Our History

On July 9, 2002, in the wake of Arthur Andersen's demise, Andersen announced that HSBC purchased a portion of Andersen's tax practice through a new subsidiary, Wealth & Tax Advisory Services, Inc. (WTAS). The new private client services group, led by Mark Vorsatz and joined by Joe Toce and 21 other former Andersen partners, would strive to redefine the professional services industry. WTAS is formed.

WTAS pursues a low leverage business model putting clients at the center. Managing Directors— “Partners” as they regard each other—would “roll up their sleeves” and work directly with their clients. The Partner’s devotion of time and attention to each client would lead to creative and unique solutions, which would ultimately result in the best client service possible.

The firm successfully transitions 92% of its clients to the newly-formed business, adds seven new Managing Directors and increases its client base by 20% in the first year. The firm also grows its practitioner headcount by over 10% in a recessionary business climate.

WTAS acquires the rights to Tax Economics of Charitable Giving publication, recognized as the most authoritative treatment of its kind, and begins plans to publish a new updated version. The authors of this book, Joseph P. Toce, Jr., Byrle M. Abbin, William M. Pace, and Mark L. Vorsatz, are Managing Directors of WTAS.

WTAS continues to establish a benchmark for quality against which all other firms will be measured.

In its second year of business, WTAS implements a client newsletter, establishes a mechanism for internal technical releases, and publishes the firm’s first edition of Tax Economics of Charitable Giving.

The firm adds six more Managing Directors (MDs) and now has 38 MDs firmwide. WTAS continues to add new clients, growing nearly 27%. This growth is not necessarily an objective, but rather a byproduct of the outstanding client service delivered by the best and brightest professionals in the industry.

WTAS adds 16 Managing Directors as growth accelerates. Revenues are up almost 27% this year and the client base has doubled since inception. The firm expands its services to better serve clients. New service lines now include valuation, investment consulting services, state and local tax, corporate taxation, real estate services, personal accounting solutions and international tax capabilities.

WTAS opens offices in the Philadelphia and Baltimore markets. The firm will continue to systematically build out its platform.

WTAS expands to Chicago, Silicon Valley, and Seattle. The firm now has 11 locations. This growth is the result of a very simple concept upon which the firm was founded: providing best-in-class service. The firm’s revenue growth reaches 46% for the year. WTAS is now the 11th largest tax practice in the nation, according to Accounting Today.

This year marks WTAS’ fifth anniversary. People have joined WTAS from a variety of firms, including all of the Big Four, and have melded and formed a culture that takes the very best from each of its reference points. The firm shares a common vision for what it wants to be and what it wants to achieve. In less than five years, the firm tripled the size of its client base. It’s time for a change.

On December 31, 2007, in a mutual decision, HSBC signs an agreement to sell Wealth & Tax Advisory Services (WTAS) to participating WTAS Managing Directors in a management buy-out. 

WTAS relocates to new offices in San Francisco, Seattle, and Greenwich, CT and opens an office in New Jersey. Although the bottom falls out of the economy in the latter half of the year, WTAS adds 15 new Managing Directors (MDs) and its total MD complement is now 74. The new MDs expand WTAS’ service capabilities in the areas of state and local taxation, valuation, cost segregation, private equity, corporations and tax controversy. As a direct result of the firm’s dedication to “clients first,” revenue is growing when most other

Continuing to build on its past success in spite of the difficult economy, WTAS is successful in making the transition from a firm primarily focused on private client services to one that is a full-service tax advisory firm and offers competencies in corporate taxation, state and local tax, international tax services, alternative investment funds, valuation, compensation and benefits, and many related subspecialties.

Over the last eight years, WTAS grew its client base fourfold. The firm’s Managing Director complement has grown to 86 with the addition of 13 more. By quantitative measures, the firm has consistently grown by three to four times in every category over an eight year period.

WTAS has succeeded at putting clients at the center of the firm’s operating model and continues to expand capabilities to meet client’s needs. The firm has evolved from serving primarily the personal needs of high net worth private clients to a point where about 55% of revenues come from private clients, while 45% come from commercial entities.

