Shares in Computershare surged higher after the registry posted a 2.4% rise full year profit to $157.334 million.
A short time ago, its shares were up almost 11% to $9.93.
The result was on a 0.5% slide in revenue to $1.961 billion.
Computershare expects 2017 earnings to be slightly up on 2016.
CEO Stuart Irving says the company has started a review of costs.
The company declared a final dividend of 17 cents a share, bringing the 2016 total to 33 cents, a 6.5% increase on 2015.
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