| Triangle Chemical Company GA | Wholesale Trade | 0 | — | B |
| Triangle Construction Co., Inc. SC | Construction | 0 | — | C |
| Triangle Construction Services TN | Construction | 0 | — | F |
| Triangle Contracting, LLC MD | Construction | 0 | — | F |
| Triangle Contractors, LLC NC | Construction | 0 | — | A |
| Triangle Credit Union NH | Finance & Insurance | 0 | — | A |
| Triangle Day School Inc NC | Educational Services | 1 | $55,600 | — |
| Triangle DeCon Services, Inc. CA | Professional & Technical Services | 1 | $140,000 | — |
| Triangle Distributing Co CA | — | 0 | — | — |
| Triangle Electric Company MI | Construction | 0 | — | A |
| Triangle Electric, Inc. ND | Construction | 0 | — | A |
| Triangle Electrical Services, Inc. NC | Construction | 0 | — | C |
| Triangle Engineering Corporation IN | Manufacturing | 0 | — | A |
| Triangle Engineering, LLC TX | Professional & Technical Services | 3 | $85,833 | — |
| Triangle Enterprises Inc. CA | Construction | 0 | — | A |
| Triangle Enterprises, Inc. KY | Construction | 0 | — | B |
| TRIANGLE ENVIRONMENTAL SERVICE CENTER INC. CA | Professional & Technical Services | 1 | $93,500 | — |
| Triangle Fastener Corp AL | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corp DE | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corp FL | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corp GA | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corp IN | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corp MD | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corp MS | Wholesale Trade | 0 | — | F |
| Triangle Fastener Corp NC | Wholesale Trade | 0 | — | F |
| Triangle Fastener Corp OH | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corp PA | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corp TN | Wholesale Trade | 0 | — | D |
| Triangle Fastener Corp TX | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corp VA | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corp WA | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corporation CA | Wholesale Trade | 0 | — | A |
| Triangle Fastener Corporation CO | Wholesale Trade | 0 | — | A |
| Triangle Grading & Paving, Inc. NC | Construction | 0 | — | D |
| Triangle Industrial AZ | Manufacturing | 0 | — | A |
| TRIANGLE LEASING CORP OH | Other Services | 0 | — | A |
| Triangle Machine Products OH | Manufacturing | 0 | — | A |
| Triangle Manufacturing Company WI | Manufacturing | 0 | — | A |
| Triangle Manufacturing, Inc MN | Manufacturing | 0 | — | F |
| TRIANGLE MOON LLC NY | Arts & Entertainment | 1 | $89,253 | — |
| Triangle Motors, Inc. dba Browning Dodge Chrysler Jeep Ram CA | — | 0 | — | — |
| Triangle of Panama City, Inc. FL | Construction | 0 | — | F |
| Triangle Package Machinery Company IL | Manufacturing | 0 | — | F |
| Triangle Precision Ind OH | Manufacturing | 0 | — | F |
| Triangle Properties Inc CA | Manufacturing | 0 | — | A |
| Triangle Ready Mix NC | Manufacturing | 0 | — | F |
| Triangle Roofing Services, Inc. NC | Construction | 0 | — | A |
| Triangle Roofing, Inc. PA | Construction | 0 | — | F |
| Triangle Service of South Florida Tampa International Airport FL | — | 0 | — | — |
| Triangle Services FL | Transportation & Warehousing | 0 | — | D |
