BP was rising high after reaching a settlement with its US counterpart Anadarko over the Deepwater Horizon rig explosion at the Macondo asset in the Gulf of Mexico.Anadarko will pay BP $4bn in a single cash payment, which will go into the $20bn trust fund BP set up to meet individual, business and government claims relating to the tragic incident, as well as the cost of the natural resource damages. Sticking with BP, engineering and project management services (EPMS) firm AMEC has been awarded a £150m contract to provide EPMS for a "giant" Shetland oil field, operated by oil titan BP.The work, which is already underway, is for the main platform design for Clair Ridge, the second phase of the Clair oil field, west of the islands.Security solutions giant G4S dived almost 20% lower after announcing plans to create the world's largest security and facilities services group with the huge £5.2bn purchase of ISS.ISS, headquartered in Copenhagen, Denmark, has more than 520,000 employees and provides Facilities Management, Cleaning, Support, Property, Catering and Securities services. The acquisition is being part-funded by a heavily discounted rights issue.Mining colossus Rio Tinto is firmer after it announced a reorganisation of its Aluminium product group that will include the sale of 13 assets at some point in the future.Shares in insurance group Aviva were also higher, helped by an upgrade by UBS, which raised its rating on the stock from neutral to buy. Schroders was also rising despite a downgrade from UBS from buy to neutral. FTSE 100 - RisersBP (BP.) 435.00p +4.47%Essar Energy (ESSR) 290.50p +3.01%Man Group (EMG) 162.20p +2.92%Amec (AMEC) 882.50p +2.50%Royal Bank of Scotland Group (RBS) 24.78p +2.14%Standard Chartered (STAN) 1,445.50p +1.90%Aviva (AV.) 345.40p +1.89%Hargreaves Lansdown (HL.) 520.00p +1.76%Rio Tinto (RIO) 3,400.50p +1.64%Schroders (Non-Voting) (SDRC) 1,164.00p +1.48%FTSE 100 - FallersG4S (GFS) 227.80p -19.31%Serco Group (SRP) 500.50p -3.00%GKN (GKN) 193.60p -2.02%ITV (ITV) 63.90p -1.62%Shire Plc (SHP) 2,030.00p -1.55%Reed Elsevier (REL) 527.00p -1.50%Ashmore Group (ASHM) 323.60p -1.28%Fresnillo (FRES) 1,639.00p -1.27%Unilever (ULVR) 2,083.00p -1.23%Glencore International (GLEN) 417.45p -1.20%NR