LAS VEGAS— Karen Brandvold, the first woman to lead NAHAD, handed the gavel to the association's new president during the group's annual convention in Las Vegas.

COLOGNE, Germany—Lanxess is rearranging its additives business into three units, up from its current structure of two.

KODAK, Tenn.—Rep Corp., a subsidiary of Lyon, France-based Rep International, has named a new president.

BRAMPTON, Ontario—Hankook Tire has promoted In Hyuk Rhee, a 26-year Hankook Tire veteran, to president and CEO of Hankook Tire Canada.

VIENNA—Semperit Holding has extended the management board mandate of Felix Fremerey until Nov. 30, 2020.

KIYOSU, Japan—Toyoda Gosei is responding to the rapidly changing landscape of the automotive industry by restructuring its management to ensure it can respond more quickly to industry needs.

MANCHESTER, England—Additives supplier Castle Chemicals has appointed Bryan Davies as its new chairman to lead the company's international growth and environmental initiatives.

MADISON, Tenn.—Bill Sweatman will end his 16-year tenure as president and CEO of Marangoni Tread North America on May 1, when he officially retires from the company.

HOUSTON—Kraton has appointed Atanas Atanasov as senior vice president and chief financial officer, effective May 6.