Tenn. Code Ann. § 48-28-108

Shareholders of a for-profit benefit corporation owning individually or collectively, as of the date of instituting the derivative suit, at least two percent (2%) of the corporation's outstanding shares or, in the case of a corporation with shares listed on a national securities exchange, the lesser of that percentage or shares having at least two million dollars ($2,000,000) in aggregate market value, may maintain a derivative lawsuit to enforce a director's duties set forth in § 48-28-106(a). For purposes of this section, “aggregate market value” means the average of the high and low trading values multiplied by the number of shares issued and outstanding determined as of the last trading day immediately preceding the date of filing the derivative suit.