<SUBMISSION>
<ACCESSION-NUMBER>0001206774-08-002070
<TYPE>8-K/A
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20081219
<ITEMS>1.01
<ITEMS>3.02
<ITEMS>3.03
<ITEMS>5.02
<ITEMS>5.03
<ITEMS>9.01
<FILING-DATE>20081223
<DATE-OF-FILING-DATE-CHANGE>20081223
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>ENTERPRISE FINANCIAL SERVICES CORP
<CIK>0001025835
<ASSIGNED-SIC>6022
<IRS-NUMBER>431706259
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K/A
<ACT>34
<FILE-NUMBER>001-15373
<FILM-NUMBER>081267747
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>150 NORTH MERAMEC
<STREET2>150 NORTH MERAMEC
<CITY>CLAYTON
<STATE>MO
<ZIP>63105
<PHONE>3147255500
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>150 NORTH MERAMEC
<STREET2>150 NORTH MERAMEC
<CITY>CLAYTON
<STATE>MO
<ZIP>63105
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>ENTERBANK HOLDINGS INC
<DATE-CHANGED>19961024
</FORMER-COMPANY>
</FILER>
<DOCUMENT>
<TYPE>8-K/A
<SEQUENCE>1
<FILENAME>enterprise_8ka.htm
<DESCRIPTION>AMENDMENTS - CURRENT REPORT
<TEXT>

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<P align=center><B><FONT face=serif>UNITED STATES<BR></FONT></B><B><FONT face=serif>SECURITIES AND EXCHANGE COMMISSION</FONT></B><B><FONT face=serif size=5><BR></FONT></B><B><FONT face=serif>Washington, D.C. 20549</FONT></B></P>
<P align=center><B><FONT face=serif size=5>FORM 8-K/A</FONT></B><FONT face=serif> </FONT></P>
<P align=center><B><FONT face=serif>CURRENT REPORT</FONT></B></P>
<P align=center><B><FONT face=serif>Pursuant to Section 13 or 15(d) of
<BR></FONT></B><B><FONT face=serif>The Securities Exchange Act of
1934</FONT></B></P>
<P align=center><FONT face=serif size=2>Date of Report (Date of earliest event
reported)<BR>December 19, 2008</FONT></P>
<P align=center><B><FONT face=serif size=6>ENTERPRISE FINANCIAL SERVICES
<BR>CORP<BR></FONT></B><B><FONT face=serif size=1>(Exact name of registrant as
specified in its charter)</FONT></B><FONT face=serif> </FONT></P>
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD noWrap align=center width="33%"><B><FONT face=serif size=2>Delaware</FONT></B> </TD>
    <TD noWrap align=center width="33%"><B><FONT face=serif size=2>001-15373</FONT></B> </TD>
    <TD noWrap align=center width="33%"><B><FONT face=serif size=2>43-1706259</FONT></B> </TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=center width="33%"><FONT face=serif size=1>(State or
      Other Jurisdiction</FONT> </TD>
    <TD noWrap align=center width="33%"><FONT face=serif size=1>(Commission</FONT> </TD>
    <TD noWrap align=center width="33%"><FONT face=serif size=1>(IRS
      Employer</FONT> </TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=center width="33%"><FONT face=serif size=1>of
      Incorporation)</FONT> </TD>
    <TD noWrap align=center width="33%"><FONT face=serif size=1>File
      Number)</FONT> </TD>
    <TD noWrap align=center width="33%"><FONT face=serif size=1>Identification
      No.)</FONT> </TD></TR></TABLE><BR>
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD noWrap align=center width="50%"><B><FONT face=serif size=2>150 N.
