Arthur Andersen 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.
Ernst & Young Global Limited, trade name EY, is a multinational professional services partnership. EY is one of the largest professional services networks in the world. Along with Deloitte, KPMG and PwC, it is considered one of the Big Four accounting firms. It primarily provides assurance, tax, information technology services, consulting, and advisory services to its clients.
KPMG International Limited is a multinational professional services network, and one of the Big Four accounting organizations, along with Ernst & Young (EY), Deloitte, and PwC. The name "KPMG" stands for "Klynveld Peat Marwick Goerdeler". The initialism was chosen when KMG merged with Peat Marwick in 1987.
PricewaterhouseCoopers International Limited is a multinational professional services brand of firms, operating as partnerships under the PwC brand. It is the second-largest professional services network in the world and is considered one of the Big Four accounting firms, along with Deloitte, EY and KPMG.
BearingPoint is an independent multinational management and technology consulting firm with 47 offices across 24 countries and around 5,300 employees. In 2022, the firm delivered 1,603 projects in more than 40 countries.
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 an Irish-American professional services company based in Dublin, specializing in information technology (IT) services and consulting. A Fortune Global 500 company, it reported revenues of $64.1 billion in 2023. Accenture's current clients include 91 of the Fortune Global 100 and more than three-quarters of the Fortune Global 500. As of 2022, Accenture is considered the largest consulting firm in the world by number of employees.
Deloitte Touche Tohmatsu Limited, commonly referred to as Deloitte, is a multinational professional services network. Deloitte is the largest professional services network by revenue and number of professionals in the world and is considered one of the Big Four accounting firms along with EY, KPMG and PwC.
A consulting firm or simply consultancy is a professional service firm that provides expertise and specialised labour for a fee, through the use of consultants. Consulting firms may have one employee or thousands; they may consult in a broad range of domains, for example, management, engineering, and so on.
Genpact is a professional services firm legally domiciled in Bermuda with its headquarters in New York City, New York. The company currently employs more than 100,000 people and provides services to clients in over 30 countries worldwide. Genpact is listed on the NYSE and generated revenues of US$3.71 billion in 2021.
Oliver Wyman is an American management consulting firm. Founded in New York City in 1984 by former Booz Allen Hamilton partners Alex Oliver and Bill Wyman, the firm has more than 60 offices in Europe, North America, the Middle East, and Asia-Pacific employing over 5,000 professionals. The firm is part of the Oliver Wyman Group, a business unit of Marsh McLennan.
EPAM Systems, Inc. is an American company that specializes in software engineering services, digital platform engineering, and digital product design, operating out of Newtown, Pennsylvania. EPAM is a founding member of the MACH Alliance.
Mercer is an American consulting firm founded in 1945. It is one of the four operating subsidiaries of global professional services firm Marsh McLennan. Mercer is headquartered in New York City with offices in 43 countries and operations in 130 countries. The company primarily provides human resources and financial services consulting services to its clients.
Corporate services or business services are activities which combine or consolidate certain enterprise-wide needed support services, provided based on specialized knowledge, best practices, and technology to serve internal customers and business partners. The term corporate services providers (CSPs) is also used.
Bain & Company is an American management consulting company headquartered in Boston, Massachusetts. The firm provides advice to public, private, and non-profit organizations. One of the Big Three management consultancies, Bain & Company was founded in 1973 by former Group Vice President of Boston Consulting Group Bill Bain and his colleagues, including Patrick F. Graham. In the late 1970s and early 1980s, the firm grew rapidly. Bill Bain later spun off the alternative investment business into Bain Capital in 1984 and appointed Mitt Romney as its first CEO. Bain experienced several setbacks and financial troubles from 1987 to the early 1990s. Romney and Orit Gadiesh are credited with returning the firm to profitability and growth in their sequential roles as the firm's CEO and chairman respectively.
An accounting network or accounting association is a professional services network whose principal purpose is to provide members resources to assist the clients around the world and hence reduce the uncertainty by bringing together a greater number of resources to work on a problem. The networks and associations operate independently of the independent members. The largest accounting networks are known as the Big Four.
West Monroe is a digital services firm headquartered in Chicago, Illinois. West Monroe provides traditional management consulting, creative and product engineering services to businesses across many industries, including consumer and industrial products, energy and utilities, financial services, healthcare, life sciences, private equity, retail, and software and high tech. West Monroe is consistently recognized as a best place to work and a top consulting firm. West Monroe’s tagline is "Don’t Do Digital. Be Digital."
Ryan LLC is a tax services and software provider based in Dallas, Texas. Ryan LLC has 18,000 clients in over 60 countries. The company has over 113 locations around the globe, including locations in Canada, the Netherlands, the United Kingdom, India, the Philippines, and Australia.
Robert Half International Inc., commonly known as Robert Half, is an international human resource consulting firm founded in 1948, based in Menlo Park and San Ramon, California. It is a member of the S&P 500, and is among the world's largest accounting and finance staffing firms, with over 345 locations worldwide.
USD 1.98 billion (2022)