In the three years since the Managing Directors of WTAS left HSBC, the firm accomplished a tremendous amount despite the worst economic environment since the Depression Era. WTAS’ aim of providing the best client service possible has shown its value more than ever. The success of the firm is linked to the success of its clients.

Preparing for the success of its clients, WTAS expands its offices in New York City, Los Angeles and Philadelphia.

July 9, 2012 marks 10 years as a firm. WTAS believes that service, experience and a genuine concern for our clients are prerequisites for developing long-lasting relationships.

By almost any measure, WTAS has quadrupled in size in the 10 short years the firm has been in existence. WTAS is now one of the largest independent tax advisory firms in the United States, with over 500 people in 14 offices. In the markets we serve, we have the scale and experience of a multi-national accounting firm with the visibility and attentiveness of a local boutique firm.

CEO Mark Vorsatz announces new initiatives to hire military service veterans and involve WTAS personnel even more in volunteer service in their communities. Our Chicago office prepares to move to a new site with twice the space as its present location.

This firm was founded with a dream to be different and to change an industry standard.

2013 is full of new milestones for WTAS including the addition of offices in Dallas and Houston, and the establishment of WTAS Global.

WTAS is now located in 16 major cities in the United States and has an international presence in Europe through WTAS Global.

WTAS continues to grow and expand internationally with the establishment of various offices throughout Europe, announcing new offices in Switzerland, Italy, Germany, Poland, Netherlands and Luxembourg.  

A name from the past, a firm for the future: On September 2, WTAS announced it had acquired the rights to the iconic brand name Andersen and would rename itself Andersen Tax. Like WTAS, Andersen Tax is an independent global tax firm with no audit practice that could impair the credibility or integrity of the services it provides. It is completely owned by its partners, most who previously worked at Arthur Andersen or a Big 4 accounting firm. Read the letter from our CEO.

Andersen Global now has a presence in more than 30 international locations with over 300 professionals in Europe and over 1000 professionals worldwide.

Andersen experienced steady growth in 2014 and is looking forward to continued growth in 2015 through our international association, which is now named Andersen Global.

Andersen opens a new location in Orange County, CA and expands the US National Tax Office through the addition of several new partners.

In June, Andersen Global announces its expansion into Latin America with the addition of a member firms in Mexico and Guatemala, the first member firms outside the U.S. to adopt the Andersen name.

Andersen Global now has 45 international locations with over 1,200 professionals worldwide.

Andersen announces collaboration agreements with new firms in Canada and Ireland and ends the year with a presence more than 50 locations worldwide.

Andersen’s growth accelerates.  The firm begins its expansion into Africa adding a presence in Nigeria, Kenya, Uganda, and Egypt.  The firm continues to build its platform in Latin America, Europe, and the Middle East, establishing a presence in Greece, Cyprus, Portugal, Uruguay, Ecuador, and Lebanon.

Over the course of the year, the Andersen name debuts in Canada, Germany, Ireland, Israel, Italy, Luxembourg, Netherlands, Nigeria, Poland, Spain, and Switzerland as member firms in those countries adopt the Andersen brand.

On July 9th, Andersen celebrates its 15 Year Anniversary. 15 years after Arthur Andersen and four years after initiating our global expansion, it is clear that our vision of becoming the firm known for the quality of its services is becoming a reality.

Andersen has added more than 30 offices across five continents.  Andersen Global now has a presence in over 80 locations worldwide.

In 2018, the Andersen name debuts in more locations around the globe including Ecuador, Egypt, Ireland and Kenya as member firms in those countries adopt the Andersen brand.

Andersen’s growth is gaining momentum.

In Africa, Andersen adds a presence in Angola, Ethiopia, Ivory Coast and Mozambique.

In Europe, Andersen expands into the United Kingdom and Hungary.

Andersen’s expansion in Latin America continues with the announcement of new presence in Argentina, Brazil, Paraguay and Peru.

In the Middle East, Andersen enters into Collaboration Agreements with firms in Kuwait, Jordan, and Saudi Arabia.

Andersen announces it presence in India, adding both tax and legal capabilities.

In North America, Andersen opens a new office in Washington, D.C. and establishes a presence in Western Canada.

