Three stations were sold for a combined US$21.8mn.
The company cut both costs and expenses last year, and enjoyed a smaller FX loss.
The book building process will start on January 30.
Río Negro province is requesting the company restart operations at the Sierra Grande iron ore mine.
The country continues to investigate Brazilian construction giant Odebrecht and its efforts to secure contracts through bribes.
The federal government is not fully convinced by the port industry's idea to extend port contracts without the need to hold new tenders, a local daily reports.
The Altán consortium and Mexico's telecom investment promotion organisms Promtel signed a public-private partnership, officially marking the deployment of the country's wholesale shared 4G network. Altán must begin commercial operations by March 2018.
Infrastructure projects including highways and schools will spur GDP growth in Colombia this year, according to the country's finance minister.