WSE-listed gas giant PGNiG had PLN 499 million attributable net profit in Q2, up from PLN 115 million loss a year ago. Revenues increased by 12.5  percent to PLN 7.16 billion, while EBITDA amounted to PLN 1.4 billion, up by 90.8 percent. The core segment of gas trade and storage generated a PLN 268 million…