GameStop owns nearly 10% of eBay, SEC filing shows

In a second filing also made on Friday, Cohen said "I’m not going to call my shots, but we’re coming for eBay one way or another." That filing transcribed his interview with Bloomberg Television on Thursday.

Two months ago when Cohen first proposed buying the company roughly five times the size of his own, the billionaire investor argued a tie-up between GameStop and eBay, a company that he would run, would be a bigger competitor to Amazon AMZN.O.

EBay in May rejected Cohen's cash and stock offer, calling it "neither credible nor attractive."

Since then Cohen has said in numerous interviews that he will press ahead with his plans. GameStop shareholders last month approved increasing the company's authorized share count which gives GameStop more flexibility to maneuver. Cohen is also putting $500 million of his own money into the transaction.