ISA Full-Year 2018 Profits Rise 6% Year-on-Year Medellin-based multinational electric power transmission operator and highways concessionaire ISA announced March 7, 2019 that its full-year 2018 net income rose 6% year-on-year, to COP$1.5 trillion (US$483 million). Revenues also rose 4% year-on-year, to COP$7.2 trillion (US$2.3 billion), while earnings before interest,