Thursday broker round-up

ARM Holdings: Credit Suisse upgrades to outperform with a target of 1,300p.Admiral Group: Citi downgrades to sell with 1,335p target.Antofagasta: Stifel initiates at hold.Bellway: Jefferies upgrades to buy and raises target to 2,997p from 2,542p.LSE Group: RBS upgrades to outperform.Petrofac: Nomura ups view to buy and lifts target to 1,130p from 765p.Royal Dutch Shell: Credit Suisse reiterates outperform.Sage: Citi upgrades recommendation to buy, Investec stays at hold and Exane keeps at underperform.WPP: Citi reiterates neutral stance and 1,560p target price. Admiral Sage Group Bellway Antofagasta WPP