Original sentence: The Reebok insider trading case was an insider trading scheme that took place in 2004 and 2005 and involved tips from a Merrill Lynch investment banker, confidential information from Business Week and a grand juror, and trades by individuals in both the United States and Europe
Edited sentence: The Reebok insider trading case was an insider trading ring led by  Eugene Plotkin and David Pajčin that took place in 2004 and 2005 and involved tips from a Merrill Lynch investment banker, confidential information from Business Week and a grand juror, and trades by individuals in both the United States and Europe