Andersen Global now has a presence in over 125 locations worldwide.

Andersen experiences explosive growth in Europe adding a presence in Austria, Bosnia and Herzegovina, Croatia, North Macedonia, Romania, Serbia, Slovakia, and Slovenia.

In Africa, Andersen’s presence expands to include locations in Botswana, Cameroon, Mauritius, Namibia, Niger, Rwanda, Senegal, South Africa, Zambia, and Zimbabwe

Andersen’s presence in Latin America grows with additions in Colombia and Costa Rica.

In the Middle East and Central Asia, Andersen adds a presence in Bahrain, Kazakhstan, Oman, and Qatar.

On September 3, Andersen Tax announces it will now operate under the brand “Andersen.” The Andersen name reflects the full scope of services available to clients in the U.S. and internationally, and best reflects the firm’s history, values, and vision for the future. Our growth continues to be a byproduct of best-in-class service and quality solutions.

The Andersen name also debuts in Kuwait, Jordan and the United Kingdom as member firms adopt the Andersen brand in those countries.

Andersen Global now has more than 5,000 professionals worldwide and a presence in over 160 locations through its member firms and collaborating firms.

Andersen announces that the member firms of Andersen Global in Europe and Latin America will now operate under a single brand, “Andersen,” demonstrating the unified and seamless approach of the global organization—a one-stop shop for tax and legal services globally.

Andersen initiates expansion in the Caribbean, adding a presence in Aguilla, Barbados, Grenada, Haiti, Jamaica, St. Kitts & Nevis, St. Lucia, Trinidad and Tobago, and the U.S. Virgin Islands.

In Africa, Andersen expands its presence to include more than 20 countries with new locations in Algeria, Benin, Burkina Faso, Burundi, Chad, Djibouti, Eritrea, Eswatini, Gambia, Guyana, Liberia, Mali, Mauritania, Madagascar, South Sudan, Sudan, and Togo.

Andersen’s footprint continues to grow in other regions as well including Asia Pacific (Australia), Europe (Armenia, Malta, Republic of Moldova, Ukraine), Latin America (Chile, Suriname, Venezuela), Central Asia (Azerbaijan, Tajikistan), and the Middle East (Palestine).

Andersen Global now has a presence in over 225 locations worldwide through its member firms and collaborating firms.

Andersen adds more than 100 locations over the course of this year.

Andersen strengthens it Caribbean platform, adding a presence in Antigua and Barbuda, Aruba, The Bahamas, Belize, Bermuda, Bonaire, the Cayman Islands, St. Barts, St. Maarten, St. Vincent and the Grenadines, and Turks and Caicos.

Andersen Global enters the Southeast Asian market adding locations in Cambodia, Indonesia, Laos, Malaysia, Myanmar, Philippines, and Vietnam, and expands its presence in Asia to include Hong Kong and China.

In Africa, Andersen Global unifies its African member firms under the Andersen brand, including three former collaborating firms. Rapid expansion continues in the region as Andersen establishes a new presence in Congo, Guinea-Bissau, Gabon, Lesotho, Libya, and Malawi.

Andersen also broadens it footprint in Europe (Czech Republic, Liechtenstein, Monaco, Norway, Sweden), Central Asia (Kyrgyzstan, Turkey, Uzbekistan), Latin America (Bolivia, Dominican Republic), and the Middle East (Pakistan, United Arab Emirates, Yemen).

Andersen Global now has a presence in over 160 countries with more than 325 locations worldwide.

The Andersen platform globally continues to solidify as member firms Slovenia, Georgia, UAE, Bahrain, Palestine adopt the Andersen brand.

Andersen enhances is tax and legal platform in Europe adding a presence in Belgium, Denmark, Estonia, France, Finland, Iceland, Latvia and Lithuania.

Andersen’s deepens it footprint in Africa—adding locations in the Central African Republic, Ghana and Tanzania—and extends it presence in other regions with new locations in Bangladesh, Sri Lanka, Montserrat, New Zealand, South Korea, Taiwan and Thailand.

