S.C. Code Ann. § 35-2-210 – "Interested shareholder" defined

(a) As used in this article, "interested shareholder", when used in reference to any resident domestic corporation, means any person (other than the resident domestic corporation or any subsidiary of the resident domestic corporation) that is:
1. (1) the beneficial owner (directly or indirectly) of ten percent or more of the voting power of the outstanding voting shares of the resident domestic corporation; or
2. (2) an affiliate or associate of the resident domestic corporation and at any time within the two-year period immediately before the date in question was the beneficial owner (directly or indirectly) of ten percent or more of the voting power of the then outstanding shares of the resident domestic corporation.
(b) For the purpose of determining whether a person is an interested shareholder, the number of voting shares of the resident domestic corporation considered to be outstanding includes shares considered to be beneficially owned by the person through application of Section 35-2-204, but does not include any other unissued shares of voting shares of the resident domestic corporation that may be issuable under any agreement, arrangement, or understanding, or upon exercise of conversion rights, warrants, or options, or otherwise.