(VOVworld) – A ceremony was held in Ho Chi Minh City on Tuesday to announce Vietnam’s top 500 businesses of 2015. The state-run Vietnam Oil and Gas Group (PetroVietnam) ranks first in the list, followed by Samsung, Vietnam National Petroleum Group, Vietnam Electricity, and Viettel Group. The ceremony honored businesses with significant contributions to Vietnam’s economic development over the past years. The ranking acknowledges businesses’ achievements in a fiscal year, focusing on their revenues, growth, and credibility.