Po Valley Energy Ltd non executive chairman Graham Bradley spent $506,500 to increase his interest in the company. The additional stake was bought by way of exercise of options and on market trade. His stake in the company is now worth $1.5 million.Red Hill Iron directors Joshua Pitt and Neil Tomkinson have boosted their stake in the company by 134,631 shares worth $306,959. The on market trade took their jointly held stake to a total value of $18 million.Golden West Resources executive director Michael Wilson offloaded $206,000 worth of shares, he retains a stake valued at $1.2 million.