The Southern Company
MX ˙ BMV ˙ US8425871071
SecurityMX:SO / The Southern Company
InstitutionThoroughbred Financial Services, Llc
Latest Disclosed Ownership6,052 shares
Latest Disclosed Value $ 584
Thoroughbred Financial Services, Llc reports 0.07% decrease in ownership of SO / The Southern Company

On May 12, 2026 - Thoroughbred Financial Services, Llc filed a 13F-HR form disclosing ownership of 6,052 shares of The Southern Company (MX:SO) valued at $584 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 6,056 shares of The Southern Company.

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 SOUTHERN CO COM Stock 842587107 6,052 -4 -0.07 1 0.0349
2026-02-10 2025-12-31 13F SOUTHERN CO COM Stock 842587107 6,056 -299 -4.70 1 0.0313
2025-11-10 2025-09-30 13F SOUTHERN CO COM Stock 842587107 6,355 6 0.09 1 0.0372
2025-08-08 2025-06-30 13F SOUTHERN COM 842587107 6,349 -3,903 -38.07 1 0.0407
2025-05-09 2025-03-31 13F SOUTHERN COM 842587107 10,252 84 0.83 1 0.0588
2025-02-12 2024-12-31 13F SOUTHERN COM 842587107 10,168 61 0.60 1 0.0512
2024-11-08 2024-09-30 13F SOUTHERN COM 842587107 10,107 -194 -1.88 1 0.0588
2024-08-08 2024-06-30 13F SOUTHERN COM 842587107 10,301 4,565 79.59 1 0.0535
2024-05-07 2024-03-31 13F SOUTHERN COM 842587107 5,736 -4,005 -41.11 0 0.0395
2024-02-09 2023-12-31 13F SOUTHERN COM 842587107 9,741 -212 -2.13 1 0.0552
2023-11-08 2023-09-30 13F SOUTHERN COM 842587107 9,953 3,678 58.61 1 0.0632
2023-08-03 2023-06-30 13F SOUTHERN COM 842587107 6,275 -101 -1.58 0 0.0577
2023-04-24 2023-03-31 13F SOUTHERN COM 842587107 6,376 -18 -0.28 0 0.0654
2023-02-07 2022-12-31 13F SOUTHERN COM 842587107 6,394 104 1.65 0 -100.00 0.0745
2022-10-27 2022-09-30 13F SOUTHERN COM 842587107 6,290 -100 -1.56 427 -6.15 0.0813
2022-08-03 2022-06-30 13F SOUTHERN COM 842587107 6,390 -586 -8.40 455 -9.90 0.0838
2022-05-04 2022-03-31 13F SOUTHERN COM 842587107 6,976 764 12.30 505 18.54 0.0825
2022-02-09 2021-12-31 13F SOUTHERN COM 842587107 6,212 721 13.13 426 25.29 0.0893
2021-10-27 2021-09-30 13F SOUTHERN COM 842587107 5,491 300 5.78 340 8.28 0.0827
2021-07-27 2021-06-30 13F SOUTHERN COM 842587107 5,191 826 18.92 314 15.87 0.0786
2021-04-30 2021-03-31 13F SOUTHERN COM 842587107 4,365 -149 -3.30 271 -2.17 0.0753
2021-01-26 2020-12-31 13F SOUTHERN COM 842587107 4,514 4,514 277 0.0859
2020-07-20 2020-06-30 13F SOUTHERN COM 842587107 0 -3,922 -100.00 0 -100.00
2020-04-23 2020-03-31 13F SOUTHERN COM 842587107 3,922 0 0.00 212 -15.20 0.0755
2020-02-05 2019-12-31 13F SOUTHERN COM 842587107 3,922 150 3.98 250 7.30 0.0832
2019-11-12 2019-09-30 13F SOUTHERN COM 842587107 3,772 0 0.00 233 12.02 0.0884
2019-07-16 2019-06-30 13F/A-1 SOUTHERN CO Total COM 842587107 3,772 3,772 209 0.0792
2019-07-16 2019-06-30 13F SOUTHERN CO Total COM 842587107 208,516 208,516
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.