One of the main investors is 1kx capital (some info on what they do : https://www.crowdfundinsider.com/2017/12/126194-40-million-private-placement-ico-aelf-raises-55k-ether-private-token-sale/)
But most of the funds we were able to collect from a bunch of smaller investors, a real community effort. And from looking at the way our whitelist is growing it appears that we will again have to set a low individual cap to make sure everyone has a chance to take part.