Igal Zamir, the president of Mapco Express, has taken advantage of the huge run in shares of Delek US Holdings — they're up more than 50 percent in the past three months — and exercised a bunch of his options. Zamir exercised more than 220,000 options last Friday and, after forfaiting a chunk of those to cover most of his costs, sold more than $1.6 million worth of shares. Zamir joined Mapco in 2009 from energy-efficient lighting manufacturer Metrolight.