Atmos Energy Corporation
MX ˙ BMV ˙ US0495601058
SecurityMX:ATO / Atmos Energy Corporation
InstitutionPrincipal Financial Group Inc
Latest Disclosed Ownership507,404 shares
Latest Disclosed Value $ 93,727,668
Principal Financial Group Inc reports 4.35% increase in ownership of ATO / Atmos Energy Corporation

On May 4, 2026 - Principal Financial Group Inc filed a 13F-HR form disclosing ownership of 507,404 shares of Atmos Energy Corporation (MX:ATO) valued at $93,727,668 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 486,229 shares of Atmos Energy Corporation. This represents a change in shares of 4.35% 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)
2026-05-04 2026-03-31 13F ATMOS ENERGY COM 049560105 507,404 21,175 4.35 93,728 14.99 0.0256
2026-02-02 2025-12-31 13F ATMOS ENERGY COM 049560105 486,229 114,836 30.92 81,507 28.53 0.0416
2025-11-04 2025-09-30 13F ATMOS ENERGY COM 049560105 371,393 -5,141 -1.37 63,415 9.29 0.0320
2025-08-08 2025-06-30 13F ATMOS ENERGY COM 049560105 376,534 161,422 75.04 58,028 74.51 0.0307
2025-04-28 2025-03-31 13F ATMOS ENERGY COM 049560105 215,112 -621 -0.29 33,252 10.67 0.0187
2025-01-31 2024-12-31 13F ATMOS ENERGY COM 049560105 215,733 -13,000 -5.68 30,045 -5.30 0.0164
2024-10-31 2024-09-30 13F ATMOS ENERGY COM 049560105 228,733 14,377 6.71 31,728 26.89 0.0175
2024-07-29 2024-06-30 13F ATMOS ENERGY COM 049560105 214,356 -3,727 -1.71 25,005 -3.55 0.0148
2024-04-29 2024-03-31 13F ATMOS ENERGY COM 049560105 218,083 7,442 3.53 25,924 6.19 0.0152
2024-02-07 2023-12-31 13F ATMOS ENERGY COM 049560105 210,641 -3,727 -1.74 24,413 7.51 0.0156
2023-11-02 2023-09-30 13F ATMOS ENERGY COM 049560105 214,368 11,510 5.67 22,708 -3.78 0.0163
2023-08-07 2023-06-30 13F ATMOS ENERGY COM 049560105 202,858 -14,242 -6.56 23,600 -3.25 0.0161
2023-05-09 2023-03-31 13F ATMOS ENERGY COM 049560105 217,100 11,399 5.54 24,393 5.82 0.0174
2023-02-09 2022-12-31 13F ATMOS ENERGY COM 049560105 205,701 -1,212 -0.59 23,053 9.39 0.0174
2022-11-09 2022-09-30 13F ATMOS ENERGY COM 049560105 206,913 -5,571 -2.62 21,074 -11.53 0.0167
2022-08-10 2022-06-30 13F ATMOS ENERGY COM 049560105 212,484 37,684 21.56 23,820 14.05 0.0176
2022-05-09 2022-03-31 13F ATMOS ENERGY COM 049560105 174,800 6,406 3.80 20,886 18.38 0.0083
2022-05-09 2022-03-31 13F ATMOS ENERGY COM 049560105 161,775 19,330
2022-02-09 2021-12-31 13F ATMOS ENERGY COM 049560105 168,394 4,808 2.94 17,643 22.28 0.0105
2021-11-09 2021-09-30 13F ATMOS ENERGY COM 049560105 163,586 1,772 1.10 14,428 -7.23 0.0094
2021-08-10 2021-06-30 13F ATMOS ENERGY COM 049560105 161,814 6,569 4.23 15,552 1.34 0.0100
2021-05-10 2021-03-31 13F ATMOS ENERGY COM 049560105 155,245 -18,300 -10.54 15,346 -7.34 0.0108
2021-02-23 2020-12-31 13F/A-1 ATMOS ENERGY COM 049560105 173,545 -3,886 -2.19 16,561 -2.36 0.0123
2021-02-08 2020-12-31 13F ATMOS ENERGY COM 049560105 173,545 -3,886 16,561 6,515.3526
2020-11-06 2020-09-30 13F ATMOS ENERGY COM 049560105 177,431 -9,544 -5.10 16,961 -8.90 0.0143
