Roughly 4 rounds...
1) Had to take a personality test and a cognitive aptitude test.
2) Informed they'd like to continue, and scheduled an interview with HR.
3) Informed they'd like to continue on, and scheduled an interview with the VP of Product Marketing.
4) Informed me they'd like to continue on and I was given 5 days to complete a case study. After which, we scheduled a meeting for me to present it to the Product Marketing team. Presentation was about a half hour, Q&A another half hour.
It took them about a week to get back to me after the case study to inform me I didn't get the position.
About 4 weeks in total. Not a bad experience, but with the amount of time spent getting involved in the company's products and messaging, it was pretty frustrating to not get the offer.