      Meramec, St. Louis, Missouri</FONT></B> </TD>
    <TD noWrap align=center width="49%"><B><FONT face=serif size=2>63105</FONT></B> </TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=center width="50%"><FONT face=serif size=1>(Address of
      principal executive offices)</FONT> </TD>
    <TD noWrap align=center width="49%"><FONT face=serif size=1>(Zip
      Code)</FONT> </TD></TR></TABLE><BR>
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD noWrap align=center width="99%"><FONT face=serif size=2>Registrant&#146;s
      telephone number, including area code</FONT> </TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=center width="99%"><STRONG><FONT size=2>(314) <FONT face=serif>725-5500</FONT></FONT></STRONG> </TD></TR>
  <TR>
    <TD align=center width="99%">&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD style="BORDER-BOTTOM: #000000 1pt solid" align=center width="99%"><FONT face=serif size=2>Not applicable</FONT> </TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=center width="99%"><B><FONT face=serif size=1>(Former
      name or former address, if changed since last report)</FONT></B>
  </TD></TR></TABLE>
<P align=left><FONT face=serif size=2>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:</FONT><FONT face=serif>
</FONT></P>
<P align=justify>
<TABLE cellSpacing=0 cellPadding=0 border=0>

  <TR>
    <TD vAlign=top noWrap><FONT face=wingdings size=2>o</FONT></TD>
    <TD vAlign=top noWrap>&nbsp;&nbsp;&nbsp;&nbsp; </TD>
    <TD vAlign=top width="100%"><FONT face=serif size=2>Written communications
      pursuant to Rule 425 under the Securities Act (17 CFR
230.425)</FONT></TD></TR>
  <TR>
    <TD vAlign=top width="100%" colSpan=3>&nbsp;</TD></TR>
  <TR>
    <TD vAlign=top noWrap><FONT face=Wingdings size=2>o</FONT></TD>
    <TD vAlign=top noWrap></TD>
    <TD vAlign=top width="100%"><FONT face=serif size=2>Soliciting material
      pursuant to Rule 14a-12 under the Exchange Act (17 CFR
    240.14a-12)</FONT></TD></TR>
  <TR>
    <TD vAlign=top width="100%" colSpan=3>&nbsp;</TD></TR>
  <TR>
    <TD vAlign=top noWrap><FONT face=Wingdings size=2>o</FONT></TD>
    <TD vAlign=top noWrap></TD>
    <TD vAlign=top width="100%"><FONT face=serif size=2>Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b))</FONT></TD></TR>
  <TR>
    <TD vAlign=top width="100%" colSpan=3>&nbsp;</TD></TR>
  <TR>
    <TD vAlign=top noWrap><FONT face=Wingdings size=2>o</FONT></TD>
    <TD vAlign=top noWrap></TD>
    <TD vAlign=top width="100%"><FONT face=serif size=2>Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c))</FONT></TD></TR>
  <TR>
    <TD style="BORDER-BOTTOM: #000000 1.5pt solid" width="100%" colSpan=3>&nbsp; </TD></TR></TABLE><BR>
<HR align=center width="100%" noShade SIZE=2>
<PAGE>
<P align=justify><FONT face=serif size=2>Explanatory Note: Enterprise Financial
Services Corp (&#147;EFSC&#148;) filed a Current Report on Form 8-K with the Securities
and Exchange Commission on December 22, 2008 (the "Original Filing") under Items
1.01, 3.02, 3.03, 5.02 and 5.03 disclosing EFSC&#146;s sale to the United States
Department of the Treasury (the &#147;Treasury&#148;) of 35,000 shares of Fixed Rate
Cumulative Perpetual Preferred Stock, Series A (&#147;Preferred Stock&#148;). Item 1.01 of
the Original Filing incorrectly stated the number of shares of Preferred Stock
sold to the Treasury as 350,000. This amendment is filed solely to correct Item
1.01 of the Original Filing to accurately state the number of shares of
Preferred Stock sold to the Treasury.</FONT><B><FONT face=serif size=2>
</FONT></B></P>
<P align=justify><B><FONT face=serif size=2>Item 1.01 Entry into a Material
Definitive Agreement. </FONT></B></P>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>On
December 19, 2008, as part of the Capital Purchase Program (the &#147;CPP&#148;) offered
under the Emergency Economic Stabilization Act of 2008, we (&#147;EFSC&#148;), entered
into an agreement (the &#147;Agreement&#148;), with the United States Department of the
Treasury (the &#147;Treasury&#148;) to sell to the Treasury 35,000 shares of our Fixed
Rate Cumulative Perpetual Preferred Stock, Series A, (the &#147;Preferred Stock&#148;). We
also issued to the Treasury a ten-year Warrant (the &#147;Warrant&#148;) to purchase
324,074 shares (the &#147;Warrant Shares&#148;) of our common stock (&#147;Common Stock&#148;). In
consideration for the Preferred Stock and the Warrant, EFSC received proceeds of
$35,000,000. We intend to use the proceeds from the sale of the Preferred Stock
for purposes of funding prudent loan growth at Enterprise Bank &amp; Trust, our
wholly-owned bank subsidiary (the &#147;Bank&#148;). Through the first three quarters of
2008, the Bank increased loans by $301,000,000, or 18%. Almost two thirds of
