Skip to main content
ADTRAN

SEC Filings

You are provided with a link to a third-party Section 16 Reports website. ADTRAN, Inc. does not maintain or provide information directly to this site. ADTRAN, Inc. makes no representations or warranties with respect to the information contained herein and takes no responsibility for supplementing, updating, or correcting such information.

SEC RSS Feed (opens in new window)
SEC filing year list 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996
Date Filing Type Filing Description Download / View
December 3, 2020
Form 4/A
Amended Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4/A
Amended Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4/A
Amended Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
December 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 18, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 18, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 18, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 18, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 18, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 18, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 18, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 17, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 16, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 16, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 16, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 16, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 16, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 16, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 12, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 12, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 12, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 12, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 12, 2020
Form 4
Statement of Changes in Beneficial Ownership
November 6, 2020
Form 10-Q
Quarterly Report
November 3, 2020
Form 8-K
Current report filing
October 29, 2020
Form S-8
Securities Registration: Employee Benefit Plan
October 29, 2020
Form S-8
Securities Registration: Employee Benefit Plan
September 16, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 16, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 10, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 8, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 8, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 8, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 8, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 8, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 8, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 8, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 4, 2020
Form 4
Statement of Changes in Beneficial Ownership
September 4, 2020
Form 4
Statement of Changes in Beneficial Ownership
August 7, 2020
Form 10-Q
Quarterly Report
August 6, 2020
Form 8-K
Current report filing
July 23, 2020
Form 8-K
Current report filing
June 29, 2020
Form 11-K
Annual Report of Employee Stock Plans
June 5, 2020
Form 4
Statement of Changes in Beneficial Ownership
June 5, 2020
Form 4
Statement of Changes in Beneficial Ownership
June 5, 2020
Form 4
Statement of Changes in Beneficial Ownership
June 5, 2020
Form 4
Statement of Changes in Beneficial Ownership
June 5, 2020
Form 4
Statement of Changes in Beneficial Ownership
June 5, 2020
Form 4
Statement of Changes in Beneficial Ownership
June 5, 2020
Form 4
Statement of Changes in Beneficial Ownership
June 5, 2020
Form 4
Statement of Changes in Beneficial Ownership
June 5, 2020
Form 4
Statement of Changes in Beneficial Ownership
May 28, 2020
Form SD
Specialized Disclosure Report
May 15, 2020
Form 8-K
Current report filing
May 14, 2020
Form 4
Statement of Changes in Beneficial Ownership
May 11, 2020
Form 8-K
Current report filing
May 8, 2020
Form 10-Q
Quarterly Report
May 7, 2020
Form 8-K
Current report filing
April 13, 2020
Form DEFA14A
Additional Proxy Soliciting Materials (definitive)
April 2, 2020
Form DEFA14A
Additional Proxy Soliciting Materials (definitive)
April 2, 2020
Form DEF 14A
Proxy Statement (definitive)
March 17, 2020
Form 4
Statement of Changes in Beneficial Ownership
March 10, 2020
Form 4/A
Amended Statement of Changes in Beneficial Ownership
March 9, 2020
Form 4
Statement of Changes in Beneficial Ownership
March 9, 2020
Form 4
Statement of Changes in Beneficial Ownership
March 9, 2020
Form 4
Statement of Changes in Beneficial Ownership
March 9, 2020
Form 4
Statement of Changes in Beneficial Ownership
March 9, 2020
Form 4
Statement of Changes in Beneficial Ownership
March 9, 2020
Form 4
Statement of Changes in Beneficial Ownership
March 9, 2020
Form 4
Statement of Changes in Beneficial Ownership
March 9, 2020
Form 4
Statement of Changes in Beneficial Ownership
March 9, 2020
Form 4
Statement of Changes in Beneficial Ownership
March 9, 2020
Form 4
Statement of Changes in Beneficial Ownership
February 26, 2020
Form 4
Statement of Changes in Beneficial Ownership
February 25, 2020
Form 8-K
Current report filing
February 25, 2020
Form 10-K
Annual Report
February 19, 2020
Form 4
Statement of Changes in Beneficial Ownership
February 12, 2020
Form SC 13G
Statement of Ownership
February 12, 2020
Form SC 13G/A
Amended Statement of Ownership
February 12, 2020
Form SC 13G/A
Amended Statement of Ownership
February 6, 2020
Form 8-K
Current report filing
February 4, 2020
Form SC 13G/A
Amended Statement of Ownership
January 30, 2020
Form SC 13G/A
Amended Statement of Ownership
January 22, 2020
Form 4
Statement of Changes in Beneficial Ownership
January 22, 2020
Form 4
Statement of Changes in Beneficial Ownership
January 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
January 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
January 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
January 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
January 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
January 3, 2020
Form 4
Statement of Changes in Beneficial Ownership
January 3, 2020
Form 4
Statement of Changes in Beneficial Ownership