[caw]

I believe this only applies to a few sections—soda, chips, and magazines(?). Your produce and canned food aisles are stocked by the store employees, though the planograms for the shelving layout comes from corporate, sized for the store’s footprint. There may be some distributor input into those, such as cereal, but I’ve never seen those processes, only the resulting stock plan.

[bombcar]

This also only applies to some stores - not all. You can often tell by the uniform the sticker is wearing.

Smaller stores and chains are often stocked by the store itself, even if Coke delivered the pallet.

[jjulius]

This is correct. In many areas, alcohol is also stocked by distributors. But the rest of the grocery store is stocked by store employees.