| ROMA | Institution | 108.611.640 | 51,10% | 2,34B € | 2025-06-30 |
| Veolia Environnement SA | Institution | 41.172.504 | 19,37% | 888,50M € | 2026-03-18 |
| FGC Spa | Institution | 8.810.320 | 4,15% | 190,13M € | 2025-06-30 |
| Finanziaria Italia 2005 Societa Per Azioni | Institution | 2.500.197 | 1,18% | 53,95M € | 2025-06-30 |
| Amundi Asset Management SAS | Institution | 1.583.273 | 0,74% | 34,17M € | 2026-02-27 |
| Vanguard Capital Management, LLC | Institution | 1.339.491 | 0,63% | 28,91M € | 2026-05-31 |
| BlackRock, Inc. | Institution | 1.060.466 | 0,50% | 22,88M € | 2026-05-31 |
| Dimensional Fund Advisors LP | Institution | 1.048.957 | 0,49% | 22,64M € | 2026-05-29 |
| Norges Bank Investment Management | Institution | 748.375 | 0,35% | 16,15M € | 2025-12-31 |
| Vanguard Fiduciary Trust Company | Institution | 377.263 | 0,18% | 8,14M € | 2026-05-31 |
| Capitolium Srl | Institution | 300.279 | 0,14% | 6,48M € | 2025-06-30 |
| Tareno International Asset Managers | Institution | 295.000 | 0,14% | 6,37M € | 2025-12-31 |
| Eaton Vance Management | Institution | 234.093 | 0,11% | 5,05M € | 2026-01-31 |
| Schroder Investment Management Limited | Institution | 232.260 | 0,11% | 5,01M € | 2025-12-31 |
| Deutsche Asset & Wealth Management | Institution | 146.778 | 0,07% | 3,17M € | 2025-12-31 |
| Charles Schwab Investment Management, Inc. | Institution | 145.178 | 0,07% | 3,13M € | 2026-05-29 |
| Ersel Asset Management Sgr S.p.A. | Institution | 139.000 | 0,07% | 3,00M € | 2025-06-30 |
| KBC Asset Management NV | Institution | 136.277 | 0,06% | 2,94M € | 2025-12-31 |
| American Century Investment Management Inc | Institution | 135.854 | 0,06% | 2,93M € | 2026-05-29 |
| Eurizon Capital SGR SpA | Institution | 133.794 | 0,06% | 2,89M € | 2025-12-31 |
| Allianz Asset Management GmbH | Institution | 132.789 | 0,06% | 2,87M € | 2025-09-30 |
| UBS Asset Management AG | Institution | 116.712 | 0,05% | 2,52M € | 2025-12-31 |
| Morgan Stanley Investment Management Inc. | Institution | 113.229 | 0,05% | 2,44M € | 2025-12-31 |
| Azimut Capital Management Sgr SpA | Institution | 94.980 | 0,04% | 2,05M € | 2025-06-30 |
| ING Bank N.V. | Institution | 90.259 | 0,04% | 1,95M € | 2025-06-30 |
| Fideuram - Intesa Sanpaolo Private Banking Asset Management S.G.R. S.p.A. | Institution | 85.078 | 0,04% | 1,84M € | 2025-08-31 |
| AC Partners AG | Institution | 85.000 | 0,04% | 1,83M € | 2024-12-31 |