It has been brought to my attention that I had a wrong expiry date for Stephane Gagnon's options in the POET Timeline. According to POET Technologies' 2015 Stock Option Plan, §6 (o)(ii), options of former company officers remain valid for one year after leaving the company. This is different from the 90 day period for options of employees or consultants, see §6 (o)(i).
This issue is fixed now. Thanks for pointing it out!