The Southern Company
MX ˙ BMV ˙ US8425871071
SecurityMX:SO / The Southern Company
InstitutionCX Institutional
Latest Disclosed Ownership23,046 shares
Latest Disclosed Value $ 2,224
CX Institutional reports 1.74% decrease in ownership of SO / The Southern Company

On April 6, 2026 - CX Institutional filed a 13F-HR form disclosing ownership of 23,046 shares of The Southern Company (MX:SO) valued at $2,224 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 23,453 shares of The Southern Company. This represents a change in shares of -1.74% 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)
2026-04-06 2026-03-31 13F SOUTHERN COM 842587107 23,046 -407 -1.74 2 0.00 0.0678
2026-02-02 2025-12-31 13F SOUTHERN COM 842587107 23,453 -1,817 -7.19 2 0.00 0.0610
2025-10-23 2025-09-30 13F SOUTHERN COM 842587107 25,270 16,893 201.66 2 0.0727
2025-07-16 2025-06-30 13F/A-1 SOUTHERN COM 842587107 8,377 268 3.30 1 0.0268
2025-07-11 2025-06-30 13F SOUTHERN COM 842587107 8,377 268 1 0.0267
2025-04-15 2025-03-31 13F SOUTHERN COM 842587107 8,109 634 8.48 1 -100.00 0.0282
2025-01-21 2024-12-31 13F SOUTHERN COM 842587107 7,475 1,050 16.34 615 6.22 0.0244
2024-10-11 2024-09-30 13F SOUTHERN COM 842587107 6,425 70 1.10 579 17.68 0.0257
2024-07-11 2024-06-30 13F SOUTHERN COM 842587107 6,355 176 2.85 493 11.06 0.0231
2024-04-15 2024-03-31 13F Southern COM 842587107 6,179 -191 -3.00 443 -0.67 0.0214
2024-01-12 2023-12-31 13F SOUTHERN COM 842587107 6,370 -727 -10.24 447 -2.83 0.0239
2023-10-18 2023-09-30 13F Southern COM 842587107 7,097 -107 -1.49 459 -9.29 0.0253
2023-07-26 2023-06-30 13F SOUTHERN CO COM COM 842587107 7,204 241 3.46 506 5.20 0.0262
2023-05-04 2023-03-31 13F SOUTHERN COM 842587107 6,963 821 13.37 481 9.82 0.0256
2023-02-03 2022-12-31 13F SOUTHERN CO COM COM 842587107 6,142 2,823 85.06 439 93.81 0.0266
2022-11-04 2022-09-30 13F SOUTHERN COM 842587107 3,319 -105 -3.07 226 -7.38 0.0157
2022-08-02 2022-06-30 13F SOUTHERN COM 842587107 3,424 552 19.22 244 17.31 0.0184
2022-05-09 2022-03-31 13F SOUTHERN COM 842587107 2,872 2,872 208 0.0167
2022-01-18 2021-12-31 13F SOUTHERN COM 842587107 0 -2,420 -100.00 0 -100.00
2021-11-10 2021-09-30 13F SOUTHERN COM 842587107 2,420 530 28.04 150 31.58 0.0123
2021-08-04 2021-06-30 13F SOUTHERN COM 842587107 1,890 215 12.84 114 9.62 0.0094
2021-04-15 2021-03-31 13F SOUTHERN COM 842587107 1,675 192 12.95 104 14.29 0.0093
2021-01-12 2020-12-31 13F SOUTHERN COM 842587107 1,483 -1,346 -47.58 91 -40.52 0.0088
2020-10-13 2020-09-30 13F SOUTHERN COM 842587107 2,829 -29,249 -91.18 153 -90.85 0.0165
2020-08-06 2020-06-30 13F SOUTHERN COM 842587107 32,078 8,015 33.31 1,673 28.40 0.2198
2020-04-29 2020-03-31 13F SOUTHERN COM 842587107 24,063 23,665 5,945.98 1,303 5,112.00 0.2126
2020-01-21 2019-12-31 13F SOUTHERN COM 842587107 398 -46 -10.36 25 -7.41 0.0044
2019-10-10 2019-09-30 13F SOUTHERN COM 842587107 444 22 5.21 27 17.39 0.0044
2019-07-17 2019-06-30 13F SOUTHERN COM 842587107 422 -3,060 -87.88 23 -87.22 0.0037
2019-04-03 2019-03-31 13F SOUTHERN COM 842587107 3,482 3,355 2,641.73 180 2,900.00 0.0317
2018-07-12 2018-06-30 13F/A-1 SOUTHERN COM 842587107 127 127 6 0.0022
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.