Atmos Energy Corporation
US ˙ NYSE ˙ US0495601058

SecurityATO / Atmos Energy Corporation
InstitutionEarnest Partners Llc
Latest Disclosed Ownership422,810 shares
Latest Disclosed Value $ 78,101,463
Earnest Partners Llc reports 0.94% decrease in ownership of ATO / Atmos Energy Corporation

On May 15, 2026 - Earnest Partners Llc filed a 13F-HR form disclosing ownership of 422,810 shares of Atmos Energy Corporation (US:ATO) valued at $78,101,463 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 426,836 shares of Atmos Energy Corporation. This represents a change in shares of -0.94% during the quarter. The current value of the position is $71,979,174 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 ATMOS ENERGY COM 049560105 422,810 -4,026 -0.94 78,101 9.16 0.3220
2026-02-12 2025-12-31 13F ATMOS ENERGY COM 049560105 426,836 -12,274 -2.80 71,551 -4.57 0.3066
2025-11-14 2025-09-30 13F ATMOS ENERGY COM 049560105 439,110 -10,319 -2.30 74,978 8.25 0.3253
2025-08-15 2025-06-30 13F ATMOS ENERGY COM 049560105 449,429 -1,619 -0.36 69,262 -0.66 0.3122
2025-05-14 2025-03-31 13F ATMOS ENERGY COM 049560105 451,048 15,415 3.54 69,723 14.92 0.3338
2025-02-14 2024-12-31 13F ATMOS ENERGY COM 049560105 435,633 573 0.13 60,671 0.54 0.2711
2024-11-14 2024-09-30 13F ATMOS ENERGY COM 049560105 435,060 -872 -0.20 60,347 18.67 0.2628
2024-08-14 2024-06-30 13F ATMOS ENERGY COM 049560105 435,932 -2,702 -0.62 50,851 -2.47 0.2377
2024-05-15 2024-03-31 13F ATMOS ENERGY COM 049560105 438,634 7,396 1.72 52,140 4.32 0.2387
2024-02-14 2023-12-31 13F ATMOS ENERGY COM 049560105 431,238 -1,431 -0.33 49,980 9.05 0.2496
2023-11-14 2023-09-30 13F ATMOS ENERGY COM 049560105 432,669 20,193 4.90 45,833 -4.49 0.2643
2023-08-07 2023-06-30 13F ATMOS ENERGY COM 049560105 412,476 167,266 68.21 47,987 74.18 0.2682
2023-05-15 2023-03-31 13F ATMOS ENERGY COM 049560105 245,210 15,117 6.57 27,552 6.84 0.1593
2023-02-14 2022-12-31 13F ATMOS ENERGY COM 049560105 230,093 -58 -0.03 25,787 10.00 0.1580
2022-11-14 2022-09-30 13F ATMOS ENERGY COM 049560105 230,151 46,003 24.98 23,441 13.55 0.1575
2022-08-12 2022-06-30 13F ATMOS ENERGY COM 049560105 184,148 -6,119 -3.22 20,643 -9.20 0.1375
2022-05-16 2022-03-31 13F ATMOS ENERGY COM 049560105 190,267 -2,747 -1.42 22,735 12.43 0.1347
2022-02-07 2021-12-31 13F ATMOS ENERGY COM 049560105 193,014 -1,638 -0.84 20,222 17.79 0.1166
2021-11-15 2021-09-30 13F ATMOS ENERGY COM 049560105 194,652 5,855 3.10 17,168 -5.38 0.1049
2021-08-16 2021-06-30 13F ATMOS ENERGY COM 049560105 188,797 4,684 2.54 18,145 -0.30 0.1066
2021-05-17 2021-03-31 13F ATMOS ENERGY COM 049560105 184,113 -62,739 -25.42 18,200 -22.74 0.1087
2021-02-16 2020-12-31 13F ATMOS ENERGY COM 049560105 246,852 -11,453 -4.43 23,557 -4.59 0.1627
2020-11-16 2020-09-30 13F ATMOS ENERGY COM 049560105 258,305 -2,221 -0.85 24,691 -4.83 0.2130
2020-08-13 2020-06-30 13F ATMOS ENERGY COM 049560105 260,526 -2,988 -1.13 25,943 -0.78 0.2451
2020-05-14 2020-03-31 13F ATMOS ENERGY COM 049560105 263,514 35,476 15.56 26,148 2.51 0.2946
2020-02-07 2019-12-31 13F ATMOS ENERGY COM 049560105 228,038 45,738 25.09 25,508 22.86 0.2005
2019-11-14 2019-09-30 13F ATMOS ENERGY COM 049560105 182,300 22,917 14.38 20,762 23.41 0.1876
2019-08-13 2019-06-30 13F ATMOS ENERGY COM 049560105 159,383 159,274 146,122.94 16,824 152,845.45 0.1520
2019-05-15 2019-03-31 13F ATMOS ENERGY COM 049560105 109 0 0.00 11 10.00 0.0001
2019-02-14 2018-12-31 13F ATMOS ENERGY COM 049560105 109 0 0.00 10 0.00 0.0001
2018-11-14 2018-09-30 13F ATMOS ENERGY COM 049560105 109 0 0.00 10 0.00 0.0001
2018-08-13 2018-06-30 13F ATMOS ENERGY COM 049560105 109 0 0.00 10 11.11 0.0001
2018-05-15 2018-03-31 13F ATMOS ENERGY COM 049560105 109 0 0.00 9 0.00 0.0001
2018-02-14 2017-12-31 13F ATMOS ENERGY COM 049560105 109 109 9 0.0001
2017-05-15 2017-03-31 13F ATMOS ENERGY COM 049560105 0 -109 -100.00 0 -100.00
2017-02-14 2016-12-31 13F ATMOS ENERGY COM 049560105 109 109 8 0.0001
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.