<SEC-DOCUMENT>0001193125-25-009591.txt : 20250121
<SEC-HEADER>0001193125-25-009591.hdr.sgml : 20250121
<ACCEPTANCE-DATETIME>20250121164608
ACCESSION NUMBER:		0001193125-25-009591
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		16
FILED AS OF DATE:		20250121
DATE AS OF CHANGE:		20250121
EFFECTIVENESS DATE:		20250121

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITIL CORP
		CENTRAL INDEX KEY:			0000755001
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
		ORGANIZATION NAME:           	01 Energy & Transportation
		IRS NUMBER:				020381573
		STATE OF INCORPORATION:			NH
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-284384
		FILM NUMBER:		25543045

	BUSINESS ADDRESS:	
		STREET 1:		6 LIBERTY LANE WEST
		CITY:			HAMPTON
		STATE:			NH
		ZIP:			03842
		BUSINESS PHONE:		6037736504

	MAIL ADDRESS:	
		STREET 1:		6 LIBERTY LANE WEST
		CITY:			HAMPTON
		STATE:			NH
		ZIP:			03842
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>d918508ds8.htm
<DESCRIPTION>S-8
<TEXT>
<HTML><HEAD>
<TITLE>S-8</TITLE>
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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JANUARY&nbsp;21, 2025 </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Registration <FONT STYLE="white-space:nowrap">No.&nbsp;333-&#8195;&#8195;&#8195;</FONT> </B></P>
<P STYLE="font-size:4pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P> <P STYLE="margin-top:4pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>UNITED STATES </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>SECURITIES AND EXCHANGE COMMISSION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>WASHINGTON, D.C. 20549 </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>FORM <FONT
STYLE="white-space:nowrap">S-8</FONT> </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>REGISTRATION STATEMENT </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B><I>under </I></B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B><I>THE
SECURITIES ACT OF 1933 </I></B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center> <P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman" ALIGN="center"><B>UNITIL CORPORATION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(Exact name of registrant as specified in its charter) </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:8pt" ALIGN="center">


