Atmos Energy Corporation
MX ˙ BMV ˙ US0495601058
SecurityMX:ATO / Atmos Energy Corporation
InstitutionRhumbline Advisers
Latest Disclosed Ownership353,960 shares
Latest Disclosed Value $ 65,383,378
Rhumbline Advisers reports 1.77% decrease in ownership of ATO / Atmos Energy Corporation

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 353,960 shares of Atmos Energy Corporation (MX:ATO) valued at $65,383,378 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 360,345 shares of Atmos Energy Corporation. This represents a change in shares of -1.77% 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)
2026-05-12 2026-03-31 13F ATMOS ENERGY CORP COM COM 049560105 353,960 -6,385 -1.77 65,383 8.24 0.0559
2026-02-13 2025-12-31 13F ATMOS ENERGY CORP COM COM 049560105 360,345 7,903 2.24 60,405 0.37 0.0488
2025-11-06 2025-09-30 13F ATMOS ENERGY CORP COM COM 049560105 352,442 4,100 1.18 60,179 12.10 0.0483
2025-08-12 2025-06-30 13F ATMOS ENERGY CORP COM COM 049560105 348,342 7,834 2.30 53,683 1.99 0.0460
2025-05-29 2025-03-31 13F/A-1 ATMOS ENERGY CORP COM COM 049560105 340,508 16,140 4.98 52,636 16.52 0.0492
2025-04-08 2025-03-31 13F ATMOS ENERGY CORP COM COM 049560105 340,508 16,140 52,636 0.0492
2025-05-29 2024-12-31 13F/A-1 ATMOS ENERGY CORP COM COM 049560105 324,368 -6,818 -2.06 45,175 -1.66 0.0404
2025-01-30 2024-12-31 13F ATMOS ENERGY CORP COM COM 049560105 324,368 -6,818 45,175 0.0404
2024-11-12 2024-09-30 13F ATMOS ENERGY CORP COM COM 049560105 331,186 -7,080 -2.09 45,939 16.42 0.0414
2024-08-01 2024-06-30 13F ATMOS ENERGY CORP COM COM 049560105 338,266 -6 -0.00 39,459 -1.87 0.0371
2024-05-09 2024-03-31 13F ATMOS ENERGY CORP COM COM 049560105 338,272 21,845 6.90 40,210 9.64 0.0386
2024-02-08 2023-12-31 13F ATMOS ENERGY CORP COM COM 049560105 316,427 371 0.12 36,674 9.54 0.0384
2023-11-09 2023-09-30 13F ATMOS ENERGY CORP COM COM 049560105 316,056 11,734 3.86 33,480 -5.44 0.0389
2023-08-08 2023-06-30 13F ATMOS ENERGY CORP COM COM 049560105 304,322 35,482 13.20 35,405 117,913.33 0.0397
2023-05-11 2023-03-31 13F ATMOS ENERGY CORP COM COM 049560105 268,840 4,476 1.69 30 -99.90 0.0373
2023-02-14 2022-12-31 13F ATMOS ENERGY CORP COM COM 049560105 264,364 14,411 5.77 29,627 16.38 0.0398
2022-11-10 2022-09-30 13F ATMOS ENERGY CORP COM COM 049560105 249,953 7,622 3.15 25,458 -6.28 0.0379
2022-08-11 2022-06-30 13F ATMOS ENERGY CORP COM COM 049560105 242,331 30,331 14.31 27,165 7.24 0.0396
2022-05-12 2022-03-31 13F ATMOS ENERGY CORP COM COM 049560105 212,000 10,048 4.98 25,332 19.72 0.0326
2022-02-10 2021-12-31 13F ATMOS ENERGY CORP COM COM 049560105 201,952 6,151 3.14 21,159 22.52 0.0259
2021-11-12 2021-09-30 13F ATMOS ENERGY CORP COM COM 049560105 195,801 -3,841 -1.92 17,270 -10.00 0.0234
2021-08-05 2021-06-30 13F ATMOS ENERGY CORP COM COM 049560105 199,642 1,157 0.58 19,188 -2.20 0.0252
2021-05-06 2021-03-31 13F ATMOS ENERGY CORP COM COM 049560105 198,485 -10,328 -4.95 19,620 -1.54 0.0267
2021-02-10 2020-12-31 13F ATMOS ENERGY CORP COM COM 049560105 208,813 -17,942 -7.91 19,927 -8.07 0.0275
