Insights

High-net-worth clientele GSO serves world-class entertainers, musicians, producers, athletes, and high net worth individuals, presenting a strong opportunity to upsell comprehensive financial management, tax optimization, and wealth advisory services tailored to affluent clients.

Full-service offering With in-house bookkeeping, accounting, CPA services, royalty, and insurance departments, GSO is positioned to cross-sell integrated financial solutions to existing clients and expand into related advisory services such as risk management and estate planning.

Strategic partnerships Longstanding alliances with mortgage brokers, banks, and financial institutions suggest potential for referrals and collaborative service packages, enabling cross-sell of lending, financing, and wealth products.

Regional dominance Operating from Sherman Oaks as one of the largest business management firms in the San Fernando Valley, there is an opportunity to expand services to neighboring markets or franchise-like partnerships leveraging brand credibility and local presence.

Growth readiness Revenue range of 25 to 50 million and a staff exceeding 60–65 professionals indicate scale advantages for enterprise-level service proposals, tech-enabled workflow enhancements, and scalable solutions such as outsourced finance and accounting, payroll, and strategic planning for high-growth clients.

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GSO Business Management, LLC Tech Stack

GSO Business Management, LLC uses 8 technology products and services including WordPress, WooCommerce, Google Fonts API, and more. Explore GSO Business Management, LLC's tech stack below.

  • Content Management System
  • E-commerce
  • Google Fonts API
    Font Scripts
  • Backbone.js
    Javascript Frameworks
  • jQuery
    Javascript Libraries
  • Yoast SEO
    Search Engines
  • ZURB Foundation
    UI Frameworks
  • Twitter
    Widgets

GSO Business Management, LLC's Email Address Formats

GSO Business Management, LLC uses at least 3 email formats:
GSO Business Management, LLC Email FormatsExamplePercentage
FLast@gsogroup.comJDoe@gsogroup.com
80%
F.Last@gsogroup.comJ.Doe@gsogroup.com
11%
First@gsogroup.comJohn@gsogroup.com
9%

Frequently Asked Questions

What is GSO Business Management, LLC's phone number?

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You can contact GSO Business Management, LLC's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is GSO Business Management, LLC's official website and social media links?

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GSO Business Management, LLC's official website is gsogroup.com and has social profiles on LinkedIn.

How much revenue does GSO Business Management, LLC generate?

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As of July 2026, GSO Business Management, LLC's annual revenue is estimated to be $25M - $50M.

What is GSO Business Management, LLC's SIC code and NAICS code?

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GSO Business Management, LLC's SIC code is 7389 - Business Services, Not Elsewhere Classified and NAICS code is 5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services.

How many employees does GSO Business Management, LLC have currently?

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As of July 2026, GSO Business Management, LLC has approximately 51 employees across 2 continents, including North America and Asia. Key team members include President: S. L., Director, Royalties: S. A. and Accountant: S. C. Explore GSO Business Management, LLC's employee directory with LeadIQ.

What industry does GSO Business Management, LLC belong to?

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GSO Business Management, LLC operates in the Accounting industry.

What technology does GSO Business Management, LLC use?

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GSO Business Management, LLC's tech stack includes WordPress, WooCommerce, Google Fonts API, Backbone.js, jQuery, Yoast SEO, ZURB Foundation and Twitter.

What is GSO Business Management, LLC's email format?

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GSO Business Management, LLC's email format typically follows the pattern of FLast@gsogroup.com. Find more GSO Business Management, LLC email formats with LeadIQ.

When was GSO Business Management, LLC founded?

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GSO Business Management, LLC was founded in 1977.
GSO Business Management, LLC logo

GSO Business Management, LLC

AccountingCalifornia, United States51-200 Employees

GSO Business Management offers comprehensive financial management for individuals and professionals, combining bookkeeping, accounting, and CPA services with in-house royalty and insurance support to address a broad range of financial needs. Its client roster includes entertainers, musicians, producers, athletes, and other high-net-worth individuals. The firm is based in Sherman Oaks, California, positioned near the center of the Ventura Boulevard business corridor in the Los Angeles area, and operates with a sizable professional staff.
The firm traces its origins to Bernard Gudvi, who launched Bernard Gudvi & Co. in 1977; after a merger and the establishment of a Sherman Oaks office in 1989, it evolved into its current form. Today, the practice is led by partners Michael Oppenheim and Nicholas Brown and emphasizes coordinating a client’s entire financial world, supported by alliances with mortgage brokers, banks, and financial institutions to broaden service reach. In the San Fernando Valley, the firm is regarded as one of the larger business management practices serving high-profile clients.

Section iconCompany Overview

Phone number
SIC Code
7389 - Business Services, Not Elsewhere Classified
NAICS Code
5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services
Founded
1977
Employees
51-200

Section iconFunding & Financials

  • $25M - $50M

    GSO Business Management, LLC's revenue is estimated to be in the range of $25M - $50M

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