<SEC-DOCUMENT>0001683168-17-000856.txt : 20170407
<SEC-HEADER>0001683168-17-000856.hdr.sgml : 20170407
<ACCEPTANCE-DATETIME>20170407171128
ACCESSION NUMBER:		0001683168-17-000856
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20170407
DATE AS OF CHANGE:		20170407
GROUP MEMBERS:		HAL M. BRIAND
GROUP MEMBERS:		MATTHEW T. MOROUN

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PAM TRANSPORTATION SERVICES INC
		CENTRAL INDEX KEY:			0000798287
		STANDARD INDUSTRIAL CLASSIFICATION:	TRUCKING (NO LOCAL) [4213]
		IRS NUMBER:				710633135
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-39193
		FILM NUMBER:		17750717

	BUSINESS ADDRESS:	
		STREET 1:		297 WEST HENRI DE TONTI BLVD
		CITY:			TONTITOWN
		STATE:			AR
		ZIP:			72770
		BUSINESS PHONE:		4793619111

	MAIL ADDRESS:	
		STREET 1:		297 WEST HENRI DE TONTI BLVD
		CITY:			TONTITOWN
		STATE:			AR
		ZIP:			72770

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MOROUN MATTHEW T
		CENTRAL INDEX KEY:			0001030743
		STATE OF INCORPORATION:			MI
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	MAIL ADDRESS:	
		STREET 1:		12225 STEPHENS ROAD
		CITY:			WARREN
		STATE:			MI
		ZIP:			48089
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>pam_13da8.htm
<DESCRIPTION>AMENDMENT NO. 8
<TEXT>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B><BR>
<B>Washington, D.C. 20549</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>SCHEDULE 13D/A</B><BR>
<B>Under the Securities Exchange Act of 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Amendment No. 8)*</B></P>

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

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">P.A.M. TRANSPORTATION SERVICES,
INC.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Name of Issuer)</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>COMMON STOCK, PAR VALUE $0.01 PER SHARE</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">(Title of Class of Securities)</P>

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

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">693149-10-6</P>

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

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

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

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">MATTHEW T. MOROUN</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">12225 STEPHENS ROAD</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">WARREN, MI 48089</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(586) 939-7000</P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="text-transform: uppercase"><B>Edwin
J. Lukas</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="text-transform: uppercase"><B>CenTra,
Inc.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="text-transform: uppercase"><B>12225
Stephens Road</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>WARREN, MI 48089</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(586) 939-7000</B></P>

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

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

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Name, Address and Telephone Number of
Person Authorized<BR>
to Receive Notices and Communications)</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">March 31, 2017</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Date of Event which Requires Filing of
this Statement)</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-size: 10pt">If the filing person has previously
filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule
because of Rules 13d-1(e), 13d-1(f) or 13d-1(g), check the following box. </FONT>[_]</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>Note</B>: Schedules filed in paper format shall include a
signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to
be sent.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">* The remainder of this cover page shall be filled out for a
reporting person&rsquo;s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment
containing information which would alter disclosures provided in a prior cover page.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The information required on the remainder of this cover page
shall not be deemed to be &ldquo;filed&rdquo; for the purpose of Section 18 of the Securities Exchange Act of 1934 (&ldquo;Act&rdquo;)
or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however,
see the Notes).</P>

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

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

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

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

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

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

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

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

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

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

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

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    <TD STYLE="width: 33%">CUSIP No. 693149-10-6</TD>
    <TD STYLE="width: 34%; text-align: center">SCHEDULE 13D/A</TD>
    <TD STYLE="width: 33%">&nbsp;</TD></TR>
</TABLE>

