AT&T Inc.
MX ˙ BMV ˙ US00206R1023
SecurityMX:T / AT&T Inc.
InstitutionAsset Management One Co., Ltd.
Latest Disclosed Ownership3,482,712 shares
Latest Disclosed Value $ 100,963,821
Asset Management One Co., Ltd. reports 2.98% decrease in ownership of T / AT&T Inc.

On May 8, 2026 - Asset Management One Co., Ltd. filed a 13F-HR form disclosing ownership of 3,482,712 shares of AT&T Inc. (MX:T) valued at $100,963,821 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 3,589,589 shares of AT&T Inc.. This represents a change in shares of -2.98% during the quarter.

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)
2026-05-08 2026-03-31 13F AT&T COM 00206R102 3,482,712 -106,877 -2.98 100,964 13.55 0.2977
2026-01-27 2025-12-31 13F AT&T COM 00206R102 3,589,589 -69,759 -1.91 88,918 -13.96 0.2472
2025-10-22 2025-09-30 13F AT&T COM 00206R102 3,659,348 -38,996 -1.05 103,340 -3.45 0.2994
2025-07-31 2025-06-30 13F AT&T COM 00206R102 3,698,344 126,359 3.54 107,030 5.95 0.3356
2025-04-23 2025-03-31 13F AT&T COM 00206R102 3,571,985 132,260 3.85 101,016 28.47 0.3494
2025-01-30 2024-12-31 13F AT&T COM 00206R102 3,439,725 12,931 0.38 78,632 4.30 0.2702
2024-10-30 2024-09-30 13F AT&T COM 00206R102 3,426,794 89,982 2.70 75,389 18.23 0.2683
2024-07-18 2024-06-30 13F AT&T COM 00206R102 3,336,812 23,824 0.72 63,766 9.36 0.2439
2024-05-02 2024-03-31 13F AT&T COM 00206R102 3,312,988 -164,509 -4.73 58,309 0.16 0.2247
2024-01-24 2023-12-31 13F AT&T COM 00206R102 3,477,497 31,555 0.92 58,213 12.47 0.2343
2023-10-19 2023-09-30 13F AT&T COM 00206R102 3,445,942 -50,526 -1.45 51,758 -7.19 0.2304
2023-07-31 2023-06-30 13F AT&T COM 00206R102 3,496,468 -137,325 -3.78 55,769 -20.27 0.2361
2023-04-25 2023-03-31 13F AT&T COM 00206R102 3,633,793 -350,275 -8.79 69,951 -4.83 0.3170
2023-02-06 2022-12-31 13F AT&T COM 00206R102 3,984,068 161,140 4.22 73,502 25.34 0.3582
2022-11-04 2022-09-30 13F AT&T COM 00206R102 3,822,928 -312,152 -7.55 58,643 -32.34 0.2984
2022-07-29 2022-06-30 13F AT&T COM 00206R102 4,135,080 553,457 15.45 86,671 2.41 0.4070
2022-05-13 2022-03-31 13F AT&T COM 00206R102 3,581,623 -145,881 -3.91 84,633 -7.85 0.3304
2022-02-09 2021-12-31 13F AT&T COM 00206R102 3,727,504 14,773 0.40 91,841 -8.42 0.3200
2021-11-02 2021-09-30 13F AT&T COM 00206R102 3,712,731 -143,677 -3.73 100,280 -9.65 0.3844
2021-08-03 2021-06-30 13F AT&T COM 00206R102 3,856,408 -54,862 -1.40 110,987 -6.26 0.4130
2021-05-14 2021-03-31 13F AT&T COM 00206R102 3,911,270 -125,346 -3.11 118,395 2.75 0.4702
2021-02-12 2020-12-31 13F AT&T COM 00206R102 4,036,616 -73,148 -1.78 115,229 -1.66 0.4746
2020-11-13 2020-09-30 13F AT&T COM 00206R102 4,109,764 -122,438 -2.89 117,174 -8.41 0.5386
2020-08-14 2020-06-30 13F AT&T COM 00206R102 4,232,202 -182,200 -4.13 127,939 -0.58 0.6292
