The awards, which are designed to recognise best practice on company websites in eight different categories, are to be awarded at a dinner on 1 April.
The main categories are for private investors, professional investors, most improved website, European website and smaller quoted company website.
Two further Grand Prix recognise best practice website for a FTSE 250 and FTSE 100 company.
The shortlist for all seven categories will be used to find a winner for the Grand Prix IR Best Overall website award.
Among those shortlisted, Countryside Properties, Honeygrove Group and British Land are named in three categories.
IRS chairman Diane Faulks said the awards were designed to encourage better use of internet technology by listed companies. It looks in detail at aspects including shareholder information, corporate governance, timeliness and navigation.