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

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

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="border: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>1.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">NAME
        OR REPORTING PERSON</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">I.R.S.
        IDENTIFICATION NOS. OF ABOVE PERSON (ENTITIES ONLY) Not Required</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">MATTHEW
        T. MOROUN</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>2.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">CHECK
        THE APPROPRIATE BOX IF A MEMBER OF A GROUP</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif">(a)
        [_]</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif">(b)
        [_]</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>3.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">SEC
        USE ONLY</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>4.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">SOURCE
        OF FUNDS</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">OO
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SEE ITEM 3</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>5.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">CHECK
        BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)</FONT></P>
                                                                                          <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif">[_]</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>6.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">CITIZENSHIP
        OR PLACE OF ORGANIZATION:</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">UNITED
        STATES OF AMERICA</FONT></P></TD></TR>
<TR STYLE="text-align: center; vertical-align: top">
    <TD STYLE="width: 12%; border-right: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center; vertical-align: bottom"><FONT STYLE="font: 10pt Times New Roman, Times, Serif; color: Black"><B>NUMBER
    OF</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; border-right: Black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>7.</B></FONT></TD>
    <TD STYLE="width: 80%; border-bottom: Black 1pt solid; border-right: Black 1pt solid; text-align: left"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">SOLE
        VOTING POWER</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">812,284*</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>SHARES</B></FONT></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font: 10pt Times New Roman, Times, Serif; color: Black"><B>BENEFICIALLY
                                         OWNED </B></FONT></P></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>8.</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">SHARED
        VOTING POWER</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">3,092,000**</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif; color: Black"><B>BY
    EACH REPORTING PERSON</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>9.</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">SOLE
        DISPOSITIVE POWER</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">812,284*</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>10.</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">SHARED
        DISPOSITIVE POWER</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">3,092,000**</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>11.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">AGGREGATE
        AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">3,904,284</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>12.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">CHECK
        BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">[_]</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>13.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">PERCENT
        OF CLASS REPRESENTED BY AMOUNT IN ROW (11)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">60.9%</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>14.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">TYPE
        OF REPORTING PERSON</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">IN</FONT></P></TD></TR>
</TABLE>


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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0pt"></TD><TD STYLE="width: 20pt; text-align: left">*</TD><TD STYLE="text-align: justify">Consists of (i) 804,284 shares of the Issuer&rsquo;s Common
Stock owned directly by Matthew T. Moroun and (ii) 8,000 shares of the Issuer&rsquo;s Common Stock issuable to Mr. Moroun upon
exercise of stock options granted to Mr. Moroun by the Issuer.</TD>
</TR></TABLE>



<P STYLE="margin: 0"></P>


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

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

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0pt"></TD><TD STYLE="width: 20pt; text-align: left">**</TD><TD STYLE="text-align: justify">Consists of 3,092,000 shares of the Issuer&rsquo;s Common
Stock held by the Moroun Trust, of which Mr. Matthew T. Moroun is a beneficiary and, together with Mr. Hal M. Briand, a co-trustee.</TD>
</TR></TABLE>



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    <TD STYLE="width: 33%">CUSIP No. 693149-10-6</TD>
    <TD STYLE="width: 34%; text-align: center">SCHEDULE 13D/A</TD>
    <TD STYLE="width: 33%">&nbsp;</TD></TR>
</TABLE>

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

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

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="border: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>1.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">NAME
        OR REPORTING PERSON</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">I.R.S.
        IDENTIFICATION NOS. OF ABOVE PERSON (ENTITIES ONLY) Not Required</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">HAL
M. BRIAND</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>2.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">CHECK
        THE APPROPRIATE BOX IF A MEMBER OF A GROUP</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif">(a)
        [_]</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif">(b)
        [_]</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>3.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">SEC
        USE ONLY</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>4.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">SOURCE
        OF FUNDS</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">OO
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SEE ITEM 3</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>5.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">CHECK
        BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)</FONT></P>
                                                                                          <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif">[_]</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>6.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">CITIZENSHIP
        OR PLACE OF ORGANIZATION:</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">UNITED
        STATES OF AMERICA</FONT></P></TD></TR>
<TR STYLE="text-align: center; vertical-align: top">
    <TD STYLE="width: 12%; border-right: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center; vertical-align: bottom"><FONT STYLE="font: 10pt Times New Roman, Times, Serif; color: Black"><B>NUMBER
    OF</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; border-right: Black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>7.</B></FONT></TD>
    <TD STYLE="width: 80%; border-bottom: Black 1pt solid; border-right: Black 1pt solid; text-align: left"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">SOLE
        VOTING POWER</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">0</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>SHARES</B></FONT></P>
                                                                                <P STYLE="margin-top: 0; margin-bottom: 0"><FONT STYLE="font: 10pt Times New Roman, Times, Serif; color: Black"><B>BENEFICIALLY
                                         OWNED </B></FONT></P></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>8.</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">SHARED
        VOTING POWER</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">3,092,000**</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif; color: Black"><B>BY
    EACH REPORTING PERSON</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>9.</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">SOLE
        DISPOSITIVE POWER</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">0</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>10.</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">SHARED
        DISPOSITIVE POWER</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">3,092,000**</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>11.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">AGGREGATE
        AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">3,902,000**</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>12.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">CHECK
        BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">[_]</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>13.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">PERCENT
        OF CLASS REPRESENTED BY AMOUNT IN ROW (11)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">48.3%</FONT></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font: 10pt Calibri, Helvetica, Sans-Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; color: Black"><B>14.</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt"><FONT STYLE="font-family: Times New Roman, Times, Serif">TYPE
        OF REPORTING PERSON</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif">IN</FONT></P></TD></TR>
</TABLE>


