| Cert # | Name | Date Purged | Date Certified |
| 1 | Champion Boxed Beef | 1/1/1998 | 1/1/1991 |
| 2 | Royal Crest Dairy | | 2/1/1991 |
| 3 | Conley-Built, Inc. | 2/1/1998 | 2/1/1991 |
| 4 | Northglenn, City of | | 5/9/1991 |
| 5 | Mason Transportation, Inc. | 5/9/1994 | 5/9/1991 |
| 6 | U S Engineering Company | | 5/9/1991 |
| 7 | Encon United Company | | 5/9/1991 |
| 8 | Turner Brothers Painting & Roofing | 8/5/1998 | 8/15/1991 |
| 9 | Capco, Incorporated | 12/6/2017 | 8/15/1991 |
| 10 | Horizons Health Care & Retirement Community | 8/15/1992 | 8/15/1991 |
| 11 | Dvorak, Bill Kayak & Rafting Expeditions, Inc. | | 8/15/1991 |
| 12 | Whitney Electric | 8/15/2009 | 8/15/1991 |
| 13 | Craig Hospital | | 8/15/1991 |
| 14 | Lakewood Brick & Tile Company | | 8/15/1991 |
| 15 | Master Klean Janitorial, Inc. | | 8/15/1991 |
| 16 | Candy's Tortilla Factory, Inc. | 6/17/1997 | 9/11/1991 |
| 17 | Western Scrap Processing Co., Inc. | 9/6/2000 | 10/9/1991 |
| 18 | Front Range Job Services, Inc. | 11/13/2005 | 11/13/1991 |
| 19 | Design Mechanical, Inc. | 9/18/2000 | 11/13/1991 |
| 20 | Allen Plumbing & Heating, LLC | | 11/13/1991 |
| 21 | Denver Equipment Company | 10/27/1994 | 11/13/1991 |
| 22 | Tolin Mechanical Systems | | 12/11/1991 |
| 23 | Rich's Auto Body | 12/11/1993 | 12/11/1991 |
| 24 | Cotter Corporation | 12/5/2001 | 12/11/1991 |
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