Andersen Global has developed a strong tax and legal platform encompassing a presence in over 390 locations worldwide.  Andersen is ready to enhance the platform to support its commitment to seamless client service globally and enters into collaboration agreements with its first valuation and global mobility firms in the United Kingdom and France, respectively.

Andersen Global welcomes 10 member firms to its platform, increasing its ability to provide independent, multidisciplinary, borderless service to its global clients.

In addition to adding tax and legal capabilities in Nepal, Andersen announces new global mobility capabilities in Switzerland and Brazil and adds valuation capabilities in Romania.

In the U.S., Andersen expands its presence in Orange County, California and establishes new offices in Des Moines, Iowa and Pittsburgh, Pennsylvania.

Andersen Global now has a presence in over 400 locations worldwide.

Andersen’s global tax and legal capabilities solidify as member firms in Armenia, Belgium, Colombia, Malta, Rwanda, Serbia, and Trinidad and Tobago formally adopt the Andersen brand, and Andersen Global establishes a presence in both Japan and Mongolia.

Andersen adds a new office in San Diego, expanding its footprint in Southern California.

Andersen announces it has expanded its valuation capabilities across Latin America through additions in Argentina, Chile, Colombia, and Mexico.

Andersen also expands the reach of its global valuation practice to more than 16 countries throughout Europe. It has added 14 new valuation groups in Europe in the last 12 months alone.

Andersen Global adds valuation capabilities in Africa and strengthens its overall regional coverage through the addition of collaborating firms in Nigeria and South Africa.

The expansion of Andersen’s global valuation practice continues throughout the year, adding new valuation capabilities and locations in Bulgaria, Canada, Czech Republic, Dominican Republic, and Turkey.  Andersen also adds M&A capabilities in New Zealand, the Philippines and South Africa, as well as real estate consulting capabilities in Australia.

Andersen closes the year with the announcement that it has advanced its global valuation practice in the Asia Pacific adding valuation  capabilities in Australia, China, Indonesia, Malaysia, Philippines, Singapore, South Korea, Taiwan, Thailand and Vietnam.

Andersen now has valuation capabilities in more than 50 countries worldwide and a presence in a total of more than 500 locations worldwide.

On January 16, Andersen Global strengthens its presence in Asia Pacific through a Collaboration Agreement with leading commercial law firm Howards Lawyers in Fiji.

On January 23, Andersen Global expands its presence in Argentina through a Collaboration Agreement with Confis, a tax firm based in Córdoba serving clients throughout the country and region.

On February 6, Andersen Global bolsters its platform in Europe through a Collaboration Agreement with Allyum, a leading Mergers & Acquisitions (M&A) firm in Belgium.

On February 11, Andersen Global builds its legal platform Latin America presence through Collaboration Agreements with MBP Partners and Schmukler IP, two law firms based in Buenos Aires.

On February 13, Andersen Global enhances legal capabilities in Denmark through a Collaboration Agreement with Hansen TaxLegal, a high net worth and international tax law firm based in Copenhagen.

On February 19, Andersen Consulting launches on six continents with a presence in 66 countries. Andersen Consulting offers a seamless, multidimensional approach that combines expertise in business transformation, artificial intelligence, cybersecurity, sustainability, and digital strategy with Andersen Global’s established tax, legal, valuation, and global mobility capabilities.

On February 27, Andersen Global extends its African footprint with collaborating firm ADS Valuation Services PLC, enhancing its valuation capabilities and solidifying its platform in Ethiopia.

On March 5, Andersen Global enhances its multidisciplinary capabilities in the Middle East through a Collaboration Agreement with Al-Sharif Law Firm, a full-service international law firm based in Riyadh, Saudi Arabia.

On March 10, Andersen Global solidifies its Asia Pacific platform as Bellingham Wallace, a collaborating firm since 2022, becomes a member firm and launches the Andersen brand in New Zealand.

On March 11, Andersen Global strengthens its presence in East Africa through a Collaboration Agreement with Finaltus, a valuation firm based in Nairobi, enhancing the organization’s ability to deliver comprehensive valuation solutions throughout the region.

On March 18, Andersen Global expands into Bangladesh through a Collaboration Agreement with valuation and research firm Edge Research, further solidifying its presence in South Asia.

