<SEC-DOCUMENT>0001564590-17-025375.txt : 20171229
<SEC-HEADER>0001564590-17-025375.hdr.sgml : 20171229
<ACCEPTANCE-DATETIME>20171229101204
ACCESSION NUMBER:		0001564590-17-025375
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20171228
ITEM INFORMATION:		Results of Operations and Financial Condition
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20171229
DATE AS OF CHANGE:		20171229

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ADTRAN INC
		CENTRAL INDEX KEY:			0000926282
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		IRS NUMBER:				630918200
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24612
		FILM NUMBER:		171280060

	BUSINESS ADDRESS:	
		STREET 1:		901 EXPLORER BLVD
		CITY:			HUNTSVILLE
		STATE:			AL
		ZIP:			35806
		BUSINESS PHONE:		2569638220

	MAIL ADDRESS:	
		STREET 1:		901 EXPLORER BLVD
		CITY:			HUNTSVILLE
		STATE:			AL
		ZIP:			35806
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>adtn-8k_20171228.htm
<DESCRIPTION>8-K - Q4 PRE-RELEASE
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<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
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<p style="text-align:center;margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-size:18pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">UNITED STATES</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:18pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">SECURITIES AND EXCHANGE COMMISSION</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">WASHINGTON, D.C. 20549 </p>
<p style="text-align:center;margin-top:9pt;line-height:4pt;border-bottom:Solid 1pt;padding-bottom:1pt;margin-bottom:0pt;margin-left:42.86%;margin-right:42.86%;text-indent:0%;font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="text-align:center;margin-top:9pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-size:18pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">FORM 8-K </p>
<p style="text-align:center;margin-top:9pt;line-height:4pt;border-bottom:Solid 1pt;padding-bottom:1pt;margin-bottom:0pt;margin-left:42.86%;margin-right:42.86%;text-indent:0%;font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="text-align:center;margin-top:9pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">CURRENT REPORT </p>
<p style="text-align:center;margin-top:9pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 </p>
<p style="text-align:center;margin-top:9pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Date of Report (Date of earliest event reported): December 28, 2017 </p>
<p style="text-align:center;margin-top:9pt;line-height:4pt;border-bottom:Solid 1pt;padding-bottom:1pt;margin-bottom:0pt;margin-left:42.86%;margin-right:42.86%;text-indent:0%;font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="text-align:center;margin-top:9pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-size:24pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">ADTRAN, Inc. </p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(Exact name of Registrant as Specified in Its Charter) </p>
<p style="text-align:center;margin-top:9pt;line-height:4pt;border-bottom:Solid 1pt;padding-bottom:1pt;margin-bottom:0pt;margin-left:42.86%;margin-right:42.86%;text-indent:0%;font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="text-align:justify;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:9pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">000-24612</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">63-0918200</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(State or Other Jurisdiction</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">of Incorporation)</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(Commission File Number)</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(IRS Employer</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Identification No.)</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&nbsp;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">901 Explorer Boulevard</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Huntsville, Alabama</p></td>
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<p style="line-height:2pt;text-align:justify;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:4pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">35806-2807</p></td>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(Address of Principal Executive Offices)</p></td>
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<p style="line-height:2pt;text-align:justify;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:4pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="bottom"  style="width:33%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(Zip Code)</p></td>
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<p style="text-align:center;margin-top:9pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Registrant&#8217;s Telephone Number, Including Area Code: (256) 963-8000 </p>
<p style="text-align:center;margin-top:9pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Not Applicable </p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(Former Name or Former Address, if Changed Since Last Report) </p>
<p style="text-align:center;margin-top:9pt;line-height:4pt;border-bottom:Solid 1pt;padding-bottom:1pt;margin-bottom:0pt;margin-left:42.86%;margin-right:42.86%;text-indent:0%;font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): </p>
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<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"><font style="font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"></font><font style="font-size:10pt;font-family:'Times New Roman'">&#9744;</font></p></td>
