| 88904873 | TRANSFORMING INFRASTRUCTURE | Flatiron Construction Corp. | 6351828 |
| 88904867 | FLATIRON | Flatiron Construction Corp. | 6205298 |
| 88904864 | Serial No. 88904864 | Flatiron Construction Corp. | 6205296 |
| 77396634 | FLATIRON | Flatiron Construction Corp | 3495865 |
| 77247117 | Serial No. 77247117 | Flatiron Construction Corp. | 3500867 |
| 85759453 | FLATIRON WEST, INC. | Flatiron Construction Corp | 4461026 |
| 85759447 | FLATIRON ELECTRIC GROUP, INC. | Flatiron Construction Corp. | 4461025 |
| 85759443 | FLATIRON HOLDING, INC. | Flatiron Construction Corp | 4461024 |
| 77413300 | BUILD THE BEST, BE THE BEST | Flatiron Construction Corp | 3577726 |
| 76559133 | FLATIRON CONSTRUCTORS, INC. | FLATIRON CONSTRUCTION CORP. | 3184209 |
| 77556285 | FLATIRON WESTERN | Flatiron Construction Corp. | — |
| 77513182 | FLATIRON WEST, INC. | Flatiron Construction Corp. | — |
| 76559135 | FLATIRON CONSTRUCTION CORP. | FLATIRON CONSTRUCTION CORP. | 3199183 |
| 85096196 | FLATIRON ELECTRIC GROUP, INC. | Flatiron Construction Corp. | — |
| 85083820 | FLATIRON CONSTRUCTION INTERNATIONAL | Flatiron Construction Corp | — |
| 85073110 | FLATIRON INTERNATIONAL | Flatiron Construction Corp | — |
| 78751229 | FLATIRON CONSTRUCTION INTERMOUNTAIN | Flatiron Construction Corp. | — |
| 77350848 | FLATIRON HOLDING, INC. | Flatiron Construction Corp. | — |
| 76654404 | FLATIRON CONSTRUCTORS INTERMOUNTAIN | Flatiron Construction Corp. | — |