Shares in Yule Catto soared into the top spot on the FTSE 250 leader-board after the Essex headquartered polymer business announced it had doubled profits in 2011. Underlying profit before tax at the firm was up 99% to £84.8m in 2011, largely due to its PolymerLatex acquisition in March, which doubled the size of the business. Building products distributor SIG capped a strong year with a 27% jump in profits in 2011, as it benefitted from improved trading conditions. Underlying pre-tax profits came in at the top end of expectations at £81.7m, with earnings per share reaching 9.4p, also a 27% increase on the year before. Bakery and hot snacks retailer Greggs fell after reporting that 2012 got off to a slow start. While sales growth in 2011 was a bit more than the market expected after a strong finish to the year, the profit before tax figure was a tad under-baked. FTSE 250 - RisersYule Catto & Co (YULC) 228.20p +8.67%Ocado Group (OCDO) 119.60p +7.36%Home Retail Group (HOME) 116.70p +6.09%SVG Capital (SVI) 295.90p +6.06%SIG (SHI) 121.00p +4.76%Kenmare Resources (KMR) 52.85p +4.65%Premier Farnell (PFL) 225.10p +4.50%Logica (LOG) 97.25p +3.90%Henderson Group (HGG) 123.40p +3.70%London Stock Exchange Group (LSE) 1,033.00p +3.61%FTSE 250 - FallersPetropavlovsk (POG) 647.00p -2.93%Cable & Wireless Worldwide (CW.) 35.86p -2.74%JD Sports Fashion (JD.) 759.00p -2.69%African Barrick Gold (ABG) 423.80p -2.57%Greggs (GRG) 545.50p -2.24%Savills (SVS) 384.30p -2.19%Ladbrokes (LAD) 158.50p -2.04%Elementis (ELM) 192.20p -1.99%SDL (SDL) 734.50p -1.94%Bwin.party Digital Entertainment (BPTY) 161.50p -1.82%