The Company had reserved shares of common stock for future issuances as follows:
December 31,
2016
2015
Issuance of equity based awards under stock plan
1,044,113
1,350,543
Issuance upon exercise of options under stock plan
4,452,700
3,240,969
Issuance of restricted stock units under stock plan
502,027
254,067
Total
5,998,840
4,845,579