ADTRAN Holdings, Inc.
AT ˙ WBAG ˙ US00486H1059
14,06 € ↓ -0,50 (-3,45%)
2026-06-05
DEL PRIS
SecurityAT:ADTN / ADTRAN Holdings, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership167,920 shares
Latest Disclosed Value $ 1,459,225
Alliancebernstein L.p. reports 43.31% decrease in ownership of ADTN / ADTRAN Holdings, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 167,920 shares of ADTRAN Holdings, Inc. (AT:ADTN) valued at $1,801,782 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 296,231 shares of ADTRAN Holdings, Inc.. This represents a change in shares of -43.31% during the quarter. The current value of the position is $2,360,284 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F ADTRAN HOLDINGS COM 00486H105 167,920 -128,311 -43.31 1,459 -43.32 0.0005
2026-02-17 2025-12-31 13F ADTRAN HOLDINGS COM 00486H105 296,231 -54 -0.02 2,574 -7.38 0.0008
2025-11-14 2025-09-30 13F ADTRAN HOLDINGS COM 00486H105 296,285 -37,325 -11.19 2,779 -7.12 0.0009
2025-08-14 2025-06-30 13F ADTRAN HOLDINGS COM 00486H105 333,610 146,258 78.07 2,992 83.22 0.0010
2025-05-15 2025-03-31 13F ADTRAN HOLDINGS COM 00486H105 187,352 105,306 128.35 1,634 139.09 0.0006
2025-02-12 2024-12-31 13F ADTRAN HOLDINGS COM 00486H105 82,046 -4,795 -5.52 683 32.88 0.0002
2024-11-14 2024-09-30 13F ADTRAN HOLDINGS COM 00486H105 86,841 -8,950 -9.34 515 2.19 0.0002
2024-08-14 2024-06-30 13F ADTRAN HOLDINGS COM 00486H105 95,791 30,151 45.93 504 40.90 0.0002
2024-05-14 2024-03-31 13F ADTRAN HOLDINGS COM 00486H105 65,640 -8,288 -11.21 357 -34.13 0.0001
2024-02-14 2023-12-31 13F ADTRAN HOLDINGS COM 00486H105 73,928 5,749 8.43 543 -3.39 0.0002
2023-11-14 2023-09-30 13F ADTRAN HOLDINGS COM 00486H105 68,179 -14,036 -17.07 561 -35.14 0.0002
2023-08-15 2023-06-30 13F ADTRAN HOLDINGS COM 00486H105 82,215 1,173 1.45 866 -32.68 0.0004
2023-05-15 2023-03-31 13F ADTRAN HOLDINGS COM 00486H105 81,042 -11,799 -12.71 1,285 -26.32 0.0006
2023-02-15 2022-12-31 13F ADTRAN HOLDINGS COM 00486H105 92,841 -14 -0.02 1,744 -4.07 0.0008
2022-11-15 2022-09-30 13F ADTRAN HOLDINGS COM 00486H105 92,855 92,855 1,818 0.0009
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.