On March 26, Andersen Global expands its presence in the Middle East through a Collaboration Agreement with Ideal Capital, a M&A and valuation firm based in Dubai.

On March 27, Andersen Global strengthens its Canadian platform through a Collaboration Agreement with MMCA & Associates LLP, a full-service accounting firm.

On April 28, Andersen Global strengthens its valuation capabilities through a Collaboration Agreement with Value & Risk Valuation Services, a prominent European valuation firm headquartered in Germany with offices in Luxembourg and Austria.

On April 30, Andersen Consulting expands its consulting capabilities in Brazil as Albieri e Associados becomes a member of Andersen Consulting.

On May 1, Andersen Global enhances its footprint in the Asia Pacific through a Collaboration Agreement with Du-Baladad and Associates, a tax and corporate services firm based in the Philippines.

On May 6, Andersen Consulting adds coverage in Thailand and Indonesia with its newest member, Sertis, a leading consultancy delivering data-driven, enterprise AI solutions to clients through Southeast Asia and beyond.

On May 14, Andersen Global expands its Canadian platform through a Collaboration Agreement with Stratos Solutions Inc., a leading tax firm based in Ontario, Canada.

On May 20, Andersen Global enhances its presence in Central Asia with the addition of Andersen in Uzbekistan, marking a continued expansion of the organization’s capabilities across the region.

On May 22, Andersen Consulting expands its technology and transformation capabilities through a Collaboration Agreement with 2i Solutions.

On May 27, Andersen Consulting bolsters its sustainability offering through a Collaboration Agreement with NEC Consultants (Pvt) Ltd.

On May 28, Andersen Consulting expands its platform through a Collaboration Agreement with Stratence Partners, a United Kingdom-based consulting firm assisting global companies to improve market share and drive profitability.

On June 3, Andersen Consulting enters into a Collaboration Agreement with Bretteville Consulting, a management consultancy known for its deep expertise in strategic transformation and operational excellence.

On June 10, Andersen Consulting enhances its digital transformation capabilities with the addition of collaborating firm DEX Ventures, a digital marketing agency specializing in growth strategy and digital innovation.

On June 12, Andersen Consulting enters into a Collaboration Agreement with Sidat Hyder Morshed Associates (Sidat Hyder), a management consulting and technology services firm.

On June 17, Andersen Consulting bolsters its capabilities in business transformation, technology, and artificial intelligence through a Collaboration Agreement with Azurian Consulting.

On June 25, Andersen Consulting adds depth to its platform with the addition of collaborating firm The Clearing, a management consultancy specializing in organizational transformation and leadership development.

On June 26, Andersen Consulting expands its global platform through a Collaboration Agreement with Market One, a consulting firm based in Argentina that specializes in end-to-end commercial solutions.

On July 1, Andersen Consulting expands its capabilities in delivering technology-driven solutions with the addition of collaborating firm Mercurial Minds (M.M.), a digital transformation, AI, and IT consulting firm based in Pakistan.

On July 8, Andersen Consulting advances its consulting capabilities with collaborating firm IT Security Consulting & Training, an information security advisory firm headquartered in Jordan.

On July 9, Andersen Consulting enhances its consulting capabilities through a collaboration with 10Guards, a service-oriented company based in Ukraine that specializes in providing a wide range of professional services without offering any products (software or hardware).

On July 10, Andersen Consulting broadens its cybersecurity offering through a collaboration with GMS, a cybersecurity integrator headquartered in Ecuador with presence in Colombia and Peru.

On July 14, Andersen Consulting strengthens its platform through a collaboration with Baufest, a company focused on digital transformation and custom solutions.

On July 16, Andersen Consulting expands its capabilities with the addition of collaborating firm Hoffman Talent Partners (HTP Group), an executive search and consulting firm headquartered in Brussels, Belgium.

On July 16, Andersen opens an office in Atlanta, GA to expand its footprint in the Southeast United States.

On July 17, Andersen Consulting strengthens its capabilities in Latin America with the addition of collaboratin firm Prime Action Consulting.

