Stock can refer to:

• Stock is a share of ownership in a company.
• Stock (food) is a soup and flavoring base.
• Inventory is a term for "finished goods", or sometimes raw material kept in storage.
• Stocks a device used for public humiliation, punishment, and torture.
• The stock of a firearm.
• Stock can refer to the base material used in some fabrication work, such as wood for woodworking or the metal used in a welding application.
• To discern between stocks and flows is a core concept of System Dynamics Modelling.
• Stock in geology refers to a medium sized igneous intrusion with outcrop area less than about 100 km².
• Stock is a term for livestock kept on a farm.
• A stock of fish refers to a fish population in a defined area which is of interest to fishery managers.