523 filings
Page 3 of 27
8-K
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30 Mar 23
Departure of Directors or Certain Officers
2:30pm
ARS
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28 Mar 23
Annual report to shareholders
10:09am
DEFA14A
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28 Mar 23
Additional proxy soliciting materials
10:06am
8-K
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21 Feb 23
ADTRAN Holdings, Inc. Reports Preliminary Earnings for the Fourth Quarter of 2022 and Declares Quarterly Cash Dividend
6:31am
8-K
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8 Feb 23
Termination of a Material Definitive Agreement
4:05pm
8-K
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26 Jan 23
Departure of Directors or Certain Officers
5:18pm
8-K
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19 Jan 23
Other Events
9:00am
S-3ASR
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23 Dec 22
Automatic shelf registration
4:31pm
8-K
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5 Dec 22
Entry into a Material Definitive Agreement
11:21am
8-K/A
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9 Nov 22
Results of Operations and Financial Condition
12:41pm
8-K
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8 Nov 22
ADTRAN Holdings, Inc. Reports Earnings for the Third Quarter of 2022 and Declares Quarterly Cash Dividend
7:31am
8-K
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26 Oct 22
Other Events
2:07pm
8-K/A
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25 Oct 22
ADTRAN Holdings, Inc. Announces Preliminary Results for the Third Quarter of 2022
2:16pm
8-K
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24 Oct 22
ADTRAN Holdings Announces Preliminary Results for the Third Quarter of 2022
6:12pm
8-K
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18 Oct 22
Other Events
1:41pm
8-K/A
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30 Sep 22
Departure of Directors or Certain Officers
5:30pm