Arthur Andersen LLP was an American accounting firm based in Chicago that provided auditing, tax advising, consulting and other professional services to large corporations. By 2001, it had become one of the world's largest multinational corporations and was one of the "Big Five" accounting firms. The firm collapsed by mid-2002, as details of its questionable accounting practices for energy company Enron and telecommunications company WorldCom were revealed amid the two high-profile bankruptcies. The scandals were a factor in the enactment of the Sarbanes–Oxley Act of 2002.
The Big Four are the four largest professional services networks in the world: Deloitte, EY, KPMG, and PwC. They are the four largest global accounting networks as measured by revenue. The four are often grouped because they are comparable in size relative to the rest of the market, both in terms of revenue and workforce; they are considered equal in their ability to provide a wide scope of professional services to their clients; and, among those looking to start a career in professional services, particularly accounting, they are considered equally attractive networks to work in, because of the frequency with which these firms engage with Fortune 500 companies.
Management consulting is the practice of providing consulting services to organizations to improve their performance or in any way to assist in achieving organizational objectives. Organizations may draw upon the services of management consultants for a number of reasons, including gaining external advice and accessing consultants' specialized expertise regarding concerns that call for additional oversight.
Accenture plc is a global multinational professional services company originating in the United States and headquartered in Dublin, Ireland, that specializes in information technology (IT) services and management consulting. A Fortune Global 500 company, it reported revenues of $64.9 billion in 2024.
Protiviti Inc. (Protiviti) is a global consulting firm headquartered in Menlo Park and San Ramon, California, that provides consulting in internal audit, risk and compliance, technology, business processes, data analytics and finance. It is a subsidiary under Robert Half. Protiviti and its independently and locally owned Member Firms serve clients through a network of more than 85 locations in over 27 countries.
Deloitte Touche Tohmatsu Limited, commonly referred to as Deloitte, is a multinational professional services network based in London, England. Deloitte is the largest professional services network by revenue and number of employees in the world and is one of the Big Four accounting firms, along with EY, KPMG, and PwC.
Morningstar, Inc. is an American financial services firm headquartered in Chicago, Illinois, founded by Joe Mansueto in 1984. It provides an array of investment research and investment management services.
Wolters Kluwer N.V. is a Dutch information services company. The company serves legal, business, tax, accounting, finance, audit, risk, compliance, and healthcare markets.
Hitachi Consulting Corporation was an American international management and technology consulting firm with headquarters in Dallas, Texas. It was founded in November 2000 as a subsidiary of the Japanese corporation Hitachi, and employed approximately 6,500 people in the US, Japan, Brazil, China, India, Portugal, Singapore, Spain, the UK, Germany, and Vietnam.
Forvis Mazars, LLP ranks among the U.S. top 10 public accounting firms, providing assurance, tax, and consulting services. In June 2024, Forvis Mazars Global network was formed between FORVIS and Mazars.
SyCip Gorres Velayo & Company is a Philippine multidisciplinary professional services firm.
Verisk Analytics, Inc. is an American multinational data analytics and risk assessment firm based in Jersey City, New Jersey, with customers in insurance, natural resources, financial services, government, and risk management sectors. The company uses proprietary data sets and industry expertise to provide predictive analytics and decision support consultations in areas including fraud prevention, actuarial science, insurance coverage, fire protection, catastrophe and weather risk, and data management.
Altegrity Risk International (ARI) was a New York City-based global risk consulting and information services company. A subsidiary of Altegrity, Inc. of Falls Church, VA, ARI provided investigations, business intelligence, forensic accounting, compliance and monitoring and security services to businesses and government agencies around the world.
Sheshunoff Consulting + Solutions (SCS) is a company that provides consulting and advisory services to the financial services industry. It was founded in 1971 as Sheshunoff Information Services, was later sold away from and then back to Sheshunoff Management Services, and then re-named Sheshunoff Consulting + Solutions. The company is headquartered in Austin, Texas. SCS focuses on management consulting, risk management, technology solutions, and investment banking.
Huron Consulting Group, commonly known as Huron, is a management consulting firm offering services to the healthcare, life sciences, commercial, and higher education industries.
Kanbay International, Inc. was an Indian-based global information technology (IT) services firm with approximately 6900 associates worldwide that later created a second Headquarters in the United States. Founded in 1989, the organization offered management consulting, technology integration, application development, and outsourcing strategies. Kanbay is now a division of Capgemini under the name Financial Services Strategic Business Unit (FS-SBU).
Moody's, previously known as Moody's Analytics, is a subsidiary of Moody's Corporation established in 2007 to focus on non-rating activities, separate from Moody's Investors Service. It provides economic research regarding risk, performance and financial modeling, as well as consulting, training and software services. Moody's is composed of divisions such as Moody's KMV, Moody's Economy.com, Moody's Wall Street Analytics, the Institute of Risk Standards and Qualifications, and Canadian Securities Institute Global Education Inc.
Multidisciplinary professional services networks are organizations formed by law, accounting and other professional services firms to offer clients new multidisciplinary approaches solving increasingly complex issues. They are a type of professional services network which operates to provide services to their members. They operate in the same way as accounting firm networks and associations and law firm networks. They do not practice a profession such as law or accounting but provide services to members so they can serve clients needs. Their aim is to provide members involved in doing business internationally with access to experienced, tried and tested, reliable, and responsive professional advisers who know their local jurisdiction intimately as well as the intricacies of cross border business.
Andersen Tax LLC is a tax firm headquartered in San Francisco, California, United States. It provides tax, valuation, financial advisory and consulting services to individuals and corporate clients. It has offices in Chicago, Baltimore, Boston, Dallas, Florham Park, Greenwich, Harrisburg, Houston, Long Island, Los Angeles, New York City, Orange County, Philadelphia, Pittsburgh, San Francisco, Seattle, Silicon Valley, Washington, D.C., West Palm Beach, Woodland Hills as well as South Africa.
Marsh is a global professional services firm, headquartered in New York City with operations in insurance broking and risk management. Marsh is a subsidiary of Marsh McLennan and a member of its Risk & Insurance Services business unit. Currently, approximately 45,400 Marsh employees provide risk management, insurance broking, insurance program management, risk consulting, analytical modeling and alternative risk financing services to a wide range of businesses, government entities, professional service organizations and individuals in more than 130 countries. Marsh's $10.208 billion in revenue in 2021 accounted for 52% of the parent company's fiscal year revenue.
US$$7.24 billion (2022)
