Atmos Energy Corporation
US ˙ NYSE ˙ US0495601058

SecurityATO / Atmos Energy Corporation
InstitutionWiley Bros.-aintree Capital, Llc
Latest Disclosed Ownership23,067 shares
Latest Disclosed Value $ 4,260,860
Wiley Bros.-aintree Capital, Llc reports 13.38% increase in ownership of ATO / Atmos Energy Corporation

On May 15, 2026 - Wiley Bros.-aintree Capital, Llc filed a 13F-HR form disclosing ownership of 23,067 shares of Atmos Energy Corporation (US:ATO) valued at $4,260,936 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 20,345 shares of Atmos Energy Corporation. This represents a change in shares of 13.38% during the quarter. The current value of the position is $3,882,176 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.

Upgrade to unlock premium data and export to Excel .

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 ATMOS ENERGY COM 049560105 23,067 2,722 13.38 4,261 25.07 0.0211
2026-02-17 2025-12-31 13F ATMOS ENERGY COM 049560105 20,345 2,359 13.12 3,406 10.98 0.0178
2025-11-14 2025-09-30 13F ATMOS ENERGY COM 049560105 17,986 1,628 9.95 3,070 21.74 0.0197
2025-08-14 2025-06-30 13F ATMOS ENERGY COM 049560105 16,358 2,782 20.49 2,522 21.85 0.0193
2025-05-15 2025-03-31 13F ATMOS ENERGY COM 049560105 13,576 654 5.06 2,070 15.14 0.0220
2025-02-14 2024-12-31 13F ATMOS ENERGY COM 049560105 12,922 7,394 133.76 1,798 135.52 0.0216
2024-11-14 2024-09-30 13F ATMOS ENERGY COM 049560105 5,528 -860 -13.46 764 2.42 0.0147
2024-07-24 2024-06-30 13F ATMOS ENERGY COM 049560105 6,388 815 14.62 745 12.54 0.0326
2024-04-11 2024-03-31 13F ATMOS ENERGY COM 049560105 5,573 771 16.06 662 19.06 0.0913
2024-01-09 2023-12-31 13F ATMOS ENERGY COM 049560105 4,802 191 4.14 557 13.93 0.1356
2023-10-06 2023-09-30 13F ATMOS ENERGY COM 049560105 4,611 21 0.46 488 -8.61 0.2280
2023-07-05 2023-06-30 13F ATMOS ENERGY COM 049560105 4,590 21 0.46 534 4.09 0.2391
2023-04-06 2023-03-31 13F ATMOS ENERGY COM 049560105 4,569 -80 -1.72 513 -1.54 0.2468
2023-01-10 2022-12-31 13F ATMOS ENERGY COM 049560105 4,649 21 0.45 521 10.62 0.2587
2022-10-11 2022-09-30 13F ATMOS ENERGY COM 049560105 4,628 21 0.46 471 -8.72 0.2724
2022-07-06 2022-06-30 13F ATMOS ENERGY COM 049560105 4,607 19 0.41 516 -5.84 0.2980
2022-04-26 2022-03-31 13F/A-1 ATMOS ENERGY COM 049560105 4,588 21 0.46 548 14.64 0.3075
2022-04-11 2022-03-31 13F ATMOS ENERGY COM 049560105 4,588 21 548 0.3948
2022-01-12 2021-12-31 13F ATMOS ENERGY COM 049560105 4,567 24 0.53 478 19.20 0.2882
2021-10-07 2021-09-30 13F ATMOS ENERGY COM 049560105 4,543 21 0.46 401 -7.82 0.2549
2021-07-12 2021-06-30 13F ATMOS ENERGY COM 049560105 4,522 20 0.44 435 -2.25 0.2815
2021-04-09 2021-03-31 13F ATMOS ENERGY COM 049560105 4,502 -112 -2.43 445 1.14 0.3238
2021-01-11 2020-12-31 13F ATMOS ENERGY COM 049560105 4,614 22 0.48 440 0.23 0.3697
2020-10-05 2020-09-30 13F ATMOS ENERGY COM 049560105 4,592 4,592 439 0.4463
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.