I have three sets of warrants. The oldest expire in October 2018. That was a raise that was oversubscribed at .65 and 50% warrants at .75. I believe there was approximately 7.5 million warrants on that raise.
I have not tracked when they all expire, just when granted. I'm guessing those 2013 warrants are about to expire.
Options and warrants: 74M outstanding May 2017 May 2012 - May 2013 Granted 11M @ 1.61 average May 2013 - May 2014 Granted 18M @ 0.74 average May 2014 - May 2015 Granted 9 M @ 0.93 average May 2015 - May 2016 Granted 33M @ 0.83 average May 2016 - May 2017 Granted 16M @ 0.99 average