Company lists · Data refreshed September 2026
Top 23 Private equity portfolio companies based in Seattle, United States
RevenueBase identified 42 private equity portfolio companies headquartered in Seattle, United States as of September 2026 and tracks 169 professional contacts across them, including 78 with verified work emails. New York is the largest hub.
This list covers private equity portfolio companies 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 23 largest private equity portfolio companies based in Seattle, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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. | |||||
| 2 | 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. | |||||
| 3 | Manzanita CapitalIndirect 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. | |||||
| 4 | 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. | |||||
| 5 | 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. | |||||
| 6 | Techstrat LTDIndirect evidence | 5 | |||
“At TechStrat we help entrepreneurs, CEOs and shareholders grow and fund technology businesses.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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. | |||||
| 8 | 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. | |||||
| 9 | 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. | |||||
| 10 | 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. | |||||
| 11 | 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. | |||||
| 12 | 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. | |||||
| 13 | 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. | |||||
| 14 | 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. | |||||
| 15 | 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. | |||||
| 16 | Shipyard Cascade CapitalStrong 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. | |||||
| 17 | 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. | |||||
| 18 | 2 | ||||
“Investment firm” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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. | |||||
| 20 | 1 | ||||
“Long-term growth capital partner helping field-service operators scale” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 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. | |||||
| 22 | Eschaton CapitalPartial evidence | 1 | |||
“Eschaton Capital is a private investment firm based in Seattle.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | KAM CapitalIndirect evidence | 1 | |||
“We are looking to acquire accounting and bookkeeping firms in the US (Washington/Oregon) with revenue between $1.2M -$5M.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 23 of 42 private equity portfolio companies based in Seattle, United States
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Private equity portfolio companies 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 42 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 private equity portfolio companies, 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 “private equity portfolio companies”. 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 private equity portfolio companies, 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, 78 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.
Private equity portfolio companies by metro in the United States
- Private equity portfolio companies in New York913
- Private equity portfolio companies in Chicago289
- Private equity portfolio companies in San Francisco230
- Private equity portfolio companies in Dallas229
- Private equity portfolio companies in Los Angeles213
- Private equity portfolio companies in Boston180
- Private equity portfolio companies in Houston152
- Private equity portfolio companies in Austin151
- Private equity portfolio companies in Miami148
- Private equity portfolio companies in Atlanta124
- Private equity portfolio companies in Denver92
- Private equity portfolio companies in Charlotte71
- Private equity portfolio companies in Washington70
- Private equity portfolio companies in San Diego52
- Private equity portfolio companies in Greenwich48
- Private equity portfolio companies in Tampa46
- Private equity portfolio companies in Nashville42
- Private equity portfolio companies in Seattle42
- Private equity portfolio companies in Cleveland40
- Private equity portfolio companies in Minneapolis40
- Private equity portfolio companies in Birmingham39
- Private equity portfolio companies in Newport Beach39
- Private equity portfolio companies in Philadelphia39
- Private equity portfolio companies in Menlo Park38
- Private equity portfolio companies in New York City38
- Private equity portfolio companies in Beverly Hills37
- Private equity portfolio companies in Palo Alto37
- Private equity portfolio companies in Salt Lake City33
- Private equity portfolio companies in Scottsdale33
- Private equity portfolio companies in Phoenix31
- Private equity portfolio companies in Santa Monica29
- Private equity portfolio companies in Boca Raton27
- Private equity portfolio companies in Fort Lauderdale26
- Private equity portfolio companies in West Palm Beach25
Frequently asked
How many private equity portfolio companies are there based in Seattle, United States?
RevenueBase identified 42 private equity portfolio companies 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?
Rainier Partners, headquartered in Seattle, tops this list with the largest team on record.
Which city has the most private equity portfolio companies?
New York leads with 913 headquartered companies, followed by Chicago (289) and San Francisco (230).
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 78 verified decision-maker contacts tracked across these 42 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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