The Southern Company
MX ˙ BMV ˙ US8425871071
SecurityMX:SO / The Southern Company
InstitutionHaverford Trust Co
Latest Disclosed Ownership12,486 shares
Latest Disclosed Value $ 1,205,149
Haverford Trust Co reports 13.30% increase in ownership of SO / The Southern Company

On May 11, 2026 - Haverford Trust Co filed a 13F-HR form disclosing ownership of 12,486 shares of The Southern Company (MX:SO) valued at $1,205,149 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 11,020 shares of The Southern Company. This represents a change in shares of 13.30% 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)
2026-05-11 2026-03-31 13F SOUTHERN COM 842587107 12,486 1,466 13.30 1,205 25.52 0.0110
2026-02-13 2025-12-31 13F SOUTHERN COM 842587107 11,020 726 7.05 961 -1.54 0.0086
2025-11-14 2025-09-30 13F SOUTHERN COM 842587107 10,294 191 1.89 976 5.18 0.0088
2025-08-13 2025-06-30 13F SOUTHERN COM 842587107 10,103 -20 -0.20 928 -0.32 0.0088
2025-05-14 2025-03-31 13F SOUTHERN COM 842587107 10,123 1,685 19.97 931 34.01 0.0094
2025-02-11 2024-12-31 13F SOUTHERN COM 842587107 8,438 1,766 26.47 695 15.47 0.0069
2024-11-05 2024-09-30 13F SOUTHERN COM 842587107 6,672 306 4.81 602 21.91 0.0059
2024-08-13 2024-06-30 13F SOUTHERN COM 842587107 6,366 940 17.32 494 26.74 0.0052
2024-05-02 2024-03-31 13F SOUTHERN COM 842587107 5,426 -1,750 -24.39 389 -22.66 0.0041
2024-02-08 2023-12-31 13F SOUTHERN COM 842587107 7,176 0 0.00 503 8.41 0.0056
2023-11-09 2023-09-30 13F SOUTHERN COM 842587107 7,176 0 0.00 464 -7.94 0.0057
2023-08-08 2023-06-30 13F SOUTHERN COM 842587107 7,176 51 0.72 504 1.82 0.0057
2023-05-12 2023-03-31 13F SOUTHERN COM 842587107 7,125 584 8.93 496 6.00 0.0059
2023-02-13 2022-12-31 13F SOUTHERN COM 842587107 6,541 -5,245 -44.50 467 -41.70 0.0058
2022-11-14 2022-09-30 13F SOUTHERN COM 842587107 11,786 -176 -1.47 801 -6.10 0.0110
2022-08-12 2022-06-30 13F SOUTHERN COM 842587107 11,962 -1,167 -8.89 853 -10.40 0.0111
2022-05-05 2022-03-31 13F SOUTHERN COM 842587107 13,129 2,661 25.42 952 32.59 0.0110
2022-02-14 2021-12-31 13F SOUTHERN COM 842587107 10,468 -699 -6.26 718 3.76 0.0078
2021-11-12 2021-09-30 13F SOUTHERN COM 842587107 11,167 4,275 62.03 692 65.95 0.0083
2021-08-16 2021-06-30 13F/A-1 SOUTHERN COM 842587107 6,892 -724 -9.51 417 -11.84 0.0049
2021-08-16 2021-06-30 13F SOUTHERN COM 842587107 417 -7,199 417 0.0049
2021-05-12 2021-03-31 13F SOUTHERN COM 842587107 7,616 352 4.85 473 6.05 0.0061
2021-02-05 2020-12-31 13F SOUTHERN COM 842587107 7,264 -1,097 -13.12 446 -1.55 0.0063
2020-11-10 2020-09-30 13F SOUTHERN COM 842587107 8,361 -467 -5.29 453 -1.09 0.0072
