AT&T Inc.
CH ˙ SWX ˙ US00206R1023
SecurityCH:T / AT&T Inc.
InstitutionMain Street Research LLC
Latest Disclosed Ownership20,193 shares
Latest Disclosed Value $ 585,395
Main Street Research LLC reports 45.13% increase in ownership of T / AT&T Inc.

On April 30, 2026 - Main Street Research LLC filed a 13F-HR form disclosing ownership of 20,193 shares of AT&T Inc. (CH:T) valued at $585,395 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 13,914 shares of AT&T Inc.. This represents a change in shares of 45.13% 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 20,193 6,279 45.13 585 69.57 0.0341
2026-02-09 2025-12-31 13F AT&T COM 00206R102 13,914 -129 -0.92 346 -12.88 0.0198
2025-11-13 2025-09-30 13F AT&T COM 00206R102 14,043 1,789 14.60 397 11.86 0.0214
2025-08-05 2025-06-30 13F AT&T COM 00206R102 12,254 -3,439 -21.91 355 -20.09 0.0221
2025-04-30 2025-03-31 13F AT&T COM 00206R102 15,693 3,349 27.13 444 57.65 0.0290
2025-02-07 2024-12-31 13F AT&T COM 00206R102 12,344 -102 -0.82 281 2.93 0.0175
2024-11-12 2024-09-30 13F AT&T COM 00206R102 12,446 426 3.54 274 19.21 0.0172
2024-07-29 2024-06-30 13F AT&T COM 00206R102 12,020 -110 -0.91 230 7.51 0.0152
2024-05-01 2024-03-31 13F AT&T COM 00206R102 12,130 12,130 213 0.0145
2023-11-03 2023-09-30 13F AT&T COM 00206R102 0 -13,699 -100.00 0 -100.00
2023-08-08 2023-06-30 13F AT&T COM 00206R102 13,699 -1,123 -7.58 218 -23.51 0.0348
2023-05-01 2023-03-31 13F AT&T COM 00206R102 14,822 1,123 8.20 285 13.10 0.0563
2023-02-06 2022-12-31 13F AT&T COM 00206R102 13,699 -30 -0.22 252 19.43 0.0614
2022-11-14 2022-09-30 13F AT&T COM 00206R102 13,729 1,225 9.80 211 -19.47 0.0465
2022-08-12 2022-06-30 13F AT&T COM 00206R102 12,504 -1,195 -8.72 262 -19.14 0.0687
2022-05-05 2022-03-31 13F AT&T COM 00206R102 13,699 -5,318 -27.96 324 -30.77 0.0305
2022-02-09 2021-12-31 13F AT&T COM 00206R102 19,017 -3,170 -14.29 468 -21.87 0.0361
2021-11-12 2021-09-30 13F AT&T COM 00206R102 22,187 -893 -3.87 599 -9.79 0.0524
2021-08-06 2021-06-30 13F At&t COM 00206R102 23,080 -1,042 -4.32 664 -9.04 0.0533
2021-05-07 2021-03-31 13F At&t COM 00206R102 24,122 2,102 9.55 730 15.32 0.0687
2021-02-12 2020-12-31 13F At&t COM 00206R102 22,020 -367,049 -94.34 633 -94.29 0.0681
2020-11-10 2020-09-30 13F At&t COM 00206R102 389,069 -19,883 -4.86 11,092 -10.28 1.4125
2020-07-29 2020-06-30 13F At&t COM 00206R102 408,952 356 0.09 12,363 3.79 1.9402
2020-05-01 2020-03-31 13F At&t COM 00206R102 408,596 -1,998 -0.49 11,911 -25.77 2.9180
2020-01-28 2019-12-31 13F At&t COM 00206R102 410,594 7,568 1.88 16,046 5.21 2.5303
2019-10-21 2019-09-30 13F At&t COM 00206R102 403,026 381,405 1,764.05 15,251 2,003.59 2.8606
2019-08-08 2019-06-30 13F At&t COM 00206R102 21,621 996 4.83 725 12.06 0.1631
2019-05-13 2019-03-31 13F At&t COM 00206R102 20,625 2,194 11.90 647 23.00 0.2057
2019-02-13 2018-12-31 13F At&t COM 00206R102 18,431 -6,109 -24.89 526 -36.17 0.2045
2018-11-05 2018-09-30 13F At&t COM 00206R102 24,540 -40,401 -62.21 824 -60.48 0.1183
2018-07-25 2018-06-30 13F At&t COM 00206R102 64,941 30,908 90.82 2,085 71.89 0.3265
2018-05-08 2018-03-31 13F/A-1 At&t COM 00206R102 34,033 5,587 19.64 1,213 9.67 0.1920
2018-05-08 2018-03-31 13F At&t COM 00206R102 28,446 0 1,106
2018-02-05 2017-12-31 13F At&t COM 00206R102 28,446 -383 -1.33 1,106 -2.04 0.1683
2017-10-16 2017-09-30 13F At&t COM 00206R102 28,829 -8,471 -22.71 1,129 -19.76 0.1822
2017-07-18 2017-06-30 13F At&t COM 00206R102 37,300 -1,276 -3.31 1,407 -12.23 0.2298
2017-05-04 2017-03-31 13F At&t COM 00206R102 38,576 -283,339 -88.02 1,603 -88.29 0.2807
2017-02-03 2016-12-31 13F At&t COM 00206R102 321,915 -5,090 -1.56 13,691 3.09 2.6660
2016-11-10 2016-09-30 13F At&t COM 00206R102 327,005 -3,763 -1.14 13,280 -7.09 2.5957
2016-08-11 2016-06-30 13F At&t COM 00206R102 330,768 26,299 8.64 14,293 19.85 2.9535
2016-05-13 2016-03-31 13F At&t COM 00206R102 304,469 -1,830 -0.60 11,926 13.15 3.0752
2016-02-04 2015-12-31 13F At&t COM 00206R102 306,299 218,933 250.59 10,540 259.97 2.2521
2015-11-12 2015-09-30 13F At&t COM 00206R102 87,366 1,556 1.81 2,928 -3.94 0.6869
2015-07-23 2015-06-30 13F At&t COM 00206R102 85,810 -821 -0.95 3,048 7.74 0.6243
2015-05-12 2015-03-31 13F At&t COM 00206R102 86,631 -997 -1.14 2,829 -3.87 0.6084
2015-02-09 2014-12-31 13F At&t COM 00206R102 87,628 2,127 2.49 2,943 -2.32 0.6302
2014-11-13 2014-09-30 13F At&t COM 00206R102 85,501 -5,986 -6.54 3,013 -6.86 0.6709
2014-08-11 2014-06-30 13F At&t COM 00206R102 91,487 150 0.16 3,235 1.00 0.7628
2014-05-12 2014-03-31 13F At&t COM 00206R102 91,337 4,640 5.35 3,203 5.09 0.7780
2014-02-06 2013-12-31 13F At&t COM 00206R102 86,697 -698 -0.80 3,048 3.11 0.7610
2013-11-12 2013-09-30 13F At&t COM 00206R102 87,395 4,663 5.64 2,956 0.92 0.7985
2013-08-01 2013-06-30 13F At&t COM 00206R102 82,732 82,732 2,929 0.8845
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.