Mullen said NorthWest was benefiting from having such a big interest in Vital yet unit holders were losing out because lower returns were being paid to investors.
"We as New Zealand shareholders who started all this off have not gained a lot out of if financially or otherwise. The only thing is we have got is a larger unit trust," Mullen said of Vital's purchase of many Australian properties. "Long-term shareholders have not seen the benefits. The people making money are NorthWest."
Horsley said perhaps Mullen should buy units in NorthWest.
"I'd be interested to see whether other people are concerned about performance over the last five to 10 years," Horsley told the meeting. "If you went back and looked at the charts, Vital has out-performed any of the New Zealand REITs [real estate investment trusts] over the 10-year period, so I'm not sure you can start saying a criticism of performance."
The board is projecting unitholders will get 7.9c a unit distribution for the 2014 financial year, said Vital chief executive David Carr.
Vital owns the $80.5 million Greenlane Ascot Hospital & Clinics.
Units in Vital closed up 1c yesterday at $1.31.