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<TD VALIGN="top" ALIGN="center"><B>New Hampshire</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"><B><FONT STYLE="white-space:nowrap">02-0381573</FONT></B></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(State or other jurisdiction of</B></P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>incorporation or organization)</B></P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(I.R.S. Employer</B></P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>Identification Number)</B></P></TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>6 Liberty Lane West, Hampton, New Hampshire 03842-1720 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Address of principal executive offices, including zip code) </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>UNITIL CORPORATION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>THIRD AMENDED AND RESTATED </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>2003 STOCK PLAN </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Full
title of plan) </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center> <P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Daniel J. Hurstak </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Senior Vice President, Chief Financial Officer and Treasurer </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>UNITIL CORPORATION </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>6
Liberty Lane West </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Hampton, New Hampshire 03842-1720 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Name and address of agent for service) </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(603) <FONT STYLE="white-space:nowrap">772-0775</FONT> </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Telephone number, including area code, of agent for service) </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center> <P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><I></I><B><I>Copies to</I></B><I>: </I></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Sandra L. Whitney </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Corporate Secretary </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>UNITIL CORPORATION </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>6
Liberty Lane West </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Hampton, New Hampshire 03842-1720 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(603) <FONT STYLE="white-space:nowrap">772-0775</FONT> </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Indicate by check mark whether
the Registrant is a large accelerated filer, an accelerated filer, a <FONT STYLE="white-space:nowrap">non-accelerated</FONT> filer, a smaller reporting company or an emerging growth company. See definitions of &#147;large accelerated filer,&#148;
&#147;accelerated filer,&#148; &#147;smaller reporting company,&#148; and &#147;emerging growth company&#148; in Rule <FONT STYLE="white-space:nowrap">12b-2</FONT> of the Exchange Act. </P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom">Large&nbsp;accelerated&nbsp;filer</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&#9746;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Accelerated&nbsp;filer</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&#9744;</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom">Non-accelerated filer</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&#9744;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Smaller&nbsp;reporting&nbsp;company</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&#9744;</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Emerging&nbsp;growth&nbsp;company</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&#9744;</TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period
for complying with any new or revised financial accounting standards provided pursuant to Section&nbsp;7(a)(2)(B) of the Securities Act.&#8194;&#9744; </P> <P STYLE="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P> <P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>EXPLANATORY NOTE </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Unitil Corporation, a New Hampshire corporation, is filing this Registration Statement on Form <FONT STYLE="white-space:nowrap">S-8</FONT> for the purpose of
registering 350,000 shares of its common stock, no par value per share, issuable to eligible persons under the Unitil Corporation Third Amended and Restated 2003 Stock Plan (as amended and restated, the &#147;2003 Plan&#148;). </P>
<P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>PART I - INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The information required by Part I of Form <FONT STYLE="white-space:nowrap">S-8</FONT> to be contained in the Section&nbsp;10(a) prospectus is omitted from
this registration statement in accordance with Rule 428 under the Securities Act of 1933, as amended (the &#147;Securities Act&#148;). The document(s) containing the information specified in Part I will be sent or given to participants in the 2003
Plan as specified by Rule 428(b)(1) of the Securities Act. Such documents are not being filed with the Securities and Exchange Commission (the &#147;Commission&#148;) as part of this registration statement or as prospectuses or prospectus
supplements pursuant to Rule 424 of the Securities Act. These documents and the documents incorporated by reference in the registration statement pursuant to Item 3 of Part II of this form, taken together, constitute a prospectus that meets the
requirements of Section&nbsp;10(a) of the Securities Act. </P> <P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>PART II - INFORMATION REQUIRED IN THE REGISTRATION STATEMENT </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Item&#8201;3. Incorporation of Documents by Reference </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">We
incorporate by reference in this registration statement the following documents, which have been filed with the Commission pursuant to the Securities Exchange Act of 1934, as amended (the &#147;Exchange Act&#148;), other than any information we
furnish, rather than file, with the Commission pursuant to certain items of Form <FONT STYLE="white-space:nowrap">10-K,</FONT> Form <FONT STYLE="white-space:nowrap">10-Q,</FONT> or Form <FONT STYLE="white-space:nowrap">8-K:</FONT> </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">Annual Report on <A HREF="http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/755001/000095017024014186/utl-20231231.htm">Form
 <FONT STYLE="white-space:nowrap">10-K</FONT></A> for the fiscal year ended December&nbsp;31, 2023, filed on February&nbsp;13, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT> </P></TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">Quarterly Reports on Form <FONT STYLE="white-space:nowrap">10-Q</FONT> for the quarters ended <A HREF="http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/755001/000095017024053926/utl-20240331.htm">March&nbsp;31,
 2024</A> (filed on May&nbsp;7, 2024), <A HREF="http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/755001/000095017024091194/utl-20240630.htm">June&nbsp;30, 2024</A> (filed on August&nbsp;
6, 2024) and <A HREF="http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/755001/000095017024120859/utl-20240930.htm">September&nbsp;30, 2024</A> (filed on November&nbsp;4, 2024) (each, SEC File
<FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT> </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">Current Reports on Form <FONT STYLE="white-space:nowrap">8-K</FONT> filed on <A HREF="http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/755001/000119312524126364/d796818d8k.htm">May&nbsp;1,
 2024</A>, <A HREF="http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/755001/000119312524133173/d816815d8k.htm">May&nbsp;
7, 2024</A>, <A HREF="http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/755001/000119312524178604/d786482d8k.htm">July&nbsp;
12, 2024</A>, <A HREF="http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/755001/000119312524181278/d869738d8k.htm">July&nbsp;
19, 2024</A>, <A HREF="http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/755001/000119312524207775/d227567d8k.htm">August&nbsp;
27, 2024</A>, and <A HREF="http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/755001/000119312524251276/d891602d8k.htm">November&nbsp;5, 2024</A> (each, SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858);</FONT>
and </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">The description of our common stock, no par value, contained in the registration statement on <A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312517332813/d468713d8a12ba.htm">Form
 <FONT STYLE="white-space:nowrap">8-A/A</FONT></A>, filed on November&nbsp;3, 2017. </P></TD></TR></TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">All documents that we subsequently file pursuant to
Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, other than any information we furnish, rather than file, with the Commission pursuant to certain items of Form&nbsp;10-K, Form&nbsp;10-Q or Form <FONT STYLE="white-space:nowrap">8-K,</FONT>
prior to the filing of a post-effective amendment which indicates that all securities offered have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference in the registration statement and
to be part hereof from the date of filing of such documents. Any statement contained in a document incorporated or deemed to be incorporated by reference or deemed to be part of the registration statement shall be deemed to be modified or superseded
for purposes of the registration statement to the extent that a statement contained in any other subsequently filed document which also is or is deemed to be incorporated by reference or deemed to be part of the registration statement modifies or
replaces such statement. Any statement contained in a document that is deemed to be incorporated by reference or deemed to be part of the registration statement after the most recent effective date may modify or replace existing statements contained
in the registration statement. Any such statement so modified shall not be deemed in its unmodified form to constitute a part of the registration statement for purposes of the Securities Act. Any such statement so replaced shall not be deemed to
constitute a part of the registration statement for purposes of the Securities Act. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Item&#8201;4. Description of Securities </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Not applicable. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">1 </P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Item&#8201;5. Interests of Named Experts and Counsel </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The validity of the shares of common stock to be sold under this registration statement will be passed upon for us by Patrick Taylor, our Chief Regulatory
Counsel. As of January&nbsp;20, 2025, Mr.&nbsp;Taylor beneficially owned approximately 2,980 shares of our common stock. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Item&#8201;6. Indemnification
of Directors and Officers </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">We are organized under the laws of the State of New Hampshire. The New Hampshire Business Corporation Act (the
&#147;NHBCA&#148;) provides that a corporation may indemnify an individual made a party to a proceeding because he is or was a director against liability incurred in the proceeding if: (1)&nbsp;he conducted himself in good faith; and (2)&nbsp;he
reasonably believed (i)&nbsp;in the case of conduct in his official capacity with the corporation, that his conduct was in its best interests; and (ii)&nbsp;in all other cases, that his conduct was at least not opposed to its best interests; and
(3)&nbsp;in the case of any criminal proceeding, he had no reasonable cause to believe his conduct was unlawful. A corporation may pay for or reimburse the reasonable expenses incurred by a director who is a party to a proceeding in advance of the
final disposition of the proceeding if (1)&nbsp;the director furnishes the corporation a written affirmation of his good faith belief that he has met the standard of conduct described in the preceding sentence, (2)&nbsp;the director furnishes the
corporation a written undertaking, executed personally or on his behalf, to repay the advance if it is ultimately determined that he did not meet the standard of conduct and (3)&nbsp;a determination is made that the facts then known to those making
the determination would not preclude indemnification. Unless a corporation&#146;s Articles of Incorporation provide otherwise, the corporation may indemnify and advance expenses to an officer, employee or agent of the corporation who is not a
director to the same extent as to a director. A corporation may not indemnify a director (x)&nbsp;in connection with a proceeding by or in the right of the corporation in which the director was adjudged liable to the corporation; or (y)&nbsp;in
connection with any other proceeding charging improper personal benefit to him, whether or not involving action in his official capacity, in which he was adjudged liable on the basis that personal benefit was improperly received by him. Unless
limited by its Articles of Incorporation, a corporation shall indemnify a director or officer who was wholly successful, on the merits or otherwise, in the defense of any proceeding to which he was a party because he is or was a director or officer
of the corporation against reasonable expenses incurred by him in connection with the proceeding. A corporation may purchase and maintain insurance on behalf of an individual who is or was a director, officer, employee, or agent of the corporation,
or who, while a director, officer, employee or agent of the corporation, is or was serving at the request of the corporation as a director, officer, partner, trustee, employee, or agent of another foreign or domestic corporation, partnership, joint
venture, trust, employee benefit plan, or other enterprise, against liability asserted against or incurred by him in that capacity or arising from his status as a director, officer, employee, or agent, whether or not the corporation would have power
to indemnify him against the same liability under the NHBCA. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Article XIII of our Fourth Amended and Restated
<FONT STYLE="white-space:nowrap">By-Laws</FONT> provides that we shall indemnify any person who was or is a party, or is threatened to be made a party, to any threatened, pending or completed action, suit or proceeding, whether civil, criminal,
administrative or investigative, by reason of the person&#146;s having served as, or by reason of the person&#146;s alleged acts or omissions while serving as, a director, officer, employee or agent of Unitil Corporation, or while serving at our
request as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses, including attorneys&#146; fees, judgments, fines and amounts paid in settlement or otherwise actually
and reasonably incurred by such person in connection with the action, suit or proceeding, if the person acted in good faith and in a manner he reasonably believed to be in or not opposed to the best interests of Unitil Corporation, and, with respect
to any criminal action or proceeding, had no reasonable cause to believe his conduct was unlawful, said indemnification to be to the full extent permitted by law under the circumstances, including, without limitation, by all applicable provisions of
the NHBCA. Any indemnification under Article XIII shall be made by us with respect to directors or other persons after a determination that the person to be indemnified has met the standards of conduct set forth in the NHBCA, such determination to
be made by the Board of Directors, by majority vote of a quorum, or by other persons authorized to make such a determination under the NHBCA. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The right
of indemnification arising under Article XIII of our Fourth Amended and Restated <FONT STYLE="white-space:nowrap">By-Laws</FONT> was adopted for the purpose of inducing persons to serve and to continue to serve Unitil Corporation without concern
that their service may expose them to personal financial harm. It is to be broadly construed, applied and implemented in light of that purpose. It is not to be exclusive of any other right to which any such person is entitled under any agreement,
vote of the stockholders or the Board of Directors, statute, or as a matter of law, or otherwise, nor is it to be </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">2 </P>

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construed to limit or confine in any respect the power of the Board of Directors to grant indemnity pursuant to any applicable statutes or laws of the State of New Hampshire. The provisions of
Article XIII are separable, and, if any provision or portion thereof is for any reason held inapplicable, illegal or ineffective, such holding will not affect any other right of indemnification existing under Article XIII or otherwise. As used in
Article XIII, the term &#147;person&#148; includes heirs, executors, administrators or other legal representatives. As used in Article XIII, the terms &#147;director&#148; and &#147;officer&#148; include persons elected or appointed as officers by
the Board of Directors, persons elected as directors by the stockholders or by the Board of Directors, and persons who serve by vote or at our request as directors, officers or trustees of another organization in which we have any direct or indirect
interest as a shareholder, creditor or otherwise. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Article XIII of our Fourth Amended and Restated <FONT STYLE="white-space:nowrap">By-Laws</FONT> also
allows us to purchase and maintain insurance on behalf of any person who was or is a director, officer or employee of Unitil Corporation or any of its subsidiaries, or who was or is serving at our request as a fiduciary of any employee benefit plan
of Unitil Corporation or any subsidiary, against any liability asserted against, and incurred by, such person in any such capacity, or arising out of such person&#146;s status as such, whether or not we would have the power to indemnify such person
against such liability under the provisions of the NHBCA. The obligation to indemnify and reimburse such person under our Fourth Amended and Restated <FONT STYLE="white-space:nowrap">By-Laws,</FONT> if applicable, will be reduced by the amount of
any such insurance proceeds paid to such person, or the representatives or successors of such person. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Item&#8201;7. Exemption from Registration
Claimed </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Not applicable. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Item&#8201;8. Exhibits
</B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD VALIGN="bottom" ALIGN="center"><B>Exhibit&nbsp;No.</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"><B>Description of Exhibit</B></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"><B>Reference (1)</B></TD></TR>


