4 rounds, which took months. 1st round Screening with HR, 2nd round Talking with a Consultant, 3rd round 3 interviews with high-level people at the company. The final Interview is with a partner, which I didn't get to.

First was a screening interview with HR, then a case with associate, writing assignment, and finally one round that is three cases. Did not make it to final culture fit interview. Cases were easy, they just care a lot about wording and your clarity.