Kate Claassen's name also fits, and she has a work background at Merrill Lynch (as does Birchall), but unlike Corcoran, she still appears to be employed at Morgan Stanley.
Just a guess... But it appears that Kyle Corcoran is the Morgan Stanley Managing Director who helped Elon Musk manipulate the market to amass his Twitter stake.
The name lines up.
And so does the timing. It looks like Morgan Stanley likely fired him in 2023 when this came up in discovery.
Kate Claassen's name also fits, and she has a work background at Merrill Lynch (as does Birchall), but unlike Corcoran, she still appears to be employed at Morgan Stanley.