Among executives, board members, analysts and others in the business world in recent days, a “who’s who” list has been floating around, showing which companies have pulled out of Russia amid its attack on Ukraine — and which ones have stayed put. The spreadsheet, compiled by Yale University professor Jeffrey Sonnenfeld and his research team, has become a naughty-or-nice list of sorts, with CEOs trying their best to avoid being placed on the roster of “Companies That Remain in Russia With Significant Exposure.” Sonnenfeld, who founded the nonprofit Chief Executive Leadership Institute, said he has fielded calls from CEOs asking...