Andrew Blattman, the CEO and managing director of international intellectual property services group IPH has sold approximately $400,000 in shares, citing "personal tax obligations" related to the incentive plan.

Blattman remains the largest individual shareholder, retaining interests of 2,152,216 shares or around 0.9% of issued capital and 411,604 performance rights.

The sale occurred in line with the company's share trading policy and was conducted during the trading window.