Stocker

noun

1. Livestock that is wintered and then sold in the spring; often contrasted with a feeder when the focus is on intended disposition.

   "Will you keep those calves as feeders or only as stockers?"

2. A racecar in certain classes of auto racing whose origins are nominally or notionally related to factory-stock autos, such as stock car racing or super-stock drag racing.
3. One who crafts gun stocks
4. One who stocks shelves with inventory
5. One who supplies raw material to a machine