阿特莫斯能源公司
MX ˙ BMV ˙ US0495601058
SecurityMX:ATO / Atmos Energy Corporation
InstitutionMagellan Asset Management Ltd
ManagerHamish Douglass
Latest Disclosed Ownership181,367 shares
Latest Disclosed Value $ 33,502,112
Magellan Asset Management Ltd reports 30.90% increase in ownership of ATO / Atmos Energy Corporation

On May 11, 2026 - Magellan Asset Management Ltd filed a 13F-HR form disclosing ownership of 181,367 shares of Atmos Energy Corporation (MX:ATO) valued at $33,502,112 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 138,554 shares of Atmos Energy Corporation. This represents a change in shares of 30.90% 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.

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)
2026-05-11 2026-03-31 13F ATMOS ENERGY COM 049560105 181,367 42,813 30.90 33,502 44.25 0.4347
2026-02-10 2025-12-31 13F ATMOS ENERGY COM 049560105 138,554 7,991 6.12 23,226 4.18 0.2823
2025-11-10 2025-09-30 13F ATMOS ENERGY COM 049560105 130,563 14,304 12.30 22,294 24.43 0.2640
2025-08-07 2025-06-30 13F ATMOS ENERGY COM 049560105 116,259 -629 -0.54 17,917 -0.84 0.2048
2025-05-12 2025-03-31 13F ATMOS ENERGY COM 049560105 116,888 -1,283 -1.09 18,069 9.79 0.2197
2025-02-12 2024-12-31 13F ATMOS ENERGY COM 049560105 118,171 -20,009 -14.48 16,458 -14.13 0.1808
2024-11-14 2024-09-30 13F ATMOS ENERGY COM 049560105 138,180 -2,769 -1.96 19,167 16.57 0.1908
2024-08-13 2024-06-30 13F ATMOS ENERGY COM 049560105 140,949 14,836 11.76 16,442 9.67 0.1565
2024-05-14 2024-03-31 13F ATMOS ENERGY COM 049560105 126,113 614 0.49 14,991 3.07 0.1432
2024-02-13 2023-12-31 13F ATMOS ENERGY COM 049560105 125,499 4,287 3.54 14,545 13.29 0.1449
2023-11-13 2023-09-30 13F ATMOS ENERGY COM 049560105 121,212 8,038 7.10 12,840 -2.48 0.1365
2023-08-11 2023-06-30 13F ATMOS ENERGY COM 049560105 113,174 6,156 5.75 13,167 9.50 0.1172
2023-05-12 2023-03-31 13F ATMOS ENERGY COM 049560105 107,018 2,131 2.03 12,025 2.30 0.1027
2023-02-13 2022-12-31 13F ATMOS ENERGY COM 049560105 104,887 -4,097 -3.76 11,755 5.89 0.1006
2022-11-10 2022-09-30 13F ATMOS ENERGY COM 049560105 108,984 6,439 6.28 11,100 -3.44 0.0776
2022-08-12 2022-06-30 13F ATMOS ENERGY COM 049560105 102,545 -968,437 -90.43 11,495 -91.02 0.0627
2022-05-13 2022-03-31 13F ATMOS ENERGY COM 049560105 1,070,982 -1,160,620 -52.01 127,972 -45.27 0.4955
2022-02-11 2021-12-31 13F ATMOS ENERGY COM 049560105 2,231,602 -1,629,641 -42.21 233,805 -31.35 0.5956
2021-11-04 2021-09-30 13F ATMOS ENERGY COM 049560105 3,861,243 -42,556 -1.09 340,562 -9.23 0.6805
2021-08-12 2021-06-30 13F ATMOS ENERGY COM 049560105 3,903,799 19,477 0.50 375,194 -2.28 0.7426
2021-05-13 2021-03-31 13F ATMOS ENERGY COM 049560105 3,884,322 90,822 2.39 383,965 6.06 0.8032
2021-02-11 2020-12-31 13F ATMOS ENERGY COM 049560105 3,793,500 303,022 8.68 362,014 8.50 0.8374
2020-11-12 2020-09-30 13F ATMOS ENERGY COM 049560105 3,490,478 -193,128 -5.24 333,655 -9.04 0.8512
