The telecoms giant enjoyed favourable media mentions over its Iraq contract win and the blocking of an attempt to convert French wireless network SFR into a limited partnership.
General Dynamics gained the top spot, pushing Tesco into second place. The defence firm, which was ranked at 689 last week , achieved the leap after its £309m bid for Alvis, the UK armoured vehicle manufacturer.
EasyJet jumped from ninth to third spot after successfully highlighting its travel routes on the back of Aer Lingus’s results.
John Lewis Partnership came fifth after announcing a pre-tax profit rise of 19 per cent.
Shell was the fifth worst performer due to coverage surrounding a Financial Services Authority investigation into an alleged breach of stock market rules.
Royal & SunAlliance plummeted from 420th from bottom last week to third from bottom this week due to coverage of a 38 per cent profit slide.
Elsewhere, Equitable Life continued to prop up the table as the worst performer after ongoing negative coverage of the Penrose report into the firm’s guaranteed annuity policy debacle.
The reputation monitor is compiled from Thomson Intermedia’s National News Index (NNI), a measure of media sentiment excluding stock market reports and passing mentions.