Rio Tinto

It’s no exaggeration to say Saskatchewan-based Power Prospector Tim Gitzel is powered by fuel and food. His corporate involvement spans both nuclear giant Cameco (CCO) and NYSE-listed fertilizer play The Mosaic Company (MOS*US), and lately he’s been adding to his stake in both companies.

Brendan Bell, the acting CEO of Dominion Diamond (DDC), took an unconventional route to the C-suite. Neither a geologist nor an investment banker, Bell was a cabinet minister in the Northwest Territories before joining the northern diamond producer in July 2013. As the company's stock has plummeted recently, Bell has been buying. He purchased 5,000 shares at $18.14 on June 25, following that up with another 5,000-share buy four days later at $17.65.