Hikma Pharmaceuticals is leading the FTSE 250 this morning, up 7.5% at £20.62, after it lifted its sales forecast as it supplies more opioid painkillers to the US which is experiencing a shortage.
Its full-year outlook has been boosted by both its injectables division and its generic drugs business.
Auto Trader's shares made good gains, 3.4% ahead at 454.2p, following a 9% rise in interim pre-tax profits to £114.5m on sales 7% higher at £176.8m.
Shares in sugar and sweeteners firm Tate & Lyle rose 2.9% to 705.4p on higher interim sales and profits.
The FTSE 250 is up 0.85% at 19,309.42.
Satellite operator Inmarsat is the biggest faller on the FTSE 250, down 4.8% at 438.3p after it said it would at least meet the lower end of full year revenue forecasts of between $1.3bn and $1.5bn after sales fell by 6% in its maritime business.