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<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) </p></td></tr></table></div>
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<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"><font style="font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"></font><font style="font-size:10pt;font-family:'Times New Roman'">&#9744;</font></p></td>
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<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) </p></td></tr></table></div>
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<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"><font style="font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"></font><font style="font-size:10pt;font-family:'Times New Roman'">&#9744;</font></p></td>
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<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) </p></td></tr></table></div>
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<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"><font style="font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:'Times New Roman';"></font><font style="font-size:10pt;font-family:'Times New Roman'">&#9744;</font></p></td>
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<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:10pt;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) </p></td></tr></table></div>
<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (&#167;&#8201;230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (&#167;&#8201;240.12b-2 of this chapter).</p>
<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Emerging growth company&#160;<font style="font-family:'Times New Roman';"><font style="font-size:10pt;font-family:'Times New Roman'">&#9744;</font></font></p>
<p style="margin-top:9pt;text-align:justify;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">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 13(a) of the Exchange Act.&#160;<font style="font-family:'Times New Roman';"><font style="font-size:10pt;font-family:'Times New Roman'">&#9744;</font></font></p>
<p style="text-align:center;margin-top:4pt;line-height:1pt;border-top:Solid 0.75pt #000000;padding-top:0pt;margin-bottom:0pt;text-indent:0%;font-size:4pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="text-align:center;margin-top:1pt;line-height:1pt;border-top:Solid 1pt;padding-top:1pt;margin-bottom:0pt;text-indent:0%;font-size:4pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><br /></p>
<p style="margin-bottom:12pt;margin-top:12pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
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<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;text-align:justify;margin-top:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><a name="_AEIOULastRenderedPageBreakAEIOU2"></a><font style="font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Item 2.02</font><font style="margin-left:36pt;">Results of Operations and Financial Condition.</font></p>
<p style="margin-bottom:0pt;margin-top:0pt;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;text-indent:7.14%;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">On December 28, 2017, ADTRAN, Inc. issued a press release announcing revised revenue and earnings estimates for the fiscal quarter ended December 31, 2017.</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">A copy of the press release announcing such expected results is attached as Exhibit 99.1 hereto and incorporated by reference herein.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="text-align:justify;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Item 9.01<font style="margin-left:36pt;">Financial Stateme</font>nts and Exhibits.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="text-align:justify;margin-bottom:0pt;margin-top:0pt;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;text-indent:7.14%;">(d)&nbsp;&nbsp;Exhibits.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="text-align:justify;margin-bottom:0pt;margin-top:0pt;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;text-indent:7.14%;">The following exhibits are furnished as part of this Current Report on Form 8-K.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
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<p style="text-align:justify;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><font style="text-decoration:underline;">Exhibit number</font></p></td>
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<p style="text-align:justify;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><font style="text-decoration:underline;">Description</font></p></td>
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<p style="text-align:justify;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">99.1</p></td>
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<p style="text-align:justify;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><a href="adtn-ex99_6.htm"><font style="text-decoration:underline;">Press release dated December 28, 2017</font></a></p></td>
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<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
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<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><a name="_AEIOULastRenderedPageBreakAEIOU3"></a><font style="font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">SIGNATURES</font></p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:12pt;margin-top:0pt;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;text-indent:7.14%;">Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on December 29, 2017.</p>
<p style="margin-bottom:0pt;text-align:left;margin-top:0pt;margin-left:42.86%;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">ADTRAN, Inc.<br />(Registrant)<font style="font-weight:normal;"><br /></font></p>
