Company lists · Data refreshed September 2026

Top 25 Private investment companies based in Washington, United States

Name: Private investment companies based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 46 companies tracked

RevenueBase identified 46 private investment companies headquartered in Washington, United States as of September 2026 and tracks 3,147 professional contacts across them, including 1,721 with verified work emails. New York is the largest hub.

This list covers private investment companies headquartered in Washington, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

46Companies

3,147Contacts tracked

1,721Verified emails

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The 25 largest private investment companies based in Washington, United States

Ranked by team size

Top 25 of 46 private investment companies based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to private investment companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	The Carlyle Group	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,515 contacts →
	Strong evidence “Carlyle (NASDAQ: CG) is a global investment firm with deep industry expertise that deploys private capital across three business segments: Global Private Equity, Global Credit…” Source: RevenueBase Database · checked Sep 20, 2026
2	JMI Equity	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	152 contacts →
	Indirect evidence “Founded in 1992, JMI Equity has focused on investing in exceptional software and AI-driven companies from scaling stages through later growth.” Source: RevenueBase Database · checked Sep 20, 2026
3	Acon Investments, L.L.C	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	91 contacts →
	Strong evidence “ACON Investments is a private equity investment firm led by a cohesive team that has been investing together for over 25 years.” Source: RevenueBase Database · checked Sep 20, 2026
4	Dark Alpha Capital LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	n/a	90 contacts →
	Strong evidence “Dark Alpha Capital is an investment firm focused on acquiring private companies.” Source: RevenueBase Database · checked Sep 20, 2026
5	Halifax Group	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	49 contacts →
	Strong evidence “Halifax Group is a private investment firm dedicated to partnering with founders and managers of lower middle-market businesses with total enterprise values generally between $50…” Source: RevenueBase Database · checked Sep 20, 2026
6	Updata Partners	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	33 contacts →
	Indirect evidence “Updata Partners is a leading technology-focused growth equity firm in Washington D.C.” Source: RevenueBase Database · checked Sep 20, 2026
7	HCI Equity Partners	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	31 contacts →
	Indirect evidence “HCI Equity Partners is now Oridian Capital Partners.” Source: RevenueBase Database · checked Sep 20, 2026
8	Emerging Capital Partners - ECP	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	30 contacts →
	Partial evidence “Emerging Capital Partners (ECP) is one of the longest-established private equity fund managers focused on Africa.” Source: RevenueBase Database · checked Sep 20, 2026
9	Temerity Capital Partners	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	15 contacts →
	Strong evidence “Temerity Capital Partners is a private investment company managed on behalf of its founder, his family interests, and eligible employees.” Source: RevenueBase Database · checked Sep 20, 2026
10	Springharbor Financial Group LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	13 contacts →
	Strong evidence “SpringHarbor is a private investment firm based in Washington, DC founded by former Comptroller of the Currency, Eugene Ludwig.” Source: RevenueBase Database · checked Sep 20, 2026
11	United Western Group UWG	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	11 contacts →
	Partial evidence “United Western Group is a private equity firm based in Washington, D.C.” Source: RevenueBase Database · checked Sep 20, 2026
12	Multiplier Capital	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	10 contacts →
	Indirect evidence “The Multiplier partners, as a team, have invested over $1.6 billion in capital across more than 165 transactions over the past 20+ years, applying 90 years in combined experience…” Source: RevenueBase Database · checked Sep 20, 2026
13	Farragut Capital Partners	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	8 contacts →
	Strong evidence “Farragut Capital Partners is a privately-held investment management firm providing private capital (usually senior sub debt and/or preferred equity) to finance outstanding…” Source: RevenueBase Database · checked Sep 20, 2026
14	PAN African Capital Group, LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	7 contacts →
	Strong evidence “Pan African Capital Group, LLC is a private equity and investment banking firm focused exclusively on Sub-Saharan Africa.” Source: RevenueBase Database · checked Sep 20, 2026
15	Operating Partners Group INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	5 contacts →
	Partial evidence “We work with entrepreneurs, private equity companies, and corporate clients to grow value the right way.” Source: RevenueBase Database · checked Sep 20, 2026
16	TVD Capital Partners	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “Founded on a commitment to enduring long-term value creation, we actively engage with our companies post-acquisition and partner with top-tier management teams industry leaders…” Source: RevenueBase Database · checked Sep 20, 2026
17	Northwood Healthcare Partners	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	4 contacts →
	Strong evidence “Northwood Healthcare Partners is a healthcare private investment firm focused on partnering with founders and business owners to build market leading healthcare services companies.” Source: RevenueBase Database · checked Sep 20, 2026
18	Pencek Advisors	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	3 contacts →
	Partial evidence “Pencek Advisors partners with middle market private equity firms, portfolio companies, and founder-owned businesses to execute on strategic initiatives and create sustained value.” Source: RevenueBase Database · checked Sep 20, 2026
19	Capend	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Some of business' greatest ideas are threatened by a lack of planning, expectation management, or follow-through.” Source: RevenueBase Database · checked Sep 20, 2026
20	Cinnamon Advisors	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Cinnamon Advisors is an advisory firm is dedicated to engaging clients at any stage of a businesses lifecycle.” Source: RevenueBase Database · checked Sep 20, 2026
21	Serendipity Equity Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect evidence “Serendipity Equity Group (SEG) operates at the intersection of capital and execution.” Source: RevenueBase Database · checked Sep 20, 2026
22	Slipstream Investors	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect evidence “Investing in early-stage VC funds and their breakout portfolio companies” Source: RevenueBase Database · checked Sep 20, 2026
23	Impel Capital	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Strong evidence “Impel Capital is a private capital firm providing custom credit and equity investment solutions to companies with Revenue between $10m and $100m.” Source: RevenueBase Database · checked Sep 20, 2026
24	Quoth Capital	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Indirect evidence “At Quoth, we believe that true value creation transcends traditional financial metrics.” Source: RevenueBase Database · checked Sep 20, 2026
25	Green Hills Capital Partners LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	1 contacts →
	Indirect evidence “GHCP is a boutique merchant banking and advisory firm focused on Africa’s high-growth markets.” Source: RevenueBase Database · checked Sep 20, 2026

