WKU held significant claims against Windreich that could not be met, which comes after Windreich filed for insolvency last week.
New Windreich managing director Werner Heer said: "Given the close connection of these two companies this was a logical step.
"With this measure, we can create more certainty with respect to the ongoing offshore projects for our investors. The offshore project I MEG continues without limitation."
WKU employs 31 people in Wolfschlugen and Hamburg.