Maybe they/he bought the rest of the order last week. To buy 200,000 EKA in one order would have an unwanted influence on the SP from a buyers perspective. I speak from experience on the ADI,EKA,AUT swap program. So it may be AUT that they/he/she was swapping for. then again they may have been getting funds to take up the EKA SPP. Who really knows apart from the 100,000 seller.