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<!-- Field: Rule-Page --><DIV ALIGN="LEFT" STYLE="margin-top: 12pt; margin-bottom: 3pt"><DIV STYLE="font-size: 1pt; border-top: Black 2pt solid; border-bottom: Black 1pt solid; width: 100%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-size: 14pt">UNITED STATES</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-size: 14pt">SECURITIES AND
EXCHANGE COMMISSION</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Washington, D.C. 20549</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-size: 16pt">FORM 8-K</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">CURRENT REPORT</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">PURSUANT TO SECTION 13 or 15(d)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">OF THE SECURITIES EXCHANGE ACT OF 1934</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Date of Report (Date of earliest event reported):
September 26, 2013</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><IMG SRC="image_001.jpg" ALT="" STYLE="height: 64.5pt; width: 157.5pt"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(Exact name of registrant as specified in its
charter)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
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    <TD STYLE="width: 51%; padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><U>Connecticut </U></FONT></TD>
    <TD STYLE="width: 22%; padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><U>1-15052</U></FONT></TD>
    <TD STYLE="width: 27%; padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><U>06-1541045</U></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">(State or other jurisdiction</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">(Commission</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">(IRS Employer</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">of Incorporation)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">File Number)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Identification No.)</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><U>157 Church Street, New Haven, Connecticut</U></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><U>06506</U></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">(Address of principal executive offices)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">(Zip Code)</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Registrant's Telephone Number, </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><U>Including Area Code</U></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><U>(203) 499-2000</U></FONT></TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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    <TD STYLE="width: 100%; border-bottom: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Not Applicable</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">(Former name or former address, if changed since last report)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">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 (<I>see</I> General Instruction
A.2. below):</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Wingdings 2">&pound;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&#9;Written
communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Wingdings 2">&pound;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&#9;Soliciting
material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Wingdings 2">&pound;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&#9;Pre-commencement
communications pursuant to Rule 14d-2(b) under the Exchange Act (17 &#9;CFR 240.14d-2(b))</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Wingdings 2">&pound;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&#9;Pre-commencement
communications pursuant to Rule 13e-4(c) under the Exchange Act &#9;(17 CFR 240.13e-4(c))</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>Item&nbsp;7.01 Regulation&nbsp;FD Disclosure</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On September&nbsp;26, 2013, UIL Holdings Corporation
(the &ldquo;Registrant&rdquo;) issued a press release announcing that the public offering of 5,000,000 shares of its common stock
was priced at $37.25 per share. A copy of the press release is attached hereto as Exhibit&nbsp;99.1.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The Registrant is furnishing the information
in this Item&nbsp;7.01 and in Exhibit&nbsp;99.1 to comply with Regulation&nbsp;FD. Such information, including Exhibit&nbsp;99.1,
shall not be deemed &ldquo;filed&rdquo; for any purpose, including for the purposes of Section&nbsp;18 of the Securities Exchange
Act of 1934, as amended (the &ldquo;Exchange Act&rdquo;), or otherwise subject to the liabilities of that Section. The information
in this Item&nbsp;7.01, including Exhibit&nbsp;99.1, shall not be deemed incorporated by reference into any filing under the Securities
Act of 1933 as amended, or the Exchange Act, regardless of any general incorporation language in such filings.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>Item&nbsp;8.01 Other Events</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On September&nbsp;26, 2013, the Registrant
entered into an underwriting agreement (the &ldquo;Underwriting Agreement&rdquo;) with J.P. Morgan Securities LLC, Merrill Lynch,
Pierce, Fenner &amp; Smith Incorporated and Wells Fargo Securities, LLC in connection with the public offering and sale by the Registrant
of 5,000,000 shares of the Registrant&rsquo;s common stock at a price of $37.25  per share. Pursuant to the terms of the Underwriting
Agreement, the Registrant also granted the underwriters a 30-day option to purchase up to an additional 750,000 shares of the Registrant&rsquo;s
common stock. The shares will be issued in an underwritten public offering pursuant to the Registrant&rsquo;s Registration Statement
on Form S-3 (Registration No.&nbsp;333-179998), filed with the Securities and Exchange Commission on March&nbsp;8, 2012, and the