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: private investment companies. 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 private investment companies.
Partial evidence: Its own public description names part of private investment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name private investment companies. 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 46 private investment companies based in Washington, United States

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Private investment companies based in Washington, United States at a glance

As of Sep 20, 2026

54.7%Verified-email coverage

68.4Average contacts per company

1-10Median size (employees)

1650.0%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 46 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 investment companies, 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 Washington, United States whose own description of what they do matches “private investment companies”. 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 private investment companies), 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 private investment companies, and records with no verified work email. Companies headquartered outside Washington 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, 1,721 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.

Private investment companies by metro in the United States

Private investment companies in New York759
Private investment companies in Chicago222
Private investment companies in Los Angeles173
Private investment companies in Dallas164
Private investment companies in San Francisco145
Private investment companies in Houston125
Private investment companies in Boston117
Private investment companies in Miami113
Private investment companies in Austin111
Private investment companies in Atlanta89
Private investment companies in Denver63
Private investment companies in Charlotte53
Private investment companies in Washington46
Private investment companies in Tampa39
Private investment companies in San Diego38
Private investment companies in Newport Beach37
Private investment companies in Greenwich36
Private investment companies in Minneapolis35
Private investment companies in Philadelphia34
Private investment companies in Cleveland30
Private investment companies in Birmingham29
Private investment companies in Nashville28
Private investment companies in New York City27
Private investment companies in Stamford27
Private investment companies in Beverly Hills26
Private investment companies in Scottsdale26
Private investment companies in Seattle25

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 private investment companies, 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 private investment companies are there based in Washington, United States?

RevenueBase identified 46 private investment companies headquartered in Washington, 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?

The Carlyle Group, headquartered in Washington, tops this list with the largest team on record.

Which city has the most private investment companies?

New York leads with 759 headquartered companies, followed by Chicago (222) and Los Angeles (173).

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 1,721 verified decision-maker contacts tracked across these 46 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.

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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.