The singular is company. The possessive form is company's (referring to one company).
The plural is companies. The plural possessive is companies' (referring to more than one company).
When you spell company it is always with a (y) so for your question the first option is correct
The correct spelling is "company"
The plural form of the noun company is spelled companies.
That is correct. Company is the singular noun, and company's is the singular possessive.
That is the correct spelling of "among" (with, in company with).
The correct spelling is business (commerce, or a company).
That is the correct spelling of the video game company Nintendo.
The correct spelling is "business" (commerce, or a company).
That is the correct spelling of "oracle" (seer). The company name Oracle is capitalized.
That is the correct spelling of the Swedish furnishings company IKEA. (all capitals)
The likely word is "business" (commerce, or a company).
That is the correct spelling Petrotrin of the state-owned oil company in Trinidad and Tobago.