Solstice Advanced Materials is trading 6.69% up at €55.78 after activist investor Starboard Value disclosed a stake and called for improvements to the company’s performance. - Starboard wants the company to focus on its refrigerants and nuclear businesses. - It also wants Solstice to cut about $100 million in costs, according to Reuters. - The market indices listed for the session were unchanged; the activist news was the clearest reported catalyst for the October 21 move.