TRM S.p.A. is a mixed capital company (80% of shares are held by Iren Ambiente S.p.A. and 20% of shares are held by public shareholders.
Among the public shareholders we can note the Municipality of Turin (that holds approximately 16% of the shares).
A breakdown of the shareholding structure is provided in the following table:
| Name | Share Capital % |
|---|---|
| Iren Ambiente SpA | 80.0000 |
| Torino | 16.5134 |
| ACEA Pinerolese | 1.8434 |
| Consorzio ACEA | 0.1174 |
| Almese | 0.00056 |
| Borgaro Torinese | 0.03881 |
| Brandizzo | 0.01171 |
| Brozolo | 0.00340 |
| Buttigliera | 0.00200 |
| C.A.D.O.S. | 0.29416 |
| Casalborgone | 0.00495 |
| Caselle Torinese | 0.05578 |
| Castagneto Po | 0.00457 |
| Castiglione Torinese | 0.00937 |
| Cavagnolo | 0.00130 |
| CCS | 0.12719 |
| Chivasso | 0.04040 |
| Cinzano | 0.00327 |
| Covar 14 | 0.23042 |
| Druento | 0.00356 |
| Foglizzo | 0.00538 |
| Gassino Torinese | 0.00346 |
| Grugliasco | 0.00667 |
| Lauriano | 0.00455 |
| Leinì | 0.20932 |
| Lombardore | 0.04440 |
| Montanaro | 0.02845 |
| Monteu da Po | 0.00115 |
| Rivalba | 0.00402 |
| San Benigno Canavese | 0.04151 |
| San Mauro | 0.00400 |
| San Raffaele Cimena | 0.00624 |
| San Sebastiano da Po | 0.00659 |
| Sciolze | 0.00464 |
| Settimo Torinese | 0.11786 |
| Torrazza Piemonte | 0.00565 |
| Venaria | 0.15630 |
| Verolengo | 0.00191 |
| Verrua Savoia | 0.00108 |
| Volpiano | 0.04112 |