A principal stockholder of Inveresk Research is selling 5 million shares in the company at $26.75 per share.

The company the stock sale is being handled by Goldman, Sachs & Co.

The stock (Nasdaq: IRGI was priced well under Wednesday’s close of $28.42.

In midday trading Thursday the stock was off 4.3 percent to $27.20.

Inveresk: www.inveresk.com