He said the evidence sessions would take place in September, October and November. If necessary, further sessions will be arranged in December.
Sir Adrian released a report in April following nine weeks of hearings during the first phase of the inquiry at Liverpool Town Hall.
He concluded Rudakubana had “clearly revealed” he was an extreme danger and his attack “could and should have been prevented” if his parents had “done what they morally ought to have done”, or if appropriate arrangements had been put in place by agencies to address his risk.
In his 763-page report, setting out 67 recommendations, Sir Adrian said there was a “fundamental failure” by any organisation, or multi-agency arrangement, to take ownership of the risk posed by the teenager.
Last week, Home Secretary Shabana Mahmood gave the government’s formal response to the inquiry, accepting the report’s recommendations and promising to do “whatever is needed to protect the public”.
She said: “The perpetrator came into contact with the state on countless occasions in the years leading up to the attack.
“Failures in both systems and culture meant multiple opportunities were missed to stop this atrocity.
“That is unacceptable. I am clear that the inquiry must act as a turning point.”
Families of the girls and other survivors said they needed to see more evidence of action and that no-one had lost their jobs over the failures.