Company lists · Data refreshed September 2026

Top 25 Portfolio company consulting firms based in Washington, United States

Name: Portfolio company consulting firms based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 92 companies tracked

RevenueBase identified 92 portfolio company consulting firms headquartered in Washington, United States as of September 2026 and tracks 1,038 professional contacts across them, including 242 with verified work emails. Across the United States, New York is the largest hub for this category (801 companies); Washington has 92.

This list covers portfolio company consulting firms 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 29, 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 29, 2026 86% judged on-target in blind review

92Companies

1,038Contacts tracked

242Verified emails

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The 25 largest portfolio company consulting firms based in Washington, United States

Ranked by team size

Top 25 of 92 portfolio company consulting firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to portfolio company consulting firms: 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	Kaiser Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	397 contacts →
	Indirect evidence “Kaiser Associates was founded in 1981 with a simple yet powerful mission: to help executives make more informed strategic and operational decisions by incorporating external…” Source: RevenueBase Database · checked Sep 29, 2026
2	The Cohen Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	110 contacts →
	Indirect evidence “Who We Are A talented team of experts with years of experience in both government and industry, with a passion for finding solutions and a deep understanding of the institutions…” Source: RevenueBase Database · checked Sep 29, 2026
3	Dark Alpha Capital LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	n/a	90 contacts →
	Indirect evidence “Dark Alpha Capital is an investment firm focused on acquiring private companies.” Source: RevenueBase Database · checked Sep 29, 2026
4	Cortado Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	33 contacts →
	Indirect evidence “We deliver rapid, measurable top-line improvements for smaller, investor-backed growth companies across multiple industries At the Cortado Group, our go-to-market experts help…” Source: RevenueBase Database · checked Sep 29, 2026
5	HCI Equity Partners	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	31 contacts →
	Indirect evidence “HCI Equity Partners is now Oridian Capital Partners.” Source: RevenueBase Database · checked Sep 29, 2026
6	5ft View Consulting, LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	27 contacts →
	Indirect evidence “You need senior leadership you can trust.” Source: RevenueBase Database · checked Sep 29, 2026
7	Ankura Joint Venture And Partnership Practice	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	24 contacts →
	Indirect evidence “Ankura is the world’s leading advisor on joint ventures and partnerships.” Source: RevenueBase Database · checked Sep 29, 2026
8	IBS Management & Consultancy Services	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	21 contacts →
	Partial evidence “IBS is an Accounting, Finance, Management, and Transaction Advisory consulting firm.” Source: RevenueBase Database · checked Sep 29, 2026
9	DHS Ventures & Holdings	Indirect evidence	Washington, United StatesHQ checked Sep 29, 2026	201-500	17 contacts →
	Indirect evidence “We purposefully engage only in friendly transactions and work with talented management teams to achieve transformative results.” Source: RevenueBase Database · checked Sep 29, 2026
10	Taylor Advisory LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	12 contacts →
	Indirect evidence “Taylor is a strategic M&A advisory firm with the mission to generate wealth and fulfillment for our clients, associates, and shareholders by building trusted relationships…” Source: RevenueBase Database · checked Sep 29, 2026
11	United Western Group UWG	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	11 contacts →
	Indirect evidence “United Western Group is a private equity firm based in Washington, D.C.” Source: RevenueBase Database · checked Sep 29, 2026
12	Blitzer, Clancy & Company	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	9 contacts →
	Partial evidence “Blitzer, Clancy & Company is a global leader in M&A advisory, growth consulting, and strategic advisory services.” Source: RevenueBase Database · checked Sep 29, 2026
13	Dunia Frontier Consultants	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	8 contacts →
	Partial evidence “With main offices in Washington DC, Dubai, and Kampala, Dunia Frontier Consultants (DFC) provides consulting services, market research and business intelligence to investors and…” Source: RevenueBase Database · checked Sep 29, 2026
14	Growthlab	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	7 contacts →
	Indirect evidence “We are matchmakers, growth advisors, business planners, intelligence suppliers, team builders, opportunity shapers, pipeline developers, and transition strategists–experts who…” Source: RevenueBase Database · checked Sep 29, 2026
15	Jasper Advisors	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	7 contacts →
	Indirect evidence “Founded by Julie Andreeff Jensen and David Sutphen, Jasper Advisors is a boutique consultancy that advises CEOs, Fortune 500 companies, and emerging businesses; non-profit leaders…” Source: RevenueBase Database · checked Sep 29, 2026
16	Outvox	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	6 contacts →
	Indirect evidence “OutVox is a boutique management consultancy.” Source: RevenueBase Database · checked Sep 29, 2026
17	OAG M&a Transaction Services O'connell Advisory Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	6 contacts →
	Indirect evidence “OAG is a team of CPA M&A advisors who provide Financial Due Diligence and Transaction Advisory Services for Entrepreneurs and Investors.” Source: RevenueBase Database · checked Sep 29, 2026
18	Jewett And Company	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	5 contacts →
	Indirect evidence “Your business is our business.” Source: RevenueBase Database · checked Sep 29, 2026
19	Operating Partners Group INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	5 contacts →
	Indirect evidence “We work with entrepreneurs, private equity companies, and corporate clients to grow value the right way.” Source: RevenueBase Database · checked Sep 29, 2026
20	Izar Capital Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	5 contacts →
	Indirect evidence “We create, structure and execute custom-made corporate finance (M&A, Joint Venture/Partnership, Financing) and operational solutions that enhance and optimize business…” Source: RevenueBase Database · checked Sep 29, 2026
21	TVD Capital Partners	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
22	LN Holdings INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	4 contacts →
	Indirect evidence “LN Holdings Inc.(LNH) is a boutique M&A and business advisory firm focused on the government contracting marketplace.” Source: RevenueBase Database · checked Sep 29, 2026
23	Cortland Advisors, LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	3 contacts →
	Indirect evidence “Cortland Advisors is a mergers and acquisitions advisory firm providing experienced expertise by industry professionals that have successfully created, grown, acquired and exited…” Source: RevenueBase Database · checked Sep 29, 2026
24	Pencek Advisors	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
25	Claroti	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	3 contacts →
	Indirect evidence “We turn overlooked products into new revenue-fast, smart, and without reinventing a thing.” Source: RevenueBase Database · checked Sep 29, 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: portfolio company consulting 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 portfolio company consulting firms.
Partial evidence: Its own public description names part of portfolio company consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name portfolio company consulting 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 92 portfolio company consulting firms based in Washington, United States

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Portfolio company consulting firms based in Washington, United States at a glance

As of Sep 29, 2026

23.3%Verified-email coverage

11.3Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 92 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 portfolio company consulting 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 Washington, United States whose own description of what they do matches “portfolio company consulting 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 portfolio company consulting 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 portfolio company consulting firms, 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, 242 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 29, 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.

Portfolio company consulting firms by metro in the United States

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 portfolio company consulting 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 portfolio company consulting firms are there based in Washington, United States?

RevenueBase identified 92 portfolio company consulting firms 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?

Kaiser Associates, headquartered in Washington, tops this list with the largest team on record.

Which city in the United States has the most portfolio company consulting firms?

New York leads the United States with 801 headquartered companies, followed by Chicago (313) and Los Angeles (242). Washington has 92.

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 242 verified decision-maker contacts tracked across these 92 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 29, 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.