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
June 29, 2021
Form 11-K
Annual Report of Employee Stock Plans
June 7, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 7, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 7, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 7, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 7, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 7, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 7, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 4, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 4, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 4, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 4, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 4, 2021
Form 4
Statement of Changes in Beneficial Ownership
June 4, 2021
Form 4
Statement of Changes in Beneficial Ownership
May 21, 2021
Form SD
Specialized Disclosure Report
May 18, 2021
Form 8-K
Current report filing
May 6, 2021
Form 10-Q
Quarterly Report
May 6, 2021
Form 8-K
Current report filing
March 30, 2021
Form DEFA14A
Additional Proxy Soliciting Materials (definitive)
March 30, 2021
Form DEF 14A
Proxy Statement (definitive)
March 8, 2021
Form 4/A
Amended Statement of Changes in Beneficial Ownership
March 8, 2021
Form 4
Statement of Changes in Beneficial Ownership
March 8, 2021
Form 4
Statement of Changes in Beneficial Ownership
March 8, 2021
Form 4
Statement of Changes in Beneficial Ownership
March 8, 2021
Form 4
Statement of Changes in Beneficial Ownership
March 8, 2021
Form 4
Statement of Changes in Beneficial Ownership
March 8, 2021
Form 4
Statement of Changes in Beneficial Ownership
March 8, 2021
Form 4
Statement of Changes in Beneficial Ownership
March 8, 2021
Form 4
Statement of Changes in Beneficial Ownership
March 8, 2021
Form 4
Statement of Changes in Beneficial Ownership
March 1, 2021
Form 4
Statement of Changes in Beneficial Ownership
February 26, 2021
Form 10-K
Annual Report
February 26, 2021
Form 8-K/A
Amended Current report filing
February 17, 2021
Form 4
Statement of Changes in Beneficial Ownership
February 12, 2021
Form SC 13G/A
Amended Statement of Ownership
February 10, 2021
Form SC 13G/A
Amended Statement of Ownership
February 10, 2021
Form SC 13G/A
Amended Statement of Ownership
February 8, 2021
Form 3
Initial Statement of Beneficial Ownership
February 4, 2021
Form 8-K
Current report filing
February 2, 2021
Form SC 13G/A
Amended Statement of Ownership
February 2, 2021
Form SC 13G/A
Amended Statement of Ownership
January 25, 2021
Form SC 13G
Statement of Ownership
January 5, 2021
Form 4
Statement of Changes in Beneficial Ownership
January 5, 2021
Form 4
Statement of Changes in Beneficial Ownership
January 5, 2021
Form 4
Statement of Changes in Beneficial Ownership
January 5, 2021
Form 4
Statement of Changes in Beneficial Ownership
January 5, 2021
Form 4
Statement of Changes in Beneficial Ownership
January 5, 2021
Form 4
Statement of Changes in Beneficial Ownership