17 C.F.R. § 240.13d-3 : Commodity and Securities Exchanges — SECURITIES AND EXCHANGE COMMISSION — GENERAL RULES AND REGULATIONS, SECURITIES EXCHANGE ACT OF 193 — RULES AND REGULATIONS UNDER THE SECURITIES EXCHANGE ACT OF 1934 —G —3 - Determination of beneficial owner

(a) For the purposes of sections 13(d) and 13(g) of the Act a beneficial owner of a security includes any person who, directly or indirectly, through any contract, arrangement, understanding, relationship, or otherwise has or shares:
(1) Voting power which includes the power to vote, or to direct the voting of, such security; and/or,
(2) Investment power which includes the power to dispose, or to direct the disposition of, such security.
(b) Any person who, directly or indirectly, creates or uses a trust, proxy, power of attorney, pooling arrangement or any other contract, arrangement, or device with the purpose of effect of divesting such person of beneficial ownership of a security or preventing the vesting of such beneficial ownership as part of a plan or scheme to evade the reporting requirements of section 13(d) or (g) of the Act shall be deemed for purposes of such sections to be the beneficial owner of such security.
(c) All securities of the same class beneficially owned by a person, regardless of the form which such beneficial ownership takes, shall be aggregated in calculating the number of shares beneficially owned by such person.
(d) Notwithstanding the provisions of paragraphs (a) and (c) of this rule:
(1)
(i) A person shall be deemed to be the beneficial owner of a security, subject to the provisions of paragraph (b) of this rule, if that person has the right to acquire beneficial ownership of such security, as defined in Rule 13d-3(a) (§ 240.13d-3 (a) ) within sixty days, including but not limited to any right to acquire:
(A) Through the exercise of any option, warrant or right; (B) through the conversion of a security; (C) pursuant to the power to revoke a trust, discretionary account, or similar arrangement; or (D) pursuant to the automatic termination of a trust, discretionary account or similar arrangement; provided, however, any person who acquires a security or power specified in paragraphs (d)(1)(i)(A), (B) or (C), of this section, with the purpose or effect of changing or influencing the control of the issuer, or in connection with or as a participant in any transaction having such purpose or effect, immediately upon such acquisition shall be deemed to be the beneficial owner of the securities which may be acquired through the exercise or conversion of such security or power. Any securities not outstanding which are subject to such options, warrants, rights or conversion privileges shall be deemed to be outstanding for the purpose of computing the percentage of outstanding securities of the class owned by such person but shall not be deemed to be outstanding for the purpose of computing the percentage of the class by any other person.
(ii) Paragraph (d)(1)(i) of this section remains applicable for the purpose of determining the obligation to file with respect to the underlying security even though the option, warrant, right or convertible security is of a class of equity security, as defined in § 240.13d-1(i), and may therefore give rise to a separate obligation to file.
(2) A member of a national securities exchange shall not be deemed to be a beneficial owner of securities held directly or indirectly by it on behalf of another person solely because such member is the record holder of such securities and, pursuant to the rules of such exchange, may direct the vote of such securities, without instruction, on other than contested matters or matters that may affect substantially the rights or privileges of the holders of the securities to be voted, but is otherwise precluded by the rules of such exchange from voting without instruction.
(3) A person who in the ordinary course of his business is a pledgee of securities under a written pledge agreement shall not be deemed to be the beneficial owner of such pledged securities until the pledgee has taken all formal steps necessary which are required to declare a default and determines that the power to vote or to direct the vote or to dispose or to direct the disposition of such pledged securities will be exercised, provided, that:
(i) The pledgee agreement is bona fide and was not entered into with the purpose nor with the effect of changing or influencing the control of the issuer, nor in connection with any transaction having such purpose or effect, including any transaction subject to Rule 13d-3(b);
(ii) The pledgee is a person specified in Rule 13d-1(b)(ii), including persons meeting the conditions set forth in paragraph (G) thereof; and
(iii) The pledgee agreement, prior to default, does not grant to the pledgee;
(A) The power to vote or to direct the vote of the pledged securities; or
(B) The power to dispose or direct the disposition of the pledged securities, other than the grant of such power(s) pursuant to a pledge agreement under which credit is extended subject to regulation T ( 12 CFR 220.1 to 220.8 ) and in which the pledgee is a broker or dealer registered under section 15 of the act.
(4) A person engaged in business as an underwriter of securities who acquires securities through his participation in good faith in a firm commitment underwriting registered under the Securities Act of 1933 shall not be deemed to be the beneficial owner of such securities until the expiration of forty days after the date of such acquisition.

17 C.F.R. §240.13d-3

Secs. 3(b), 13(d)(1), 13(d)(2), 13(d)(5), 13(d)(6), 14(d)(1), 23; 48 Stat. 882, 894, 895, 901; sec. 203(a), 49 Stat. 704, sec. 8, 49 Stat. 1379; sec. 10, 78 Stat. 88a; secs. 2, 3, 82 Stat. 454, 455; secs. 1, 2, 3-5, 84 Stat. 1497; secs. 3, 18, 89 Stat. 97, 155 ( 15 U.S.C. 78c(b), 78m(d)(1), 89m(d)(2), 78m(d)(5), 78m(d)(6), 78n(d)(1), 78w

43 FR 18495, Apr. 28, 1978, as amended at 43 FR 29768, July 11, 1978; 63 FR 2867, 1/16/1998