IRR for fund management company

Could you please clarify, if according to GIPS, IRR (internal rate of return) can be provided to investors on Fund management company level, but not on a Fund level.

Let’s say, Fund management company is the one who manages 10 funds. Therefore:

  • Can it provide target return interval on a Fund management company level, for example 10-20% target return as information to investors (it means interval of all its funds under management)

  • Or it can only provide target IRR on a fund level (not on Fund management company level who manages multiple funds)?