"Or are you just making this up?"

What a funny retort. Wait, are you just making up the notion that we can "identify" whales moving billions? Do we check the central trade registry and cross reference with billionaires?

Do you know how any of this works? Or are you just making this up?

Unless you're the SEC, this isn't possible. Reporters can't do that, so if you're taking the absence of that evidence as evidence, you are simply ignorant.