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 2023 2022 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
September 29, 2023
Form 8-K
Current report filing
September 21, 2023
Form 4
Statement of Changes in Beneficial Ownership
September 7, 2023
Form 4
Statement of Changes in Beneficial Ownership
September 7, 2023
Form 4
Statement of Changes in Beneficial Ownership
September 7, 2023
Form 4
Statement of Changes in Beneficial Ownership
September 7, 2023
Form 4
Statement of Changes in Beneficial Ownership
September 7, 2023
Form 4
Statement of Changes in Beneficial Ownership
September 7, 2023
Form 4
Statement of Changes in Beneficial Ownership
September 7, 2023
Form 4
Statement of Changes in Beneficial Ownership
September 7, 2023
Form 4
Statement of Changes in Beneficial Ownership
September 7, 2023
Form 4
Statement of Changes in Beneficial Ownership
September 7, 2023
Form 4
Statement of Changes in Beneficial Ownership
August 14, 2023
Form 8-K/A
Amended Current report filing
August 14, 2023
Form 10-Q/A
Amended Quarterly Report
August 14, 2023
Form 10-Q
Quarterly Report
August 14, 2023
Form 10-K/A
Amended Annual Report
August 14, 2023
Form 10-Q/A
Amended Quarterly Report
August 10, 2023
Form NT 10-Q
Notification that Quarterly Report will be submitted late
August 10, 2023
Form 8-K/A
Amended Current report filing
August 10, 2023
Form 8-K
Current report filing
August 7, 2023
Form 8-K
Current report filing
June 28, 2023
Form 8-K
Current report filing
June 28, 2023
Form 11-K
Annual Report of Employee Stock Plans
June 8, 2023
Form 4
Statement of Changes in Beneficial Ownership
June 8, 2023
Form 4
Statement of Changes in Beneficial Ownership
June 8, 2023
Form 4
Statement of Changes in Beneficial Ownership
June 8, 2023
Form 4
Statement of Changes in Beneficial Ownership
June 8, 2023
Form 4
Statement of Changes in Beneficial Ownership
June 8, 2023
Form 4
Statement of Changes in Beneficial Ownership
June 8, 2023
Form 4
Statement of Changes in Beneficial Ownership
June 8, 2023
Form 4
Statement of Changes in Beneficial Ownership
June 8, 2023
Form 4
Statement of Changes in Beneficial Ownership
June 8, 2023
Form 4
Statement of Changes in Beneficial Ownership
June 1, 2023
Form 8-K
Current report filing
May 30, 2023
Form 8-K
Current report filing
May 26, 2023
Form SD
Specialized Disclosure Report
May 25, 2023
Form 4
Statement of Changes in Beneficial Ownership
May 25, 2023
Form 4
Statement of Changes in Beneficial Ownership
May 15, 2023
Form 8-K
Current report filing
May 10, 2023
Form 10-Q
Quarterly Report
May 9, 2023
Form 8-K
Current report filing
May 3, 2023
Form DEFA14A
Additional Proxy Soliciting Materials (definitive)
May 1, 2023
Form 3
Initial Statement of Beneficial Ownership
April 11, 2023
Form 8-K
Current report filing
April 3, 2023
Form 8-K
Current report filing
March 30, 2023
Form 8-K
Current report filing
March 28, 2023
Form ARS
Annual Report to Security Holders
March 28, 2023
Form DEF 14A
Proxy Statement (definitive)
March 28, 2023
Form DEFA14A
Additional Proxy Soliciting Materials (definitive)
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 23, 2023
Form 4
Statement of Changes in Beneficial Ownership
March 1, 2023
Form 10-K
Annual Report
February 21, 2023
Form 8-K
Current report filing
February 9, 2023
Form SC 13G/A
Amended Statement of Ownership
February 8, 2023
Form 8-K
Current report filing
January 26, 2023
Form 8-K
Current report filing
January 26, 2023
Form SC 13G/A
Amended Statement of Ownership
January 25, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 25, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 25, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 25, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 25, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 25, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 25, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 25, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 24, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 24, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 20, 2023
Form SC 13G
Statement of Ownership
January 19, 2023
Form 8-K
Current report filing
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership
January 4, 2023
Form 4
Statement of Changes in Beneficial Ownership