Atmos Energy Corporation
US ˙ NYSE ˙ US0495601058

SecurityATO / Atmos Energy Corporation
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership7,386 shares
Latest Disclosed Value $ 1,238,148
Parallel Advisors, LLC ownership in ATO / Atmos Energy Corporation

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 7,386 shares of Atmos Energy Corporation (US:ATO) valued at $1,238,115 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 6,263 shares of Atmos Energy Corporation. This represents a change in shares of 17.93% during the quarter. The current value of the position is $1,243,064 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (ATO) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

ATO / Atmos Energy Corporation Historical Put/Call Ratio
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)
2026-02-11 2025-12-31 13F ATMOS ENERGY Stock 049560105 7,386 1,123 17.93 1,238 15.81 0.0226
2025-11-13 2025-09-30 13F ATMOS ENERGY Stock 049560105 6,263 2,172 53.09 1,069 69.68 0.0196
2025-07-08 2025-06-30 13F ATMOS ENERGY Stock 049560105 4,091 1,192 41.12 630 40.63 0.0126
2025-04-08 2025-03-31 13F ATMOS ENERGY Stock 049560105 2,899 921 46.56 448 62.91 0.0101
2025-02-10 2024-12-31 13F ATMOS ENERGY Stock 049560105 1,978 225 12.84 275 13.17 0.0062
2024-11-13 2024-09-30 13F ATMOS ENERGY Stock 049560105 1,753 182 11.58 243 32.79 0.0057
2024-08-08 2024-06-30 13F ATMOS ENERGY Stock 049560105 1,571 265 20.29 183 18.06 0.0047
2024-05-06 2024-03-31 13F ATMOS ENERGY Stock 049560105 1,306 -35 -2.61 155 0.00 0.0042
2024-02-12 2023-12-31 13F ATMOS ENERGY Stock 049560105 1,341 -627 -31.86 155 -25.48 0.0046
2024-05-20 2023-09-30 13F/A-1 ATMOS ENERGY Stock 049560105 1,968 23 1.18 208 -7.96 0.0069
2023-11-14 2023-09-30 13F ATMOS ENERGY Stock 049560105 1,968 23 208 0.0069
2024-05-20 2023-06-30 13F/A-1 ATMOS ENERGY Stock 049560105 1,945 1,213 165.71 226 175.61 0.0073
2023-08-04 2023-06-30 13F ATMOS ENERGY Stock 049560105 1,945 1,213 226 0.0073
2024-05-20 2023-03-31 13F/A-1 ATMOS ENERGY Stock 049560105 732 -4 -0.54 82 0.00 0.0028
2023-04-25 2023-03-31 13F ATMOS ENERGY Stock 049560105 732 -4 82 0.0028
2023-02-06 2022-12-31 13F ATMOS ENERGY Stock 049560105 736 -11 -1.47 82 7.89 0.0036
2022-11-10 2022-09-30 13F ATMOS ENERGY Stock 049560105 747 119 18.95 76 8.57 0.0035
2022-08-01 2022-06-30 13F ATMOS ENERGY Stock 049560105 628 -43 -6.41 70 -13.58 0.0032
2022-04-28 2022-03-31 13F ATMOS ENERGY Stock 049560105 671 -162 -19.45 81 -6.90 0.0032
2022-01-20 2021-12-31 13F ATMOS ENERGY Stock 049560105 833 17 2.08 87 20.83 0.0032
2021-11-02 2021-09-30 13F/A-1 ATMOS ENERGY Stock 049560105 816 58 7.65 72 -1.37 0.0029
2021-08-06 2021-06-30 13F ATMOS ENERGY Stock 049560105 758 269 55.01 73 52.08 0.0031
2021-04-23 2021-03-31 13F ATMOS ENERGY Stock 049560105 489 -427 -46.62 48 -44.83 0.0023
2021-02-02 2020-12-31 13F ATMOS ENERGY Stock 049560105 916 296 47.74 87 47.46 0.0047
2020-10-27 2020-09-30 13F ATMOS ENERGY Stock 049560105 620 -108 -14.84 59 -18.06 0.0037
2020-07-16 2020-06-30 13F ATMOS ENERGY Stock 049560105 728 200 37.88 72 38.46 0.0047
2020-04-27 2020-03-31 13F ATMOS ENERGY Stock 049560105 528 -366 -40.94 52 -48.00 0.0042
2020-01-30 2019-12-31 13F ATMOS ENERGY Stock 049560105 894 -5 -0.56 100 -1.96 0.0075
2019-11-01 2019-09-30 13F ATMOS ENERGY Stock 049560105 899 58 6.90 102 14.61 0.0087
2019-08-05 2019-06-30 13F ATMOS ENERGY Stock 049560105 841 16 1.94 89 4.71 0.0087
2019-05-01 2019-03-31 13F ATMOS ENERGY Stock 049560105 825 430 108.86 85 136.11 0.0095
2019-02-05 2018-12-31 13F ATMOS ENERGY Stock 049560105 395 0 0.00 36 -2.70 0.0050
2018-11-01 2018-09-30 13F ATMOS ENERGY Stock 049560105 395 0 0.00 37 5.71 0.0046
2018-07-30 2018-06-30 13F ATMOS ENERGY Stock 049560105 395 0 0.00 35 6.06 0.0050
2018-05-08 2018-03-31 13F ATMOS ENERGY Stock 049560105 395 -32 -7.49 33 -10.81 0.0052
2018-02-13 2017-12-31 13F ATMOS ENERGY CORP COM Stock 049560105 427 0 0.00 37 -2.63 0.0061
2017-11-15 2017-09-30 13F/A-1 ATMOS ENERGY CORP COM Stock 049560105 427 0 0.00 38 2.70 0.0065
2017-08-07 2017-06-30 13F ATMOS ENERGY CORP COM Stock 049560105 427 0 0.00 37 8.82 0.0070
2017-05-12 2017-03-31 13F/A-1 ATMOS ENERGY CORP COM Stock 049560105 427 -283 -39.86 34 -35.85 0.0068
2017-05-12 2017-03-31 13F ATMOS ENERGY CORP COM Stock 049560105 427 34
2017-02-14 2016-12-31 13F ATMOS ENERGY CORP COM Stock 049560105 710 710 53 0.0124
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F ATMOS ENERGY Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F ATMOS ENERGY Stock Call 758 73 n/a n/a n/a
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.