@Nighthawk said "The fund is based in Europe - in Luxemburg to be precise."
There's your answer.
Most international firms, but in particular EU firms won't touch US money with a bargepole.
You'll find they won't take on new clients, and any existing clients who are not worth the hassle (i.e. not bringing the business) will simply be told (if they haven't already been) to go back where they came from.
Why ?
Not because of EU regulations. But because of the archeic worldwide taxation policy of the US and the ensuing archaeic rules imposed on foreign financial firms and additionally archeic financial penalties if they fail to follow any part of the rules.
The US and Eritrea are the only two countries in the world that tax people based on their citizenship.
EU firms have more than enough regulatory burden as it on their home-turf is without having to deal with a whole lot more coming from the yanks, which in the case of the taxation stuff is a whole load of un-necessary drivel that does nothing except take up time and money and generate reams of pointless paperwork.