A Stock may refer to: London Underground A Stock (District Railway), London Underground rolling stock built in 1903 London Underground A60 and A62 Stock, a class of sub-surface train run on the London Underground, built in 1960 MTR A-Stock EMU, rolling stock built for MTR's Tung Chung Line and Airport Express Alec Stock (1917-2001), English footballer Class A share, a kind of common stock