The Southern Company
IT ˙ BIT ˙ US8425871071
78,00 € 0,00 (0,00%)
2026-06-03
DEL PRIS
SecurityIT:1SO / The Southern Company
InstitutionQuantinno Capital Management LP
Latest Disclosed Ownership459,563 shares
Latest Disclosed Value $ 44,357,107
Quantinno Capital Management LP reports 35.47% increase in ownership of 1SO / The Southern Company

On May 15, 2026 - Quantinno Capital Management LP filed a 13F-HR form disclosing ownership of 459,563 shares of The Southern Company (IT:1SO) valued at $39,655,691 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 339,247 shares of The Southern Company. This represents a change in shares of 35.47% during the quarter. The current value of the position is $35,845,914 USD.

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)
2026-05-15 2026-03-31 13F SOUTHERN COM 842587107 459,563 120,316 35.47 44,357 49.95 0.0740
2026-02-17 2025-12-31 13F SOUTHERN COM 842587107 339,247 40,760 13.66 29,582 4.58 0.0594
2025-11-14 2025-09-30 13F SOUTHERN COM 842587107 298,487 96,611 47.86 28,288 52.59 0.0772
2025-08-14 2025-06-30 13F SOUTHERN COM 842587107 201,876 50,450 33.32 18,538 33.15 0.0801
2025-05-12 2025-03-31 13F SOUTHERN COM 842587107 151,426 56,933 60.25 13,924 79.00 0.0907
2025-02-14 2024-12-31 13F SOUTHERN COM 842587107 94,493 19,410 25.85 7,779 14.87 0.0765
2024-11-14 2024-09-30 13F SOUTHERN COM 842587107 75,083 10,057 15.47 6,771 34.24 0.0880
2024-08-14 2024-06-30 13F SOUTHERN COM 842587107 65,026 6,151 10.45 5,044 19.41 0.0907
2024-05-14 2024-03-31 13F SOUTHERN COM 842587107 58,875 5,251 9.79 4,224 12.34 0.0918
2024-02-14 2023-12-31 13F SOUTHERN COM 842587107 53,624 16,088 42.86 3,760 54.80 0.1316
2023-11-14 2023-09-30 13F SOUTHERN COM 842587107 37,536 8,797 30.61 2,429 20.31 0.1106
2023-08-04 2023-06-30 13F SOUTHERN COM 842587107 28,739 4,903 20.57 2,019 21.70 0.1153
2023-05-03 2023-03-31 13F SOUTHERN COM 842587107 23,836 2,080 9.56 1,659 6.76 0.1097
2023-02-13 2022-12-31 13F SOUTHERN COM 842587107 21,756 16,569 319.43 1,554 340.23 0.1159
2022-11-08 2022-09-30 13F SOUTHERN COM 842587107 5,187 1,549 42.58 353 36.29 0.0455
2022-08-15 2022-06-30 13F SOUTHERN COM 842587107 3,638 3,638 259 0.0374
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.