The wind farm, with an installed capacity of 732 megawatts (MW), has been operational since 2021 and generates enough power each year to cover the demand of around 825,000 Dutch households, Octopus Energy said.
Octopus' generation arm acquired the stake from private markets firm Partners Group.
The British company already owns the 19 MW Borssele V offshore wind farm in the Netherlands.
The latest acquisition also follows an announcement earlier this month for an investment in Norway-based offshore wind developer Deep Wind Offshore.
