| Tampereen TN-Kone Oy | Wholesale & retail | 1992 |
| Tampereen TTVI-Kiinteistöt Oy | Real estate | 2012 |
| Tampereen Taikuri Group Oy | Wholesale & retail | 2007 |
| Tampereen Taitopojat Oy | Other services | 2009 |
| Tampereen Talo-Nestor Oy | Real estate | 1997 |
| Tampereen Talotekniikka Oy | Professional & scientific | 1998 |
| Tampereen Talousohjaus Oy | Professional & scientific | 1990 |
| Tampereen Tammelan puistokadun Pysäköinti Oy | Real estate | 2021 |
| Tampereen Tamset Oy | Manufacturing | 1979 |
| Tampereen Tanssikoulu Oy | Arts & recreation | 1985 |
| Tampereen Tapahtumapalvelut Oy | Administrative & support | 1990 |
| Tampereen Tase Oy | Financial services | 2016 |
| Tampereen Tasorakennus Oy | Construction | 2008 |
| Tampereen Teatteri Oy | Arts & recreation | 1938 |
| Tampereen Teatterin lavastuspalvelu Oy | Arts & recreation | 2023 |
| Tampereen Tehokone Oy | Wholesale & retail | 1991 |
| Tampereen Tehoneule Ky | Manufacturing | 1985 |
| Tampereen Tehopesu Oy | Other services | 2020 |
| Tampereen Telepalvelu Oy | Construction | 2007 |
| Tampereen Tenniskeskus Oy | Arts & recreation | 1977 |
| Tampereen Teollisuusasennus Oy | Manufacturing | 1985 |
| Tampereen Teollisuusoppilaitos Oy | Education | 1991 |
| Tampereen Teollisuusosa Oy | Manufacturing | 2006 |
| Tampereen Terassitarvike Oy | Wholesale & retail | 2009 |
| Tampereen Terveyspalvelut Oy | Health & social care | 1993 |
| Tampereen Terveystaito Oy | Health & social care | 2007 |
| Tampereen Terveysterapia Oy | Other services | 1997 |
| Tampereen Terä- ja kone-edustus Oy | Wholesale & retail | 1995 |
| Tampereen Tiivisteteollisuus Oy | Manufacturing | 1988 |
| Tampereen Tikkutehtaan Parkki Oy | Real estate | 2018 |
| Tampereen Tilahallinta Oy | Real estate | 1998 |
| Tampereen Tilapalvelut Oy | Administrative & support | 2017 |
| Tampereen Tilasisustaja Oy | Professional & scientific | 2022 |
| Tampereen Tilipiste Ky | Professional & scientific | 2002 |
| Tampereen Tohtorit Oy | Health & social care | 2006 |
| Tampereen Toimistolaite Oy | Wholesale & retail | 1998 |
| Tampereen Toteemi Oy | Administrative & support | 2016 |
| Tampereen Tulkkikeskus Oy | Professional & scientific | 2006 |
| Tampereen Tuulilasimyynti Oy | Other services | 2000 |
| Tampereen Työväen Kesäkoti O.Y. | Real estate | 1939 |
| Tampereen Työväen Teatteri Oy | Arts & recreation | 1941 |
| Tampereen Tähtigrilli Avoin Yhtiö | Hospitality | 2024 |
| Tampereen Urheilulääkäriaseman Kuntoutuskeskus Oy | Health & social care | 1991 |
| Tampereen Vaahtomuovi Oy | Wholesale & retail | 1985 |
| Tampereen Vaakatekniikka Oy | Manufacturing | 2003 |
| Tampereen Vaihtokone Oy | Real estate | 1961 |
| Tampereen Vapakalastus Ky | Wholesale & retail | 1992 |
| Tampereen Vera Oy | Construction | 2005 |
| Tampereen Vesi Oy | Water & waste | 2023 |
| Tampereen Vesileikkaus Oy | Manufacturing | 1991 |
| Tampereen Vesilelu Oy | Administrative & support | 2001 |
| Tampereen Viemärihuolto Oy | Water & waste | 2023 |
| Tampereen Viestintäasennus Oy | Construction | 1989 |
| Tampereen Viherrakennus Oy | Administrative & support | 2015 |
| Tampereen Vinoteque Oy | Real estate | 1983 |
| Tampereen Vohvelikahvila Oy | Hospitality | 1998 |
| Tampereen Voimaluola Oy | Arts & recreation | 2014 |
| Tampereen Vuokra-asunnot Oy | Real estate | 2000 |
| Tampereen Vuokratontti Oy | Real estate | 2023 |
| Tampereen Väripalvelu Oy | Wholesale & retail | 2008 |
| Tampereen Yleiskopio Oy | Administrative & support | 1966 |
| Tampereen Yläkuppila Oy | Hospitality | 2025 |
| Tampereen Yrityskehitys Oy - TYK Ltd | Professional & scientific | 1991 |
| Tampereen Yritysneuvonta Oy | Professional & scientific | 2011 |
| Tampereen Yritystilat Oy | Professional & scientific | 1995 |
| Tampereen Yritysviestintä Oy | Information & communication | 1989 |
| Tampereen ammattikorkeakoulu Oy | Education | 1995 |
| Tampereen jyvä Oy | Hospitality | 2019 |
| Tampereen kauppapaikat Oy | Wholesale & retail | 2018 |
| Tampereen kaupunkiseudun elinkeino- ja kehitysyhtiö Business Tampere Oy | Professional & scientific | 2009 |
| Tampereen klinikkarakennus Oy | Real estate | 2015 |
| Tampereen kokoelmahalli Oy | Arts & recreation | 2018 |
| Tampereen kuntoutuspaja osk | Real estate | 2023 |
| Tampereen lemmikkitarvike oy | Wholesale & retail | 2013 |
| Tampereen lyönti ja lävistys Oy | Other services | 2017 |
| Tampereen ravintola-konditoria Kokkipoika Avoin yhtiö | Hospitality | 2004 |
| Tampereen restonomiopiskelijat osk | Hospitality | 2018 |
| Tampereen seudun osuustoimintakeskus | Professional & scientific | 2001 |
| Tampereen suuhoito Oy | Health & social care | 2020 |
| Tampereen tallipuoti Oy | Wholesale & retail | 2024 |
| Tampereen teknillinen osuuskunta | Professional & scientific | 2005 |
| Tampereen tekninen konsultointi Oy | Professional & scientific | 2012 |
| Tampereen yritys- ja isännöintipalvelu Oy | Real estate | 2016 |
| Tampinkosken Mylly Oy | Hospitality | 2017 |
| Tamplast Oy | Manufacturing | 2006 |
| Tamppi Pysäköinti Oy | Real estate | 2005 |
| Tampyy Oy | Professional & scientific | 1998 |
| Tamrala Oy | Real estate | 1953 |
| Tamrav Oy | Hospitality | 2016 |
| Tamrex Oy | Wholesale & retail | 1989 |
| Tamrock Oy | Financial services | 1935 |
| Tamsafe Oy | Wholesale & retail | 2020 |
| Tamsale Oy | Wholesale & retail | 1983 |
| Tamsara Oy | Construction | 2015 |
| Tamseco Oy | Administrative & support | 2024 |
| Tamsharp Oy | Wholesale & retail | 2015 |
| Tamski Consulting Oy | Administrative & support | 2023 |
| Tamski Lääkäripalvelut Oy | Health & social care | 2024 |
| Tamstat Oy | Professional & scientific | 1989 |
| Tamsub Oy | Manufacturing | 2016 |