Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001193125-23-132867
Filing Date
2023-05-03
Accepted
2023-05-02 21:14:27
Documents
2

Document Format Files

Seq Description Document Type Size
1 DEFA14A d183589ddefa14a.htm DEFA14A 37772
2 GRAPHIC g183589g0503031432260.jpg GRAPHIC 2289
  Complete submission text file 0001193125-23-132867.txt   42082
Mailing Address 901 EXPLORER BLVD HUNTSVILLE AL 35806
Business Address 901 EXPLORER BLVD HUNTSVILLE AL 35806 256-963-8220
ADTRAN Holdings, Inc. (Filer) CIK: 0000926282 (see all company filings)

EIN.: 872164282 | Fiscal Year End: 1231
Type: DEFA14A | Act: 34 | File No.: 001-41446 | Film No.: 23881390
SIC: 3661 Telephone & Telegraph Apparatus