December 22, 2015
Mr. Kevin W. Vaughn
Accounting Branch Chief
United States Securities and Exchange Commission
Washington, D.C. 20549
| RE: | KCG Holdings, Inc. |
| Form 10-K for Fiscal Year Ended December 31, 2014 |
| Filed March 2, 2015 |
| Form 10-Q for Fiscal Quarter Ended September 30, 2015 |
| Filed November 6, 2015 |
| File No. 001-054991 |
| VIA EDGAR |
Dear Mr. Vaughn,
On behalf of KCG Holdings, Inc. (collectively with its subsidiaries, “the “Company”), I would like to formally request an extension of time to respond to the comment letter of the Staff of the Division of Corporation Finance of the Securities and Exchange Commission, dated December 10, 2015 relating to the above mentioned filings (the “comment letter”).
As we discussed earlier today via telephone, the Company would like an extension until January 22, 2016 to respond the comment letter.
Please contact me at if you have any questions or if would like to discuss further. I can be reached at (201) 557-6846 or sgalvin@kcg.com.
Sincerely,
/s/ Sean P. Galvin
Sean P. Galvin
Chief Accounting Officer