Companies with offices in One World Trade Center:
| Floor | Company | Business |
|---|---|---|
| Concourse | Ann Taylor Loft | Retail |
| Concourse | NY Coffee Station | Food retail |
| Concourse | Strawberry | Retail |
| Lobby | Avis | Car rental |
| Lobby | Delta Airlines | Airline |
| Lobby | Olympia Airport Express | Transportation |
| 3 | Port Authority of New York and New Jersey | Government |
| 5 | Gayer, Shyu and Wiesel | Accountants |
| 7 | Thai Farmers Bank | Banks/Financial |
| 8 | Amerson Group | Organizations |
| 9-10 | Bank of America | Banks/Financial |
| 11 | Porcella Vicini and Company | Unknown |
| 11 | Primarch Decision Economics | Consultants |
| 11 | Bank of America | Banks/Financial |
| 13 | Instinet | Investment |
| 14 | Dun and Bradstreet | Research |
| 14 | Port Authority of New York and New Jersey | Government |
| 14 | Instinet | Investment |
| 15 | Landmark Education Corporation | Government/Schools |
| 16 | ZimAmerican Israeli Shipping Company | Unknown |
| 16 | California Bank and Trust | Banks/Financial |
| 17 | Empire Health Choice | Insurance |
| 17 | ZimAmerican Israeli Shipping Company | Unknown |
| 19 | Port Authority of New York and New Jersey | Government |
| 19-20 | Empire Health Choice | Insurance |
| 21 | Avesta Computer Services | Data processing |
| 21 | Continental Logistics | Business services |
| 21 | Dongwon Securities | Investment |
| 21 | Dr. Tadasu Tokumaru, M.D | Doctors |
| 21 | Friends Ivory and Sime | Investment |
| 21 | Friends Villas Fischer Trust | Investment |
| 21 | Infotech | Unknown |
| 21 | Law Offices of Roman V. Popik | Attorneys |
| 21 | Lief International | Manufacturing |
| 21 | Tower Computer Service | Retailers |
| 21 | United Seamen's Service AMMLA | Social services |
| 22 | Cheng Xiang Trading | Computer services |
| 22 | Chicago Options Exchange Corporation | Investment |
| 22 | G.C. Services | Collection agency |
| 22 | Gold Sky | Manufacturing |
| 22 | Kaiser Overseas | Manufacturing |
| 22 | Karoon Capital Management | Investment |
| 22 | MLU Investment | Investment |
| 22 | P. Wolfe Consultants | Consultants |
| 22 | Tai Fook Securities | Investment |
| 22 | The SCPIE Companies | Unknown |
| 22 | Unicom Capital Advisors | Investment |
| 23-24 | Empire Health Choice | Insurance |
| 24 | Port Authority of New York and New Jersey | Government |
| 25 | GarbanIntercapital | Investment |
| 25 | R.H. Wrightson and Associates | Investment |
| 26 | GarbanIntercapital | Investment |
| 28 | Port Authority of New York and New Jersey | Government |
| 29 | China Patent and Trademark | Attorneys |
| 29 | World Travel | Travel |
| 31 | Port Authority of NY and New Jersey | Government |
| 32 | Banco LatinoAmericano de Export | Banks/Financial |
| 32 | Chang HWA Commercial Bank | Banks/Financial |
| 32 | Rohde and Liesenfeld | Unknown |
| 33 | Berel and Mullen | Attorneys |
| 33 | China Daily Distribution Corporation | Business services |
| 33 | Data Transmission Network Corporation | Unknown |
| 33 | Hu Tong International Company | Wholesalers |
| 33 | Koudis International | Unknown |
| 33 | MANAA Trading Group | Investment |
| 33 | MIS Service Company | Unknown |
| 33 | Rachel and Associates | Manufacturing |
| 33 | Serko and Simon | Attorneys |
| 33 | Golden King | Unknown |
| 35 | Law Offices of Anne Pope | Attorneys |
| 35-36 | Kemper Insurance Companies | Insurance |
| 37 | Commodity Futures Trading Comm | Investment |
| 37 | Government of Thailand | Government |
