Found it! In the 3B published on the 13th of October, there were...

Found it!

In the 3B published on the 13th of October, there were 5,780,780 shares issued for:

780,780 shares issued for $0.0273 per share upon the exercise of 780,780 unlisted options with an exercise price of $0.0273 per share and expiry date of 25 January 2020
and;
5,000,000 shares issued for $0.075 per share upon the exercise of 5,000,000 unlisted options with an exercise price of $0.075 per share and expiry date of 21 June 2019

Neither of these were Arena's options as neither the conversion price or the expiry dates match the options we issued to them