Siemens AG, Europe's biggest engineering company, will buy a 16 percent stake in a medical equipment venture with drugmaker Mochida Pharmaceutical Co., giving it a majority holding, Mochida announced Monday.

After the Oct. 1 transaction, Siemens will hold 51 percent of the venture, with the remainder owned by Mochida. The venture has 130 employees and generated revenue of ¥5.6 billion in its last business year. Mochida said the transaction will have little impact on earnings this year.