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<TD VALIGN="top" NOWRAP>&#8199;&#8199;3.1&nbsp;(P)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Articles of Incorporation of Unitil Corporation</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Exhibit 3.1 to the Registrant&#146;s Registration Statement on Form <FONT STYLE="white-space:nowrap">S-14</FONT> <FONT STYLE="white-space:nowrap">No.&nbsp;2-93769</FONT> dated October&nbsp;12, 1984.</TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;3.2&nbsp;(P)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Articles of Amendment to the Articles of Incorporation of Unitil Corporation filed on March&nbsp;4, 1992</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Exhibit 3.2 to Form <FONT STYLE="white-space:nowrap">10-K</FONT> for 1991 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858).</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
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<TD HEIGHT="8" COLSPAN="2"></TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;3.3</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312508243346/dex33.htm">Articles of Amendment to the Articles of Incorporation of Unitil Corporation filed on September<U></U>&nbsp;23, 2008</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Exhibit 3.3 to the Registrant&#146;s Registration Statement on Form <FONT STYLE="white-space:nowrap">S-3/A</FONT> <FONT STYLE="white-space:nowrap">No.&nbsp;333-152823</FONT> dated November&nbsp;25, 2008.</TD></TR>
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<TD HEIGHT="8" COLSPAN="2"></TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;3.4</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312514024338/d665250dex44.htm">Articles of Amendment to the Articles of Incorporation of Unitil Corporation filed on April<U></U>&nbsp;27, 2011</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Exhibit 4.4 to the Registrant&#146;s Post-Effective Amendment No.&nbsp;1 to Registration Statement on Form <FONT STYLE="white-space:nowrap">S-3/A</FONT> <FONT STYLE="white-space:nowrap">No.&nbsp;333-</FONT> 168394 dated
January&nbsp;28, 2014.</TD></TR>
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<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;3.5</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312520133859/d893477dex31.htm">Fourth Amended and Restated <FONT STYLE="white-space:nowrap">By-Laws</FONT> of Unitil Corporation</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Exhibit 3.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated April&nbsp;29, 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858).</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.1</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000095017024053926/utl-ex10_1.htm">Unitil Corporation Third Amended and Restated 2003 Stock Plan</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Exhibit 10.1 to Form <FONT STYLE="white-space:nowrap">10-Q</FONT> for March&nbsp;31, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.2</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312512462871/d434549dex47.htm">Form of Restricted Stock Unit Agreement</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Exhibit 4.7 to Form <FONT STYLE="white-space:nowrap">S-8</FONT> Registration Statement dated November&nbsp;9, 2012 (SEC File No. <FONT STYLE="white-space:nowrap">No.&nbsp;333-184849)</FONT></TD></TR>
</TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">3 </P>

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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.3</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312512462871/d434549dex48.htm">Form of Restricted Stock Agreement</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.8 to Form <FONT STYLE="white-space:nowrap">S-8</FONT> Registration Statement dated November&nbsp;9, 2012 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;333-184849)</FONT></TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.4</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312523019155/d496495dex101.htm">Form of Restricted Stock Agreement (Time Vesting)</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 10.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated January&nbsp;24, 2023 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.5</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312523019155/d496495dex102.htm">Form of Restricted Stock Agreement (Performance Vesting)</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 10.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated January&nbsp;24, 2023 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.6</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000089808003000149/ex41.txt">Twelfth Supplemental Indenture of Unitil Energy Systems, Inc., successor to Concord Electric Company, dated as of December&nbsp;
2, 2002, amending and restating the Concord Electric Company Indenture of Mortgage and Deed of Trust dated as of July&nbsp;15, 1958. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">10-K</FONT> for 2002 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.7</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/0000755001-99-000008.txt">Fitchburg Note Agreement dated January&nbsp;15, 1999 for the 7.37% Notes due January&nbsp;15, 2029. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.25 to Form <FONT STYLE="white-space:nowrap">10-K</FONT> for 1999 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.8</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000075500101500013/fgenote.htm">Fitchburg Note Agreement dated June&nbsp;1, 2001 for the 7.98% Notes due June&nbsp;1, 2031. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.6 to Form <FONT STYLE="white-space:nowrap">10-Q</FONT> for June&nbsp;30, 2001 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.9</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Fitchburg Note Agreement dated December&nbsp;21, 2005 for the 5.90% Notes due December&nbsp;15, 2030.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">(2)</TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.10</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Thirteenth Supplemental Indenture of Unitil Energy Systems, Inc., dated as of September&nbsp;26, 2006.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">(2)</TD></TR>
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<TD HEIGHT="8" COLSPAN="2"></TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.11</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312508247687/dex41.htm">Northern Utilities Note Purchase Agreement, dated as of December<U></U>&nbsp;3, 2008, for the 6.95% Senior Notes, Series A due December<U></U>&nbsp;
3, 2018 and the 7.72% Senior Notes, Series B due December<U></U>&nbsp;3, 2038. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated December&nbsp;3, 2008 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
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<TD HEIGHT="8" COLSPAN="2"></TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.12</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312510050262/dex44.htm">Fourteenth Supplemental Indenture of Unitil Energy Systems, Inc., dated as of March<U></U>&nbsp;2, 2010.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.4 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated March&nbsp;2, 2010 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.13</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312514373281/d805762dex41.htm">Northern Utilities form of Note Purchase Agreement, dated as of October<U></U>&nbsp;
15, 2014, for the 4.42% Senior Notes, due October<U></U>&nbsp;15, 2044. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated October&nbsp;15, 2014 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
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<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
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<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.14</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312514373281/d805762dex42.htm">Northern Utilities form of Note issued pursuant to the Note Purchase Agreement, dated as of October<U></U>&nbsp;
15, 2014, for the 4.42% Senior Notes, due October<U></U>&nbsp;15, 2044. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated October&nbsp;15, 2014 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.15</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312516668358/d233875dex41.htm">Note Purchase Agreement dated August<U></U>&nbsp;
1, 2016 by and among Unitil Corporation and the several purchasers named therein for the 3.70% Senior Notes, Series 2016, due August<U></U>&nbsp;1, 2026</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated August&nbsp;1, 2016 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">4 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>

<TD></TD>

<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="46%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="45%"></TD></TR>