related prospectus dated March 8, 2012 and prospectus supplement dated September&nbsp;26, 2013. The closing of the offering is
expected to occur on October 2, 2013, subject to the satisfaction of customary closing conditions.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">The above description of the Underwriting Agreement
is qualified in its entirety by reference to the full text of the Underwriting Agreement, a copy of which is filed as Exhibit&nbsp;1.1
hereto and is incorporated herein by reference.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">In connection with the offering of the common
stock described above, the Registrant is filing certain exhibits as part of this Current Report on Form 8-K (Exhibits 1.1, 5.1
and 23.1) that are to be incorporated by reference in their entirety into the Registration Statement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><B></B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><B></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>Item&nbsp;9.01 Financial Statements and Exhibits</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 4%"></TD>
    <TD STYLE="width: 1%"></TD>
    <TD STYLE="width: 95%"></TD></TR>
<TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">(d) </FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top; text-align: justify"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Exhibits: The following exhibits are filed, or in the case of Exhibit 99.1 furnished, as part of this report:</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: justify">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top"></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top; text-align: justify"></TD></TR>
<TR>
    <TD STYLE="vertical-align: top"></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top; text-align: justify"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><U>Exhibit&nbsp;Description</U></FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top"></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top; text-align: justify"></TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 10pt"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
<TR>
    <TD STYLE="vertical-align: top; width: 4%"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">1.1 </FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 1%"></TD>
    <TD STYLE="vertical-align: top; text-align: justify; width: 95%"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Underwriting Agreement, dated September&nbsp;26, 2013 among UIL Holdings Corporation and J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner &amp; Smith Incorporated and Wells Fargo Securities, LLC, as representatives of the</FONT><FONT STYLE="font-size: 10pt"> <FONT STYLE="font-family: Times New Roman, Times, Serif">several underwriters </FONT></FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: justify">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top"></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top; text-align: justify"></TD></TR>
<TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">5.1 </FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top; text-align: justify"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Opinion of Wiggin and Dana LLP, acting as counsel to UIL Holdings Corporation, with respect to the legality of the common stock being registered</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: justify">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top"></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top; text-align: justify"></TD></TR>
<TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">23.1 </FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top; text-align: justify"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Consent of Wiggin and Dana LLP, acting as counsel to UIL Holdings Corporation (included in Exhibit&nbsp;5.1 hereto)</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: justify">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top"></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top; text-align: justify"></TD></TR>
<TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">99.1 </FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top; text-align: justify"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Press release issued by UIL Holdings Corporation on September&nbsp;26, 2013</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 10pt"><B><I>&nbsp;</I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 10pt"><B><I>Forward-Looking Statements</I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 10pt; text-align: justify"><I>Certain statements contained herein,
regarding matters that are not historical facts, are forward-looking statements (as defined in the Private Securities Litigation
Reform Act of 1995). These include statements regarding management&rsquo;s intentions, plans, beliefs, expectations or forecasts
for the future. Such forward-looking statements are based on management&rsquo;s expectations and involve risks and uncertainties;
consequently, actual results may differ materially from those expressed or implied in the statements. Such risks and uncertainties
include, but are not limited to, general economic conditions, legislative and regulatory changes, changes in demand for electricity,
gas and other products and services, unanticipated weather conditions, changes in accounting principles, policies or guidelines,
and other economic, competitive, governmental, and technological factors affecting the operations, markets, products and services
of UIL Holdings&rsquo; subsidiaries, The United Illuminating Company, The Southern Connecticut Gas Company, Connecticut Natural
Gas Corporation and The Berkshire Gas Company. The foregoing and other factors are discussed and should be reviewed in our most
recent Annual Report on Form 10-K for the year ended December 31, 2012, as amended, and other subsequent filings with the Securities
