FRANKFURT (Reuters) – Siemens Energy on Saturday said it would offer 18.05 euros ($19.06) per share for the remaining third it does not already own in Spanish-listed Siemens Gamesa, hoping to remove a complex ownership structure that has weighed on its shares. Siemens Energy said the bid constitutes a premium of 27.7% over the last unaffected closing share price of wind turbine maker Siemens Gamesa of 14.13 euros on May 17. ($1 = 0.9470 euros) (Reporting by Christoph Steitz and Ludwig Burger; Editing by Nick Zieminski)