The news of Sir Allen McClay passing has saddened many, it has been said that McClay, 77, was the most successful business man ever produced in the pharmaceutical industry.
Leaving behind his wife, Heather in who he married last November in hospital.
McClay qualified as a pharmacist in 1953 and 15 years later he established his own company Galen in 1968.
Out of this company, he became a multi millionaire, as it was a world leading bio-tech and pharmaceutical company, this made him one of Irelands richest men.
Honours have been paid to Sir Allen by the NI deputy first minister, Martin McGuinness, and the chief executive of Almac.
Mr McGuinness said: “I know that I will echo the thoughts of many when I say that we have not only lost a wonderful businessman but also a true gentlemen”.
It’s a shame to see such a great man pass.