| Code | Name | High | Low | Close | Volume | Change |
| YAU | Yamana Gold Inc Com Shs Npv | 800.0 | 778.0 | 780.3 | 9,833 | 10.8 |  | 1.40 |
| YBS | YORKSHIRE BUILDING SOCIETY 5.649% PERM | 65.50 | 62.00 | 65.50 | 0 | 2.00 |  | 3.15 |
| YCI | YANGTZE CHINA INVESTMENT LTD ORD USD0.10 | 0.4850 | 0.4850 | 0.4850 | 0 | 0.0000 |  | 0.00 |
| YCO | YCO GROUP PLC ORD GBP0.0035 | 10.000 | 10.000 | 10.000 | 0 | 0.320 |  | 3.10 |
| YELL | Yell Group | 46.07 | 44.15 | 44.75 | 11,242,596 | 1.25 |  | 2.72 |
| YGH | YINGGAO HOLDINGS PLC ORD GBP0.005 | 1.225 | 1.225 | 1.225 | 0 | 0.000 |  | 0.00 |
| YMBA | | 80.00 | 75.00 | 80.00 | 0 | 5.00 |  | 5.88 |
| YNGA | Young & Co Brews 'a' | 503.0 | 491.2 | 491.2 | 940 | 6.3 |  | 1.27 |
| YNGN | YOUNG & CO'S BREWERY NON.V ORD GBP0.50 | 410.0 | 396.0 | 396.0 | 800 | 9.0 |  | 2.22 |
| YOU | YOUGOV ORD GBP0 | 51.37 | 50.24 | 51.37 | 22,718 | 0.00 |  | 0.00 |
| YSP | Your Space | 26.00 | 20.00 | 23.00 | 0 | 0.00 |  | 0.00 |
| YUJ | YUJIN INTL LTD ORD NPV | 48.00 | 48.00 | 48.00 | 0 | 0.00 |  | 0.00 |
| YULC | Yule Catto | 175.0 | 166.0 | 167.0 | 45,269 | 1.5 |  | 0.89 |