2020-11-12 2020-09-30 13F ATMOS ENERGY CORP COM COM 049560105 226,755 -7,649 -3.26 21,676 -7.14 0.0340
2020-08-13 2020-06-30 13F ATMOS ENERGY CORP COM COM 049560105 234,404 -28,149 -10.72 23,342 -10.41 0.0390
2020-05-06 2020-03-31 13F ATMOS ENERGY CORP COM COM 049560105 262,553 36,769 16.29 26,053 3.16 0.0546
2020-02-05 2019-12-31 13F ATMOS ENERGY CORP COM COM 049560105 225,784 4,933 2.23 25,256 0.41 0.0422
2019-10-23 2019-09-30 13F ATMOS ENERGY CORP COM COM 049560105 220,851 4,746 2.20 25,153 10.26 0.0460
2019-08-14 2019-06-30 13F ATMOS ENERGY CORP COM COM 049560105 216,105 51,229 31.07 22,812 34.42 0.0428
2019-05-01 2019-03-31 13F ATMOS ENERGY CORP COM COM 049560105 164,876 -131,860 -44.44 16,971 -38.32 0.0329
2019-01-31 2018-12-31 13F ATMOS ENERGY CORP COM COM 049560105 296,736 111,105 59.85 27,513 57.82 0.0599
2018-11-07 2018-09-30 13F ATMOS ENERGY CORP COM COM 049560105 185,631 -1,758 -0.94 17,433 3.21 0.0337
2018-08-06 2018-06-30 13F ATMOS ENERGY CORP COM COM 049560105 187,389 340 0.18 16,891 7.20 0.0341
2018-05-02 2018-03-31 13F ATMOS ENERGY CORP COM COM 049560105 187,049 -1,919 -1.02 15,757 -2.91 0.0329
2018-02-09 2017-12-31 13F ATMOS ENERGY CORP COM COM 049560105 188,968 4,192 2.27 16,230 4.76 0.0330
2017-11-06 2017-09-30 13F ATMOS ENERGY CORP COM COM 049560105 184,776 1,293 0.70 15,492 1.79 0.0337
2017-08-02 2017-06-30 13F ATMOS ENERGY CORP COM COM 049560105 183,483 -7,013 -3.68 15,220 1.15 0.0347
2017-05-02 2017-03-31 13F ATMOS ENERGY CORP COM COM 049560105 190,496 8,913 4.91 15,047 11.76 0.0351
2017-01-27 2016-12-31 13F ATMOS ENERGY CORP COM COM 049560105 181,583 13,450 8.00 13,464 7.53 0.0341
2016-11-08 2016-09-30 13F ATMOS ENERGY CORP COM COM 049560105 168,133 8,433 5.28 12,521 -3.59 0.0345
2016-08-11 2016-06-30 13F ATMOS ENERGY CORP COM COM 049560105 159,700 9,094 6.04 12,987 16.12 0.0385
2016-05-02 2016-03-31 13F ATMOS ENERGY CORP COM 049560105 150,606 5,000 3.43 11,184 21.84 0.0347
2016-02-03 2015-12-31 13F ATMOS ENERGY CORP COM 049560105 145,606 1,960 1.36 9,179 9.84 0.0295
2015-11-04 2015-09-30 13F ATMOS ENERGY CORP COM 049560105 143,646 7,637 5.62 8,357 19.81 0.0284
2015-08-04 2015-06-30 13F ATMOS ENERGY CORP COM 049560105 136,009 -96 -0.07 6,975 -7.33 0.0222
2015-05-12 2015-03-31 13F ATMOS ENERGY CORP COM 049560105 136,105 10,951 8.75 7,527 7.90 0.0217
2015-02-06 2014-12-31 13F ATMOS ENERGY CORP COM 049560105 125,154 3,825 3.15 6,976 20.55 0.0203
2014-11-12 2014-09-30 13F ATMOS ENERGY CORP COM 049560105 121,329 1,260 1.05 5,787 -9.75 0.0174
2014-08-06 2014-06-30 13F ATMOS ENERGY CORP COM 049560105 120,069 -10,431 -7.99 6,412 4.26 0.0188
2014-05-06 2014-03-31 13F ATMOS ENERGY CORP COM 049560105 130,500 6,160 4.95 6,150 8.89 0.0182
2014-02-03 2013-12-31 13F ATMOS ENERGY CORP COM 049560105 124,340 -9,729 -7.26 5,648 -1.09 0.0167
2013-11-05 2013-09-30 13F ATMOS ENERGY CORP COM 049560105 134,069 -1,356 -1.00 5,710 2.68 0.0177
2013-08-07 2013-06-30 13F ATMOS ENERGY CORP COM 049560105 135,425 135,425 5,561 0.0179
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.