2020-08-13 2020-06-30 13F SOUTHERN COM 842587107 8,828 -742 -7.75 458 -11.58 0.0079
2020-05-11 2020-03-31 13F SOUTHERN COM 842587107 9,570 -152 -1.56 518 -16.32 0.0105
2020-02-10 2019-12-31 13F SOUTHERN COM 842587107 9,722 910 10.33 619 13.79 0.0100
2019-11-04 2019-09-30 13F SOUTHERN COM 842587107 8,812 -398 -4.32 544 6.88 0.0095
2019-08-13 2019-06-30 13F SOUTHERN COM 842587107 9,210 747 8.83 509 16.48 0.0091
2019-05-09 2019-03-31 13F SOUTHERN COM 842587107 8,463 -145 -1.68 437 15.61 0.0081
2019-02-12 2018-12-31 13F SOUTHERN COM 842587107 8,608 -2,657 -23.59 378 -23.01 0.0080
2018-11-08 2018-09-30 13F SOUTHERN COM 842587107 11,265 -935 -7.66 491 -13.10 0.0091
2018-08-10 2018-06-30 13F SOUTHERN COM 842587107 12,200 -107 -0.87 565 2.73 0.0112
2018-05-09 2018-03-31 13F SOUTHERN COM 842587107 12,307 703 6.06 550 -1.43 0.0110
2018-02-13 2017-12-31 13F SOUTHERN COM 842587107 11,604 1,329 12.93 558 10.50 0.0110
2017-11-09 2017-09-30 13F SOUTHERN COM 842587107 10,275 92 0.90 505 3.48 0.0105
2017-08-14 2017-06-30 13F SOUTHERN COM 842587107 10,183 1,645 19.27 488 14.82 0.0106
2017-05-05 2017-03-31 13F SOUTHERN COM 842587107 8,538 -48 -0.56 425 0.71 0.0097
2017-02-10 2016-12-31 13F SOUTHERN COM 842587107 8,586 229 2.74 422 -1.63 0.0102
2016-11-14 2016-09-30 13F SOUTHERN COM 842587107 8,357 361 4.51 429 0.00 0.0107
2016-08-04 2016-06-30 13F SOUTHERN COM 842587107 7,996 263 3.40 429 7.25 0.0108
2016-05-10 2016-03-31 13F SOUTHERN COM 842587107 7,733 -294 -3.66 400 6.38 0.0104
2016-02-09 2015-12-31 13F SOUTHERN COM 842587107 8,027 -7,331 -47.73 376 -45.27 0.0101
2015-11-10 2015-09-30 13F SOUTHERN COM 842587107 15,358 3,275 27.10 687 35.77 0.0200
2015-07-30 2015-06-30 13F SOUTHERN COM 842587107 12,083 0 0.00 506 -5.42 0.0139
2015-05-05 2015-03-31 13F/A-1 SOUTHERN COM 842587107 12,083 1,900 18.66 535 7.00 0.0148
2015-05-04 2015-03-31 13F SOUTHERN COM 842587107 45,649 535
2015-02-09 2014-12-31 13F SOUTHERN COM 842587107 10,183 0 0.00 500 12.61 0.0140
2014-11-05 2014-09-30 13F SOUTHERN COM 842587107 10,183 1,600 18.64 444 14.14 0.0133
2014-08-01 2014-06-30 13F SOUTHERN COM 842587107 8,583 -530 -5.82 389 -2.75 0.0114
2014-05-08 2014-03-31 13F SOUTHERN COM 842587107 9,113 -2,920 -24.27 400 -19.19 0.0124
2014-01-31 2013-12-31 13F SOUTHERN Common Stocks 842587107 12,033 0 0.00 495 0.00 0.0139
2013-11-01 2013-09-30 13F SOUTHERN Common Stocks 842587107 12,033 -200 -1.63 495 -8.33 0.0180
2013-07-31 2013-06-30 13F SOUTHERN Common Stocks 842587107 12,233 12,233 540 0.0178
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.