Correct. This is a service provided by the TSX.

From thier website:

http://www.tsx.com/tsx-company-services/understanding-your-stock-s-trading-activity/anonymous-activity

As a listed company, you can add a subscription to your TSX InfoSuite account to access two additional reports:

• Anonymous Broker Summary provides an account of only the anonymous trades conducted by each broker firm in the previous month.
• Enhanced Broker Summary provides a fully attributed recap of the previous month's house trading summary sorted by broker, and is an accurate depiction of the broker's overall trading activity.