American Superconductor (AMSC) will close its Middleton plant by Dec. 31 and transfer those operations to its headquarters in Devens, Mass.
The company declined to disclose the number of Middleton employees affected but said they will be offered positions in Devens. The plant, at 8401 Murphy Drive, makes a voltage regulation and control device for use on the electric transmission grid.
The announcement is “very unfortunate,” said Mike Davis, Middleton city administrator. “They’ve been a sound employer in Middleton as long as I can remember.”
The closing is part of a series of “strategic operational initiatives” AMSC announced on Wednesday. They include reducing wind power manufacturing in China to Chinese customers and opening a new production center in Romania for other wind customers worldwide.
AMSC said it will cut its total staff between 5 percent and 10 percent, or up to 120 employees, spokeswoman Kerry Farrell said, among its Middleton, Massachusetts and Chinese sites.
AMSC also has operations in New Berlin, which will not be affected. As of 2011 — the most recent figures available — the company said it had more than 100 employees in Wisconsin but did not break down the numbers between Middleton and New Berlin. Madison Gas and Electric’s 2013 High-Tech Directory lists the Middleton plant at 100 employees.
American Superconductor came into the local market in 1997 when it acquired Superconductivity Inc. for nearly $16 million.