Top JPMorgan rainmaker Matthew Demko jumps ship from Jamie Dimon-led bank

“Hurricane Jamie” lost one of his rainmakers.JPMorgan managing director Matthew Demko quit the Jamie Dimon-led bank to join Ryan Specialty Group, an insurance broker and underwriter founded by billionaire Patrick G. Ryan, The Post has learned.The investment banker’s last day of employment with the US financial giant was Monday, according to his broker profile posted on the website of US regulator FINRA, but it is yet to updated with his new job. 3 Jamie Demko, 42, has been with JPMorgan for his entire car ...