Atmos Energy Corporation
US ˙ NYSE ˙ US0495601058

SecurityATO / Atmos Energy Corporation
InstitutionWhittier Trust Co
Latest Disclosed Ownership13,192 shares
Latest Disclosed Value $ 2,477,590
Whittier Trust Co reports 3.43% decrease in ownership of ATO / Atmos Energy Corporation

On April 28, 2026 - Whittier Trust Co filed a 13F-HR form disclosing ownership of 13,192 shares of Atmos Energy Corporation (US:ATO) valued at $2,436,826 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 13,660 shares of Atmos Energy Corporation. This represents a change in shares of -3.43% during the quarter. The current value of the position is $2,220,214 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)
2026-04-28 2026-03-31 13F ATMOS ENERGY common 049560105 13,192 -468 -3.43 2,478 8.26 0.0280
2026-01-26 2025-12-31 13F ATMOS ENERGY common 049560105 13,660 -118 -0.86 2,289 -2.39 0.0248
2025-10-31 2025-09-30 13F ATMOS ENERGY common 049560105 13,778 -1,312 -8.69 2,345 0.82 0.0267
2025-07-30 2025-06-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 15,090 33 0.22 2,326 -0.09 0.0280
2025-05-02 2025-03-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 15,057 -472 -3.04 2,327 7.63 0.0324
2025-02-11 2024-12-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 15,529 -221 -1.40 2,163 -1.01 0.0285
2024-10-21 2024-09-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 15,750 67 0.43 2,185 19.41 0.0292
2024-07-29 2024-06-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 15,683 -3,486 -18.19 1,829 -19.71 0.0260
2024-05-02 2024-03-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 19,169 129 0.68 2,279 3.26 0.0332
2024-01-11 2023-12-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 19,040 -172 -0.90 2,207 8.40 0.0358
2023-10-27 2023-09-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 19,212 109 0.57 2,035 -8.42 0.0362
2023-07-24 2023-06-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 19,103 -294 -1.52 2,222 1.97 0.0386
2023-04-21 2023-03-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 19,397 -1,439 -6.91 2,179 -6.68 0.0397
2023-01-25 2022-12-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 20,836 -278 -1.32 2,335 8.55 0.0454
2022-10-21 2022-09-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 21,114 -55 -0.26 2,151 -9.36 0.0451
2022-07-28 2022-06-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 21,169 -322 -1.50 2,373 -7.59 0.0479
2022-04-29 2022-03-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 21,491 -2,100 -8.90 2,568 3.88 0.0433
2022-01-19 2021-12-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 23,591 -713 -2.93 2,472 15.35 0.0402
2021-11-01 2021-09-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 24,304 -86 -0.35 2,143 -8.58 0.0390
2021-07-29 2021-06-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 24,390 -1,390 -5.39 2,344 -8.04 0.0418
2021-04-26 2021-03-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 25,780 -508 -1.93 2,549 1.59 0.0495
2021-01-29 2020-12-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 26,288 -948 -3.48 2,509 -3.65 0.0536
2020-10-30 2020-09-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 27,236 -295 -1.07 2,604 -5.03 0.0620
2020-07-10 2020-06-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 27,531 -9,406 -25.46 2,742 -25.18 0.0761
2020-04-27 2020-03-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 36,937 -1,819 -4.69 3,665 -15.46 0.1197
2020-01-31 2019-12-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 38,756 -2,206 -5.39 4,335 -7.07 0.1137
2019-10-18 2019-09-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 40,962 -61 -0.15 4,665 7.74 0.1335
2019-07-23 2019-06-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 41,023 -680 -1.63 4,330 0.86 0.1272
2019-04-29 2019-03-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 41,703 -1,962 -4.49 4,293 6.05 0.1313
2019-02-07 2018-12-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 43,665 -4,891 -10.07 4,048 -11.23 0.1393
2018-10-23 2018-09-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 48,556 -3,936 -7.50 4,560 -3.61 0.1423
2018-07-27 2018-06-30 13F/A-1 ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 52,492 -1,362 -2.53 4,731 4.28 0.1563
2018-07-20 2018-06-30 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 94,296 40,442 5,035
2018-05-01 2018-03-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 53,854 776 1.46 4,537 -0.48 0.1524
2018-02-07 2017-12-31 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 53,078 -16,565 -23.79 4,559 -21.92 0.1590
2017-10-23 2017-09-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 69,643 -1,821 -2.55 5,839 -1.50 0.2128
2017-07-20 2017-06-30 13F ATMOS ENERGY CORP COM US MID-CAP EQUITIES 049560105 71,464 265 0.37 5,928 5.41 0.2292
2017-04-26 2017-03-31 13F ATMOS ENERGY US SMALL AND MID-CAP EQUITIES 049560105 71,199 -9,888 -12.19 5,624 -6.47 0.2269
2017-01-18 2016-12-31 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 81,087 -2,848 -3.39 6,013 -3.81 0.2558
2016-11-10 2016-09-30 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 83,935 -365 -0.43 6,251 -8.81 0.2723
2016-07-28 2016-06-30 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 84,300 -5,554 -6.18 6,855 2.73 0.3020
2016-04-28 2016-03-31 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 89,854 -6,756 -6.99 6,673 9.57 0.2951
2016-02-10 2015-12-31 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 96,610 -3,878 -3.86 6,090 4.17 0.2764
2015-11-12 2015-09-30 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 100,488 -3,350 -3.23 5,846 9.83 0.2843
2015-08-13 2015-06-30 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 103,838 -5,665 -5.17 5,323 -12.07 0.2363
2015-05-05 2015-03-31 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 109,503 109,503 0.00 6,054 0.2775
2015-02-04 2014-12-31 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 0 -111,997 -100.00 0 -100.00
2014-11-07 2014-09-30 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 111,997 7,411 7.09 5,342 -4.33 0.2603
2014-08-04 2014-06-30 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 104,586 -6,143 -5.55 5,584 7.01 0.2753
2014-05-01 2014-03-31 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 110,729 146 0.13 5,218 3.90 0.2674
2014-02-05 2013-12-31 13F ATMOS ENERGY CORP COM US SMALL AND MID-CAP EQUITIES 049560105 110,583 -825 -0.74 5,022 5.84 0.2575
2013-11-18 2013-09-30 13F ATMOS ENERGY COM 049560105 111,408 3,090 2.85 4,745 6.68 0.2567
2013-08-14 2013-06-30 13F ATMOS ENERGY COM 049560105 108,318 108,318 4,448 0.2492
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.