our company; my company
Humble expression used when referring to one's own company to an outsider. Used in business contexts.
small company
Refers to a company that is small in scale. Not a humble form; simply descriptive.
He runs a small company.
Refers to a physically small Shinto shrine. Not a humble form.
There is a small shrine at the entrance of the village.
Our company is developing a new product.
Our company is located in Tokyo.
national shrine of minor grade
Compound of 小 (small) and 社 (company/shrine). The humble usage for 'our company' is a conventional extension of the 'small' meaning, downplaying one's own company.