<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.16</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312516668358/d233875dex42.htm">3.70% Senior Note, Series 2016, dated as of August<U></U>&nbsp;
1, 2016 purchased by Metropolitan Life Insurance Company in the principal amount of $11,200,000</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated August&nbsp;1, 2016 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.17</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312516668358/d233875dex43.htm">3.70% Senior Note, Series 2016, dated as of August<U></U>&nbsp;
1, 2016 purchased by Lincoln Benefit Life Company in the principal amount of $4,000,000</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.3 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated August&nbsp;1, 2016 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.18</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312516668358/d233875dex44.htm">3.70% Senior Note, Series 2016, dated as of August<U></U>&nbsp;
1, 2016 purchased by Lincoln Benefit Life Company in the principal amount of $3,800,000. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.4 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated August&nbsp;1, 2016 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.19</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312516668358/d233875dex45.htm">3.70% Senior Note, Series 2016, dated as of August<U></U>&nbsp;
1, 2016 purchased by Lincoln Benefit Life Company in the principal amount of $1,000,000</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.5 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated August&nbsp;1, 2016 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.20</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312516668358/d233875dex46.htm">3.70% Senior Note, Series 2016, dated as of August<U></U>&nbsp;
1, 2016 purchased by United of Omaha Life Insurance Company in the principal amount of $5,000,000</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.6 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated August&nbsp;1, 2016 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.21</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312516668358/d233875dex47.htm">3.70% Senior Note, Series 2016, dated as of August<U></U>&nbsp;
1, 2016 purchased by United of Omaha Life Insurance Company in the principal amount of $3,000,000</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.7 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated August&nbsp;1, 2016 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.22</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312516668358/d233875dex48.htm">3.70% Senior Note, Series 2016, dated as of August<U></U>&nbsp;
1, 2016 purchased by Companion Life Insurance Company in the principal amount of $2,000,000. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.8 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated August&nbsp;1, 2016 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.23</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312517231793/d426277dex41.htm">Note Purchase Agreement dated July<U></U>&nbsp;
14, 2017 by and among Northern Utilities, Inc. and the several purchasers named therein for the 3.52% Senior Notes, Series 2017A, due November<U></U>&nbsp;1, 2027 and the 4.32% Senior Notes, Series 2017B, due November<U></U>&nbsp;1, 2047</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated July&nbsp;14, 2017 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.24</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312517231793/d426277dex42.htm">Note Purchase Agreement dated July<U></U>&nbsp;
14, 2017 by and among Fitchburg Gas and Electric Light Company and the several purchasers named therein for the 3.52% Senior Notes, Series 2017A, due November<U></U>&nbsp;1, 2027 and the 4.32% Senior Notes, Series 2017B, due November<U></U>&nbsp;
1, 2047</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated July&nbsp;14, 2017 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.25</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312517231793/d426277dex43.htm">Note Purchase Agreement dated July<U></U>&nbsp;
14, 2017 by and among Granite State Gas Transmission, Inc. and the several purchasers named therein for the 3.72% Senior Notes, Series 2017A, due November<U></U>&nbsp;1, 2027. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.3 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated July&nbsp;14, 2017 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">5 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>

<TD></TD>

<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="45%"></TD>

<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="45%"></TD></TR>

<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.26&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312517331857/d483105dex42.htm">3.52% Senior Note, Series 2017A, due November<U></U>&nbsp;1, 2027, issued by Northern Utilities, Inc. to Great-West Life<U></U>&nbsp;
&amp; Annuity Insurance Company. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated November&nbsp;1, 2017 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.27&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312517331857/d483105dex43.htm">4.32% Senior Note, Series 2017B, due November<U></U>&nbsp;
1, 2047, issued by Northern Utilities, Inc. to The Canada Life Insurance Company of Canada.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.3 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated November&nbsp;1, 2017 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.28&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312517331857/d483105dex45.htm">3.52% Senior Note, Series 2017A, due November<U></U>&nbsp;
1, 2027, issued by Fitchburg Gas and Electric Light Company to Great-West Life<U></U>&nbsp;&amp; Annuity Insurance Company</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.5 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated November&nbsp;1, 2017 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.29&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312517331857/d483105dex46.htm">4.32% Senior Note, Series 2017B, due November<U></U>&nbsp;
1, 2047, issued by Fitchburg Gas and Electric Light Company to The Great-West Life Assurance Company</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.6 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated November&nbsp;1, 2017 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.30&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312517331857/d483105dex48.htm">3.72% Senior Note, Series 2017A, due November<U></U>&nbsp;
1, 2027, issued by Granite State Gas Transmission, Inc. to Thrivent Financial for Lutherans.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.8 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated November&nbsp;1, 2017 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.31</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312518342195/d658724dex41.htm">Bond Purchase Agreement dated November<U></U>&nbsp;
30, 2018 by and among Unitil Energy Systems, Inc. and the several purchasers named therein for the $30,000,000 aggregate principal amount of first mortgage bonds, Series Q, due November<U></U>&nbsp;30, 2048</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated November&nbsp;30, 2018 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.32</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312518342195/d658724dex42.htm">Fifteenth Supplemental Indenture dated November<U></U>&nbsp;
29, 2018 by and between Unitil Energy Systems, Inc. and U.S. Bank National Association (as trustee).</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated November&nbsp;30, 2018 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.33&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312518342195/d658724dex43.htm">First Mortgage Bond, Series Q, 4.18%, due November<U></U>&nbsp;
30, 2048, issued by Unitil Energy Systems, Inc. to United of Omaha Life Insurance Company</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.3 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated November&nbsp;30, 2018 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.34</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312519246867/d747304dex41.htm">Note Purchase Agreement dated September<U></U>&nbsp;
12, 2019 by and among Northern Utilities, Inc. and the several purchasers named therein. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;12, 2019 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.35&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312519246867/d747304dex42.htm">4.04% Senior Note, Series 2019, due September<U></U>&nbsp;12, 2049, issued by Northern Utilities, Inc. to Pacific Life Insurance
Company.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;12, 2019 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">6 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>

<TD></TD>

<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="45%"></TD>

<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="45%"></TD></TR>

<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.36</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312519319815/d120976dex41.htm">Note Purchase Agreement dated December<U></U>&nbsp;18, 2019 by and among Unitil Corporation and the several purchasers named
therein</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated December&nbsp;18, 2019 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.37&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312519319815/d120976dex42.htm">3.43% Senior Note, Series 2019, due December<U></U>&nbsp;18, 2029, issued by Unitil Corporation to CHIMEFISH<U></U>&nbsp;
&amp; CO, as nominee for American Equity Investment Life Insurance Company.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated December&nbsp;18, 2019 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.38</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312520250247/d923021dex41.htm">Note Purchase Agreement dated September<U></U>&nbsp;
15, 2020 by and among Northern Utilities, Inc. and the several purchasers named therein. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;15, 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.39&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312520250247/d923021dex42.htm">3.78% Senior Note, Series 2020, due September<U></U>&nbsp;
15, 2040, issued by Northern Utilities, Inc. to Metropolitan Life Insurance Company.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;15, 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.40</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312520250247/d923021dex43.htm">Note Purchase Agreement dated September<U></U>&nbsp;
15, 2020 by and among Fitchburg Gas and Electric Light Company and the several purchasers named therein. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.3 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;15, 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.41&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312520250247/d923021dex44.htm">3.78% Senior Note, Series 2020A, due September<U></U>&nbsp;
15, 2040, issued by Fitchburg Gas and Electric Light Company to Brighthouse Life Insurance Company of NY.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.4 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;15, 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.42</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312520250247/d923021dex45.htm">Bond Purchase Agreement dated September<U></U>&nbsp;
15, 2020 by and among Unitil Energy Systems, Inc., U.S. Bank National Association (as trustee), and the several purchasers named therein.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.5 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;15, 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.43</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312520250247/d923021dex46.htm">Sixteenth Supplemental Indenture dated September<U></U>&nbsp;
15, 2020 by and between Unitil Energy Systems, Inc. and U.S. Bank National Association (as trustee).</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.6 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;15, 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.44&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312520250247/d923021dex47.htm">First Mortgage Bond, Series R, 3.58%, due September<U></U>&nbsp;
15, 2040, issued by Unitil Energy Systems, Inc. to CUDD and CO (as nominee for Symetra Life Insurance Company).</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.7 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;15, 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.45</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312518233218/d590783dex42.htm">Amended and Restated Note issued to Bank of America, N.A. </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated July&nbsp;25, 2018 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.46</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312521025264/d67774dex448.htm">Loan Agreement dated December<U></U>&nbsp;18, 2020 between Unitil Realty Corp. and TD Bank, N.A.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.48 to Form <FONT STYLE="white-space:nowrap">10-K</FONT> for 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.47</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312521025264/d67774dex449.htm">Mortgage and Security Agreement dated December<U></U>&nbsp;18, 2020 between Unitil Realty Corp. and TD Bank, N.A</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.49 to Form <FONT STYLE="white-space:nowrap">10-K</FONT> for 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">7 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>

