Stock owned, directly or indirectly, by or for a partnership or estate shall be considered as owned proportionately by its partners or beneficiaries.
If 50 percent or more in value of the stock in a corporation is owned, directly or indirectly, by or for any person, such person shall be considered as owning the stock owned, directly or indirectly, by or for such corporation, in that proportion which the value of the stock which such person so owns bears to the value of all the stock in such corporation.
Stock owned, directly or indirectly, by or for a partner or a beneficiary of an estate shall be considered as owned by the partnership or estate.
If any person has an option to acquire stock, such stock shall be considered as owned by such person. For purposes of this paragraph, an option to acquire such an option, and each one of a series of such options, shall be considered as an option to acquire such stock.
Except as provided in subparagraphs (B) and (C), stock constructively owned by a person by reason of the application of paragraph (1), (2), (3), or (4), shall, for purposes of applying paragraphs (1), (2), (3), and (4), be considered as actually owned by such person.
Stock constructively owned by an individual by reason of the application of paragraph (1) shall not be considered as owned by him for purposes of again applying paragraph (1) in order to make another the constructive owner of such stock.
Stock constructively owned by a partnership, estate, trust, or corporation by reason of the application of paragraph (3) shall not be considered as owned by it for purposes of applying paragraph (2) in order to make another the constructive owner of such stock.
For purposes of this paragraph, if stock may be considered as owned by an individual under paragraph (1) or (4), it shall be considered as owned by him under paragraph (4).