The UK stock market is the London Stock Exchange (£2.5 tn), home to 2,000+ companies split into the FTSE 100 giants (80% of value), FTSE 250 mid-caps, SmallCap firms and 750 AIM growth stocks. Daily turnover: £6–8 bn, mostly owned by foreign funds (55%), UK pensions (15%) and retail investors (12%). The market is heavily weighted toward energy, finance, and consumer goods, with fewer tech companies compared to the US, and many listed firms earn much of their revenue overseas.