 The company is entirely owned by 22 municipalities as well as Nordmøre Energiverk, though organized as a limited company.The owners are the municipalities of Agdenes (2.32%), Bjugn (5.69%), Frøya (2.75%), Hemne (4.88%), Hitra (2.54%), Holtålen (1.49%), Malvik (2.71%), Melhus (14.66%), Midtre Gauldal (3.51%), Nordmøre Energiverk (3.99%), Oppdal (3.25%), Orkdal (11.70%), Osen (1.02%), Rissa (8.87%), Roan (1.05%), Selbu (1.39%), Skaun (4.98%), Snillfjord (1.34%), TrønderEnergi (2.63%), Ørland (2.79%), Åfjord (4.15%), Trondheim (10.00%), Klæbu (0,10%).The company was founded in 1950 as an inter-municipal agency named Sør-Trøndelag Elektrisitetsverk, later changing its name to Sør-Trøndelag Kraftselskap and finally to the limited company TrønderEnergi AS.