Shares in ARM Holdings are going well after market share gains and growing demand for smartphones kept the chip designer ahead of its rivals at the end of 2009, though sales and profits were still lower in the quarter.Engineering support services group Babcock is higher after saying it remains on track for 'another year of excellent progress'.Water group Pennon falls back a little after spurting ahead yesterday in line with the broader sector amid bid speculation over peer Northumbrian Water.FTSE 250 - RisersMarston's (MARS) 90.10p +4.95%Dimension Data Holdings (DDT) 81.55p +4.42%BBA Aviation (BBA) 174.20p +4.25%Petropavlovsk (POG) 962.50p +4.22%ARM Holdings (ARM) 197.80p +4.21%St. Modwen Properties (SMP) 197.70p +3.67%Babcock International Group (BAB) 581.00p +3.66%Enterprise Inns (ETI) 125.60p +3.46%Morgan Crucible (MGCR) 168.80p +3.37%Ferrexpo (FXPO) 212.00p +3.31%FTSE 250 - FallersPV Crystalox Solar (PVCS) 53.40p -3.09%Shanks Group (SKS) 123.00p -3.07%Evolution Group (EVG) 121.20p -2.65%Ecofin Water & Power Opportunities (ECWO) 137.50p -2.48%Rathbone Brothers (RAT) 804.00p -1.59%JPMorgan Asian Inv Trust (JAI) 176.20p -1.45%Pennon Group (PNN) 532.50p -1.39%Dexion Absolute GBP Shares (DAB) 145.70p -1.22%Britvic (BVIC) 421.00p -1.20%Dechra Pharmaceuticals (DPH) 499.10p -1.17%