aventron AG is 61.4% owned by aventron holding AG.  The only other investors with more than a 3% shareholding in aventron are Stadtwerk Winterthur with 10%, the UBS Clean Energy Infrastructure Fund II with 8.1% and Reichmuth Infrastruktur Schweiz with 4.7%.

aventron AG shares are listed on the Bern stock-exchange with 20.5% of the equity in free float (shareholders with stakes below 5%).

There exists 34’105’382 shares.