such growth was produced from a wide range of commercial and industrial
businesses. In addition, we will also consider acquisitions within the Bank&#146;s
St. Louis, Missouri, Kansas City, Missouri, Kansas City, Kansas and Phoenix,
Arizona area markets that will increase the our market share and/or add value to
EFSC. </FONT></P>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>The
Preferred Stock qualifies as Tier 1 capital of EFSC and will pay cumulative
dividends at a rate of 5% per annum for the first five years, and at a rate of
9% per annum thereafter. The Preferred Stock carries with it a liquidation
preference of $1,000 per share over our Common Stock. The Preferred Stock has no
mandatory redemption or maturity date and is generally non-voting. We have the
right to redeem the Preferred Stock at our option at any time for a price per
share equal to the liquidation preference plus accrued and unpaid dividends at
any time, but until December 19, 2011, we may only exercise that right if and to
the extent that we have raised aggregate gross proceeds of not less than
$8,750,000 from the sale of our Common Stock or perpetual preferred stock
qualifying as Tier 1 capital.</FONT></P>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>Prior to
December 19, 2011, unless EFSC redeems the Preferred Stock or the Treasury
transfers the preferred Stock to a non-affiliated third party, the consent of
the Treasury will be required for us to (i) make distributions or pay dividends
on our Common Stock (other than regular quarterly dividends of not more than
$.0525 per share, which is the amount of our most recently declared regular
dividend) or (ii) redeem, purchase or acquire shares of Common Stock or other
equity or capital securities of EFSC, other than in connection with the
administration of its benefit plans consistent with past practice and certain
other circumstances specified in the Agreement. In addition, pursuant to the
Certificate of Designations approved by EFSC&#146;s Board of Directors and filed with
the Secretary of State of Delaware on December 17, 2008, creating the Preferred
Stock, our ability to declare or pay dividends or distributions on, or
repurchase Common Stock or other equity or capital securities of EFSC (including
trust preferred securities) will be subject to restrictions in the event we fail
to declare and pay full dividends on the Preferred Stock (or set aside a sum
sufficient for payment thereof).</FONT></P>
<HR align=center width="100%" noShade SIZE=2>
<PAGE>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>The
Warrant is immediately exercisable upon its issuance and has an initial exercise
price of $16.20 per share of Common Stock. The Warrant includes customary
anti-dilution provisions which provide for the adjustment of the exercise price
and the number of Warrant Shares upon the occurrence of certain events set forth
in the Warrant. Pursuant to the Agreement, the Treasury has also agreed not to
exercise voting power with respect to any Warrant Shares issued upon exercise of
the Warrant.</FONT></P>
<P align=justify><B><FONT face=serif size=2>Item 3.02 Unregistered Sales of
Equity Securities. </FONT></B></P>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>The
transactions described in response to Item 1.01 concerning the Agreement and the
issuance of the Preferred Stock and the Warrant constitute the offering and sale
of EFSC securities without prior registration under the Securities Act of 1933,
as amended, and the information set forth in Item 1.01 is incorporated herein by
reference. </FONT></P>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>We relied
upon the exemption from registration set forth in Section 4(2) of the Securities
Act of 1933, as amended, in connection with the offering and issuance of the
Preferred Stock and the Warrant (including the Common Stock issuable upon
exercise of the Warrant). We have agreed with the Treasury to file a &#147;shelf&#148;
registration statement under the Securities Act of 1933 to facilitate the
potential resale of the shares of Common Stock issuable upon exercise of the
Warrant. </FONT></P>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>We did
not engage in general solicitation or advertising with regard to the issuance
and sale of such securities and have not offered securities to the public in
connection with the transactions contemplated by the Agreement. The information
being furnished pursuant to this Current Report on Form 8-K and the exhibits
attached hereto shall not constitute an offer to sell or the solicitation of an
offer to buy such securities. </FONT></P>
<P align=justify><B><FONT face=serif size=2>Item 3.03 Material Modification of
Rights to Security Holders.</FONT></B><FONT face=serif size=2> </FONT></P>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>The
