“There are big value arbitrages to be had in the Canadian market,” says investor Matt Proud of Plantro Ltd.

A year ago, Matt Proud was under siege from activist investors trying to effect changes at Dye & Durham Ltd. DND-T , including his ouster as chief executive.

Since then, Mr. Proud has become an activist shareholder to be reckoned with in his own right.

After leaving D&D last December, the 44-year-old entrepreneur has targeted three Toronto Stock Exchange-listed companies through his private holding company Plantro Ltd.: Information Services Corp. (ISC), Calian Group Ltd. – and D&D. Each has paid off so far.

And Mr. Proud isn’t finished. “There are big value arbitrages to be had in the Canadian market,” he said in an interview. “A lot of companies are trading at discounts to whe

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