Japan Post Holdings pulled off the biggest global IPO of 2015 (and one of the biggest in history), raising more than 1.4 trillion yen ($12 billion) when it went public last fall. The government-owned firm plays an eclectic mix of roles iin Japan’s economy–it’s part post office, part banking behemoth, and part insurance giant. Last year’s historic three-pronged public offering was a carefully constructed privatization scheme a decade in the making and a central part of Japanese Prime Minister Shinzo Abe’s efforts to jolt a sleepy economy with a healthy dose of investor money. Japan Post has been on a mission to become a major player in the global logistics business and competitor to forms like FedEx. To this end, the firm snapped up Australia’s Toll Holdings in a $5 billion acquisition last February–a deal which recently delivered Japan Post the business of Asian retail giant Aeon. Newly-appointed CEO Masatsuga Nagato has said the company will continue looking for strategic buyout opportunities. Investor enthusiasm for Japan Post has died down considerably since the IPO, however. Shares are down more than 25% since November.