2020-08-14 2020-06-30 13F ATMOS ENERGY COM 049560105 3,683,606 -1,714 -0.05 366,814 0.31 1.0987
2020-05-14 2020-03-31 13F ATMOS ENERGY COM 049560105 3,685,320 -215,672 -5.53 365,694 -16.20 1.2589
2020-02-13 2019-12-31 13F ATMOS ENERGY COM 049560105 3,900,992 342,025 9.61 436,365 7.66 1.1491
2019-11-13 2019-09-30 13F ATMOS ENERGY COM 049560105 3,558,967 647,574 22.24 405,331 31.89 1.1652
2019-08-13 2019-06-30 13F ATMOS ENERGY COM 049560105 2,911,393 199,331 7.35 307,327 10.09 0.8845
2019-05-14 2019-03-31 13F ATMOS ENERGY COM 049560105 2,712,062 137,651 5.35 279,153 16.95 0.8859
2019-03-11 2018-12-31 13F/A-1 ATMOS ENERGY COM 049560105 2,574,411 485,347 23.23 238,699 21.67 0.8771
2019-02-14 2018-12-31 13F ATMOS ENERGY COM 049560105 2,574,411 485,347 238,699
2018-11-14 2018-09-30 13F ATMOS ENERGY COM 049560105 2,089,064 170,894 8.91 196,184 13.46 0.6415
2018-08-13 2018-06-30 13F ATMOS ENERGY COM 049560105 1,918,170 211,446 12.39 172,904 20.26 0.6066
2018-05-15 2018-03-31 13F ATMOS ENERGY COM 049560105 1,706,724 319,415 23.02 143,774 20.66 0.5305
2018-02-14 2017-12-31 13F ATMOS ENERGY COM 049560105 1,387,309 293,071 26.78 119,156 29.88 0.3961
2017-11-13 2017-09-30 13F ATMOS ENERGY COM 049560105 1,094,238 33,823 3.19 91,741 4.30 0.3456
2017-08-11 2017-06-30 13F ATMOS ENERGY COM 049560105 1,060,415 62,854 6.30 87,961 11.34 0.3690
2017-05-16 2017-03-31 13F ATMOS ENERGY COM 049560105 997,561 377,996 61.01 79,000 71.96 0.3487
2017-02-15 2016-12-31 13F ATMOS ENERGY COM 049560105 619,565 25,313 4.26 45,941 3.81 0.2155
2016-11-14 2016-09-30 13F ATMOS ENERGY COM 049560105 594,252 280,951 89.67 44,254 73.69 0.2219
2016-08-19 2016-06-30 13F ATMOS ENERGY COM 049560105 313,301 -87,464 -21.82 25,478 -14.39 0.1430
2016-05-13 2016-03-31 13F ATMOS ENERGY COM 049560105 400,765 14,727 3.81 29,761 22.29 0.1604
2016-02-11 2015-12-31 13F ATMOS ENERGY COM 049560105 386,038 197,602 104.86 24,336 121.98 0.1363
2015-11-10 2015-09-30 13F ATMOS ENERGY COM 049560105 188,436 12,086 6.85 10,963 21.23 0.0688
2015-08-13 2015-06-30 13F ATMOS ENERGY COM 049560105 176,350 17,599 11.09 9,043 3.01 0.0568
2015-05-12 2015-03-31 13F ATMOS ENERGY COM 049560105 158,751 -3,915 -2.41 8,779 -3.18 0.0565
2015-02-12 2014-12-31 13F ATMOS ENERGY COM 049560105 162,666 -17,956 -9.94 9,067 5.23 0.0646
2014-11-13 2014-09-30 13F ATMOS ENERGY COM 049560105 180,622 9,275 5.41 8,616 -5.84 0.0678
2014-08-12 2014-06-30 13F ATMOS ENERGY COM 049560105 171,347 -44,146 -20.49 9,150 -9.91 0.0690
2014-05-14 2014-03-31 13F ATMOS ENERGY COM 049560105 215,493 11,425 5.60 10,156 9.57 0.0799
2014-02-11 2013-12-31 13F ATMOS ENERGY COM 049560105 204,068 -224,030 -52.33 9,269 -49.16 0.0765
2013-11-13 2013-09-30 13F ATMOS ENERGY COM 049560105 428,098 -175,368 -29.06 18,233 -26.41 0.1962
2013-08-21 2013-06-30 13F ATMOS ENERGY COM 049560105 603,466 603,466 24,778 0.2763
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.