AT&T Inc.
MX ˙ BMV ˙ US00206R1023
SecurityMX:T / AT&T Inc.
InstitutionWinton Capital Group Ltd
Latest Disclosed Ownership254,184 shares
Latest Disclosed Value $ 7,368,794
Winton Capital Group Ltd ownership in T / AT&T Inc.

On May 12, 2026 - Winton Capital Group Ltd filed a 13F-HR form disclosing ownership of 254,184 shares of AT&T Inc. (MX:T) valued at $7,368,794 USD as of March 31, 2026. The entity filed a previous 13F-HR on August 14, 2025 disclosing 0 shares of AT&T Inc..

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)
2026-05-12 2026-03-31 13F AT&T COM 00206R102 254,184 254,184 7,369 0.2585
2025-08-14 2025-06-30 13F AT&T COM 00206R102 0 -29,936 -100.00 0 -100.00
2025-05-15 2025-03-31 13F AT&T COM 00206R102 29,936 7,499 33.42 847 65.88 0.0516
2025-02-12 2024-12-31 13F AT&T COM 00206R102 22,437 -12,135 -35.10 511 -32.89 0.0339
2024-11-12 2024-09-30 13F AT&T COM 00206R102 34,572 -36,673 -51.47 761 -44.16 0.0533
2024-08-09 2024-06-30 13F AT&T COM 00206R102 71,245 48,831 217.86 1,361 245.43 0.0920
2024-05-14 2024-03-31 13F AT&T COM 00206R102 22,414 22,414 394 0.0279
2023-05-12 2023-03-31 13F AT&T COM 00206R102 0 -11,478 -100.00 0 -100.00
2023-02-14 2022-12-31 13F AT&T COM 00206R102 11,478 -81,955 -87.72 211 -85.28 0.0139
2022-11-10 2022-09-30 13F AT&T COM 00206R102 93,433 -160,467 -63.20 1,433 -73.07 0.0935
2022-08-10 2022-06-30 13F AT&T COM 00206R102 253,900 215,654 563.86 5,322 488.72 0.2822
2022-05-11 2022-03-31 13F AT&T COM 00206R102 38,246 38,246 904 0.0474
2022-02-10 2021-12-31 13F AT&T COM 00206R102 0 -24,308 -100.00 0 -100.00
2021-10-28 2021-09-30 13F AT&T COM 00206R102 24,308 -102,011 -80.76 657 -81.93 0.0368
2021-08-10 2021-06-30 13F AT&T COM 00206R102 126,319 96,411 322.36 3,635 301.66 0.1952
2021-07-21 2021-03-31 13F AT&T COM 00206R102 29,908 29,908 905 0.0516
2019-07-08 2019-06-30 13F AT&T COM 00206R102 0 -9,235 -100.00 0 -100.00
2019-05-13 2019-03-31 13F AT&T COM 00206R102 9,235 -2,073 -18.33 290 -10.22 0.0058
2019-02-05 2018-12-31 13F AT&T COM 00206R102 11,308 -4,557 -28.72 323 -39.40 0.0070
2018-11-02 2018-09-30 13F AT&T COM 00206R102 15,865 -13,538 -46.04 533 -43.54 0.0112
2018-08-20 2018-06-30 13F AT&T COM 00206R102 29,403 5,585 23.45 944 11.19 0.0241
2018-05-21 2018-03-31 13F AT&T COM 00206R102 23,818 -5,483 -18.71 849 -25.46 0.0240
2018-02-13 2017-12-31 13F AT&T COM 00206R102 29,301 -36,048 -55.16 1,139 -55.51 0.0330
2017-11-13 2017-09-30 13F AT&T COM 00206R102 65,349 -23,694 -26.61 2,560 -23.81 0.0815
2017-08-17 2017-06-30 13F AT&T COM 00206R102 89,043 -338,818 -79.19 3,360 -80.66 0.0988
2017-05-12 2017-03-31 13F AT&T COM 00206R102 427,861 420,959 6,099.09 17,375 5,809.86 0.2986
2017-02-13 2016-12-31 13F AT&T COM 00206R102 6,902 -420,959 -98.39 294 -98.31 0.0097
2016-11-08 2016-09-30 13F AT&T COM 00206R102 427,861 427,861 0.00 17,375 0.2986
2015-11-10 2015-09-30 13F AT&T COM 00206R102 0 -73,919 -100.00 0 -100.00
2015-08-06 2015-06-30 13F AT&T COM 00206R102 73,919 -3,035,231 -97.62 2,626 -97.41 0.0241
2015-05-12 2015-03-31 13F AT&T COM 00206R102 3,109,150 1,561,002 100.83 101,514 95.21 0.8084
2015-03-16 2014-12-31 13F/A-1 AT&T COM 00206R102 1,548,148 444,673 40.30 52,002 33.73 0.6438
2015-02-13 2014-12-31 13F AT&T COM 00206R102 1,679,558 56,416
2014-10-28 2014-09-30 13F AT&T COM 00206R102 1,103,475 987,985 855.47 38,886 852.15 0.2781
2014-08-05 2014-06-30 13F AT&T COM 00206R102 115,490 115,490 4,084 0.0278
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.