26 U.S.C. § 1563
Definitions and special rules
Two or more corporations if 5 or fewer persons who are individuals, estates, or trusts own (within the meaning of subsection (d)(2)) stock possessing more than 50 percent of the total combined voting power of all classes of stock entitled to vote or more than 50 percent of the total value of shares of all classes of stock of each corporation, taking into account the stock ownership of each such person only to the extent such stock ownership is identical with respect to each such corporation.
Two or more insurance companies subject to taxation under section 801 which are members of a controlled group of corporations described in paragraph (1), (2), or (3). Such insurance companies shall be treated as a controlled group of corporations separate from any other corporations which are members of the controlled group of corporations described in paragraph (1), (2), or (3).
If a corporation is a component member of more than one controlled group of corporations with respect to any taxable year, such corporation shall be treated as a component member of only one controlled group. The determination as to the group of which such corporation is a component member shall be made under regulations prescribed by the Secretary which are consistent with the purposes of this part.
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.
Stock owned, directly or indirectly, by or for a partnership shall be considered as owned by any partner having an interest of 5 percent or more in either the capital or profits of the partnership in proportion to his interest in capital or profits, whichever such proportion is the greater.
Stock owned, directly or indirectly, by or for a corporation shall be considered as owned by any person who owns (within the meaning of subsection (d)) 5 percent or more in value of its stock 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.
An individual shall be considered as owning stock owned, directly or indirectly, by or for his children who have not attained the age of 21 years, and, if the individual has not attained the age of 21 years, the stock owned, directly or indirectly, by or for his parents.
An individual who owns (within the meaning of subsection (d)(2), but without regard to this subparagraph) more than 50 percent of the total combined voting power of all classes of stock entitled to vote or more than 50 percent of the total value of shares of all classes of stock in a corporation shall be considered as owning the stock in such corporation owned, directly or indirectly, by or for his parents, grandparents, grandchildren, and children who have attained the age of 21 years.
For purposes of this section, a legally adopted child of an individual shall be treated as a child of such individual by blood.
For purposes of this section the term “employee” has the same meaning such term is given by paragraphs (1) and (2) of section 3121(d).
Except as provided in subparagraph (B), stock constructively owned by a person by reason of the application of paragraph (1), (2), (3), (4), (5), or (6) of subsection (e) shall, for purposes of applying such paragraphs, be treated as actually owned by such person.
Stock constructively owned by an individual by reason of the application of paragraph (5) or (6) of subsection (e) shall not be treated as owned by him for purposes of again applying such paragraphs in order to make another the constructive owner of such stock.
Except as specifically provided in an applicable provision, subsection (a)(2) shall be applied to an applicable provision as if it read as follows:
For purposes of this paragraph, an applicable provision is any provision of law (other than this part) which incorporates the definition of controlled group of corporations under subsection (a).
2004—Subsec. (a)(2). Pub. L. 108–357, § 900(a), substituted “possessing” for “possessing—”, struck out “(B)” before “more than 50 percent of the total combined voting power”, and struck out subpar. (A) which read as follows: “at least 80 percent of the total combined voting power of all classes of stock entitled to vote or at least 80 percent of the total value of shares of all classes of the stock of each corporation, and”.
Subsec. (f)(5). Pub. L. 108–357, § 900(b), added par. (5).
1988—Subsec. (d)(1)(B). Pub. L. 100–647 substituted “paragraphs (1), (2), and (3) of subsection (e)” for “subsection (e)(1)”.
1986—Subsec. (b)(2)(D). Pub. L. 99–514 struck out “or section 821” after “section 801”.
1984—Subsecs. (a)(4), (b)(2)(D). Pub. L. 98–369 substituted “section 801” for “section 802”.
1976—Subsecs. (b)(4), (f)(3)(B). Pub. L. 94–455 struck out “or his delegate” after “Secretary”.
1970—Subsec. (f)(1). Pub. L. 91–373 substituted “by paragraphs (1) and (2) of section 2131(d)” for “in section 3306(i)”.
1969—Subsec. (a)(2). Pub. L. 91–172, § 401(c), redesignated existing provisions with minor changes as par. (A) and added par. (B).
Subsec. (c)(2)(A)(iv). Pub. L. 91–172, § 401(d)(1), added cl. (iv).
Subsec. (c)(2)(B). Pub. L. 91–172, § 401(d)(2), substituted “5 or fewer persons who are individuals, estates, or trusts (referred to in this subparagraph as ‘common owners’) own” for “a person who is an individual, estate, or trust (referred to in this paragraph as ‘common owner’) owns” and in cl. (ii), substituted “any of such common owners”, “any of the common owners” for “such common owner” and “the common owner”, respectively and added cl. (iii).
Pub. L. 108–357, title VIII, § 900(c),
Pub. L. 100–647, title I, § 1018(s)(3)(B),
Amendment by Pub. L. 99–514 applicable to taxable years beginning after
Amendment by Pub. L. 98–369 applicable to taxable years beginning after
Amendment by Pub. L. 91–172 applicable with respect to taxable years ending on or after
Section applicable with respect to taxable years ending after