Essential Solutions with Extraordinary Results SI Group is a global leader in the innovative technology of performance additives, process solutions, active pharmaceutical ingredients, and chemical intermediates. Our solutions are essential to many diverse industries and applications, creating extraordinary results. We drive value by enhancing the quality, performance, and durability of countless items we use every day. We are on a journey to captivate our customers at every level. Whether that means expanding our capabilities, global reach, or providing new innovations and technologies that create value. Our approach is customized to exceed customer needs and deliver superior performance.