Company lists · Data refreshed September 2026

Top 25 Professional services firms based in Los Angeles, United States

RevenueBase identified 289 professional services firms headquartered in Los Angeles, United States as of September 2026 and tracks 4,476 professional contacts across them, including 2,293 with verified work emails. New York is the largest hub.

This list covers professional services firms headquartered in Los Angeles, 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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
289Companies
4,476Contacts tracked
2,293Verified emails
Unlock all 289 companies Free signup · no credit card · 500 free credits

The 25 largest professional services firms based in Los Angeles, United States

Ranked by team size
Top 25 of 289 professional services firms based in Los Angeles, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names professional services firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1Los Angeles, CA, United StatesHQ checked Sep 5, 2026501-1,0001,085

“Forget everything you thought you knew about professional services firms.”

Source: company website · checked Sep 5, 2026
2
HCVTIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 2026501-1,000877

“HCVT is Southern California’s leading public accounting firm, the largest headquartered in Los Angeles, and the third-largest in the Western U.S.”

Source: company website · checked Sep 5, 2026
3
Singerlewak LLPIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 2026201-500487

“SingerLewak has a 60-year history of serving clients as one of the leading West Coast based public accounting firms; SingerLewak understands the needs of business owners and…”

Source: company website · checked Sep 5, 2026
4
GHJIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 2026201-500449

“At GHJ, we go beyond numbers.”

Source: company website · checked Sep 5, 2026
5
Gursey Schneider LLPIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 2026201-500261

“Gursey | Schneider LLP is a premier Los Angeles accounting firm headquartered in Century City, the center of the financial and entertainment community.”

Source: company website · checked Sep 5, 2026
6
RBZIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 202651-20077

“At RBZ, we've thought long and hard about our people, our clients, our community, and how best to serve them and help them reach their goals going forward.”

Source: company website · checked Sep 5, 2026
7Los Angeles, CA, United StatesHQ checked Sep 5, 202651-20052

“Mann Gelon Smith Sroka Lee LLP is a leading tax and business management boutique located in Los Angeles, California.”

Source: company website · checked Sep 5, 2026
8
Fineman West & CompanyIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5041

“Fineman West & Company provides a full spectrum of accounting, tax, and business advisory services to a variety of different industries.”

Source: company website · checked Sep 5, 2026
9
BG LAWIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 202651-20032

“BG Law dealmakers and litigators leverage their business backgrounds into practical legal advice and counsel for clients.”

Source: company website · checked Sep 5, 2026
10Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5028

“Gettleson, Witzer & O’Connor is a full scope business management practice providing comprehensive tax, accounting and advisory services to individuals – members of the…”

Source: company website · checked Sep 5, 2026
11
Golbar And AssociatesIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5028

“Golbar and Associates is a full service public accounting and consulting firm specializing in providing a unique and effective approach to rendering tax, accounting and consulting…”

Source: company website · checked Sep 5, 2026
12Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5026

“SKMC, LLP (SKMC) is a premiere, Los Angeles-based accounting firm providing high net worth clients with personalized and expert audit, accounting, tax and business advisory…”

Source: company website · checked Sep 5, 2026
13Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5023

“Level Four Business Management, LLC is a full service business management firm.”

Source: company website · checked Sep 5, 2026
14Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5022

“At De Castro, West, Chodorow, Mendler, Glickfeld & Nass, Inc, we provide planning and advocacy to our clients in complex business transactions and litigation.”

Source: company website · checked Sep 5, 2026
15
Singh And AssociatesStrong evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 20261-1018

“The professionals at Singh and Associates have more than 70 years of combined experience providing tax, accounting, and business consulting services on behalf of: Contractors…”

Source: company website · checked Sep 5, 2026
16
Weinberg And Company, P.AIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5016

“Founded over 25 years ago, Weinberg is an international full-service CPA firm serving clients in the U.S, Canada and the Pacific Rim.”

Source: company website · checked Sep 5, 2026
17
TAX Hack Accounting GroupIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5016

“Tax Hack Accounting Group is a strategy-first tax, accounting, and advisory firm focused on providing innovative solutions for entrepreneurs, eCommerce businesses, start-ups, and…”

Source: company website · checked Sep 5, 2026
18
IconacIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5015

“We are more than just partners; we are your biggest fans.”

Source: company website · checked Sep 5, 2026
19
Manela & COIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5014

“Services: Accounting Services Accounting Software Selection & Implementation Bookkeeping/Write-Up Business Owners Business Services Business Valuations Buying & Selling a Business…”

Source: company website · checked Sep 5, 2026
20
LWA LLPIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5013

“LWA has grown steadily to its present position through organic growth and acquisition of accounting practices.”

Source: company website · checked Sep 5, 2026
21Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5012

“The mission of our firm has been to provide outstanding service and meaningful guidance in the areas of income tax planning, tax return preparation, accounting and business…”

Source: company website · checked Sep 5, 2026
22Los Angeles, CA, United StatesHQ checked Sep 5, 202651-20012

“Since its founding in 1975, Tanner Mainstain Glynn & Johnson has built a reputation as one of Los Angeles' largest and most respected business management firms.”

Source: company website · checked Sep 5, 2026
23
Cohen, Bender & Golden LLPIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5011

“Cohen, Bender & Golden, LLP ("CBG") is a full-service accounting firm serving clients throughout Southern California and beyond.”

Source: company website · checked Sep 5, 2026
24
Pocketbook StrategiesIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 5, 20261-1010

“Finance, Operations, and Compliance consulting firm for progressive non-profits, political organizations, businesses and co-ops, specializing in multi-entity and hybrid…”

Source: company website · checked Sep 5, 2026
25Los Angeles, CA, United StatesHQ checked Sep 5, 202611-5010

“Consider us to be your financial success squad-a dedicated team of accountants, bookkeepers, tax professionals, and financial analysts working together to help you achieve your…”

Source: company website · checked Sep 5, 2026

Showing 25 of 289 professional services firms based in Los Angeles, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,293 reachable decision-makers.

Free signup · no credit card

See all 289 companies

Professional services firms based in Los Angeles, United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
New YorkLargest hub · 593 HQs
Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
197
11-50
73
51-200
10
201-500
6
501-1,000
2

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 Los Angeles, over 289 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 professional services 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 Los Angeles, United States whose own description of what they do matches “professional services 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 professional services firms, and records with no verified work email. Companies headquartered outside Los Angeles 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, 2,293 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.

Professional services firms by metro in the United States

Frequently asked

How many professional services firms are there based in Los Angeles, United States?

RevenueBase identified 289 professional services firms headquartered in Los Angeles, 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?

Manatt, Phelps & Phillips, LLP, headquartered in Los Angeles, tops this list with the largest team on record.

Which city has the most professional services firms?

New York leads with 593 headquartered companies, followed by Houston (420) and Atlanta (304).

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 2,293 verified decision-maker contacts tracked across these 289 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 289 professional services firms based in Los Angeles, United States. Start with a free account, no credit card.

Get the full list

Related 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.