2020-08-05 2020-06-30 13F ATMOS ENERGY COM 049560105 186,975 10,016 5.66 18,619 6.03 0.0165
2020-05-12 2020-03-31 13F ATMOS ENERGY COM 049560105 176,959 2,452 1.41 17,560 -10.05 0.0194
2020-02-05 2019-12-31 13F ATMOS ENERGY COM 049560105 174,507 -3,929 -2.20 19,521 -3.94 0.0163
2019-11-13 2019-09-30 13F ATMOS ENERGY COM 049560105 178,436 2,120 1.20 20,322 9.19 0.0179
2019-08-12 2019-06-30 13F ATMOS ENERGY COM 049560105 176,316 -201,139 -53.29 18,612 -52.09 0.0167
2019-05-10 2019-03-31 13F ATMOS ENERGY COM 049560105 377,455 -362,117 -48.96 38,851 -43.34 0.0362
2019-02-14 2018-12-31 13F ATMOS ENERGY COM 049560105 739,572 -24,076 -3.15 68,573 -4.38 0.0731
2018-11-14 2018-09-30 13F ATMOS ENERGY COM 049560105 763,648 -92,094 -10.76 71,714 -7.03 0.0632
2018-08-13 2018-06-30 13F ATMOS ENERGY COM 049560105 855,742 202,931 31.09 77,137 40.27 0.0709
2018-05-14 2018-03-31 13F ATMOS ENERGY COM 049560105 652,811 -21,191 -3.14 54,992 -5.01 0.0529
2018-02-12 2017-12-31 13F ATMOS ENERGY COM 049560105 674,002 20,939 3.21 57,890 5.73 0.0533
2017-11-02 2017-09-30 13F ATMOS ENERGY COM 049560105 653,063 142,352 27.87 54,752 29.24 0.0531
2017-08-08 2017-06-30 13F ATMOS ENERGY COM 049560105 510,711 42,053 8.97 42,363 14.44 0.0425
2017-05-11 2017-03-31 13F ATMOS ENERGY COM 049560105 468,658 -178,446 -27.58 37,019 -22.85 0.0445
2017-02-13 2016-12-31 13F ATMOS ENERGY COM 049560105 647,104 -59,148 -8.37 47,983 -8.77 0.0609
2016-11-10 2016-09-30 13F ATMOS ENERGY COM 049560105 706,252 -47,851 -6.35 52,595 -14.23 0.0695
2016-08-09 2016-06-30 13F ATMOS ENERGY COM 049560105 754,103 223,831 42.21 61,323 55.73 0.0855
2016-05-10 2016-03-31 13F ATMOS ENERGY COM 049560105 530,272 199,573 60.35 39,378 88.89 0.0572
2016-02-09 2015-12-31 13F ATMOS ENERGY COM 049560105 330,699 8,597 2.67 20,847 11.24 0.0310
2015-11-12 2015-09-30 13F/A-1 ATMOS ENERGY COM 049560105 322,102 18,409 6.06 18,740 20.34 0.0294
2015-11-09 2015-09-30 13F ATMOS ENERGY COM 049560105 322,102 18,740
2015-08-10 2015-06-30 13F ATMOS ENERGY COM 049560105 303,693 9,639 3.28 15,573 -4.24 0.0232
2015-05-14 2015-03-31 13F/A-1 ATMOS ENERGY COM 049560105 294,054 8,121 2.84 16,262 2.03 0.0242
2015-05-12 2015-03-31 13F ATMOS ENERGY COM 049560105 294,054 16,261
2015-02-12 2014-12-31 13F ATMOS ENERGY COM 049560105 285,933 10,875 3.95 15,938 21.47 0.0248
2014-11-13 2014-09-30 13F ATMOS ENERGY COM 049560105 275,058 12,824 4.89 13,121 -6.30 0.0223
2014-08-12 2014-06-30 13F ATMOS ENERGY COM 049560105 262,234 -100,449 -27.70 14,003 -18.08 0.0235
2014-05-13 2014-03-31 13F ATMOS ENERGY COM 049560105 362,683 -821,059 -69.36 17,093 -68.21 0.0305
2014-02-12 2013-12-31 13F ATMOS ENERGY COM 049560105 1,183,742 -35,278 -2.89 53,765 3.56 0.1003
2013-11-05 2013-09-30 13F ATMOS ENERGY COM 049560105 1,219,020 365,674 42.85 51,918 48.18 0.1072
2013-08-12 2013-06-30 13F ATMOS ENERGY COM 049560105 853,346 853,346 35,038 0.0776
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.