2020-05-14 2020-03-31 13F AT&T COM 00206R102 4,414,402 -55,615 -1.24 128,679 -26.34 0.7514
2020-02-14 2019-12-31 13F AT&T COM 00206R102 4,470,017 64,745 1.47 174,689 4.79 0.7874
2019-11-14 2019-09-30 13F AT&T COM 00206R102 4,405,272 37,396 0.86 166,696 13.89 0.8030
2019-08-14 2019-06-30 13F AT&T COM 00206R102 4,367,876 336,113 8.34 146,370 15.77 0.7189
2019-05-15 2019-03-31 13F AT&T COM 00206R102 4,031,763 -8,333,421 -67.39 126,437 -64.14 0.6837
2019-02-13 2018-12-31 13F AT&T COM 00206R102 12,365,184 93,997 0.77 352,546 -14.42 0.8403
2018-11-14 2018-09-30 13F AT&T COM 00206R102 12,271,187 76,214 0.62 411,932 5.18 0.8455
2018-08-14 2018-06-30 13F AT&T COM 00206R102 12,194,973 1,963,831 19.19 391,651 7.38 0.8560
2018-05-14 2018-03-31 13F AT&T COM 00206R102 10,231,142 -122,840 -1.19 364,733 -9.46 0.8214
2018-02-14 2017-12-31 13F AT&T COM 00206R102 10,353,982 -145,282 -1.38 402,822 -2.02 0.8887
2017-11-14 2017-09-30 13F AT&T COM 00206R102 10,499,264 83,656 0.80 411,129 4.64 0.9651
2017-08-14 2017-06-30 13F AT&T COM 00206R102 10,415,608 166,735 1.63 392,886 -7.78 1.0028
2017-05-11 2017-03-31 13F AT&T COM 00206R102 10,248,873 -627,313 -5.77 426,019 -7.93 1.1185
2017-05-02 2016-12-31 13F/A-1 AT&T COM 00206R102 10,876,186 9,568,534 731.73 462,693 769.95 1.1826
2017-02-13 2016-12-31 13F AT&T COM 00206R102 10,876,186 462,693
2016-11-07 2016-09-30 13F AT&T Com 00206R102 1,307,652 -101,091 -7.18 53,186 -11.88 0.7901
2016-08-03 2016-06-30 13F AT&T Com 00206R102 1,408,743 39,076 2.85 60,357 12.19 0.9056
2016-05-05 2016-03-31 13F AT&T Com 00206R102 1,369,667 180,685 15.20 53,798 30.37 0.7853
2016-01-28 2015-12-31 13F AT&T Com 00206R102 1,188,982 239,339 25.20 41,266 34.92 0.6159
2015-11-12 2015-09-30 13F AT&T Com 00206R102 949,643 175,224 22.63 30,586 10.57 0.4655
2015-08-06 2015-06-30 13F AT&T Com 00206R102 774,419 85,540 12.42 27,661 22.08 0.3833
2015-05-11 2015-03-31 13F AT&T Com 00206R102 688,879 -16,731 -2.37 22,658 -5.48 0.2798
2015-02-09 2014-12-31 13F AT&T Com 00206R102 705,610 -66,512 -8.61 23,972 -11.88 0.3111
2014-11-05 2014-09-30 13F AT&T Com 00206R102 772,122 -20,194 -2.55 27,203 -3.01 0.3756
2014-08-12 2014-06-30 13F AT&T Com 00206R102 792,316 -103,646 -11.57 28,047 -10.74 0.4186
2014-05-05 2014-03-31 13F AT&T Com 00206R102 895,962 -5,779 -0.64 31,421 -0.93 0.4952
2014-02-05 2013-12-31 13F/A-1 AT&T COM 00206R102 901,741 -136,571 -13.15 31,717 -10.01 0.4916
2014-01-29 2013-12-31 13F AT&T COM 00206R102 901,741 31,717
2014-02-05 2013-09-30 13F/A-1 AT&T COM 00206R102 1,038,312 25,362 2.50 35,245 -2.25 0.5304
2013-11-06 2013-09-30 13F AT&T Com 00206R102 1,038,312 35,245
2014-02-12 2013-06-30 13F/A-1 AT&T COM 00206R102 1,012,950 1,012,950 36,058 0.5855
2013-08-05 2013-06-30 13F AT&T Com 00206R102 1,012,950 36,058
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.