| Bloomsbury Publishing plc | BMY | £5.70 | £465mn |  | 
| Bluefield Solar Income Fund Ltd. | BSIF | £0.81 | £481mn |  | 
| Blue Prism Group Plc | PRSM | £12.74 | £1.2bn |  | 
| B&M European Value Retail S.A. | BME | £1.87 | £1.9bn | FTSE 350 CBOE 250 CBOE 350 STOXX600 | 
| Bodycote Plc | BOY | £6.27 | £1.1bn | FTSE 250 FTSE 350 CBOE 250 CBOE 350 | 
| Boohoo Group Plc | BOO | £0.12 | £168mn |  | 
| Bowleven | BLVN | £0.00 | £5mn |  | 
| B.P.Marsh & Partners | BPM | £6.76 | £244mn |  | 
| BP plc | BP. | £4.42 | £69.6bn | FTSE 100 FTSE 350 FTSE Eurotop 100 S&P Global 100 CBOE 100 CBOE 350 STOXX600 | 
| BP plc | BP.A | £1.51 | £11mn |  | 
| BP plc | BP.B | £1.65 | £9mn |  | 
| Bradda Head Lithium Limited | BHL | £0.01 | £6mn |  | 
| Braemar Plc | BMS | £2.49 | £80mn |  | 
| Brand Architekts Group plc | BAR | £0.48 | £13mn |  | 
| Breedon Group plc. | BREE | £3.50 | £1.2bn |  | 
| Brewin Dolphin Holdings | BRW | £5.15 | £1.6bn | FTSE 350 FTSE 250 CBOE 250 CBOE 350 | 
| Brickability Group Plc | BRCK | £0.56 | £182mn |  | 
| Bridgepoint Group plc | BPT | £3.08 | £2.5bn | FTSE 250 FTSE 350 | 
| Bristol Water Plc | BWRA | £1.41 | £18mn |  | 
| Bristol & West. | BWSA | £1.11 | £87mn |  | 
| British & American Investment Trust plc | BAF | £0.15 | £4mn |  | 
| British American Tobacco Plc | BATS | £39.20 | £85.6bn | FTSE 100 FTSE 350 FTSE Eurotop 100 CBOE 100 CBOE 350 STOXX600 | 
| British Land Co plc | BLND | £3.85 | £3.9bn | FTSE 350 STOXX600 CBOE 100 CBOE 350 FTSE 250 | 
| British Smaller Companies VCT 2 Plc | BSC | £0.51 | £168mn |  | 
| British Smaller Companies Venture Capital Trust plc | BSV | £0.76 | £268mn |  | 
| Britvic | BVIC | £13.13 | £3.3bn | FTSE 350 FTSE 250 CBOE 250 CBOE 350 STOXX600 | 
| Brooks Macdonald Group | BRK | £17.50 | £278mn |  | 
| Brown (N.) Group plc | BWNG | £0.40 | £189mn | CBOE 250 CBOE 350 | 
| Brunner Investment Trust plc | BUT | £14.18 | £613mn |  | 
| BSF Enterprise Plc | BSFA | £0.03 | £4mn |  |