A Stock

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