An outpost of the New York stock exchange is to open in Belfast.
More investment is expected to be attracted after the premises were unveiled on Thursday.
NYSE Technologies is the technology arm of NYSE Euronext, a leading global operator of financial markets and provider of innovative trading technologies. The company's move to the new premises is being supported by Invest Northern Ireland.
NYSE Euronext chief executive Duncan Niederauer said: "We welcome the opportunity to partner with Invest NI and to expand our presence in Belfast.
"These exceptional facilities complement NYSE Euronext's other European technology centres in Paris and London, and will allow us to realise our growth plans both in Belfast and globally.
"Our experience with regard to operating in Northern Ireland has been very positive and I believe that this centre of excellence, a true centre of innovation, in Belfast will continue to contribute significantly to our success and that of our customers."
Up to 400 jobs will be created in the years ahead.
First Minister Peter Robinson said: "This state-of-the-art development facility is a fitting home for a company that is at the forefront of software development for the global trading markets.
"NYSE Technologies' further expansion of its Belfast operation reflects its confidence in Northern Ireland and is an example of the mutual benefit to be gained from ongoing engagement between those of us involved in economic development and key investors."
Deputy First Minister Martin McGuinness said: "NYSE Euronext's endorsement of our local talent, our people and our future sends a strong message to other potential investors, that this is an exceptional place to do business."