AT&T Inc.
MX ˙ BMV ˙ US00206R1023
SecurityMX:T / AT&T Inc.
InstitutionCostello Asset Management, INC
Latest Disclosed Ownership12,676 shares
Latest Disclosed Value $ 367,477
Costello Asset Management, INC reports 0.56% increase in ownership of T / AT&T Inc.

On April 30, 2026 - Costello Asset Management, INC filed a 13F-HR form disclosing ownership of 12,676 shares of AT&T Inc. (MX:T) valued at $367,477 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 12,606 shares of AT&T Inc.. This represents a change in shares of 0.56% 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)
2026-04-30 2026-03-31 13F AT&T COM 00206R102 12,676 70 0.56 367 17.25 0.1271
2026-02-03 2025-12-31 13F AT&T COM 00206R102 12,606 -2,517 -16.64 313 -26.70 0.1036
2025-11-06 2025-09-30 13F AT&T OM 00206R102 15,123 -7,636 -33.55 427 -35.11 0.1430
2025-07-24 2025-06-30 13F AT&T COM 00206R102 22,759 -10 -0.04 659 2.33 0.2474
2025-05-09 2025-03-31 13F AT&T COM 00206R102 22,769 8,527 59.87 644 98.46 0.2612
2025-01-24 2024-12-31 13F AT&T COM 00206R102 14,242 338 2.43 324 6.23 0.2145
2024-11-01 2024-09-30 13F AT&T COM 00206R102 13,904 -2,123 -13.25 306 -0.33 0.2046
2024-08-01 2024-06-30 13F AT&T COM 00206R102 16,027 3,082 23.81 306 34.80 0.2283
2024-04-24 2024-03-31 13F AT&T COM 00206R102 12,945 8,445 187.67 228 202.67 0.1630
2024-01-29 2023-12-31 13F AT&T COM 00206R102 4,500 0 0.00 76 11.94 0.0626
2023-11-08 2023-09-30 13F AT&T COM 00206R102 4,500 0 0.00 68 -5.63 0.0621
2023-07-28 2023-06-30 13F AT&T COM 00206R102 4,500 0 0.00 72 -17.44 0.0615
2023-05-05 2023-03-31 13F AT&T COM 00206R102 4,500 0 0.00 87 4.88 0.0892
2023-02-02 2022-12-31 13F AT&T COM 00206R102 4,500 0 0.00 83 18.84 0.0747
2022-11-03 2022-09-30 13F AT&T COM 00206R102 4,500 -2,000 -30.77 69 -49.26 0.0651
2022-07-22 2022-06-30 13F AT&T COM 00206R102 6,500 0 0.00 136 -11.69 0.1176
2022-04-26 2022-03-31 13F AT&T COM 00206R102 6,500 -4,219 -39.36 154 -41.67 0.1057
2022-01-28 2021-12-31 13F AT&T COM 00206R102 10,719 -15,713 -59.45 264 -63.03 0.1613
2021-10-29 2021-09-30 13F AT&T COM 00206R102 26,432 -3,925 -12.93 714 -18.31 0.4565
2021-08-05 2021-06-30 13F/A-1 AT&T COM 00206R102 30,357 3,152 11.59 874 6.07 0.5729
2021-08-05 2021-06-30 13F AT&T COM 00206R102 27,205 0 824 0.5694
2021-05-03 2021-03-31 13F AT&T COM 00206R102 27,205 -3,852 -12.40 824 -7.73 0.5694
2021-02-05 2020-12-31 13F AT&T COM 00206R102 31,057 -47,069 -60.25 893 -59.90 0.6756
2020-11-04 2020-09-30 13F AT&T COM 00206R102 78,126 -2,162 -2.69 2,227 -8.24 1.9602
2020-07-28 2020-06-30 13F AT&T COM 00206R102 80,288 -1,454 -1.78 2,427 -21.53 2.3859
2019-11-12 2019-09-30 13F AT&T COM 00206R102 81,742 54 0.07 3,093 13.01 3.6924
2019-08-12 2019-06-30 13F AT&T COM 00206R102 81,688 -2,564 -3.04 2,737 3.60 3.1150
2019-05-10 2019-03-31 13F AT&T COM 00206R102 84,252 -6,974 -7.64 2,642 1.46 3.1633
2019-02-08 2018-12-31 13F AT&T COM 00206R102 91,226 91,226 2,604 3.3714
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.