What are/ who controls these rich wallets? "Post-V1 Fund - 400 - Fund stakes" and "Pre-V1 Fund - 250 - Fund stakes"

It seems like there is over 16% of all NEM in these 2 wallets, who controls these wallets and what are they for?

See
http://blockexplore.in/search/richlist/#

It’s wallets ranked #1 and #3


Edit, also, what about the 2nd biggest wallet, titled "NEM Sustainable Ecosystem Loop Fund (NEMSELF) - - Dev-Fund "
Who controls this? (This one holds about 10% of all NEM as well)

Please help understanding this, thank you in advance

take a look at this:

development contract

these are under multi-sig control, so no 1 person controls these wallets…

As the name says, those are funds. They will be used to pay developers that develop NEM. V1 stands for version 1 which is described in the developer contract.