This is the 5024th most frequent Korean word.
기업들을
"기업들을" means "companies" or "businesses" (plural, accusative marker).
기업들을 here is used as the object of the verb '지원하다' (to support), showing the direct objects being affected.
많은 기업들을 지원하는 정책이 필요합니다.
Policies supporting many companies are necessary.
기업들을 functions as the object being targeted by the action '대상으로 세금 혜택을 제공하다' (to provide tax benefits targeting).
정부는 신생 기업들을 대상으로 세금 혜택을 제공합니다.
The government provides tax benefits targeting start-up companies.
기업들을 acts as the object included by '포함하다' (to include), indicating the direct participants.