Further afield, its software is used in "marquee" international airports including Hong Kong, JFK in New York, Newark Liberty, Sydney, Melbourne and Birmingham, as well as in Auckland, Christchurch and Wellington.
About 89 per cent of the company's revenue comes from utilities and about 10 per cent comes from airports.
Chief executive James Docking was quick to differentiate the company from high-growth technology companies such as Xero, Wynyard and SLI - all stocks that attracted heavy selling over March and April when fears about the sector started to emerge in the United States.
Docking said Gentrack was profit-driven, in contrast with stocks like Xero, which is yet to make profit and which does not expect to make one for several years.
To that end, the offer documents point to Gentrack's forecast net profit of $3.7 million in 2014 and $9.3 million in 2015.
Docking said shares in the company's closest peer, TechnologyOne - Australia's largest publicly listed software company - performed strongly over March and April while others in the high growth/technology space suffered.
Gentrack competes head-to-head with multinational software giants SAP and Oracle.
Docking, who has been with the company for 20 years, said Gentrack implemented its own software with customers, unlike its major competitors, which used third parties.
The offer comprises the issue of up to 18 million new ordinary shares to raise $36 million of new capital and the sale of 26.3 million existing shares at an indicative price range of $2 to $2.50 per share.
It will have institutional and retail components but there will be no public pool. Capital raised through the issue of new shares will be used to pay down Gentrack's existing debt of $33.1 million. Existing shareholders will continue to own just over 40 per cent of the company. Chairman John Clifford and Docking will be the two biggest shareholders, with 15 per cent and 10 per cent, respectively.
Of the company's 21 shareholders, 14 of them will sell a portion of their holdings. Gentrack's directors and senior management own the majority of the shares after a management buyout in 2012.
Clifford said Gentrack had built a profitable business with compound growth of earnings before interest, tax and amortisation of 16.1 per cent a year over the past five years.
Docking has been running it since 2003. He has a background in engineering and was previously with the then state-owned Electricity Corp - the forerunner to New Zealand's power-generating companies.
UBS New Zealand is lead manager for the offer.
Gentrack
• Provides specialised software for utilities and airports.
• Shares issued at $2 to $2.50, raising up to $101.8 million.
• Funds to be used to pay down debt and to enable partial sell-down.
• NZX, ASX listing expected on June 25.
• 2014 net profit forecast $3.7m, rising to $9.3m in 2015.
