Unions at Aer Rianta have called for an urgent meeting with the Minister for Transport, Mr Brennan, to discuss what they call "media and political speculation" about the future of the company.
The request came as their leaders warned against the break-up of the airport management body, and what SIPTU's national industrial secretary Mr Noel Dowling said was the attempt by "special interest groups" to benefit.
In a statement issued after a meeting of the company's group of unions, Mr Dowling added: "We have been the target of criticism from vested interest groups in recent years, who are attempting to undermine a successful semi-State enterprise for their own selfish interests.
"The logic of the maxim, 'if it's not broken, don't fix it,' does not seem to apply, but rather their cry is 'change for the sake of change'.There are calls for the break-up of the airport group to create more localised control in the individual airports. These are outward manifestations of the real objective of these parties which is an attempt to acquire State assets at knock- down prices."
Mr Dowling said Aer Rianta was one of the success stories of the semi-State sector and had been a substantial net contributor to the Exchequer over the years.
While returning dividends to State coffers, the company had been obliged to embark on major capital expenditure programmes at its three Irish airports since the late 1980s. The necessary developments to accommodate the growth in air transport had to be funded from within Aer Rianta's own resources and borrowings, as Aer Rianta did not receive any financial aid from the State.
He added: "Serious misconceptions regarding the functions of the board and financial structure of the company are contained in statements emanating from proponents of the break-up of the company.
"The board of Aer Rianta takes the major strategic decisions for the company. The day-to-day running and promotion of the airports is carried out by management at the individual airports. The board (including three elected worker directors) is appointed by the Minister.
"Would not localised boards be appointed by the same Minister? If there is something deficient in the current Government appointed board, is there any reason why separately appointed boards would be any different?"
The appointment of separate boards only imposes a further layer of bureaucracy in the decision-making process, Mr Dowling suggested, adding that the group of unions would fight to retain the three airports as part of the one company group.