The formal stock market listing of Aer Lingus begins today.
Trading on the grey market in Aer Lingus shares began last Wednesday when stock became available at €2.20 per share. The shares were priced at €2.48 at the close of trading on Friday night.
Investors who bought shares in the flotation will have them credited today to their individual accounts on the electronic Crest system, which are managed on their behalf by brokers.
Trading before today's formal listing was conditional on the flotation going ahead.
If, for any reason, the flotation had been cancelled after grey market trading started, dealings in the stock would have been cancelled and any losses would have been the responsibility of the parties involved.
Although joint bookrunner Goodbody was the only broker dealing in Aer Lingus shares last week, other brokers will start to make a market today.
The Government is holding on to a 28.3 per cent stake in Aer Lingus after the flotation.
This includes a core stake of 25.1 per cent and 2.5-2.6 per cent for potential distribution to the airlines' employee share ownership trust, which will have a 12.3 per cent stake after the flotation.