# Filing Detail

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001193125-23-081611
Filing Date
2023-03-28
Accepted
2023-03-28 10:06:56
Documents
3

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | DEFA14A | d305204ddefa14a.htm | DEFA14A | 11146
2 | GRAPHIC | g305204dsp003.jpg | GRAPHIC | 335322
3 | GRAPHIC | g305204dsp004.jpg | GRAPHIC | 247341
| Complete submission text file | 0001193125-23-081611.txt |  | 814986

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.: 23766749
SIC: 3661 Telephone & Telegraph Apparatus