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Form SC 13G - Statement of acquisition of beneficial ownership by individuals:
SEC Accession No. 0001104659-24-015210
Filing Date
2024-02-12
Accepted
2024-02-12 18:04:25
Documents
1

Document Format Files

Seq Description Document Type Size
1 SC 13G tm245766d14_sc13g.htm SC 13G 52474
  Complete submission text file 0001104659-24-015210.txt   54061
Mailing Address 901 EXPLORER BLVD HUNTSVILLE AL 35806
Business Address 901 EXPLORER BLVD HUNTSVILLE AL 35806 256-963-8220
ADTRAN Holdings, Inc. (Subject) CIK: 0000926282 (see all company filings)

IRS No.: 872164282 | Fiscal Year End: 1231
Type: SC 13G | Act: 34 | File No.: 005-44919 | Film No.: 24621752
SIC: 3661 Telephone & Telegraph Apparatus
(CF Office: 04 Manufacturing)

Mailing Address 150 NORTH RIVERSIDE PLAZA CHICAGO IL 60606
Business Address 150 NORTH RIVERSIDE PLAZA CHICAGO IL 60606 312-236-1600
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (Filed by) CIK: 0001644956 (see all company filings)

IRS No.: 472614791 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G