The relatively brief stock market history of Aegis is set to come to an end with the media and digital communications group agreeing to a takeover by Japanese advertising agency Dentsu. Dentsu is offering 240p in cash for each Aegis share, almost half as much again as the shares were trading at in London on the day before the agreed bid announced. The offer terms value the whole of Aegis at around £3.16bn. Reinforced polymer technology firm Fenner rose into the top spot at it reported 'solid progress' since March 1st, having generated revenue and earnings in line with expectations. As a result, the company remained confident of meeting its full expectations for the year. Shares of oil and gas firm Premier Oil rose after it announced that it is buying a majority stake in Rockhopper Exploration's licence in the Falkland Islands. Premier is paying $231m for a 60% stake in Rockhopper's North Falkland Basin licences. FTSE 250 - RisersAegis Group (AGS) 235.60p +45.25%Melrose (MRO) 379.80p +7.08%Cable & Wireless Communications (CWC) 31.53p +3.82%Daejan Holdings (DJAN) 2,885.00p +2.63%Barratt Developments (BDEV) 136.20p +2.41%Go-Ahead Group (GOG) 1,256.00p +2.36%Informa (INF) 379.70p +2.26%Premier Oil (PMO) 366.40p +2.12%Computacenter (CCC) 311.00p +1.97%Taylor Wimpey (TW.) 46.31p +1.76%FTSE 250 - FallersFenner (FENR) 349.30p -6.68%Aquarius Platinum Ltd. (AQP) 40.12p -4.57%Bodycote (BOY) 311.70p -4.21%Hays (HAS) 67.75p -3.97%Petropavlovsk (POG) 422.60p -3.54%Gem Diamonds Ltd. (DI) (GEMD) 217.00p -3.12%Avocet Mining (AVM) 65.00p -2.99%Victrex (VCT) 1,199.00p -2.92%CSR (CSR) 224.60p -2.85%BlackRock World Mining Trust (BRWM) 558.00p -2.79%NR