Ohio Rev. Code Ann. § 1701.85
(A)
(3) Not later than twenty days before the date of the meeting at which the proposal will be submitted to the shareholders, the corporation may notify the corporation's shareholders that relief under this section is available. The notice shall include or be accompanied by all of the following:
(C)
(1) If the proposal was required to be submitted to the shareholders of the corporation, fair cash value as to those shareholders shall be determined as of the day prior to the day on which the vote by the shareholders was taken and, in the case of a merger pursuant to section 1701.80 or 1701.801 of the Revised Code, fair cash value as to shareholders of a constituent subsidiary corporation shall be determined as of the day before the adoption of the agreement of merger by the directors of the particular subsidiary corporation. The fair cash value of a share for the purposes of this section is the amount that a willing seller who is under no compulsion to sell would be willing to accept and that a willing buyer who is under no compulsion to purchase would be willing to pay, but in no event shall the fair cash value of a share exceed the amount specified in the demand of the particular shareholder. In computing fair cash value, both of the following shall be excluded:
(2) For the purposes of this section, the fair cash value of a share that was listed on a national securities exchange at any of the following times shall be the closing sale price on the national securities exchange as of the applicable date provided in division (C)(1) of this section:
(D)
(1) The right and obligation of a dissenting shareholder to receive fair cash value and to sell such shares as to which the dissenting shareholder seeks relief, and the right and obligation of the corporation to purchase such shares and to pay the fair cash value of them terminates if any of the following applies: