Spouse and children younger than 18 can obtain family visas. Your parents can obtain family visas only if you are the only son and you prove that they are financially dependent on you or they are seriously impaired (and their inability is proved by medical certificates).
Who is considered family for an Italian investor visa?
I am an investor from Asia who is interested in immigrating to Italy by investing in a scientific research endeavor. I have a large family of parents, in-laws, children and some siblings. We share the same household. Who is eligible to immigrate with me?
According to the most, you can consider as family your wife, sons and parents, whereas it would be difficult to persuade the Italian government to accept siblings and in-laws as part of the family under the investor visa point of view (even though a possible solution could be you to hire them through your enterprise).
According to the law, the investor may bring with him the spouse and all underage children. As for the adult children and the parents of the investor (father or mother), the investor is requested to provide evidence that they cannot provide for themselves in their own country or they are ill and need medical treatment to be allowed to bring them in Italy as well.
Family members of an investor visa holder may apply for and obtain a resident permit for family reasons. In particular, under Italian immigration law, family members are considered: (i) spouses, (ii) children under the age of 18, (iii) children over the age of 18 if they are not able to support themselves due to a total disability, (iv) parents not able to support themselves and not having any other child in their country of origin as well as parents over the age of 65 having other children in the country of origin who cannot support them for health reasons.