Onboarding Friction: KYC/AML for a Mid-Sized Prop Trading Desk

Running into consistent headwinds recently with KYC/AML during new broker onboarding, particularly with a prop trading desk structure. We're not a hedge fund, not a small retail account, but seem to fall into a gray area that triggers excessive documentation requests and protracted review times. It's impacting our ability to diversify liquidity providers and integrate new execution venues efficiently.

Specifically, the common sticking points are proving beneficial ownership through multiple layers of corporate entities, even with clear organizational charts and certified articles. Some providers seem to lack the internal frameworks to process anything beyond straightforward single-entity or institutional setups without significant manual intervention and back-and-forth. This isn't just about speed; it's about the opportunity cost of having capital tied up or under-utilized while compliance teams deliberate. Has anyone found a particular type of broker or PSP that handles this intermediate-sized prop desk structure more smoothly, perhaps with a more streamlined digital onboarding process that anticipates these complexities?