| United Unions | Building Owner | $2,719,996 |
| Mosaic | Printing Vendor | $308,866 |
| AT&T | Telecommunications | $238,835 |
| Post Master | Postal Service | $213,500 |
| Bond Beebe | Accounting Firm | $179,977 |
| Acropolis Investment Mgmt | Investment Broker | $171,523 |
| Donald Quaid & Associates | Software Developer | $79,950 |
| Segal | Consultant | $72,370 |
| Charles Stunson | IT Consultant | $69,795 |
| Optimal Networks | Network Consultant | $68,644 |
| United Parcel Service | Delivery Service | $63,583 |
| Reserve Account | Postal Service | $60,000 |
| Miller's Supplies at Work | Supplier | $50,673 |
| Ceridian | Payroll Service | $48,066 |
| Manning & Napier Advisors, Inc | Investment Manager | $47,014 |
| Hartnett Gladney, Hetterman, LLC | Law Firm | $40,952 |
| Sparks Personnel Services Inc | Employment Service | $39,848 |
| UBT | Copier Leasing | $31,704 |
| Cantwell-Cleary Co,Inc | Office Supply Vendor | $31,081 |
| DC of Western Canada | Labor Organization | $29,910 |
| Robert Half International, Inc. | Employment Service | $29,537 |
| GreatAmerica Financial Services | Copier Leasing | $29,302 |
| Complete Software Solutions, LLC | Consultant | $25,686 |
| Morgan Stanley Smith Barney | Invest. Consultant | $25,000 |
| IABSORIW-DOAAM | Satellite Office | $24,949 |
| Suntrust | Bank | $24,391 |
| Columbia Partners, L.L.C. | Investment Manager | $22,820 |
| CME Enterprises, Inc. | Supplies | $22,025 |
| Canon Solutions America, Inc, | Equipment Vendor | $21,166 |
| DC Of St Louis & Vicinity | Labor Organization | $20,558 |
| Verizon | Telecommunications | $18,356 |
| DC of Ontario | Labor Organization | $16,816 |
| DataBank IMX LLC | Digital Imaging Vendor | $15,424 |
| ABF Freight Systems, Inc. | Shipping Vendor | $14,835 |
| Gibson & Barnes | Law Firm | $12,519 |
| DC Of New York State | Labor Organization | $11,967 |
| Skillsoft Corporation | Training Software | $10,046 |
| Purchase Power | Postage Vendor | $10,000 |
| IABSORIW-Canada | Satellite Office | $9,717 |
| Deer Park | Water Vendor | $9,063 |
| DC Of Tennessee Valley | Labor Organization | $8,952 |
| DC Of Pacific Northwest | Labor Organization | $8,745 |
| AFL-CIO | Labor Organization | $8,500 |
| DC Of No Central States | Labor Organization | $8,314 |
| Metal Trades, AFL-CIO | Labor Organization | $8,130 |
| DC of Southern Ohio & Vicinity | Labor Organization | $7,914 |
| Mid Atlantic Construction Supply | Glass Vendor | $7,716 |
| DC of N. Ohio, W PA & N West VA | Labor Organization | $7,684 |
| Siff & Associates | Law Firm | $7,500 |
| Metro Computer Supplies | Computer Supplies | $7,251 |
| DC Of Eastern Canada | Labor Organization | $7,065 |
| Accountemps | Employment Service | $6,858 |
| Pitney Bowes Inc | Equipment Vendor | $6,766 |
| DC of Mid-Atlantic States | Labor Organization | $6,666 |
| DC Of California & Vicinity | Labor Organization | $6,643 |
| Concrete Reinforcing Steel Institute | Steel Tech Institute | $6,475 |
| DC of Southeastern States | Labor Organization | $6,405 |
| DC Of Rocky Mountain Area | Labor Organization | $5,844 |
| Amazon.com | Online Retailer | $5,791 |
| Costco Wholesale | Supply Vendor | $5,432 |
| Fast Express Courier Services | Delivery Service | $5,327 |
| USPS | Postal Service | $5,315 |
| Consumer Energy Alliance | Energy Group | $5,000 |
| DC Texas & Mid-South States | Labor Organization | $5,000 |
| DC Of Philadelphia & Vicinity | Labor Organization | $5,000 |
| DC Of New England States | Labor Organization | $5,000 |
| DC Of Chicago & Vicinity | Labor Organization | $5,000 |