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


<P STYLE="margin: 0">&nbsp;</P>


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

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0pt"></TD><TD STYLE="width: 20pt; text-align: left">**</TD><TD STYLE="text-align: justify">Consists of 3,092,000 shares of the Issuer&rsquo;s Common
Stock held by the Moroun Trust, of which Mr. Matthew T. Moroun is a beneficiary and, together with Mr. Hal M. Briand, a co-trustee.</TD>
</TR></TABLE>



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

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

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

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

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

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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">This Amendment No. 8 amends and supplements
the statement on Schedule 13D filed on January 15, 1997, as amended by the Amendment No. 1 filed on March 8, 2002, Amendment No.
2 filed on March 21, 2002, Amendment No. 3 filed on March 6, 2009, Amendment No. 4 filed on March 20, 2009, Amendment No. 5 filed
on January 28, 2014, Amendment No. 6 filed on January 29, 2015, and Amendment No. 7 filed on May 2, 2016 (as amended, the &ldquo;Schedule
13D&rdquo;). Each Item below amends and supplements the information disclosed under the corresponding Item of the Schedule 13D.
Capitalized terms used but not defined herein shall have the meanings attributed to them in the Schedule 13D. Except as otherwise
set forth herein, this Amendment No. 8 does not modify any of the information previously reported by the Reporting Persons in the
Schedule 13D.</P>

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

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.75in">Item 3.</TD><TD>Source and Amount of Funds or Other Consideration.</TD></TR></TABLE>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Item 3 of the Schedule 13D is hereby amended
and supplemented by inserting the following paragraph after the last paragraph thereof:</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">On March 31, 2017, Mr. Moroun received 614
shares of Common Stock from the Issuer as part of the Issuer&rsquo;s annual retainer for non-employee directors. On February 10,
2017, Mr. Moroun purchased 2,000 shares of Common Stock from the Issuer upon exercise of outstanding stock options, using personal
funds. These stock options were included in Mr. Moroun&rsquo;s beneficial ownership as previously reported in the Schedule 13D.
Therefore, the increase in the percentage of Common Stock beneficially owned by Matthew T. Moroun since the filing of Amendment
No. 7 to this Schedule 13D is due to Mr. Moroun&rsquo;s receipt of shares of Common Stock as part of his annual retainer as a non-employee
director of the Issuer and to a decrease in the Issuer&rsquo;s total outstanding shares of Common Stock. The increase in the percentage
of Common Stock beneficially owned by Hal M. Briand since the filing of Amendment No. 7 to this Schedule 13D is due solely to the
decrease in the Issuer&rsquo;s total outstanding shares of Common Stock.</P>

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

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.75in">Item 4.</TD><TD>Purpose of Transaction.</TD></TR></TABLE>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Item 4 of the Schedule 13D is hereby amended
and supplemented by inserting the following paragraph after the last paragraph thereof:</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">With respect to the shares of Common Stock
acquired by Mr. Moroun since the filing of Amendment No. 7 to this Schedule 13D, a purchase of 2,000 shares of Common Stock by
exercising stock options was effectuated for investment purposes, using personal funds, and 614 shares of Common Stock were awarded
to Mr. Moroun as part of an annual retainer for non-employee directors.</P>

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

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

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

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

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

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

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

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

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<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.75in">Item 5.</TD><TD>Interest in Securities of the Issuer.</TD></TR></TABLE>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Item 5 of the Schedule 13D is hereby amended
and restated in its entirety to read as follows:</P>