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<p style="margin-bottom:0pt;text-align:left;margin-top:0pt;margin-left:42.86%;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Chief Financial Officer, Corporate Secretary and Treasurer</p>
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<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:11pt;">&nbsp;</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">EXHIBIT 99.1</p>
<p style="text-align:left;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;font-family:Times New Roman;">&nbsp;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;"><font style="text-decoration:underline;">ADTRAN, INC. ANNOUNCES REVISED FOURTH </font></p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;"><font style="text-decoration:underline;">QUARTER REVENUE AND EARNINGS</font><font style="text-decoration:underline;letter-spacing:-0.65pt;"> </font><font style="text-decoration:underline;">ESTIMATE</font></p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;font-family:Times New Roman;">&nbsp;</p>
<p style="margin-top:8pt;text-align:left;margin-bottom:0pt;margin-left:1.07%;margin-right:5.75%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">HUNTSVILLE, ALABAMA - ADTRAN, Inc. (NASDAQ: ADTN) announced revised revenue and earnings estimates for the fourth quarter ending December 31, 2017. Based upon information currently available, revenue for the quarter is expected to be approximately $125 million. Non-GAAP earnings per share for the quarter are expected to be approximately $0.01. GAAP earnings per share for the quarter, assuming dilution, are expected to be a loss of approximately $0.04. Further, our current expectations are that revenue for the first quarter of 2018 will be in the range of the fourth quarter of 2017.</p>
<p style="margin-top:8pt;text-align:left;margin-bottom:0pt;margin-left:1.07%;margin-right:7.74%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">ADTRAN Chief Executive Officer Tom Stanton stated, &#8220;Our performance this quarter has been significantly impacted by a merger-related review and slowdown in the spending at a domestic Tier 1 customer. Our current understanding is that this review will be completed in 60 to 90 days, at which time capital plans will be finalized. Going forward, recent awards and trials in Tier 1 customer accounts, both domestically and abroad, leave us very confident about our positioning.&#8221;</p>
<p style="margin-top:8pt;text-align:left;margin-bottom:0pt;margin-left:1.07%;margin-right:7.74%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">GAAP earnings per share exclude any potential income tax effects of the Tax Cuts and Jobs Act. Non-GAAP earnings per share exclude the effect of acquisition-related expenses, amortizations and adjustments, and stock compensation expense.</p>
<p style="margin-top:8pt;text-align:left;margin-bottom:0pt;margin-left:1.07%;margin-right:4.17%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The Company confirmed that its fourth quarter conference call will be held Wednesday, January 17, 2018, at 9:30 a.m. Central Time. ADTRAN will webcast this conference. To listen, simply visit the Investor Relations site at <font style="text-decoration:underline;">www.investors.adtran.com</font> approximately 10 minutes before the start of the call and click on the conference call link provided.</p>
<p style="margin-top:8pt;text-align:left;margin-bottom:0pt;margin-left:1.07%;margin-right:5.16%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">An online replay of the conference call, as well as the text of the Company's earnings release, will be available on the Investor Relations site approximately 24 hours following the call and will remain available for at least 12 months.</p>
<p style="margin-top:8pt;text-align:left;margin-bottom:0pt;margin-left:1.07%;margin-right:5.16%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">ADTRAN, Inc. is a leading global provider of networking and communications equipment. ADTRAN&#8217;s products enable voice, data, video and Internet communications across a variety of network infrastructures. ADTRAN solutions are currently in use by service providers, private enterprises, government organizations, and millions of individual users worldwide. For more information, please visit&#160;<font style="text-decoration:underline;">www.adtran.com</font>.</p>
<p style="margin-top:8pt;text-align:left;margin-bottom:0pt;margin-left:1.07%;margin-right:5.16%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">For more information, contact the company at 800 9ADTRAN (800 923-8726) or via email at <font style="text-decoration:underline;">investor.relations@adtran.com</font>. On the Web, visit&#160;<font style="text-decoration:underline;">www.adtran.com</font>.</p>
<p style="margin-top:8pt;text-align:left;margin-bottom:0pt;margin-left:1.07%;margin-right:5.16%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">This press release contains forward-looking statements which reflect management&#8217;s best judgment based on factors currently known. However, these statements involve risks and uncertainties, including the successful development and market acceptance of new products, the degree of competition in the market for such products, the product and channel mix, component costs, manufacturing efficiencies, and other risks detailed in our annual report on Form 10-K for the year ended&#160;December 31, 2016. These risks and uncertainties could cause actual results to differ materially from those in the forward-looking statements included in this press release.</p>
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