There were 354 motor vehicle claims costing $3.12m and 14 marine insurance claims resulting in a cost of $110,000.
The March storm was one of a number of natural hazard events to hit New Zealand so far this year and bring the total to insurance claims to $174.7m.
Tim Grafton, chief executive of the Insurance Council, said the weather bombs seen in recent months highlighted the importance of having insurance when disaster strikes.
"We would hope that uninsured renters are now taking steps to ensure their contents are protected to see them through these types of events.
"And for homeowners that they check their sum insured is enough to rebuild in the event of a total loss," he said.