The Dublin Port Company has confirmed it has launched an investigation into the source of the data leak to establish how it occurred and by whom it was carried out.
This follows recent media reports regarding the company, detailing expenditure on credit cards.
The company said external expert investigators are being appointed to carry out a forensic analysis to determine how this occurred and who is responsible.
Dublin Port said it wishes to establish the motivation behind the selective leaking of commercial information which it said appears designed to create an incorrect and damaging perception of inappropriate spend by the company.
The company has also reported the issue to the relevant authority, the Data Protection Commissioner.