FMS, Delhi has closed there registration portals. Was i suppose to register even if i am waiting for my cat results?

Yes FMS Delhi closes its application form before the CAT results itself and it has not been reopened in last years. Other institutions like MDI Gurgaon have been doing the same.

You can apply for the following top B Schools after the declaration of your CAT results as their forms open after the results.

NITIE MUMBAI
SJMSOM IIT BOMBAY
DMS IIT DELHI
VGSOM IIT KHARAGPUR

OTHER IITs School of Management

All the best!

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Well, FMS, NEW DELHI opens its portal just once and yes you had to fill the form during that period only. If you had a concern regarding your percentile, then your mocks would have been an indicator of what percentile could be anticipated, and looking into that you must have applied for FMS. Anyway, never matter, you still have a good number of colleges in your hand and if you are expecting a really good percentile then all the IIMs are there.
All the best!!