Halma £2.20 (2009) -> £20 (2020) plus dividends WH Smith £3.50(2009) -> £16 (2020) plus huge dividends Scottish Mortgage £1.40 (2009) -> £5.70 (2020) plus dividends Avon Rubber 39p (2009) -> £26 (2020) plus dividends GKN 40p (2009) -> £4.80 when bought by Melrose PRU £2.00 (2009) -> £20 (2018) but now split into PRU and M&G Greggs £4 (2013) -> £20 (2020)
Last years stars were 3I and Aveva
Aveva £8 (2009) -> £52 (2020) plus dividends, plus £10/share extra payment from Schneider SA when they merged in 2018.
But on the downside, the noughties was a bad time to hold banks and supermarkets, while Oil company share prices are dictated by the £/$ exchange rate, and the oil price which is determined by regular skirmishes between Russia, USA and Saudi (plus the state of the world economy).