and Exchange Commission. Forward-looking statements included herein speak only as of the date hereof and we undertake no obligation
to revise or update such statements to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated
events or circumstances.</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 10pt"></P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 10pt; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">SIGNATURES</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">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.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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    <TD STYLE="width: 50%"></TD>
    <TD STYLE="width: 3%"></TD>
    <TD STYLE="width: 1%"></TD>
    <TD STYLE="width: 31%"></TD>
    <TD STYLE="width: 15%"></TD></TR>
<TR>
    <TD STYLE="vertical-align: top"></TD>
    <TD COLSPAN="3"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">UIL HOLDINGS CORPORATION</FONT><BR>
<FONT STYLE="font: 10pt Times New Roman, Times, Serif">Registrant</FONT><BR>
<BR>
<FONT STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</FONT></TD>
    <TD></TD></TR>
<TR>
    <TD><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Date: September 27, 2013</FONT></TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">By&nbsp;&nbsp;</FONT></TD>
    <TD COLSPAN="2" STYLE="border-bottom: black 1pt solid"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">/s/ Richard J. Nicholas</FONT></TD>
    <TD></TD></TR>
<TR>
    <TD></TD>
    <TD></TD>
    <TD COLSPAN="2"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Richard J. Nicholas&nbsp;</FONT></TD>
    <TD></TD></TR>
<TR>
    <TD></TD>
    <TD></TD>
    <TD COLSPAN="2"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Executive Vice President and</FONT><BR>
<FONT STYLE="font: 10pt Times New Roman, Times, Serif">Chief Financial Officer&nbsp;</FONT></TD>
    <TD></TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B><U>Exhibit&nbsp;Index</U></B></P>

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    <TD STYLE="width: 93%"></TD></TR>
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    <TD NOWRAP STYLE="border-bottom: black 1pt solid"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><B>Exhibit</B></FONT></TD>
    <TD></TD>
    <TD NOWRAP STYLE="border-bottom: black 1pt solid"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><B>Description</B></FONT></TD></TR>
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    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top"></TD></TR>
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    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">1.1 </FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Underwriting Agreement, dated September&nbsp;26, 2013 among UIL Holdings Corporation and J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner &amp; Smith Incorporated and Wells Fargo Securities, LLC, as representatives of the several underwriters</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top"></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top"></TD></TR>
<TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">5.1 </FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Opinion of Wiggin and Dana LLP, acting as counsel to UIL Holdings Corporation, with respect to the legality of the common stock being registered</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top"></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top"></TD></TR>
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    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">23.1 </FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Consent of Wiggin and Dana LLP, acting as counsel to UIL Holdings Corporation (included in Exhibit&nbsp;5.1 hereto)</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
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    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top"></TD></TR>
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    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">99.1 </FONT></TD>
    <TD STYLE="vertical-align: bottom"></TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Press release issued by UIL Holdings Corporation on September&nbsp;26, 2013</FONT></TD></TR>
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{"company-data": {"conformed-name": "UIL HOLDINGS CORP", "cik": "0001082510", "assigned-sic": "4911", "irs-number": "061541045", "state-of-incorporation": "CT", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-15052", "film-number": "131118340"}, "business-address": {"street1": "157 CHURCH ST", "city": "NEW HAVEN", "state": "CT", "zip": "06510", "phone": "2034992000"}, "mail-address": {"street1": "157 CHURCH ST", "city": "NEW HAVEN", "state": "CT", "zip": "06510"}}
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 26, 2013
(Exact name of registrant as specified in its
charter)
Connecticut
1-15052
06-1541045
(State or other jurisdiction
(Commission
(IRS Employer
of Incorporation)
File Number)
Identification No.)
157 Church Street, New Haven, Connecticut
06506
(Address of principal executive offices)
(Zip Code)
Registrant's Telephone Number,
Including Area Code
(203) 499-2000
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 (
see
General Instruction
A.2. below):
£
Written
communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
£
Soliciting
material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
£
Pre-commencement
communications pursuant to Rule 14d-2(b) under the Exchange Act (17 	CFR 240.14d-2(b))
£
Pre-commencement
communications pursuant to Rule 13e-4(c) under the Exchange Act 	(17 CFR 240.13e-4(c))
Item 7.01 Regulation FD Disclosure
On September 26, 2013, UIL Holdings Corporation
(the "Registrant") issued a press release announcing that the public offering of 5,000,000 shares of its common stock
was priced at $37.25 per share. A copy of the press release is attached hereto as Exhibit 99.1.
