ADTRAN Holdings, Inc.
US ˙ NasdaqGS ˙ US00486H1059

SecurityADTN / ADTRAN Holdings, Inc.
InstitutionTrexquant Investment LP
Latest Disclosed Ownership684,909 shares
Latest Disclosed Value $ 8,616,155
Trexquant Investment LP reports 90.76% increase in ownership of ADTN / ADTRAN Holdings, Inc.

On May 15, 2026 - Trexquant Investment LP filed a 13F-HR form disclosing ownership of 684,909 shares of ADTRAN Holdings, Inc. (US:ADTN) valued at $8,616,155 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 359,047 shares of ADTRAN Holdings, Inc.. This represents a change in shares of 90.76% during the quarter. The current value of the position is $10,513,353 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.

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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 684,909 325,862 90.76 8,616 176.15 0.0619
2026-02-17 2025-12-31 13F ADTRAN HOLDINGS COM 00486H105 359,047 -322,042 -47.28 3,120 -51.16 0.0278
2025-11-14 2025-09-30 13F ADTRAN HOLDINGS COM 00486H105 681,089 391,127 134.89 6,389 145.69 0.0658
2025-08-12 2025-06-30 13F ADTRAN HOLDINGS COM 00486H105 289,962 -103,534 -26.31 2,601 -24.22 0.0293
2025-05-14 2025-03-31 13F ADTRAN HOLDINGS COM 00486H105 393,496 106,641 37.18 3,431 43.62 0.0399
2025-02-12 2024-12-31 13F ADTRAN HOLDINGS COM 00486H105 286,855 120,926 72.88 2,390 143.03 0.0279
2024-11-12 2024-09-30 13F ADTRAN HOLDINGS COM 00486H105 165,929 -128,596 -43.66 984 -36.54 0.0125
2024-08-13 2024-06-30 13F ADTRAN HOLDINGS COM 00486H105 294,525 294,525 1,549 0.0236
2024-02-09 2023-12-31 13F ADTRAN HOLDINGS COM 00486H105 0 -101,520 -100.00 0 -100.00
2023-11-13 2023-09-30 13F ADTRAN HOLDINGS COM 00486H105 101,520 42,394 71.70 836 34.24 0.0210
2023-08-11 2023-06-30 13F ADTRAN HOLDINGS COM 00486H105 59,126 59,126 623 0.0163
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.