John Manser, who has been a non-executive director of SABMiller for a decade has bought 5,000 shares in the brewer. Manser paid 2083.82p a share for the 5,000 shares, which cost a total of £104,000. He has taken advantage of the weakness in the share price since the beginning of 2011. Organic volumes of lager, which strip out the effects of acquisitions and disposals, rose 3% in the Peroni and Grolsch firm's third quarter. They're up 2% for the first nine months, helped by better economic conditions in many of its emerging markets.Soft drinks volumes grew 5% on an organic basis and were up 3% for the first nine months.Top Director Buys SABMiller (SAB) Director name: Mr John ManserAmount purchased: 5,000 @ 2,083.82p Value: £104,191Artemis Alpha Trust (ATS) Director name: Mr Ian R DigheAmount purchased: 6,325 @ 322.00p Value: £20,366Polar Capital Holdings (POLR) Director name: Mr Hugh AldousAmount purchased: 10,000 @ 143.00p Value: £14,300Nasstar (NASA) Director name: Mr Maurice Anthony EveAmount purchased: 71,724 @ 14.50p Value: £10,400Top Director Sells Imperial Innovations Group (IVO) Director name: Ms Susan SearleAmount sold: 24,012 @ 350.00p Value: £84,042Imperial Innovations Group (IVO) Director name: Mr Julian SmithAmount sold: 18,860 @ 350.00p Value: £66,010City of London Investment Group (CLIG) Director name: Mr Douglas F AllisonAmount sold: 10,000 @ 440.00p Value: £44,000Imperial Innovations Group (IVO) Director name: Dr Martin KnightAmount sold: 8,348 @ 350.00p Value: £29,218