Company lists · Data refreshed September 2026
Top 25 Project finance law firms based in Washington, United States
RevenueBase identified 84 project finance law firms headquartered in Washington, United States as of September 2026 and tracks 13,491 professional contacts across them, including 8,240 with verified work emails. New York is the largest hub.
This list covers project finance law 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, 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 25 largest project finance law firms based in Washington, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,333 | ||||
“Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,790 | ||||
“Committed to Your Success – As a law firm of more than 900 professionals, Venable delivers legal services globally in every area of regulatory compliance, government affairs…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 576 | ||||
“Founded in 1983, Wiley is a dominant presence in the nation’s capital.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | Synergy Consulting, INCPartial evidence | 434 | |||
“Synergy Consulting is Global Leader in Financial and Corporate Advisory.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 328 | ||||
“Beveridge & Diamond’s 170+ lawyers in 7 U.S.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | Keller And Heckman LLPPartial evidence | 230 | |||
“Keller and Heckman, founded in 1962, has a broad practice in the areas of regulatory law, public policy, and litigation, serving both domestic and international clients.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | VAN Ness Feldman LLPPartial evidence | 174 | |||
“Van Ness Feldman is a nationally recognized mid-sized law firm specializing in the areas of energy, environment, and natural resources law and policy, with offices in Washington…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 74 | ||||
“Founded in Astris Finance, a Colliers company, is an independent financial advisory firm specialized in the Infrastructure and Energy (I&E) sectors with an exceptional track…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 73 | ||||
“Since 1977, Reno & Cavanaugh has been a national law firm dedicated to strengthening communities through strategic use of public and private resources.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | John & Hengerer LLPIndirect evidence | 46 | |||
“John & Hengerer LLP represents and advises energy companies, inlcuding natural gas producers, importers, processors, and marketers; gas and liquids pipeline operators; gas storage…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 36 | ||||
“Tiber Hudson LLC is a boutique law firm focused in providing legal services including complex commercial litigation, complex commercial transactions, corporate structure and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 29 | ||||
“Spiegel & McDiarmid LLP was formed to represent the public side of our nation’s critical infrastructure industries, including energy, telecommunications and transportation.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 28 | ||||
“Since its founding in 1971, DWG & P, has provided a broad range of counseling, regulatory, litigation and legislative services to clients in every region of the country.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 18 | ||||
“Amis, Patel & Brewer, LLP is a boutique law firm focused on providing legal services to the renewable energy and sustainability sectors.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | E&w LAWIndirect evidence | 18 | |||
“At Earth & Water, we are more than lawyers – we’re strategic advisors with unique experience who advance our clients’ interests across a broad range of environmental and business…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | Harkins Cunningham LLPPartial evidence | 18 | |||
“Harkins Cunningham LLP is a law firm engaged in optimizing risk and opportunities in complex matters in highly regulated and politicized environments.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | Rock Creek Energy Group, LLPIndirect evidence | 17 | |||
“Rock Creek Energy Group is a group of diverse and like-minded professionals with a shared passion – Energy.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 17 | ||||
“The attorneys of Asmar, Schor & McKenna are recognized leaders in all areas of construction law, commercial real estate transactions and commercial leasing.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | Kalbian Hagerty LLPPartial evidence | 17 | |||
“Kalbian Hagerty LLP is an international general practice law firm with offices in Washington, D.C, Abu Dhabi, U.A.E, and New York City and a strategic alliance with a prominent…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 16 | ||||
“A full-service business law firm, Veritas Law has expertise in corporate and transactional law, litigation, and licensing.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | Slover & Loftus, LLPPartial evidence | 16 | |||
“Slover & Loftus, LLP is a national law firm founded in 1967 and specializing in commercial transactions, litigation and arbitration in the fields of energy, transportation and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | Sustainable Capital AdvisorsPartial evidence | 14 | |||
“Sustainable Capital Advisors (SCA) is a strategy consulting and financial advisory firm focused on delivering innovative capital solutions for the sustainable infrastructure…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 13 | ||||
“Since it was founded in 1993, LB3 has been the leading firm guiding large customers through a maze of legal, technical, financial, and regulatory issues to close world-class…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | Greengate LLCStrong evidence | 12 | |||
“Greengate was founded in 2005 by senior financial professionals with extensive backgrounds in project and structured finance.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | Taylor-DejonghPartial evidence | 12 | |||
“Taylor-DeJongh (TDJ) is an international financial advisory firm based in Washington, D.C.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 84 project finance law firms based in Washington, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 8,240 reachable decision-makers.
Free signup · no credit card
Project finance law firms based in Washington, 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 Washington, over 84 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 project finance law 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 Washington, United States whose own description of what they do matches “project finance law 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 project finance law 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 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, 8,240 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.
Project finance law firms by metro in the United States
- Project finance law firms in New York148
- Project finance law firms in Houston98
- Project finance law firms in Washington84
- Project finance law firms in Chicago64
- Project finance law firms in Los Angeles50
- Project finance law firms in Miami49
- Project finance law firms in Dallas47
- Project finance law firms in Atlanta32
- Project finance law firms in Denver32
- Project finance law firms in Austin27
- Project finance law firms in Philadelphia26
- Project finance law firms in San Francisco26
Frequently asked
How many project finance law firms are there based in Washington, United States?
RevenueBase identified 84 project finance law 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?
Arnold & Porter, headquartered in Washington, tops this list with the largest team on record.
Which city has the most project finance law firms?
New York leads with 148 headquartered companies, followed by Houston (98) and Washington (84).
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 8,240 verified decision-maker contacts tracked across these 84 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.
Ready to reach these companies? Verified emails and direct dials for all 84 project finance law firms based in Washington, United States. Start with a free account, no credit card.
Get the full listRelated lists
Project finance law firms by geography
- Project finance law firms based in Brazil
- Project finance law firms based in the United States
- Project finance law firms based in Spain
- Project finance law firms based in France
- Project finance law firms based in Italy
- Project finance law firms based in Germany
- Project finance law firms based in Mexico
- Project finance law firms based in Poland
- Project finance law firms based in the United Kingdom
- Project finance law firms based in Australia
- Project finance law firms based in South Africa
- Project finance law firms based in the Netherlands
Browse the directory
Browse: Companies home · Project finance law firms in United States · All United States lists · All Project finance law firms lists · New lists
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Project finance law firms based in Brazil
- Project finance law firms based in the United States
- Project finance law firms based in Spain
- Project finance law firms based in France
- Project finance law firms based in Italy
- Project finance law firms based in Germany