It’s not just Ivan Glasenberg who’s regained his appetite for dealmaking. Qatar, the world’s largest exporter of liquefied natural gas, is investing alongside the billionaire’s Glencore Plc in an $11 billion deal to buy 19.5 percent of Russia’s Rosneft PJSC. The Qatar Investment Authority is part of a group of investors that on Thursday agreed to take a 61 percent stake in the U.K. gas-distribution business of National Grid Plc. The sovereign wealth fund is also interested in putting money into Italian lender Banca Monte dei Paschi di Siena SpA , Il Sole 24 Ore reported. Qatar — known for making trophy European investments ranging from Credit Suisse Group AG to London department store Harrods during the days when oil was trading at more than $100 a barrel — scaled back as crude prices slumped and the government reshuffled the fund’s […]