On July 22, Andersen Consulting enters into a Collaboration Agreement with BD Emerson, a a leading consulting firm specializing in cybersecurity, compliance, privacy, and technology.

On July 23, Andersen Consulting continues to build its digital consulting platform through a collaboration with Exponential Digital Solutions (10xDS), a firm specializing in AI-driven transformation and emerging technologies.

On July 30, Andersen Consulting enters into a Collaboration Agreement with NextGen Invent, an AI enablement and technology services company focused on delivering innovative, data-centric solutions.

On July 31, Andersen Consulting adds to its human capital capabilities through a Collaboration Agreement with Omni HR Consulting, a South African consulting firm specializing in business and people development solutions.

On August 1, Andersen Global debuts the firm name in Botswana as AccPro Accountants becomes the latest member firm to join the organization.

On August 5, Andersen Consulting enhances its digital transformation and cybersecurity capabilities with the addition of collaborating firm Systematix, a leading technology consultancy known for delivering innovative digital enablement solutions.

On August 6, Andersen Consulting reinforces its strategy and technology transformation capabilities with the addition of collaborating firm 460degrees.

On August 7, Andersen Consulting announces a Collaboration Agreement with Virtual, Inc., a U.S.-based firm recognized for its deep expertise in strategy and operations.

On August 11, Andersen Consulting expands its strategy and transformation capabilities with the addition of new member Endeavor Management, a management consultancy with a six-decade legacy of helping complex organizations align, transform, and grow.

On August 12, Andersen Consulting announces a Collaboration Agreement with Future Processing, a technology and software consultancy, strengthening the organization’s ability to deliver end-to-end digital solutions.

On August 13, Andersen Consulting expands its technology transformation capabilities through a Collaboration Agreement with Alamo Consultores. 

On August 14, Andersen Consulting strengthens its capabilities through a Collaboration Agreement with Nisos, a U.S.-based human risk management firm that delivers intelligence-led solutions to identify and mitigate emerging threats targeting people, operations, and organizational integrity.

On August 19, Andersen Consulting further strengthens its digital transformation capabilities with Liberty IT, a leading provider of enterprise-grade digital transformation in financial services.  

On August 20, Andersen Consulting announces a Collaboration Agreement with Ventures, a leading advisory and business intelligence firm based in the Middle East, enhancing its capabilities in market analysis, economic advisory, and industry forecasting across key sectors.

On August 21, Andersen Consulting adds depth to its strategy capabilities with collaborating firm Ignis, a leading media agency, reinforcing the organization’s commitment to delivering seamless solutions to clients globally. 

On August 26, Andersen Global adds transaction advisory capabilities in Central Asia through a Collaboration Agreement with Bridge Factor, headquartered in Pakistan. 

On August 27, Andersen Consulting expands its strategy and business transformation capabilities through a Collaboration Agreement with Skribble, a digital and brand consultancy supporting innovation and operational transformation for companies in Southeast Asia. 

On August 28, Andersen Consulting expands its platform through a Collaboration Agreement with Fabric, a strategic design firm working with organizations to integrate sustainability, supply chain, and human-centered innovation across culture and operations. 

On September 3, Andersen Consulting adds depth to its digital transformation and AI capabilities through a Collaboration Agreement with FirstQA Systems, a leading technology services provider known for its expertise in business AI, digital transformation, and cybersecurity. 

On September 4, Andersen Consulting strengthens its digital transformation platform through a collaboration with Canada-based MJB Technology Solutions, a firm specializing in ServiceNow, artificial intelligence, analytics, and IT transformation.

On September 9, Andersen Consulting enhances its human capital offerings through a Collaboration Agreement with HAGER Executive Consulting, a firm specializing in board services, executive search, and leadership development. 

On September 10, Andersen Consulting broadens its capabilities in Cambodia, Vietnam, and Laos as VDB Loi brings consulting capabilities to its existing tax and legal offering. 

On September 16, Andersen Consulting enters into a Collaboration Agreement with Move, a leader in IT infrastructure, managed services, and enterprise digital solutions with a presence in Norway and Sweden. 

Andersen Global now has a presence in over 600 locations worldwide.