Vista Group could be on its way to joining the S&P/NZX 50 after major shareholders sold a quarter of the cinema software developer.

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20 shareholders in VistaGroup International will sell about a quarter of the company's stock to institutions and retail brokers at a 6.3 percent discount.

Auckland-based Vista International is questoned by the NZX about a 27 per cent decline in its share price this year.

Vista Group has been one of the big success stories among the flurry of firms that floated on the sharemarket last year.

Kiwi cinema software developer Vista Group International has signed a deal with the second-largest theatre chain in the United States, AMC Theatres.

Murray Holdaway is an unlikely star of the silver screen.

It's shaping up to be another bumper year for the NZ sharemarket, with the NZX 50 up more than 14pc and trading at record levels.