December 14, 2011
Via EDGAR and Federal Express
Securities and Exchange Commission
100 F Street, N.E., Mail Stop 4720
Washington, D.C. 20549
Attention: Christian Windsor
| Re: | Wintrust Financial Corporation |
| Form 10-K for the fiscal year ended December 31, 2010 |
| Filed March 1, 2011 |
| Form 10-Q for the period ended June 30, 2011, |
| Filed August 9, 2011 |
| File No. 001-35077 |
Ladies and Gentlemen:
On behalf of Wintrust Financial Corporation, I am writing to request an extension in the time period to respond to your letter dated December 1, 2011. Pursuant to my conversation this morning with the staff, we are requesting an extension until Tuesday, December 20th.
If you have any questions regarding the foregoing, please feel free to contact me directly at (847) 615-4047. My fax number is (877)-873-5406, and my email address is lreategui@wintrust.com.
Sincerely,
/s/ Lisa J. Reategui
Lisa J. Reategui
Executive Vice President,
General Counsel & Corporate Secretary
