Despite reporting a £303m interim loss, Melrose Industries is leading the FTSE 100 risers at midday.
The company, which succeeded in buying engineering firm GKN earlier this year for £8.1bn, saw its share price rise by 5.52% to £234.95.
Melrose said the loss was due to "significant acquisition related charges" but chief executive Christopher Miller said: "Plans have been agreed and are now being implemented to realise the full potential of GKN's world-leading, but currently under-developed, businesses."
British Gas-owner Centrica remained as a major blue chip riser - up 5.23% to 150.9p - after Ofgem announced a price cap on household energy bills.
The FTSE 100 is down 0.24% at 7,365.43.
Thameslink-owner Go-Ahead is the FTSE 250's biggest riser, up 6.6% at £17.45 after reporting better than expected full-year profits.
Sirius Minerals, which is seeking additional funding for its North Yorkshire potash mine, is down 10.4% at 29.17p.
The FTSE 250 is down 0.22% at 20,344.38.