| 38 | Lehman Brothers | Investment |
| 38 | Regional Alliance Small Contractors | Construction |
| 38 | Turner Construction Company | Construction |
| 39 | Cultural Institutions Retirement Sys | Trusts |
| 39 | Overseas Union Bank | Banks/Financial |
| 39 | Xcel Federal Credit Union | Banks/Financial |
| 39 | Tai Fook Securities | Investment |
| 39-40 | Lehman Brothers | Investment |
| 41-43 | Mechanical Floor | |
| 44 | N.Y. Society of Security Analysts | Government/Schools |
| 45 | American Lota International | Unknown |
| 45 | China Construction America | Construction |
| 45 | Dunavant Commodity Corporation | Investment |
| 45 | Employee Merit | Employment agency |
| 45 | Fertitta Enterprises | Unknown |
| 45 | M.A. Katz, CPA | Accountants |
| 45 | Pure Energy Corporation | Wholesalers |
| 45 | Sassoons | Unknown |
| 45 | Security Traders Association | Organizations |
| 45 | SRA | Unknown |
| 45 | Streamline Capital | Unknown |
| 45 | The Company Store | Retailers |
| 46 | ASTDC | Organizations |
| 46 | Auto Imperial Company | Wholesalers |
| 46 | Blue Sky Technologies | Computer services |
| 46 | CanAchieve | Consultants |
| 46 | Consolidated Steelex Corporation | Manufacturing |
| 46 | Dahao USA Corporation | Wholesalers |
| 46 | J and X Tans International | Unknown |
| 46 | Kanebo Information Sys. Corporation | Computer services |
| 46 | Meganet Management Consultants | Computer services |
| 46 | Prospect International | Unknown |
| 46 | Sinopec USA | Wholesalers |
| 46 | Suggested Open Systems | Computer services |
| 46 | Suntendy America | Wholesalers |
| 46 | TandT Enterprises International | Miscellaneous |
| 46 | Yong Ren America | Unknown |
| 47 | American TCC International Group | Investment |
| 47 | G. Z. Stephens | Employment agency |
| 47 | NFA/GGG | Unknown |
| 47 | Pacific American Company | Wholesalers |
| 47 | Quint Amasis | Business services |
| 47 | W.J. ExportImport | Wholesalers |
| 48-50 | DaiIchi Kangyo Trust Company | Trusts |
| 51 | ATandT Corporation | Telecommunication |
| 51 | C and P Press | Business services |
| 52 | Bramax Manufacturing Corporation | Wholesalers |
| 52 | Gayer Shyu and Wiesel | Investment |
| 52 | Hill Betts and Nash | Attorneys |
| 52 | Howly (US) Corporation | Unknown |
| 52 | Leeds and Morrelli | Attorneys |
| 52 | Okasan International (American) | Investment |
| 52 | RGL Gallagher PC | Accountants |
| 52 | Richard A. Zimmerman | Attorneys |
| 52 | Temenos USA | Wholesalers |
| 52 | The Williams Capital Group | Unknown |
| 53 | A I G Aviation Brokerage | Insurance |
| 53 | Bank of Taiwan | Banks/Financial |
| 53 | China Resource Products USA | Unknown |
| 53 | Keenan Powers and Andrews | Attorneys |
| 53 | LoCurto and Funk | Investment |
| 53 | Natural Nydegger Transport Corporation | Unknown |
| 53 | Pacrim Trading and Shipping | Unknown |
| 53 | Pure Energy Corporation | Wholesalers |
| 54 | Brown and Wood | Attorneys |
| 55 | Pace University | Government/Schools |
| 55 | World Trade Institute | Unknown |
| 56-59 | Brown and Wood | Attorneys |
| 60 | Asahi Bank | Banks/Financial |
| 63 | Airport Access Program | Banks/Financial |
| 77 | Hal Roth Agency | Insurance |
| 77 | Jun He Law Office | Attorneys |
| 77 | Martin Progressive | Computer services |
| 77 | Newey International Corporation | Business services |
| 77 | World Trade Centers Associates | Organizations |
| 78 | Avenir | Computer services |
| 78 | Baltic Oil Corporation | Corporate |
| 78 | Cedar Capital Mgt Associates | Banks/Financial |