<TD></TD>

<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="45%"></TD>

<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="45%"></TD></TR>

<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.48</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312521025264/d67774dex450.htm">Mortgage Loan Note dated December<U></U>&nbsp;18, 2020 issued to TD Bank, N.A</A>.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.50 to Form <FONT STYLE="white-space:nowrap">10-K</FONT> for 2020 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.49</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312522023936/d276476dex450.htm">Description of Registrant&#146;s Securities</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.50 to Form <FONT STYLE="white-space:nowrap">10-K</FONT> for 2021 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.50&nbsp;(4)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312522258202/d325396dex41.htm">Third Amended and Restated Credit Agreement dated September<U></U>&nbsp;
29, 2022 among Unitil Corporation, Bank of America, N.A., as administrative agent, and the Lenders</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;29, 2022 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.51</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524181278/d869738dex41.htm">First Amendment to Third Amended and Restated Credit Agreement between Unitil and Bank of America, N.A., as administrative agent, dated July<U>
</U>&nbsp;18, 2024</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for July&nbsp;18, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.52</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312522258202/d325396dex42.htm">Second Amended and Restated Note issued to Citizens Bank, N.A.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;29, 2022 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.53</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312522258202/d325396dex43.htm">Second Amended and Restated Note issued to TD Bank, N.A.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.3 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated September&nbsp;29, 2022 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;001-08858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.54&nbsp;(4)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex411.htm">Bond Purchase Agreement dated August<U></U>&nbsp;
21, 2024 by and among Unitil Energy Systems, Inc., U.S. Bank Trust Company, National Association (as trustee) and the several purchasers named therein.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.11 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.55</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex412.htm">Seventeenth Supplemental Indenture dated August<U></U>&nbsp;
21, 2024 by and between Unitil Energy Systems, Inc. and U.S. Bank Trust Company, National Association (as trustee)</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.12 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.56&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex413.htm">First Mortgage Bond, Series S, 5.69%, due August<U></U>&nbsp;
21, 2054, issued by Unitil Energy Systems, Inc. to Metlife Reinsurance Company of Hamilton, Ltd.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.13 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.57&nbsp;(4)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312523185358/d431329dex41.htm">Note Purchase Agreement dated July&nbsp;
6, 2023 by and among Fitchburg Gas and Electric Light Company and the several purchasers named therein.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated July&nbsp;6, 2023 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.58&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312523185358/d431329dex42.htm">5.70% Senior Note, Series 2023A, due July&nbsp;
2, 2033, issued by Fitchburg Gas and Electric Light Company to MetLife Reinsurance Company of Hamilton, Ltd.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated July&nbsp;6, 2023 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.59&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312523185358/d431329dex43.htm">5.96% Senior Note, Series 2023B, due July&nbsp;
2, 2053, issued by Fitchburg Gas and Electric Light Company to Mutual of Omaha Insurance Company</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.3 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> dated July&nbsp;6, 2023 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">8 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>

<TD></TD>

<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="45%"></TD>

<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="45%"></TD></TR>

<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.60&nbsp;(4)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex41.htm">Note Purchase Agreement dated August<U></U>&nbsp;21, 2024 by and among Unitil Corporation and the several purchasers named therein.</A></TD>

<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.1 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.61&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex42.htm">5.99% Senior Note, Series 2024, due August<U></U>&nbsp;21, 2034, issued by Unitil Corporation to Metropolitan Tower Life Insurance
Company</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.2 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.62&nbsp;(4)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex43.htm">Note Purchase Agreement dated August<U></U>&nbsp;21, 2024 by and among Northern Utilities, Inc. and the several purchasers named
therein.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.3 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.63&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex44.htm">5.54% Senior Note, Series 2024A, due August<U></U>&nbsp;21, 2034, issued by Northern Utilities, Inc. to Metropolitan Life Insurance
Company</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.4 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.64&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex45.htm">5.74% Senior Note, Series 2024B, due August<U></U>&nbsp;21, 2039, issued by Northern Utilities, Inc.to Modern Woodmen of America.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.5 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.65&nbsp;(4)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex46.htm">Note Purchase Agreement dated August<U></U>&nbsp;
21, 2024 by and among Fitchburg Gas and Electric Light Company and the several purchasers named therein</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.6 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.66&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex47.htm">5.54% Senior Note, Series 2024A, due August<U></U>&nbsp;
21, 2034, issued by Fitchburg Gas and Electric Light Company to Metlife Reinsurance Company of Hamilton, Ltd.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.7 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.67&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex48.htm">5.99% Senior Note, Series 2024B, due August<U></U>&nbsp;
21, 2044, issued by Fitchburg Gas and Electric Light Company to Metlife Reinsurance Company of Hamilton, Ltd.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.8 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.68&nbsp;(4)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex49.htm">Note Purchase Agreement dated August<U></U>&nbsp;
21, 2024 by and among Granite State Gas Transmission, Inc. and the several purchasers named therein.</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.9 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;4.69&nbsp;(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="http://www.sec.gov/Archives/edgar/data/755001/000119312524207775/d227567dex410.htm">5.74% Senior Note, Series 2024, due August<U></U>&nbsp;
21, 2034, issued by Granite State Gas Transmission, Inc. to Metropolitan Life Insurance Company</A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Exhibit 4.10 to Form <FONT STYLE="white-space:nowrap">8-K</FONT> for August&nbsp;21, 2024 (SEC File <FONT STYLE="white-space:nowrap">No.&nbsp;1-8858)</FONT></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;&#8199;5.1</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="d918508dex51.htm">Opinion of Patrick Taylor </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Filed herewith.</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;23.1</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="d918508dex51.htm">Consent of Patrick Taylor </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Included in Exhibit 5.1.</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;23.2</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="d918508dex232.htm">Consent of Deloitte&nbsp;&amp; Touche LLP </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Filed herewith.</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>&#8199;24.1</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="d918508ds8.htm#sig">Powers of Attorney </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Filed herewith (included on the signature pages of this registration statement).</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" NOWRAP>107</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"><A HREF="d918508dexfilingfees.htm">Filing Fee Exhibit </A></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Filed herewith.</TD></TR>
</TABLE> <P STYLE="line-height:8.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000;width:11%">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(1)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">The exhibits referred to in this column by specific designations and dates have heretofore been filed with or
furnished to the Securities and Exchange Commission under such designations and are hereby incorporated by reference. </P></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">9 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(2)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">In accordance with Item 601(b)(4)(iii)(A) of Regulation <FONT STYLE="white-space:nowrap">S-K,</FONT> the
instrument defining the debt of the Registrant and its subsidiary, described above, has been omitted but will be furnished to the Commission upon request. </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(3)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">This Note or Bond (each, an &#147;Instrument&#148;) is substantially identical in all material respects to
other Instruments that are otherwise required to be filed as exhibits, except as to the registered payee of such Instrument, the identifying number of such Instrument, and the principal amount of such Instrument. In accordance with instruction no. 2
to Item 601 of Regulation <FONT STYLE="white-space:nowrap">S-K,</FONT> the registrant has filed a copy of only one of such Instruments, with a schedule identifying the other Instruments omitted and setting forth the material details in which such
Instruments differ from the Instrument that was filed. The registrant acknowledges that the Securities and Exchange Commission may at any time in its discretion require filing of copies of any Instruments so omitted. </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(4)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">In accordance with Item 601(a)(5) of Regulation <FONT STYLE="white-space:nowrap">S-K,</FONT> this exhibit omits
certain schedules and exhibits. This exhibit&#146;s table of contents includes a brief description of the subject matter of all of its schedules and exhibits, including the omitted schedules and exhibits. The Registrant acknowledges that it must
provide a copy of any omitted schedules or exhibits to the Securities and Exchange Commission or its staff upon request. </P></TD></TR></TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(P) Paper
exhibit. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Item&#8201;9. Undertakings </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(a) The
undersigned registrant hereby undertakes: </P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this
registration statement: </P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(i) To include any prospectus required by section 10(a)(3) of the Securities Act of 1933; </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective
amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the
total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to
Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the &#147;Calculation of Registration Fee&#148; table in the effective registration statement;
</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(iii) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material
change to such information in the registration statement; </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>Provided, however, </I>That paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the
registration statement is on Form <FONT STYLE="white-space:nowrap">S-8</FONT> and the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Securities and
Exchange Commission by the registrant pursuant to section 13 or section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the registration statement. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">10 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(2) That, for the purpose of determining any liability under the Securities Act of 1933, each such
post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial <I>bona fide</I> offering thereof. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the
offering. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(b) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing
of the registrant&#146;s annual report pursuant to section 13(a) or section 15(d) of the Securities Exchange Act of 1934 that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to
the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial <I>bona fide</I> offering thereof. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(h)
Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised
that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than
the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification
by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">11 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><A NAME="sig"></A>SIGNATURES AND POWER OF ATTORNEY </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form <FONT STYLE="white-space:nowrap">S-8</FONT> and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the Town of Hampton, State of New
Hampshire, on this 21<SUP STYLE="font-size:75%; vertical-align:top">st</SUP> day of January, 2025. </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="40%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt">


