It depends on which City.
In City of Toronto, police will send a copy of the report to insurance companies of both parties, even though they both settled themselves, their insurance companies will still use the report to ADJUST car insurance.
In City of Markham (York Region), police won't send reports to insurance companies. I think, as according to what LZ has said, it seems that Ottawa police won't send copy of that incident to insurance companies, but I am not sure whether this is the case. I never have any car collision accidents (rear-ended or being rear ended) since I have my driver license. I learnt the practice of Toronto and Markham police from friends. LZ better find out practise of Ottawa police.