| 78 | Cheng Cheng Enter. Holding Inc | Retailers |
| 78 | Geiger and Geiger | Attorneys |
| 78 | Hyundai Securities Company | Investment |
| 78 | International Trade Center | Public relations |
| 78 | Korea Local Auth. Foundation for International | Government/Schools |
| 78 | Meridian Ventures Holding | Financial |
| 78 | Pacrim Trading and Shipping | Unknown |
| 78 | Phink Path | Employment agency |
| 78 | Traders Access Center | Investment |
| 79 | Daynard and Van Thunen Company | Insurance |
| 79 | First Liberty Investment Group | Investment |
| 79 | International Office Centers Corporation | Business services |
| 79 | Nikko Securities | Banks/Financial |
| 79 | Okato Shoji Company | Computer services |
| 79 | Securant Technologies | Computer services |
| 80 | Agricor Commodities Corp | Investment |
| 80 | Intrust Investment Realty | Real estate |
| 80 | Noga Commodities Overseas | Investment |
| 80 | Shizuoka Bank Ltd | Banks/Financial |
| 80 | The Beast.Comm | Computer services |
| 80 | RLI Insurance Company | Insurance |
| 81 | Bank of America | Banks/Financial |
| 81 | Network Plus | Telecommunication |
| 81 | New Continental Enterprises | Unknown |
| 82 | NY Metro Transportation Council | Government/Schools |
| 83 | eMeritus Communications | Telecommunication |
| 83 | General Telecommunications | Telecommunication |
| 83 | Global Crossings Holdings Ltd | Computer services |
| 83 | Lava Trading | Unknown |
| 83 | Taipei Bank | Banks/Financial |
| 84 | Bright China Capital | Investment |
| 84 | David Peterson | Attorneys |
| 84 | KITC | Investment |
| 84 | LG Securities America | Investment |
| 84 | SanIn Godo Bank Ltd | Banks/Financial |
| 84 | Temenos USA | Wholesalers |
| 84 | Unicom Capital Advisors | Investment |
| 85 | SMW Trading Corporation | Investment |
| 85 | Thermo Electron | Unknown |
| 86 | Julien J. Studley | Real estate |
| 87 | May Davis Group | Investment |
| 89 | Barcley Dwyer | Unknown |
| 89 | Broad USA | Wholesalers |
| 89 | CIIC Group (USA) | Investment |
| 89 | Daehan International | Investment |
| 89 | Drinker Biddle and Reath | Attorneys |
| 89 | Metropolitan Life Insurance Company | Insurance |
| 89 | Mutual International Forwarding | Unknown |
| 89 | Strategic Communications | Telecommunication |
| 89 | Wai Gao Qiao USA | Consultants |
| 89 | Wall Street Planning Associates | Unknown |
| 90 | American TCC International Group | Investment |
| 90 | The Chugoku Bank | Banks/Financial |
| 91 | American Bureau of Shipping | Engineers |
| 93 | Fred Alger Management | Investment |
| 93-100 | Marsh USA | Insurance |
| 101-105 | Cantor Fitzgerald Securities | Investment |
| 101 | Kidder Peabody and Company | Banks/Financial |
| 102 | The NishiNippon | Banks/Financial |
| 104 | Channel 4 (WNBC) | Television |
| 106 | Windows on the World | Retailers |
| 107 | Greatest Bar on Earth | Bar |
| 107 | World Trade Club | Unknown |
| 110 | Channel 11 (WPIX) | Television |
| 110 | Channel 2 (WCBS) | Television |
| 110 | Channel 7 (WABC) | Television |
| 110 | Channel 31 (WPXN) | Television |
| 110 | Channel 47 (WNJU) | Television |
| 110 | Channel 5 (WNYW) | Television |
| 110 | CNN | Television |
| NA | Alan Anthony | Consultants |
| NA | Cedel Bank | Investment |
| NA | LG Insurance Company | Insurance |
| NA | Northern Trust International Banking Corporation | Banks/Financial |
| NA | Royal Thai Embassy Office | Government |
| NA | Tes USA | Investment |
| NA | United Hercules | Travel |