firms based in Seattle, United States
RevenueBase identified 43 middle market private equity firms headquartered in Seattle, United States as of September 2026 and tracks 349 professional contacts across them, including 146 with verified work emails. New York is the largest hub.
This list covers middle market private equity firms headquartered in Seattle, 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 5, 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.
The 24 largest middle market private equity firms based in Seattle, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 151 | ||||
“Since 1991, Frazier Healthcare Partners leverages the experience of its team of investment professionals, Center of Excellence, Senior Advisors and Executives in Residence to…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | Laird Norton CompanyIndirect evidence | 33 | |||
“We are a diversified company that is investing for the future.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | Rainier PartnersStrong evidence | 29 | |||
“Rainier Partners is a private equity firm rooted in the Pacific Northwest that invests in businesses in the lower middle market, primarily in the Western US and Canada.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | Pike Street CapitalStrong evidence | 12 | |||
“Based in Seattle, Pike Street Capital is a private equity firm focused on lower middle market growth buyouts.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | Manzanita CapitalPartial evidence | 12 | |||
“Manzanita Capital invests in entrepreneurs and emerging brands who are poised to enter new markets.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 8 | ||||
“Columbia River Partners (CRP) is a private investment firm integrating private equity, venture capital and special situations.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 8 | ||||
“Archon Capital Management LLC ("Archon") was established in 2004 by Constantinos Christofilis as a privately held investment firm.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | Valve Capital PartnersStrong evidence | 5 | |||
“We are a private investment firm with a deep passion for providing excellent returns for our partners and accredited investors in the the lower middle market.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | Zenith Growth PartnersIndirect evidence | 5 | |||
“Zenith Growth Partners was established to find, acquire, and grow an outstanding business for the long term.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | Montlake CapitalStrong evidence | 5 | |||
“Montlake Capital is a Pacific Northwest-based private equity firm with extensive investing and operating experience.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | Skylight CapitalIndirect evidence | 5 | |||
“Based in Seattle, Washington, Skylight Capital was formed to invest in or acquire companies in the Western U.S.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 4 | ||||
“Frontbridge Capital (“FBC”) is a private investment and advisory firm serving growth-stage companies in the innovation economy, primarily in the technology, media, and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | Westward PartnersPartial evidence | 4 | |||
“Westward Partners is a private investment firm focused on producing attractive long-term returns through alternative asset investments.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | Ranch Creek Partners, LLCStrong evidence | 3 | |||
“Ranch Creek Partners is a private equity investment firm focused principally on acquiring control equity positions in public and private companies in the middle market.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 3 | ||||
“Gaudium Capital was founded in 2018 with a focus on private equity in the technology sector.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 3 | ||||
“Evergreen Pacific Partners is a $700 million private equity firm with a focus on investing in outstanding middle market businesses.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 2 | ||||
“Due West Partners is a private investment firm focused on long-term value creation through much more than capital.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | Shipyard Cascade CapitalPartial evidence | 2 | |||
“Shipyard Cascade Capital is a privately-held investment firm, managing a portfolio of direct investments as well as partnerships with many leading investment managers.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | CuriousIndirect evidence | 2 | |||
“Curious is a long term holding company and investment firm that buys and grows software companies with empathy.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2 | ||||
“Investment firm” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1 | ||||
“Ackerley Partners LLC is a venture capital & private equity company based out of Seattle, Washington, United States.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1 | ||||
“Long-term growth capital partner helping field-service operators scale” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | Kent Hill CapitalIndirect evidence | 1 | |||
“Kent Hill Capital is seeking to acquire a business in the Pacific Northwest that we will operate and grow for years to come.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 | ||||
“Graham Street Capital seeks to acquire and actively manage small to mid-sized businesses in the Pacific Northwest.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 24 of 43 middle market private equity firms based in Seattle, United States
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Middle market private equity firms based in Seattle, United States at a glance
As of Sep 5, 2026Companies by employee count
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 Seattle, over 43 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 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 Seattle, 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.
- 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 Seattle 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, 146 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 5, 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 Greenwich67
- Middle market private equity firms in Washington60
- Middle market private equity firms in San Diego52
- 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
How many middle market private equity firms are there based in Seattle, United States?
RevenueBase identified 43 middle market private equity firms headquartered in Seattle, 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?
Frazier Healthcare Partners, headquartered in Seattle, tops this list with the largest team on record.
Which city has the most middle market private equity firms?
New York leads with 945 headquartered companies, followed by Chicago (319) and Dallas (285).
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 146 verified decision-maker contacts tracked across these 43 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 5, 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.
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