<TR>

<TD WIDTH="7%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="92%"></TD></TR>


<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" COLSPAN="3">UNITIL CORPORATION</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom" STYLE=" BORDER-BOTTOM:1px solid #000000">&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-BOTTOM:1px solid #000000">/s/ Daniel J. Hurstak</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Daniel J. Hurstak</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Senior Vice President, Chief Financial Officer and Treasurer</TD></TR>
</TABLE></DIV> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>KNOW ALL MEN BY THESE PRESENTS</B>, that each person whose signature appears below constitutes and appoints Thomas P.
Meissner, Jr. and Daniel J. Hurstak and each of them, his or her true and lawful <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">attorney-in-fact</FONT></FONT> and agent, with full power of substitution and resubstitution, from
such person and in each person&#146;s name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to the registration statement and any registration statement relating to this registration
statement under Rule 462 and to file the same, with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said
<FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">attorney-in-fact</FONT></FONT> and agent, full power and authority to do and perform each and every act and thing requisite and necessary to be done as fully to all intents and
purposes as he or she might or could do in person, hereby ratifying and confirming all that said <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">attorney-in-fact</FONT></FONT> and agent, or any of them, may lawfully do or cause to
be done by virtue hereof. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statement has been signed by the
following persons in the capacities and on the dates indicated. </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt">


<TR>

<TD WIDTH="38%"></TD>

<TD VALIGN="bottom"></TD>
<TD WIDTH="44%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="16%"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="bottom" NOWRAP ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center">Signature</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center">Title</P></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman" ALIGN="center">Date</P></TD></TR>


<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Thomas P. Meissner, Jr.</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director, Chairman of the Board and Chief Executive Officer (Principal Executive Officer)</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Thomas P. Meissner, Jr.</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Daniel J. Hurstak</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Senior Vice President, Chief Financial Officer and Treasurer (Principal Financial Officer)</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Daniel J. Hurstak</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Todd R. Diggins</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Chief Accounting Officer&nbsp;&amp; Controller</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">(Principal Accounting Officer)</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Todd R. Diggins</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Anne L. Alonzo</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Anne L. Alonzo</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Neveen F. Awad</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Neveen F. Awad</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Winfield S. Brown</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Winfield S. Brown</TD></TR>
</TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">12 </P>

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<TR>

<TD WIDTH="38%"></TD>

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<TD WIDTH="44%"></TD>

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<TD WIDTH="16%"></TD></TR>


<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Mark H. Collin</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Mark H. Collin</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Suzanne Foster</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Suzanne Foster</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Edward F. Godfrey</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Edward F. Godfrey</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Michael B. Green</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Michael B. Green</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Jane Lewis-Raymond</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Jane Lewis-Raymond</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ Justine Vogel</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">Justine Vogel</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman" ALIGN="center">/s/ David A. Whiteley</P></TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" ALIGN="center">Director</TD>
<TD VALIGN="bottom" ROWSPAN="2">&nbsp;</TD>
<TD VALIGN="top" ROWSPAN="2" NOWRAP ALIGN="center">January&nbsp;21, 2025</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom" ALIGN="center">David A. Whiteley</TD></TR>
</TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">13 </P>

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<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>d918508dex51.htm
<DESCRIPTION>EX-5.1
<TEXT>
<HTML><HEAD>
<TITLE>EX-5.1</TITLE>
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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 5.1 </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt;margin-bottom:0pt">


