Subject: File No. SR-OCC-2015-02
From: John McCarthy

February 27, 2015

KCG Holdings, Inc. ("KCG") is supplementing its comment letter of February 26, 2015 on OCCs capital raising proposal with the following:

In light of the significant issues raised but not addressed by OCCs proposal and subsequent responses to comment letters, KCG respectfully requests that the Commission disapprove the proposal or, at a minimum, that the Commission not approve the proposal via delegated authority but instead refer it for full review and action by the Commissioners.

Sincerely,

John A. McCarthy
General Counsel
KCG Holdings, Inc.