Police say on June 27, a male suspect entered the bank, located at Spadina Avenue and Dudas Street, wearing a mask and hood and pulled out a knife.
He then allegedly jumped over the counter, approached an employee and demanded cash.
That employee took cash out of his wallet and offered it to the suspect, police say.
The suspect took the cash but then allegedly stabbed the clerk multiple times.
The employee was then rushed to hospital with serious but non-life threatening injuries.
Police say the suspect, meanwhile, fled the bank through an emergency exit at the rear of the premises.
On Tuesday, police identified the suspect as 43-year-old Mark Webster.
He is wanted for 13 offenses including robbery with an offensive weapon, assault occasioning bodily harm and impersonation with intent.
Investigators say he should not be approached and anyone who spots him should call 911 immediately.