4. Equity

3 Months Ended

Mar. 31, 2016

Equity [Abstract]

Equity

For the three months ended March 31, 2016, equity related transactions were as follows:

On March 14, 2016, Opexa entered into an amendment to the September 1, 2015 Stock Purchase Agreement with the purchasers party thereto, to extend by six months the original dates for the milestones relating to the subsequent tranches.  As part of the amendment, the expiration date of the Series N warrants issued pursuant to the Stock Purchase Agreement was also extended from April 9, 2018 to October 9, 2018.  The Company determined that there is no accounting impact to the modification of the Series N warrants since these are investor warrants.