Overstock.com's shares fell 36% in the two days after the statement was made public. Byrne, who founded the online discount retailer 20 years ago, said Thursday that he was "in the sad position" of having to step down.
"Though patriotic Americans are writing me in support, my presence may affect and complicate all manner of business relationships, from insurability to strategic discussions regarding our retail business," he said.
Overstock.com based in Midvale, Utah, named company veteran and board member Jonathan E. Johnson III as interim CEO. The company's shares jumped $1.62, or 8.3%, to close Thursday at $21.12. In his statement last week, Byrne said he had helped law enforcement on three occasions, the last being "less about law enforcement and more about political espionage conducted against Hillary Clinton and Donald Trump (and to a lesser degree, Marco Rubio and Ted Cruz)."