<IMG SRC="g918508g67w77.jpg" ALT="LOGO">
 </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">January&nbsp;21, 2025 </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Unitil Corporation </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">6 Liberty Lane West </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Hampton, New Hampshire 03842-1720 </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><U>Re:</U>
<U>Unitil Corporation&#151;Registration Statement on <FONT STYLE="white-space:nowrap">Form&nbsp;S-8</FONT></U> </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Ladies and Gentlemen: </P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">I am Chief Regulatory Counsel for Unitil Service Corp. In my capacity as Chief Regulatory Counsel, I advise and represent Unitil Corporation
(the &#147;<I>Company</I>&#148;) and its regulated subsidiaries in a broad range of corporate, business and regulatory matters. As a result, I have current knowledge of the legal activities of the Company. I have served in such capacity in
connection with the filing by the Company with the U.S. Securities and Exchange Commission (the &#147;<I>Commission</I>&#148;) of a registration statement on <FONT STYLE="white-space:nowrap">Form&nbsp;S-8&nbsp;filed</FONT> on the date hereof (the
&#147;<I>Registration Statement</I>&#148;) under the Securities Act of 1933, as amended (the &#147;<I>Act</I>&#148;), for the registration of 350,000 shares of common stock, no par value, of the Company (the &#147;<I>Shares</I>&#148;) to be issued
pursuant to the Unitil Corporation Third Amended and Restated 2003 Stock Plan (the &#147;<I>Plan</I>&#148;). </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">In my capacity as Chief
Regulatory Counsel, I am generally familiar with the proceedings taken and proposed to be taken by the Company in connection with the authorization and issuance of the Shares. In rendering the opinion set forth herein, I have examined, am familiar
with, and relied on originals or copies, certified or otherwise identified to my satisfaction, of such documents, corporate records, certificates of officers of the Company and of public officials and such other instruments as I have deemed
necessary or appropriate as a basis for the opinion expressed below, including (i)&nbsp;the Registration Statement, (ii)&nbsp;the Articles of Incorporation of the Company, as amended, as certified by the Secretary of State of the State of New
Hampshire, <FONT STYLE="white-space:nowrap">(iii)&nbsp;the&nbsp;By-Laws&nbsp;of</FONT> the Company, as amended, certified to me by the Secretary of the Company to be true, correct, and complete as of the date hereof, and (iv)&nbsp;certain
resolutions of the Board of Directors of the Company relating to the Shares and related matters. In addition, I have examined originals (or copies certified or otherwise identified to my satisfaction) of such other agreements, instruments,
certificates, documents and records and have reviewed such questions of law, and made such inquiries, as I have deemed necessary or appropriate for the purposes of the opinion rendered herein. In my examination, I have assumed the genuineness of all
signatures and the conformity to original documents of all copies submitted to me. I have also assumed the regularity of the Company&#146;s corporate proceedings. As to various questions of fact material to the opinion, I have relied on statements
and certificates of officers and representatives of the Company and public officials. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">www.unitil.com </P>

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<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

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 <P STYLE="margin-top:0pt;margin-bottom:0pt">


<IMG SRC="g918508g67w77.jpg" ALT="LOGO">
 </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Based upon and subject to the foregoing, and subject to the limitations set forth below, I am of the
opinion that the Shares will be validly issued, fully paid and <FONT STYLE="white-space:nowrap">non-assessable</FONT> when: </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">the Registration Statement shall have become, and for so long as it shall remain, effective for the purpose of
the issuance and sale of the Shares; and </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">issued pursuant to and in accordance with the Plan and any applicable award agreements. </P></TD></TR></TABLE>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">In rendering the foregoing opinion, I express no opinion as to any laws other than the New Hampshire Business Corporation Act. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">I consent to the filing of this opinion as an exhibit to the Registration Statement and to the reference to me under the heading
&#147;Interests of Named Experts and Counsel&#148; in the Registration Statement. In giving such consent, I do not hereby admit that I am in the category of persons whose consent is required under Section&nbsp;7 of the Act or the rules and
regulations of the Commission. </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="40%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt">


<TR>

<TD WIDTH="100%"></TD></TR>


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<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Very truly yours,</P></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-BOTTOM:1px solid #000000">/s/ Patrick H. Taylor</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Patrick H. Taylor</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Chief Regulatory Counsel</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Unitil Service Corp.</P></TD></TR>
</TABLE></DIV> <P STYLE="font-size:12pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">www.unitil.com </P>

