The Southern Company
MX ˙ BMV ˙ US8425871071
SecurityMX:SO / The Southern Company
InstitutionColonial Trust Advisors
Latest Disclosed Ownership6,416 shares
Latest Disclosed Value $ 619,296
Colonial Trust Advisors reports 1.58% decrease in ownership of SO / The Southern Company

On May 12, 2026 - Colonial Trust Advisors filed a 13F-HR form disclosing ownership of 6,416 shares of The Southern Company (MX:SO) valued at $619,296 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 6,519 shares of The Southern Company. This represents a change in shares of -1.58% 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)
2026-05-12 2026-03-31 13F SOUTHERN CO COM Stock 842587107 6,416 -103 -1.58 619 8.98 0.0481
2026-02-12 2025-12-31 13F SOUTHERN CO COM Stock 842587107 6,519 35 0.54 568 -7.49 0.0428
2025-11-10 2025-09-30 13F SOUTHERN CO COM Stock 842587107 6,484 1,015 18.56 614 22.31 0.0473
2025-08-13 2025-06-30 13F SOUTHERN CO COM Stock 842587107 5,469 187 3.54 502 3.51 0.0415
2025-05-14 2025-03-31 13F SOUTHERN CO COM Stock 842587107 5,282 444 9.18 486 21.86 0.0432
2025-02-13 2024-12-31 13F SOUTHERN CO COM Stock 842587107 4,838 -683 -12.37 398 -19.92 0.0353
2024-11-12 2024-09-30 13F SOUTHERN CO COM Stock 842587107 5,521 -50 -0.90 498 15.05 0.0431
2024-08-14 2024-06-30 13F SOUTHERN CO COM Stock 842587107 5,571 -53 -0.94 432 7.20 0.0414
2024-05-14 2024-03-31 13F SOUTHERN CO COM Stock 842587107 5,624 -6 -0.11 403 2.28 0.0399
2024-02-14 2023-12-31 13F SOUTHERN CO COM Stock 842587107 5,630 -1,843 -24.66 395 -18.43 0.0419
2023-11-13 2023-09-30 13F SOUTHERN CO COM Stock 842587107 7,473 -199 -2.59 484 -10.22 0.0554
2023-08-14 2023-06-30 13F SOUTHERN CO COM Stock 842587107 7,672 -871 -10.20 539 -9.43 0.0599
2023-05-11 2023-03-31 13F SOUTHERN CO COM Stock 842587107 8,543 2,632 44.53 594 40.76 0.0698
2023-02-14 2022-12-31 13F SOUTHERN CO COM Stock 842587107 5,911 -669 -10.17 422 -5.59 0.0518
2022-11-14 2022-09-30 13F SOUTHERN CO COM Stock 842587107 6,580 1,344 25.67 447 19.84 0.0605
2022-08-12 2022-06-30 13F SOUTHERN CS 842587107 5,236 500 10.56 373 8.75 0.0524
2022-05-09 2022-03-31 13F SOUTHERN CS 842587107 4,736 0 0.00 343 5.54 0.0406
2022-02-14 2021-12-31 13F SOUTHERN CS 842587107 4,736 0 0.00 325 10.92 0.0364
2021-11-12 2021-09-30 13F SOUTHERN CS 842587107 4,736 -700 -12.88 293 -10.94 0.0361
2021-08-05 2021-06-30 13F SOUTHERN CS 842587107 5,436 0 0.00 329 -2.66 0.0402
2021-05-10 2021-03-31 13F SOUTHERN CS 842587107 5,436 -452 -7.68 338 -6.63 0.0444
2021-01-29 2020-12-31 13F SOUTHERN CS 842587107 5,888 -200 -3.29 362 9.70 0.0502
2020-10-26 2020-09-30 13F SOUTHERN CS 842587107 6,088 452 8.02 330 13.01 0.0519
2020-08-10 2020-06-30 13F SOUTHERN CS 842587107 5,636 0 0.00 292 -4.26 0.0498
2020-05-06 2020-03-31 13F SOUTHERN CS 842587107 5,636 0 0.00 305 -15.04 0.0638
2020-02-14 2019-12-31 13F SOUTHERN CS 842587107 5,636 0 0.00 359 3.16 0.0596
2019-11-15 2019-09-30 13F SOUTHERN CS 842587107 5,636 0 0.00 348 11.54 0.0615
2019-08-21 2019-06-30 13F SOUTHERN CS 842587107 5,636 93 1.68 312 9.09 0.0565
2019-05-15 2019-03-31 13F SOUTHERN CS 842587107 5,543 275 5.22 286 23.81 0.0543
2019-02-11 2018-12-31 13F SOUTHERN CS 842587107 5,268 -1,275 -19.49 231 -18.95 0.0564
2018-11-14 2018-09-30 13F SOUTHERN CS 842587107 6,543 -219 -3.24 285 -8.95 0.0533
2018-08-14 2018-06-30 13F SOUTHERN CS 842587107 6,762 -254 -3.62 313 0.00 0.0620
2018-05-09 2018-03-31 13F SOUTHERN CS 842587107 7,016 -7,053 -50.13 313 -53.77 0.0638
2018-02-21 2017-12-31 13F SOUTHERN CS 842587107 14,069 4,581 48.28 677 45.28 0.1049
2017-11-14 2017-09-30 13F SOUTHERN CS 842587107 9,488 -666 -6.56 466 -4.12 0.1024
2017-08-14 2017-06-30 13F SOUTHERN CS 842587107 10,154 2,616 34.70 486 29.60 0.1103
2017-05-15 2017-03-31 13F SOUTHERN CS 842587107 7,538 2,828 60.04 375 61.64 0.1154
2017-02-13 2016-12-31 13F SOUTHERN CS 842587107 4,710 0 0.00 232 -4.13 0.0749
2016-10-18 2016-09-30 13F SOUTHERN CS 842587107 4,710 200 4.43 242 0.00 0.0760
2016-08-22 2016-06-30 13F SOUTHERN CS 842587107 4,510 250 5.87 242 10.00 0.0774
2016-05-13 2016-03-31 13F SOUTHERN CS 842587107 4,260 4,260 0.00 220 0.0718
2015-11-18 2015-09-30 13F SOUTHERN CS 842587107 0 0 0 0.0000
2015-08-05 2015-06-30 13F SOUTHERN CS 842587107 0 -42,657 -100.00 0 -100.00
2015-06-01 2015-03-31 13F SOUTHERN CS 842587107 42,657 6,608 18.33 1,889 6.72 0.5771
2015-02-13 2014-12-31 13F SOUTHERN CS 842587107 36,049 -6,475 -15.23 1,770 -4.63 0.6846
2014-11-14 2014-09-30 13F SOUTHERN CS 842587107 42,524 250 0.59 1,856 -3.23 0.5748
2014-08-14 2014-06-30 13F SOUTHERN CS 842587107 42,274 -3,200 -7.04 1,918 -4.00 0.5829
2014-05-15 2014-03-31 13F SOUTHERN CS 842587107 45,474 -1,516 -3.23 1,998 3.42 0.6248
2014-02-14 2013-12-31 13F SOUTHERN CS 842587107 46,990 -5,250 -10.05 1,932 -10.18 0.6068
2013-11-14 2013-09-30 13F SOUTHERN CS 842587107 52,240 -672 -1.27 2,151 -7.88 0.7282
2013-08-14 2013-06-30 13F SOUTHERN CS 842587107 52,912 52,912 2,335 0.8277
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.