information related to the issuance of the Preferred Stock and the Warrant
discussed under Item 1.01 set forth above is hereby incorporated by reference
under this Item 3.03. The preferences accorded the Preferred Stock in respect of
dividends (as to both the priority and as to increases in dividends on our
Common Stock), in respect of liquidation, and the limits on our right to redeem
the Preferred Stock may be deemed to constitute a modification of the rights of
holders of our Common Stock. </FONT></P>
<P align=justify><B><FONT face=serif size=2>Item 5.02 Departure of Directors or
Certain Officers; Election of Directors; Appointment of Certain Officers;
Compensatory Arrangements of Certain Officers.</FONT></B></P>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>The
information related to the Agreement and to the issuance of the Preferred Stock
and the Warrant discussed under Item 1.01 set forth above is hereby incorporated
by reference under this Item 5.02.</FONT></P>
<HR align=center width="100%" noShade SIZE=2>
<PAGE>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>The
agreement with the Treasury concerning the sale of Preferred Stock requires EFSC
to comply with certain restrictions on executive compensation that could limit
the tax deductibility of compensation EFSC pays to its Senior Executive Officers
(as defined in the Agreement). In addition, EFSC was required to agree that,
until such time as the Treasury ceases to own any debt or equity securities of
EFSC acquired pursuant to the Agreement and the Warrant, EFSC will (i) ensure
that its benefit plans with respect to its Senior Executive Officers comply with
Section 111(b) of the Emergency Economic Stabilization Act of 2008 (the &#147;EESA&#148;)
as implemented by any guidance or regulation thereunder that has been issued and
is in effect as of the date of issuance of the Preferred Stock and the Warrant
and (ii) not adopt any benefit plans with respect to (or which cover) Senior
Executive Officers that do not comply with the EESA.</FONT></P>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>Accordingly, each of Mr. Peter F. Benoist, Mr. Frank H. Sanfilippo, Mr.
Stephen P. Marsh, Ms. Linda M. Hanson and Mr. John G. Barry, has entered into a
form of amendment to their respective employment agreements consenting to the
foregoing and also executed a form of waiver voluntarily waiving any claim
against the Treasury or EFSC for any changes to such Senior Executive Officer&#146;s
compensation and/or benefits that are required to comply with regulations issued
by the Treasury under the CPP and acknowledging that the regulation may require
modification of the compensation, bonus, incentive and other benefit plans,
arrangements, policies and agreements (including so-called &#147;golden parachute&#148;
agreements as they relate to the period the Treasury holds any equity or debt
securities of EFSC acquired through the CPP).</FONT></P>
<P align=justify><B><FONT face=serif size=2>Item 5.03 Amendments to Articles of
Incorporation or Bylaws; Change in Fiscal Year. </FONT></B></P>
<P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>The
Certificate of Designation reflecting the terms of the Preferred Stock has the
effect of an amendment to our Certificate of Incorporation under Delaware law
and is filed as Exhibit 3.1 hereto. The information relating to the terms of the
Preferred Stock set forth in Item 1.01 above is incorporated by reference into
this item 5.03. </FONT></P>
<P align=justify><B><FONT face=serif size=2>Item 9.01 Financial Statements and
Exhibits. </FONT></B></P>
<P align=justify><FONT face=serif size=2>(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Not
applicable.<BR>(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Not
applicable.<BR>(c)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Not
applicable.<BR>(d)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Exhibits.</FONT></P>
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD vAlign=top noWrap align=left width="1%"><FONT face=serif size=2>Exhibit</FONT>&nbsp; </TD>
    <TD vAlign=top noWrap align=left width="1%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </TD>
    <TD vAlign=top align=left width="97%">&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top noWrap align=left width="1%"><U><FONT face=serif size=2>Number</FONT></U>&nbsp; </TD>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top align=left width="97%"><U><FONT face=serif size=2>Description</FONT></U>&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%">&nbsp;</TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0><FONT face=serif size=2>3.1</FONT>&nbsp; </TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0>&nbsp;</TD>
    <TD vAlign=top align=left width="97%" bgColor=#c0c0c0>