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</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>3
<FILENAME>d918508dex232.htm
<DESCRIPTION>EX-23.2
<TEXT>
<HTML><HEAD>
<TITLE>EX-23.2</TITLE>
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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 23.2 </B></P>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">We consent to the incorporation by reference in this Registration Statement on Form <FONT STYLE="white-space:nowrap">S-8</FONT> of our report dated
February&nbsp;13, 2024, relating to the consolidated financial statements of Unitil Corporation and subsidiaries and the effectiveness of Unitil Corporation&#146;s internal control over financial reporting, appearing in the Annual Report on Form <FONT
STYLE="white-space:nowrap">10-K</FONT> of Unitil Corporation for the year ended December&nbsp;31, 2023. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>/s/ </I>Deloitte &amp; Touche LLP </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Boston, MA </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">January 21, 2025 </P>
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<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-RIGHT:0.75pt solid #000000; padding-right:2pt;vertical-align:bottom">&#160;</td></tr>
<tr style="font-size:1pt">
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<tr style="font-size:1pt">
<td style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; padding-left:8pt;height:0.75pt">&#160;</td>
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<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; BORDER-RIGHT:0.75pt solid #000000;height:0.75pt">&#160;</td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
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<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">&#8212;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-RIGHT:0.75pt solid #000000; padding-right:2pt;vertical-align:bottom">&#160;</td></tr>
<tr style="font-size:1pt">
<td style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; padding-left:8pt;height:0.75pt">&#160;</td>
<td colspan="8" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; BORDER-RIGHT:0.75pt solid #000000;height:0.75pt">&#160;</td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="BORDER-LEFT:0.75pt solid #000000; padding-left:8pt;vertical-align:bottom">&#160;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td colspan="7" style="padding-bottom:1pt ;vertical-align:bottom;text-align:right"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bold;display:inline;">Total Offering Amounts&#8201;</div></div></td>
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<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">$<ix:nonFraction name="ffd:TtlOfferingAmt" contextRef="P01_21_2025To01_21_2025" unitRef="Unit_USD" decimals="0" scale="0" format="ixt:num-dot-decimal" id="ixv-463">19,008,500</ix:nonFraction></td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center">$<ix:nonFraction name="ffd:TtlFeeAmt" contextRef="P01_21_2025To01_21_2025" unitRef="Unit_USD" decimals="2" scale="0" format="ixt:num-dot-decimal" id="ixv-464">2,910.20</ix:nonFraction></td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-RIGHT:0.75pt solid #000000; padding-right:2pt;vertical-align:bottom">&#160;</td></tr>
<tr style="font-size:1pt">
<td style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; padding-left:8pt;height:0.75pt">&#160;</td>
<td colspan="8" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; BORDER-RIGHT:0.75pt solid #000000;height:0.75pt">&#160;</td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="BORDER-LEFT:0.75pt solid #000000; padding-left:8pt;vertical-align:bottom">&#160;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td colspan="7" style="padding-bottom:1pt ;vertical-align:bottom;text-align:right"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bold;display:inline;">Total Fees Previously Paid&#8201;</div></div></td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center"><ix:nonFraction name="ffd:TtlPrevslyPdAmt" contextRef="P01_21_2025To01_21_2025" unitRef="Unit_USD" decimals="0" scale="0" format="ixt:fixed-zero" id="ixv-465">&#8212;</ix:nonFraction></td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-RIGHT:0.75pt solid #000000; padding-right:2pt;vertical-align:bottom">&#160;</td></tr>
<tr style="font-size:1pt">
<td style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; padding-left:8pt;height:0.75pt">&#160;</td>
<td colspan="8" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; BORDER-RIGHT:0.75pt solid #000000;height:0.75pt">&#160;</td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="BORDER-LEFT:0.75pt solid #000000; padding-left:8pt;vertical-align:bottom">&#160;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td colspan="7" style="padding-bottom:1pt ;vertical-align:bottom;text-align:right"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bold;display:inline;">Total Fee Offsets&#8201;</div></div></td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;vertical-align:bottom;text-align:center"><ix:nonFraction name="ffd:TtlOffsetAmt" contextRef="P01_21_2025To01_21_2025" unitRef="Unit_USD" decimals="0" scale="0" format="ixt:fixed-zero" id="ixv-466">&#8212;</ix:nonFraction></td>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style=" BORDER-LEFT:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-RIGHT:0.75pt solid #000000; padding-right:2pt;vertical-align:bottom">&#160;</td></tr>
<tr style="font-size:1pt">
<td style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; padding-left:8pt;height:0.75pt">&#160;</td>
<td colspan="8" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000;height:0.75pt">&#160;</td>
<td colspan="2" style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; BORDER-RIGHT:0.75pt solid #000000;height:0.75pt">&#160;</td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="BORDER-LEFT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000; padding-left:8pt;vertical-align:bottom">&#160;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td colspan="7" style="padding-bottom:1pt ;BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom;text-align:right"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bold;display:inline;">Net Fee Due&#8201;</div></div></td>
<td style=" BORDER-LEFT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="padding-bottom:1pt ;BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom;text-align:center">$<ix:nonFraction name="ffd:NetFeeAmt" contextRef="P01_21_2025To01_21_2025" unitRef="Unit_USD" decimals="2" scale="0" format="ixt:num-dot-decimal" id="ixv-467">2,910.20</ix:nonFraction></td>
<td style=" BORDER-LEFT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style=" BORDER-LEFT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000;vertical-align:bottom">&#160;</td>
<td style="BORDER-RIGHT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000; padding-right:2pt;vertical-align:bottom">&#160;</td></tr></table><div style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</div><ix:nonNumeric name="ffd:OfferingNote" contextRef="P01_21_2025To01_21_2025_1TypedMemberffdOfferingAxis" escape="true" id="ixv-406">
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border:0;width:100%">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left">(1)</td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; text-align: left; line-height: normal;">Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the &#8220;<div style="text-decoration: underline; letter-spacing: 0px; top: 0px;display:inline;">Securities Act</div>&#8221;), this registration statement also covers any additional securities that may be offered or issued in connection with any stock split, stock dividend or similar transaction. </div></td></tr></table>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border:0;width:100%">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left">(2)</td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; text-align: left; line-height: normal;">Calculated pursuant to Rule 457(c) of the Securities Act, based on the average high and low prices reported on the New York Stock Exchange under the symbol &#8220;UTL&#8221; on January&#160;16, 2025, which is within five (5)&#160;business days of the filing hereof. </div></td></tr></table></ix:nonNumeric>
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<td style="width:4%;vertical-align:top;text-align:left">*</td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; text-align: left; line-height: normal;">Table 2: Fee Offset Claims and Sources and Table 3:Combined Prospectuses omitted as inapplicable. </div></td></tr></table></div></div></div></div></div>
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<span style="display: none;">v3.24.4</span><table class="report" border="0" cellspacing="2" id="idm45586495723872">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Submission<br></strong></div></th>
<th class="th"><div>Jan. 21, 2025</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_SubmissionLineItems', window );"><strong>Submission [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Central Index Key</a></td>
<td class="text">0000755001<span></span>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Registrant Name</a></td>
<td class="text">Unitil Corporation<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FormTp', window );">Form Type</a></td>
<td class="text">S-8<span></span>
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<td class="text">S-8<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FeeExhibitTp', window );">Fee Exhibit Type</a></td>
<td class="text">EX-FILING FEES<span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<DESCRIPTION>IDEA: XBRL DOCUMENT
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<span style="display: none;">v3.24.4</span><table class="report" border="0" cellspacing="2" id="idm45586494579920">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Offerings - Offering: 1<br></strong></div></th>
<th class="th">
<div>Jan. 21, 2025 </div>
<div>USD ($) </div>
<div>shares</div>
</th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_OfferingTable', window );"><strong>Offering:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_PrevslyPdFlg', window );">Fee Previously Paid</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FeesOthrRuleFlg', window );">Other Rule</a></td>
<td class="text">true<span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_OfferingSctyTp', window );">Security Type</a></td>
<td class="text">Equity<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_OfferingSctyTitl', window );">Security Class Title</a></td>
<td class="text">Common Stock<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_AmtSctiesRegd', window );">Amount Registered | shares</a></td>
<td class="nump">350,000<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_MaxOfferingPricPerScty', window );">Proposed Maximum Offering Price per Unit</a></td>
<td class="nump">54.31<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_MaxAggtOfferingPric', window );">Maximum Aggregate Offering Price</a></td>
<td class="nump">$ 19,008,500<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FeeRate', window );">Fee Rate</a></td>
<td class="nump">0.01531%<span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FeeAmt', window );">Amount of Registration Fee</a></td>
<td class="nump">$ 2,910.2<span></span>
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</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_OfferingNote', window );">Offering Note</a></td>
<td class="text">
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border:0;width:100%">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left">(1)</td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; text-align: left; line-height: normal;">Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the &#8220;<div style="text-decoration: underline; letter-spacing: 0px; top: 0px;display:inline;">Securities Act</div>&#8221;), this registration statement also covers any additional securities that may be offered or issued in connection with any stock split, stock dividend or similar transaction. </div></td></tr></table>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border:0;width:100%">
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<td style="width:4%;vertical-align:top;text-align:left">(2)</td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; text-align: left; line-height: normal;">Calculated pursuant to Rule 457(c) of the Securities Act, based on the average high and low prices reported on the New York Stock Exchange under the symbol &#8220;UTL&#8221; on January&#160;16, 2025, which is within five (5)&#160;business days of the filing hereof. </div></td></tr></table><span></span>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The amount of securities being registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_AmtSctiesRegd</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Total amount of registration fee (amount due after offsets).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The rate per dollar of fees that public companies and other issuers pay to register their securities with the Commission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Checkbox indicating whether filer is using a rule other than 457(a), 457(o), or 457(f) to calculate the registration fee due.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<td>duration</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The maximum aggregate offering price for the offering that is being registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_MaxAggtOfferingPric</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The maximum offering price per share/unit being registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_MaxOfferingPricPerScty</td>
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<td>duration</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The title of the class of securities being registered (for each class being registered).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_OfferingSctyTitl</td>
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<td><strong> Balance Type:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Type of securities: "Asset-backed Securities", "ADRs/ADSs", "Debt", "Debt Convertible into Equity", "Equity", "Face Amount Certificates", "Limited Partnership Interests", "Mortgage Backed Securities", "Non-Convertible Debt", "Unallocated (Universal) Shelf", "Exchange Traded Vehicle Securities", "Other"</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_OfferingSctyTp</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>ffd_</td>
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<td><strong> Data Type:</strong></td>
<td>ffd:securityTypeItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_OfferingTable</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>ffd_</td>
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<td><strong> Data Type:</strong></td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
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<span style="display: none;">v3.24.4</span><table class="report" border="0" cellspacing="2" id="idm45586494518320">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Fees Summary<br></strong></div></th>
<th class="th">
<div>Jan. 21, 2025 </div>
<div>USD ($)</div>
</th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FeesSummaryLineItems', window );"><strong>Fees Summary [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_TtlOfferingAmt', window );">Total Offering</a></td>
<td class="nump">$ 19,008,500<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_TtlPrevslyPdAmt', window );">Previously Paid Amount</a></td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_TtlFeeAmt', window );">Total Fee Amount</a></td>
<td class="nump">2,910.2<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_TtlOffsetAmt', window );">Total Offset Amount</a></td>
<td class="nump">0<span></span>
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</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_NetFeeAmt', window );">Net Fee</a></td>
<td class="nump">$ 2,910.2<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_ffd_FeesSummaryLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_FeesSummaryLineItems</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_NetFeeAmt</td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<td style="white-space:nowrap;">ffd_TtlFeeAmt</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_TtlOfferingAmt</td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_TtlPrevslyPdAmt</td>
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