Notice of Completion of Staff Review of Proposed Changes - New DAO Order Designations, Elimination of All or None Order, and Changes to Mixed Lot Order Handling - Alpha ATS LP

Alpha ATS LP (Alpha ATS) had previously announced its plans to implement changes to its Form 21-101F2 that would provide for new Directed Action Order designations, eliminate the All or Non order type, and alter the handling of mixed lot orders.

A notice describing the proposed changes was published in accordance with OSC Staff Notice 21-703 - Transparency of the Operations of Stock Exchanges and Alternative Trading Systems on September 23, 2011 in the OSC Bulletin. Pursuant to OSC Staff Notice 21-703, market participants were also invited by OSC staff to provide the Commission with feedback on the proposed changes. No comment letters were received.

OSC staff have completed their review of the proposed changes and have no further comment. Alpha ATS is expected to publish a notice indicating the intended implementation date of the proposed changes.