      <P align=justify><FONT face=serif size=2>Certificate of Designations of
      Fixed Rate Cumulative Perpetual Preferred Stock, Series A, dated December
      17, 2008.*</FONT></P></TD></TR>
  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top noWrap align=left width="1%">&nbsp;</TD>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top align=left width="97%"><FONT face=serif size=2>&nbsp;</FONT></TD></TR>
  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0><FONT face=serif size=2>4.1</FONT>&nbsp; </TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0></TD>
    <TD vAlign=top align=left width="97%" bgColor=#c0c0c0>
      <P align=justify><FONT face=serif size=2>Warrant to Purchase Shares of
      Common Stock, dated December 19, 2008, by EFSC in favor of the
      Treasury.*</FONT></P></TD></TR></TABLE><BR>
<HR align=center width="100%" noShade SIZE=2>
<PAGE><BR>
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0><FONT face=serif size=2>99.1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      </FONT></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </TD>
    <TD vAlign=top align=left width="97%" bgColor=#c0c0c0>
      <P align=justify><FONT face=serif size=2>Letter Agreement, dated December
      19, 2008, including Securities Purchase Agreement &#150; Standard Terms
      incorporated&nbsp; by reference therein, between EFSC and the Treasury,
      with respect to the sale and issuance of the Preferred Stock&nbsp; and the
      Warrant.*</FONT></P></TD></TR>
  <TR>
    <TD vAlign=top width="1%"></TD>
    <TD vAlign=top width="99%" colSpan=3>&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0><FONT face=serif size=2>99.2</FONT></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0>&nbsp;</TD>
    <TD vAlign=top align=left width="97%" bgColor=#c0c0c0>
      <P align=justify><FONT face=serif size=2>Form of Waiver executed by each
      of Peter F. Benoist, Frank H. Sanfilippo, Linda M. Hanson, Stephen P.
      Marsh and&nbsp; John G. Barry.*</FONT></P></TD></TR>
  <TR>
    <TD vAlign=top width="1%"></TD>
    <TD vAlign=top width="99%" colSpan=3>&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0><FONT face=serif size=2>99.3</FONT></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0></TD>
    <TD vAlign=top align=left width="97%" bgColor=#c0c0c0>
      <P align=justify><FONT face=serif size=2>Form of First Amendment of
      Executive Employment Agreement, dated effective as of December 19, 2008,
      by and&nbsp; between the Company and Peter F.&nbsp;
  Benoist.*</FONT></P></TD></TR>
  <TR>
    <TD vAlign=top width="1%"></TD>
    <TD vAlign=top width="99%" colSpan=3>&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0><FONT face=serif size=2>99.4</FONT></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0></TD>
    <TD vAlign=top align=left width="97%" bgColor=#c0c0c0>
      <P align=justify><FONT face=serif size=2>Form of First Amendment of
      Executive Employment Agreement, dated effective as of December 19, 2008,
      by and&nbsp; between the Company and Linda M.&nbsp;
  Hanson.*</FONT></P></TD></TR>
  <TR>
    <TD vAlign=top width="1%"></TD>
    <TD vAlign=top width="99%" colSpan=3>&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0><FONT face=serif size=2>99.5</FONT></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0></TD>
    <TD vAlign=top align=left width="97%" bgColor=#c0c0c0>
      <P align=justify><FONT face=serif size=2>Form of First Amendment of
      Executive Employment Agreement, dated effective as of December 19, 2008,
      by and&nbsp; between the Company and Frank H.&nbsp;
    Sanfilippo.*</FONT></P></TD></TR>
  <TR>
    <TD vAlign=top width="1%"></TD>
    <TD vAlign=top width="99%" colSpan=3>&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0><FONT face=serif size=2>99.6</FONT></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0></TD>
    <TD vAlign=top align=left width="97%" bgColor=#c0c0c0>
      <P align=justify><FONT face=serif size=2>Form of First Amendment of
      Executive Employment Agreement, dated effective as of December 19, 2008,
      by and&nbsp; between the Company and Stephen P. Marsh.*</FONT></P></TD></TR>
  <TR>
    <TD vAlign=top width="1%"></TD>
    <TD vAlign=top width="99%" colSpan=3>&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD vAlign=top noWrap align=left width="1%"></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0><FONT face=serif size=2>99.7</FONT></TD>
    <TD vAlign=top noWrap align=left width="1%" bgColor=#c0c0c0></TD>
    <TD vAlign=top align=left width="97%" bgColor=#c0c0c0>
      <P align=justify><FONT face=serif size=2>Form of First Amendment of
      Executive Employment Agreement, dated effective as of December 19, 2008,
      by and&nbsp; between the Company, Enterprise Bank &amp; Trust and John G.
