In the six months to the end of September the mineral testing and consulting company posted a net profit of $102.3 million.
Revenue rose 22 per cent to $667.5 million, boosted by growth in all divisions of the ALS laboratory services business.
Campbell Brothers advises trading in October and November has remained very strong and the company expects to deliver a full year after tax profit, excluding unusual items, of between $200 million to $220 million.
An interim dividend of 95 cents per share, 50 per cent franked, has been declared.
In the 2011 financial year Campbell Brothers increased its net profit by 75 per cent to $132 million.