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

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 6%"></TD><TD STYLE="width: 3%">(a)</TD><TD STYLE="width: 91%">Mr. Moroun beneficially owns an aggregate of 3,904,284 shares, or 60.9%, of the outstanding Common Stock, including currently
exercisable stock options to purchase 8,000 shares of Common Stock. Of the 3,904,284 shares beneficially owned by Mr. Moroun, 812,284
shares are owned directly by Mr. Moroun, 8,000 shares of Common Stock are issuable to Mr. Moroun upon the exercise of currently
exercisable stock options, and 3,092,000 shares are held of record by the Moroun Trust, of which Mr. Moroun is a beneficiary and,
together with Mr. Briand, a co-trustee. Mr. Briand beneficially owns an aggregate of 3,092,000 shares, or 48.3%, of the outstanding
Common Stock, which shares are held of record by the Moroun Trust, of which Mr. Briand, together with Mr. Moroun, is a co-trustee.
The percentage of the outstanding shares of Common Stock owned by each Reporting Person is based on 6,400,803 shares of Common
Stock outstanding, as reported in the Issuer&rsquo;s Definitive Proxy Statement on Schedule 14A filed with the Commission on March
21, 2017, plus, in the case of Mr. Moroun, 8,000 shares issuable upon the exercise of Mr. Moroun&rsquo;s outstanding stock options.</TD></TR></TABLE>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 6%"></TD><TD STYLE="width: 3%">(b)</TD><TD STYLE="width: 91%">Mr. Moroun has sole power to vote or direct the vote and to dispose or direct the disposition of 812,284 shares of Common Stock,
which includes currently exercisable stock options to purchase 8,000 shares of Common Stock. Mr. Moroun and Mr. Briand share the
power to vote or direct the vote and to dispose or direct the disposition of 3,092,000 shares of Common Stock held by the Moroun
Trust.</TD></TR></TABLE>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 6%"></TD><TD STYLE="width: 3%">(c)</TD><TD STYLE="width: 91%">Except for the transactions described in Item 3 of this Amendment No. 8, the Reporting Persons have not engaged in any transactions
in the Common Stock during the past 60 days.</TD></TR></TABLE>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 6%"></TD><TD STYLE="width: 3%">(d)</TD><TD STYLE="width: 91%">Not applicable.</TD></TR></TABLE>

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<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 6%"></TD><TD STYLE="width: 3%">(e)</TD><TD STYLE="width: 91%">Not applicable.</TD></TR></TABLE>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 1in"><B>Item 7.</B></TD><TD><B>Material to be Filed as Exhibits.</B></TD></TR></TABLE>

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<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 4%; text-indent: 0in; font-size: 10pt"><FONT STYLE="font-size: 10pt">1.1</FONT></TD>
    <TD STYLE="width: 96%; text-indent: 0in; font-size: 10pt"><FONT STYLE="font-size: 10pt">Joint Filing Agreement dated March 6, 2009 by and among Matthew T. Moroun and Hal M. Briand (incorporated by reference to Exhibit 1.1 of the Schedule 13D/A filed by the Reporting Persons with the Commission on March 6, 2009 (file number 005-39193))</FONT></TD></TR>
</TABLE>
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<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">After reasonable inquiry and to the best
of our knowledge and belief, each of the undersigned certify that the information set forth in this statement is true, complete
and correct.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Dated:&#9;April 7, 2017</P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 320pt"><FONT STYLE="font-size: 10pt"><B>MATTHEW
T. MOROUN</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 320pt">By: <U>/s/ Matthew
T. Moroun&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 320pt"><FONT STYLE="font-size: 10pt">Name:&#9;Matthew
T. Moroun</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 320pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 320pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 320pt"><FONT STYLE="font-size: 10pt"><B>HAL
M. BRIAND</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 320pt"><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 320pt">By: <U>/s/ Hal M.
Briand&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 320pt"><U></U><FONT STYLE="font-size: 10pt">Name:&#9;Hal
M. Briand</FONT></P>


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

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    <TD STYLE="width: 11%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Exhibit
        No.</B></P></TD>
    <TD STYLE="width: 89%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Description</B></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">1.1</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Joint Filing Agreement dated March 6, 2009 by and among Matthew T. Moroun and Hal M. Briand (incorporated by reference to Exhibit 1.1 of the Schedule 13D/A filed by the Reporting Persons with the Commission on March 6, 2009 (file number 005-39193))</FONT></TD></TR>
</TABLE>


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