Had 2 phone interviews both with 1-2 brainteasers/probability questions but mostly behavioral. Then invited to SIGma day which is their version of super day and had 6 different mini interviews, a case study, and main final interview. In the final interview you discussed the case study you had 30 minutes to prepare using Excel on a computer they provide for you. The 6 mini interviews were rotations to different floors and departments talking to different people on each. Then that night we had a dinner with other finalists, the recruiter, and some analysts.