| T.Troland Værktøjsmaskiner | 4000 | Roskilde |
| TAON Hydraulik | 6000 | kolding |
| Tebis Scandinavia AB | 422 46 | Hisings Backa |
| TECHCOLLEGE | 9220 | Aalborg Øst |
| techNaero aps | 4690 | Haslev |
| Technicon A/S | 9500 | Hobro |
| Technoflex ApS | 8653 | Them |
| Technor ApS | 9500 | Hobro |
| Techpartners ApS | 9530 | Støvring |
| Tecsys A/S | 2600 | Glostrup |
| Teknidan A/S | 6200 | Aabenraa |
| Teknologisk Institut - Materialer | 8000 | Aarhus |
| Teknos A/S | 6580 | Vamdrup |
| Textilia Group A/S | 2765 | Sørum |
| Th. Udengaards Metalstøberi A/S - UG Metal | 8722 | Hedensted |
| Thanex A/S | 4600 | Køge |
| ThermoNova | 9240 | Nibe |
| Thybotech ApS | 8653 | Them |
| Tibnor A/S | 5230 | Odense M |
| Tic-elkas A/S | 2740 | Skovlunde |
| Tick Cad ApS | 8700 | Horsens |
| Timesavers Nordic ApS | 7130 | Juelsmnde |
| Toftlund Maskinfabrik A/S | 6520 | Toftlund |
| Topp Trykluft A/S | 3550 | Slangerup |
| ToppTOPO A/S | 3550 | Slangerup |
| TORA A/S | 6000 | Kolding |
| TornboSvejs | 6715 | Esbjerg N |
| TotalEnergies Marketing Denmark A/S | 2100 | København Ø |
| Toyota Material Handling Danmark A/S | 3550 | Slangerup |
| Tradium | 8900 | Randers C |
| TRANSLYFT A/S | 9352 | Dybvad |
| TRANSMOTOR ApS | 7620 | Lemvig |
| TRECO A/S | 9620 | Aalestrup |
| Trelleborg Sealing Solutions Denmark A/S | 2100 | København Ø |
| TriboTec Danmark | 9800 | Hjørring |
| Trier Industries A/S | 8800 | Viborg |
| TRIMIT A/S | 8800 | Viborg |
| Trio Stål Odense A/S | 5220 | Odense SØ |
| Trio Trykluft ApS | 3550 | Slangerup |
| Triplecut A/S | 7100 | Vejle |
| Troax AB | 335 04 | Ishøj |
| Trykluft Centret A/S | 5550 | Langeskov |
| TÜV NORD Scandinavia AB | 6000 | Kolding |
| Tyrolit A/S | 2600 | Glostrup |