Full details from the SEC over here, but for an easy read and good summary check Python Sweetness, How to lose $172,222 a second for 45 minutes. You could read it as a guide how not to run an automatic trading operation. The fine for inadequate risk procedures was $12m. That’ll teach them.
Getco was the white knight saving them from bankruptcy – the firms completed their merger in July this year. Getco kept their logo but the firms move on under the name KCG Holdings.