A few days ago I put in an order for 14,000 more shares at .84 cents. It too was filled in chunks of hundreds of shares at prices of 83.9--83.8--83.7 It looks to me like computer generated actions getting in front of the bid and each other. Probably flipped it back on the other side at 83.1--83.2 to buy back in front of the .83 offer. It looks to me that the high frequency dudes are having a good go at sgr.