For the twelve months ended December 31, 2013, the Company granted 5,818,439 common stock warrants, which had the potential to enhance returns for accredited investors who entered into additional Notes, Warrant Purchase Agreements, and equity offering agreements as well as provide incentives to certain employees and board members. The accredited investors received 2 to 10 year warrants exercisable between $0.001 and $0.50 per share in the equity offering agreements as part of debt or fees payment agreements. Employee and board members were offered common stock warrants with an exercise price of $0.40 per share during the twelve months ended December 31, 2013.
For the twelve months ended December 31, 2013, Note investors exercised 2,638,636 warrant shares at an exercise price of $0.001 to $0.12 per share.
For the twelve months ended December 31, 2013, 33,334 Series A Preferred stock warrants and 255,668 common stock warrants expired, both classes of warrant shares having a weighted average exercise price of $1.50 and $0.12 per share respectively.
A summary of historical warrant activity for the years ended December 31, 2013 and 2012 follows:
| Warrants Outstanding & Exercisable | Weighted - Average Exercise Price | Average Remaining Term in Years | ||||||||||
| Outstanding December 31, 2011 | 1,428,590 | 0.35 | 4.08 | |||||||||
| Granted | 1,816,000 | 0.001 | - | |||||||||
| Exercised | (1,432,667 | ) | 0.001 | - | ||||||||
| Expired | (5,000 | ) | 3.00 | - | ||||||||
| Outstanding December 31, 2012 | 1,806,923 | $ | 0.27 | 2.67 | ||||||||
| Granted | 5,818,439 | 0.26 | - | |||||||||
| Exercised | (2,638,636 | ) | 0.01 | - | ||||||||
| Expired | (289,002 | ) | 1.18 | - | ||||||||
| Outstanding December 31, 2013 | 4,697,724 | 0.34 | 4.85 | |||||||||