8-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of
The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)
September 28, 2006

ENTERPRISE FINANCIAL SERVICES CORP
(Exact name of registrant as specified in its charter)
Delaware	001-15373	43-1706259
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)
150 N. Meramec, St. Louis, Missouri		63105
(Address of principal executive offices)		(Zip Code)
Registrant’s telephone number, including area code
(314) 725-5500
Not applicable
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers.

          (b)          On September 28, 2006, Richard S. Masinton informed Enterprise Financial Services Corp (the “Company”) that he does not intend to stand for re-election to the Company’s Board of Directors. Mr. Masinton currently serves on the Company’s Audit Committee and is expected to continue to serve as a Director and member of the Audit Committee until the Company’s 2007 annual meeting of stockholders.

Item 9.01 Financial Statements and Exhibits

         99.1         Press Release of the Company dated September 28, 2006.

2

SIGNATURE

          Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated:  September 28, 2006
	ENTERPRISE FINANCIAL SERVICES CORP
	By:	/s/ Kevin C. Eichner
		Kevin C. Eichner
		Chief Executive Officer

3

Exhibit Index

Exhibit No.	Description
99.1	Press Release of the Company dated September 28, 2006

4

EX-99.1

Exhibit 99.1

FOR IMMEDIATE RELEASE

For more information, contact:
Kevin Eichner (314) 725 5500
Frank Sanfilippo (314) 725 5500
Ann Marie Mayuga (314) 469 4798 or (314)477 4090

RICHARD S. MASINTON TO RETIRE FROM EFSC BOARD OF DIRECTORS

St. Louis, September 28, 2006 – Enterprise Financial Services Corp (NASDAQ:  EFSC), the parent company of Enterprise Bank & Trust, announced today the intent of its director, Richard S. Masinton, to retire from its board, effective April 18, 2007.  Masinton has served on the Enterprise Board since 2000 and was previously a board member of Commercial Guaranty Bancshares, Inc., which was acquired by EFSC in June 2000.  Masinton has served as head of EFSC’s Audit Committee until recently, when he was succeeded by Sandra Van Trease in that capacity.

“Dick has been a very productive and faithful board member throughout his term.  He gave exceptional leadership to our Audit Committee during a time when all public companies were being challenged to enhance their oversight and governance.  The Enterprise shareholders owe Dick a real debt of gratitude for his excellent service,” said Kevin Eichner, President and CEO.

“While we are only half way through the year, I thought it appropriate to give Enterprise’s Nominating & Governance Committee sufficient time to consider all options in presenting the best possible slate of board candidates for our shareholders well in advance of the annual election.  I have enjoyed my service with Enterprise and look forward to being involved with the company as a shareholder and client for many years in the future,” said Masinton.

James Murphy, Lead Director of the EFSC board, and Peter Benoist, Chairman,  indicated that the Nominating & Governance Committee is accepting Masinton’s retirement with gratitude for his service and has begun a search for a suitable replacement.  Lewis Levey as the Chairman of the EFSC’s Nominating & Governance Committee will lead the search effort.

Enterprise Financial operates commercial banking and wealth management businesses in metropolitan St. Louis and Kansas City, with a primary focus on serving the needs of privately held businesses, their owners and other success-minded individuals.  The Company’s stock is listed nationally on NASDAQ under the symbol EFSC.

###