Mr Michael Lowry is a director of four companies, including a British property company, according to the new register of TDs' interests.
The former Fine Gael minister for transport, energy and communications, said he was a director of Vineacre Ltd, a property company in Bedfordshire.
He said he owned a private residence, Glenreigh, in Holycross, Co Tipperary, on 35 acres, which was leased, and had a 10 per cent interest in a property site of 2-1/2 acres at Chesterfield Road, Glapwell, Marsfield.
His involvement in a property transaction in Marsfield is currently under investigation by the Moriarty tribunal.
Mr Lowry is also a director of Garuda Ltd, a Thurles refrigeration company which trades as Streamline Enterprises; an air-conditioning company, Instore Cooking; and a refrigeration and general consultancy services company, Abbey Green Consulting.
The register of interests for members of the Dail and the Seanad is for February 1st, 2000, to January 31st, 2001.
Mr Ned O'Keeffe (FF), who resigned as minister of State at the Department of Agriculture in a row over his failure to declare an interest during a Dail debate, disclosed details of his agri-business at Ballylough, Mitchelstown, Co Cork.
In a detailed entry, Mr O'Keeffe said his pigs were now fed fishmeal under licence. He said 90 per cent of the feed was supplied by Ballylough Milling, and "previous to this and for as long as I can remember" pig feed had been mixed and compounded on his farm.
He said an application was made and a number of inspections took place, and the farm had met the criteria. "This was the main reason that the Meat-and-bonemeal licence was approved and issued in the name of Mr Patrick O'Keeffe, a director of Ballylough Milling."
In his declaration of shares held, Mr O'Keeffe, who owns a total of 195 acres in Mitchelstown, said he had shares in Ballylough Milling, but these did not exceed £10,000.
The Taoiseach, Mr Ahern, declared he held no shares, no directorships and no land. While he received honorary memberships of two golf clubs he would get no "material benefit" because he did not play golf. He declared his constituency office, in Drumcondra, estimating the value of its use at £9,000 a year.