      Barry.*</FONT></P></TD></TR>
  <TR>
    <TD vAlign=top noWrap align=left width="1%" ></TD>
    <TD vAlign=top noWrap align=left width="1%"  bgColor=#ffffff></TD>
    <TD vAlign=top noWrap align=left width="1%"  bgColor=#ffffff></TD>
    <TD vAlign=top align=left width="97%"  bgColor=#ffffff>&nbsp;</TD></TR>
  <TR>
    <TD vAlign=top noWrap align=left width="1%" ></TD>
    <TD vAlign=top align=left width="99%"  bgColor=#ffffff colSpan=3>
      <P align=left><FONT face=serif size=2>*Previously filed as exhibits to
      Current Report on Form 8-K, filed on December 22,
  2008.</FONT></P></TD></TR></TABLE>
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<PAGE>

<P align=center><B><FONT face=serif size=2>SIGNATURES </FONT></B></P>
<P align=justify><FONT face=serif size=2>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 thereunto duly authorized.
</FONT></P>
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  <TR vAlign=bottom>
    <TD noWrap align=left width="50%">&nbsp; </TD>
    <TD noWrap align=left width="49%" colSpan=3><FONT face=serif size=2>ENTERPRISE FINANCIAL SERVICES CORP.</FONT>&nbsp; </TD></TR>
  <TR>
    <TD noWrap align=left width="50%"></TD>
    <TD noWrap align=right width="49%" colSpan=3>&nbsp;&nbsp;&nbsp;</TD></TR>
  <TR>
    <TD noWrap align=left width="50%"></TD>
    <TD noWrap align=left width="1%"><FONT size=2>By:</FONT> </TD>
    <TD noWrap align=left width="9%">&nbsp;</TD>
    <TD noWrap align=left width="39%">&nbsp;</TD></TR>
  <TR>
    <TD width="99%" colSpan=4>&nbsp;&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=left width="50%"><FONT face=serif size=2>Date: December
      23, 2008<FONT size=3>&nbsp;&nbsp;</FONT></FONT>&nbsp; </TD>
    <TD noWrap align=right width="1%">&nbsp;</TD>
    <TD style="BORDER-BOTTOM: #000000 1pt dotted" noWrap align=right width="9%"><FONT size=2>/s/ </FONT>&nbsp;</TD>
    <TD style="BORDER-BOTTOM: #000000 1pt dotted" noWrap align=left width="39%"><FONT size=2>Deborah N. Barstow</FONT>&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=left width="50%">&nbsp;</TD>
    <TD noWrap align=left width="10%" colSpan=2></TD>
    <TD noWrap align=left width="39%"><FONT size=2>Deborah N.
      Barstow</FONT>&nbsp; </TD></TR>
  <TR vAlign=bottom>
    <TD noWrap align=left width="50%">&nbsp; </TD>
    <TD noWrap align=left width="10%" colSpan=2></TD>
    <TD noWrap align=left width="39%"><FONT size=2>Senior Vice President and
      Controller</FONT>&nbsp; </TD></TR></TABLE><BR>
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