The incident in question occurred in May, but came to public attention this week when police released CCTV footage that shows a jogger on Putney Bridge pushing a woman into traffic, and a bus swerving to avoid her as she falls.
Mr Bellquist, a top boss at the Wagamama and Byron restaurant chains, says he has "irrefutable proof" he was in the U.S. at the time of the incident, which took place at 7.40am on May 5.
Officers have also renewed an appeal for witnesses to the random attack that has caused shock across the UK. "Consequently we expect a swift resolution to this wholly untrue allegation", Duncan Lewis Solicitors said in a statement.
An investment banker and reported Southern California native says he's not the suspect who was caught on camera pushing a woman into the path of a London bus. The partner who works for Hutton Collins Partners denies that he had anything to do with it.
Police released CCTV footage this week showing the female pedestrian being pushed in front of the 430 bus by a male jogger at about 7.40am.
Cops said the jogger ran the other way across the bridge around 15 minutes later and the victim attempted to speak to him, but "he did not acknowledge her".
After the bus ground to a halt, passengers assisted the victim, who received minor injuries. He was wearing a light grey t-shirt and dark blue shorts.