These included collegiality with other "like-minded" advisers, and with significant changes in legislation it was beneficial for advisory groups to have a central voice to communicate with government.
Located in Hastings since 1986, Stewart Group have six professional financial advisers, five who are authorised financial advisers, and provide full investment and risk management services including KiwiSaver.
Together, the group's professional adviser team have more than 120 years of combined experience in the financial services industry.
The team also has access to a "back office team" of professionals to ensure that the firm is effective and fully compliant with the financial adviser regulatory regime.
Plus4's chairman Grant Uridge said the announcement marked a milestone in Plus4's development.
"As a result, the group will not only substantially increase its presence in Hawke's Bay but also signal its growing presence to the wider financial sector that it is a growing force in the market," he said.
"With the six Stewart Group advisers joining the group, we now have 38 advisers across the country from Whangarei to Invercargill."
Established in 2008, Plus4 Group members, who have no affiliations to any specific insurance provider, use independent research to identify the solutions that best meet their individual and business clients' requirements.
Plus4 members work predominantly with small- to medium-sized enterprises, their owners and their accountants.