Application through second (and I was told, final) round of interviews, took several months. However, even after numerous rounds of interviews, I simply never heard anything from them. Since the job posting disappeared from the website, I assume they hired someone else. But not hearing that they chose someone else is bad form after multiple rounds of interviews.

Several one-to-one interviews with different managers in legal department and future colleagues. Four rounds total, spanning over several months. Last interview before offer was with the most senior counsel in the group, advising directly Jamie Dimon.