The debt owed by Prestwick Airport to the Scottish government has risen in the past year from £30m to £38.4m.
That was while revenue rose through a doubling of funds from refuelling aircraft at the publicly-owned facility.
Accounts lodged with Companies House show the holding company made a loss of £7.6m in the year to March, down from £8.6m the previous year.
Read more: https://www.bbc.com/news/uk-scotland-scotland-business-46730491