- New York Times: World Trade Center Tenants
 - Directory of businesses that were located in north and south towers of the World Trade Centre. - Washington Post: World Trade Center Tenants
- Alphabetical lists of the businesses who had offices in World Trade Centre towers one and two, as well as contact information and links.
- AIG Aviation
- Underwriter of aviation insurance.
- Alan Anthony
- Strategic business development and marketing consulting for IT, telecommunications, and real estate markets.
- Alliance Consulting Group, Inc.
- Offices located throughout the United States.
- American Bureau of Shipping
- Establishes and administers standards for the design, construction, and operational maintenance of marine vessels and structures.
- Anandicom Trading Technologies
- Short-term stock recommendations generated by our technical trading systems.
- Aon Corporation
- Provider of risk management, retail, reinsurance, and wholesale brokerage, claims management, specialty services, and human capital consulting services.
- Aramark
- Professional services company. Aramark provides food, hospitality, and facility management services as well as uniform and work apparel.
- Asahi Bank
- Banco Latinoamericano de Exportaciones (BLADEX)
- Multinational bank created by the central banks of the Latin American and Caribbean countries. Specializes in regional foreign trade.
- Bank of America
- Provides banking and financial services to individuals, small businesses, and commercial, corporate, and institutional clients.
- Cantor Fitzgerald
- Broker-dealer specializing in fixed-income securities, institutional equities, derivatives, and foreign stocks.
- Carr Futures
- Global futures brokerage.
- China Patent & Trademark Agent (USA)
- Patent and trademark agency representing North American clients on the development, acquisition, and protection of intellectual property rights in China and Hong Kong.
- Commerzbank North America
- Wholesale banking for corporate and institutional customers as well as banks. Services includes corporate, trade, real estate, and public finance, and treasury and trading activities.
- Commodity Futures Trading Commission (CFTC)
- Corporation Service Company
- Provides registered agent and incorporation services.
- Deutsche Bank
- Provider of financial solutions for private and business clients.
- Dow Jones & Company, Inc.@
- Drinker Biddle & Reath
- General practice law firm based since 1849 in Philadelphia, Pennsylvania.
- Dun & Bradstreet Corporation@
- eMeritus Communications
- Provides a range of voice, data, and Internet communication services.
- Empire HealthChoice, Inc.
- Offering a range of HMO, PPO, and Senior plan options.
- Fiduciary Trust Company
- Management of assets and the administration of trusts for individuals and families.
- Fireman's Fund
- Providing commercial and personal property and casualty insurance to business, home, and auto owners.
- Fred Alger Management
- Offers separate account investment management services to individual and institutional clients.
- Frenkel & Co.
- International insurance brokers.
- Guy Carpenter & Company
- Advises insurance and reinsurance companies regarding risk management and provides a comprehensive array of support services.
- Harris Beach LLP
- Instinet
- Provides agency brokerage services to security industry professionals worldwide. Member of the Reuters family of companies.
- John J. McMullen Associates
- Provides services in naval architecture, marine engineering, information technologies, and transportation sciences.
- Keefe, Bruyette & Woods
- Securities broker/dealer and full service investment bank specializing in the financial services sector.
- Kemper Insurance Companies
- Consist of Lumbermens Mutual Casualty Company (LMC), American Manufacturers Mutual Insurance Company and their affiliated companies.
- Landmark Education Corporation@
- Learn about Landmark Corporation LLC, the international company which offers self-development courses designed to bring about positive shifts in one's life and career. Sites offer program details, seminars, workshops, online courses, and profiles of Landmark Education graduates and their communities.
- Mancini Duffy
- Architecture and design services.
- MetLife
- Provider of life insurance and other financial services to individual and institutional customers.
- Morgan Stanley
- Global financial services firm that serves a diversified group of corporations, governments, financial institutions, and individuals.
- NBC@
- Network Plus
- Providing business communications services including long distance and local telephone, Internet access, networking, and more.
- New York Department of Taxation and Finance
- Official site. Includes tax forms, services, FAQs on taxes, and e-filing.
- New York Shipping Association
- Organization of New York and New Jersey port employers and ocean carriers.
- New York Society of Security Analysts
- Forum for the exchange of information among investment professionals, corporate managements, and other interested members of the public.
- NYSE Group@
- Find sites about NYSE Group which operates the New York Stock Exchange and the NYSE Arca Exchange through sites including market and trading info, real-time stock quotes, searchable index of listed companies, annual reports, history, as well as publications and announcements.
- Oppenheimer Funds
- Provides a broad spectrum of funds designed to provide shareholders with the opportunities for portfolio diversification they need.
- P. Wolfe Consultants
- Building code and zoning consultants.
- Pace University
- With campuses in Pleasantville, White Plains, and New York City.
- PACRIM Trading and Shipping
- Services include international and domestic investments, import and export trading, air and ocean freight transportation, and more.
- Pass Consulting
- Working to support customers' innovation processes through business and systems analysis, feasability studies, system design, and more.
- Port Authority of New York and New Jersey
- Manages shipping, terminals, bridges, tunnels, airports, and waterfront development, promoting economic growth in the bistate region.
- Pure Energy Online
- Regional Alliance for Small Contractors
- Operates a program enabling small, minority, and women contractors to realize successful growth in construction and related industries.
- RLI Corp
- Provides niche property and casualty insurance coverage.
- Rohde & Liesenfeld
- Logistics providers for all cargo business.
- Sandler O'Neill & Partners
- Full-service investment banking firm providing advisory and transaction services to the financial industry.
- Security Traders Association
- Works to improve the ethics, business standards, and working environment for its members, who are engaged in the buying, selling, and trading of securities.
- Serko & Simon
- Headquartered in the World Trade Centre. Representation in customs, trade & transportation matters.
- Tradesoft Technologies/Euro Brokers
- Develops end-to-end delivery of electronic brokerage systems and electronic matching engine technology.
- WCBS 2
- CBS affiliate for New York City.
- WNYW 5
- Fox affiliate for New York City.
- WPIX 11@
- XCEL Federal Credit Union
- Zim Israel's Navigation Company
- A container shipping company operating an international network of shipping lines.
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