I don't see how the lawsuit is connected to blackrock. The medium article made that up if you check their source it says nothing about that.
The lawsuit is a class action with a guy who held 10 shares since 2021. Some investors expected the stock to decline in response to the CEO death as the company would make changes and those investors would have maybe even held a short position because of it. But United health intentionally didn't inform investors of it's plans to pay out more for several months. They released official documents knowingly telling investors one plan when internally executives were pivoting. The lawsuit asserts this is a violation of the securities act of 1933 section 10b. This is about United misleading investors.
I'm really looking for the link to blackrock but I don't see it.
People don't really care about the truth they just want to be outraged when their own bias is confirmed.
Doesn't help that articles are lying outright. But you know that's how these shitrags get their ad clicks... Through rage bait.