The Registrant is furnishing the information
in this Item 7.01 and in Exhibit 99.1 to comply with Regulation FD. Such information, including Exhibit 99.1,
shall not be deemed "filed" for any purpose, including for the purposes of Section 18 of the Securities Exchange
Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that Section. The information
in this Item 7.01, including Exhibit 99.1, shall not be deemed incorporated by reference into any filing under the Securities
Act of 1933 as amended, or the Exchange Act, regardless of any general incorporation language in such filings.
Item 8.01 Other Events
On September 26, 2013, the Registrant
entered into an underwriting agreement (the "Underwriting Agreement") with J.P. Morgan Securities LLC, Merrill Lynch,
Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC in connection with the public offering and sale by the Registrant
of 5,000,000 shares of the Registrant's common stock at a price of $37.25  per share. Pursuant to the terms of the Underwriting
Agreement, the Registrant also granted the underwriters a 30-day option to purchase up to an additional 750,000 shares of the Registrant's
common stock. The shares will be issued in an underwritten public offering pursuant to the Registrant's Registration Statement
on Form S-3 (Registration No. 333-179998), filed with the Securities and Exchange Commission on March 8, 2012, and the
related prospectus dated March 8, 2012 and prospectus supplement dated September 26, 2013. The closing of the offering is
expected to occur on October 2, 2013, subject to the satisfaction of customary closing conditions.
The above description of the Underwriting Agreement
is qualified in its entirety by reference to the full text of the Underwriting Agreement, a copy of which is filed as Exhibit 1.1
hereto and is incorporated herein by reference.
In connection with the offering of the common
stock described above, the Registrant is filing certain exhibits as part of this Current Report on Form 8-K (Exhibits 1.1, 5.1
and 23.1) that are to be incorporated by reference in their entirety into the Registration Statement.
Item 9.01 Financial Statements and Exhibits
(d)
Exhibits: The following exhibits are filed, or in the case of Exhibit 99.1 furnished, as part of this report:
Exhibit Description
1.1
Underwriting Agreement, dated September 26, 2013 among UIL Holdings Corporation and J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC, as representatives of the
several underwriters
5.1
Opinion of Wiggin and Dana LLP, acting as counsel to UIL Holdings Corporation, with respect to the legality of the common stock being registered
23.1
Consent of Wiggin and Dana LLP, acting as counsel to UIL Holdings Corporation (included in Exhibit 5.1 hereto)
99.1
Press release issued by UIL Holdings Corporation on September 26, 2013
Forward-Looking Statements
Certain statements contained herein,
regarding matters that are not historical facts, are forward-looking statements (as defined in the Private Securities Litigation
Reform Act of 1995). These include statements regarding management's intentions, plans, beliefs, expectations or forecasts
for the future. Such forward-looking statements are based on management's expectations and involve risks and uncertainties;
consequently, actual results may differ materially from those expressed or implied in the statements. Such risks and uncertainties
include, but are not limited to, general economic conditions, legislative and regulatory changes, changes in demand for electricity,
gas and other products and services, unanticipated weather conditions, changes in accounting principles, policies or guidelines,
and other economic, competitive, governmental, and technological factors affecting the operations, markets, products and services
of UIL Holdings' subsidiaries, The United Illuminating Company, The Southern Connecticut Gas Company, Connecticut Natural
Gas Corporation and The Berkshire Gas Company. The foregoing and other factors are discussed and should be reviewed in our most
recent Annual Report on Form 10-K for the year ended December 31, 2012, as amended, and other subsequent filings with the Securities
and Exchange Commission. Forward-looking statements included herein speak only as of the date hereof and we undertake no obligation
to revise or update such statements to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated
events or circumstances.
SIGNATURES
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.
UIL HOLDINGS CORPORATION
Registrant
Date: September 27, 2013
By
/s/ Richard J. Nicholas
Richard J. Nicholas
Executive Vice President and
Chief Financial Officer
Exhibit Index
Exhibit
Description
1.1
Underwriting Agreement, dated September 26, 2013 among UIL Holdings Corporation and J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC, as representatives of the several underwriters
5.1
Opinion of Wiggin and Dana LLP, acting as counsel to UIL Holdings Corporation, with respect to the legality of the common stock being registered
23.1
Consent of Wiggin and Dana LLP, acting as counsel to UIL Holdings Corporation (included in Exhibit 5.1 hereto)
99.1
Press release issued by UIL Holdings Corporation on September 26, 2013