| Teledyne Signal Processing Devices Sweden AB | |
| Telefonaktiebolaget LM Ericsson | Stockholm |
| Telenor Sverige AB | Stockholm |
| Telephoneix AB | |
| TeleProffs Sverige AB | Jönköping |
| Telia | Norrbotten |
| Telia Carrier | Stockholm |
| Telia Company AB | Stockholm |
| Teligent Telecom | Stockholm |
| Telium Network | |
| Telness AB | |
| Telness Tech | |
| Telness Technologies | |
| Tempus Information Systems AB | |
| Tendium AB | |
| Tendmill AB | |
| Teneo.ai | |
| Tengai AB | |
| Tension Cam Systems AB | |
| TenWeb AB | |
| TePe Munhygienprodukter AB | |
| Teracom | Stockholm |
| Terranet AB | |
| Terratech AB | |
| Tessel Systems AB | Stockholm |
| Test Automation FX | Skåne |
| Texelio AB | |
| Texelio AB | |
| Textual Relations AB | Västra Götaland |
| TFS HealthScience | |
| The App Factory | |
| The Fit | |
| The Generation AB | |
| The Ground | |
| The Incredible Journey | |
| The Local Europe AB | |
| The Mindfulness App | |
| Thermo-Calc Software AB | Stockholm |
| Thingsquare | Stockholm |
| Thinktrain AB | |
| Thunderful Games | |
| Tic-Tac Mobile | Stockholm |
| Tickital | |
| Tickoff | |
| TicTac Learn | |
| Tidaholms Sparbank (publ) | |
| Tigerq AB | |
| TikoMed AB | |
| Tilgin | Stockholm |
| Tillväxt Malmö | |