The Irish Stock Exchange has said its ISEQ Overall Index grew by 15% last year, with the number of equity transactions also rising during the year.

In its review of 2014, ISE said its main index recorded 4.5m trades in the 12 month period – up 30% year-on-year.

This follows significant growth in 2013, when the index grew by 34% and saw trades rise by 42%.

The ISEQ also welcomed three new companies during the year with Dalata, Irish Residential Properties REIT and Mainstay Medical all launching Initial Public Offerings.

The firms raised €484m between them as part of these launches.

However the exchange has been hit by a number of high-profile exits in recent years, as some firms opt to list exclusively in London instead.

ISE also said it added 7,000 new debt listings and 1,600 new fund classes to its books, giving it a total of 32,000 securities from 85 different countries by the end of the year.

During the year ISE became a public limited company as part of its attempts to grow business internationally.

It said it was also planning to launch a programme to support firms considering an IPO and was in the process of increasing staff levels to deal with extra business volumes.