French hedge fund manager Fincapital has slammed the chairman of Unilabs, claiming the Swiss laboratory services company's takeover by a rival favours him at the expense of minority shareholders.

Unilabs yesterday agreed a takeover from Swedish rival Capio Diagnostics, owned by buyout firms Apax and Nordic Capital, that would value the company at Sfr700m (€420m), a premium of almost a third to its recent trading price.