ONE Gas, Inc.
MX ˙ BMV ˙ US68235P1084
SecurityMX:OGS / ONE Gas, Inc.
InstitutionNorthwestern Mutual Wealth Management Co
Latest Disclosed Ownership8,554 shares
Latest Disclosed Value $ 736,756
Northwestern Mutual Wealth Management Co reports 1.93% decrease in ownership of OGS / ONE Gas, Inc.

On May 7, 2026 - Northwestern Mutual Wealth Management Co filed a 13F-HR form disclosing ownership of 8,554 shares of ONE Gas, Inc. (MX:OGS) valued at $736,756 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 10, 2026 disclosing 8,722 shares of ONE Gas, Inc.. This represents a change in shares of -1.93% 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)
2026-05-07 2026-03-31 13F ONE GAS COM 68235P108 8,554 -168 -1.93 737 9.36 0.0005
2026-02-10 2025-12-31 13F/A-1 ONE GAS COM 68235P108 8,722 7,437 578.75 674 547.12 0.0004
2026-02-05 2025-12-31 13F ONE GAS COM 68235P108 551 -734 11 0.0000
2025-11-14 2025-09-30 13F ONE GAS COM 68235P108 1,285 285 28.50 104 46.48 0.0001
2025-08-13 2025-06-30 13F ONE GAS COM 68235P108 1,000 0 0.00 72 -5.33 0.0001
2025-05-14 2025-03-31 13F ONE GAS COM 68235P108 1,000 0 0.00 76 8.70 0.0001
2025-02-11 2024-12-31 13F ONE GAS COM 68235P108 1,000 0 0.00 69 -6.76 0.0001
2024-11-12 2024-09-30 13F ONE GAS COM 68235P108 1,000 0 0.00 74 17.46 0.0001
2024-08-16 2024-06-30 13F ONE GAS COM 68235P108 1,000 0 0.00 64 -1.56 0.0001
2024-05-15 2024-03-31 13F ONE GAS COM 68235P108 1,000 -102 -9.26 65 -8.57 0.0001
2024-02-13 2023-12-31 13F ONE GAS COM 68235P108 1,102 0 0.00 70 -6.67 0.0001
2023-11-14 2023-09-30 13F ONE GAS COM 68235P108 1,102 -92 -7.71 75 -17.58 0.0001
2023-08-14 2023-06-30 13F ONE GAS COM 68235P108 1,194 0 0.00 92 -3.19 0.0001
2023-05-15 2023-03-31 13F ONE GAS COM 68235P108 1,194 0 0.00 95 4.44 0.0001
2023-02-21 2022-12-31 13F ONE GAS COM 68235P108 1,194 0 0.00 90 7.14 0.0001
2022-11-14 2022-09-30 13F ONE GAS COM 68235P108 1,194 0 0.00 84 -13.40 0.0001
2022-08-04 2022-06-30 13F ONE GAS COM 68235P108 1,194 0 0.00 97 -7.62 0.0002
2022-05-09 2022-03-31 13F ONE GAS COM 68235P108 1,194 0 0.00 105 12.90 0.0002
2022-02-03 2021-12-31 13F ONE GAS COM 68235P108 1,194 -20 -1.65 93 20.78 0.0002
2021-11-15 2021-09-30 13F ONE GAS COM 68235P108 1,214 20 1.68 77 -12.50 0.0001
2021-08-13 2021-06-30 13F ONE GAS COM 68235P108 1,194 217 22.21 88 17.33 0.0002
2021-05-14 2021-03-31 13F ONE GAS COM 68235P108 977 -65 -6.24 75 -6.25 0.0002
2021-02-12 2020-12-31 13F ONE GAS COM 68235P108 1,042 0 0.00 80 11.11 0.0002
2020-11-13 2020-09-30 13F ONE GAS COM 68235P108 1,042 0 0.00 72 -10.00 0.0002
2020-08-14 2020-06-30 13F ONE GAS COM 68235P108 1,042 -12 -1.14 80 -9.09 0.0002
2020-05-08 2020-03-31 13F ONE GAS COM 68235P108 1,054 0 0.00 88 -11.11 0.0003
2020-02-13 2019-12-31 13F ONE GAS COM 68235P108 1,054 92 9.56 99 7.61 0.0003
2019-11-12 2019-09-30 13F ONE GAS COM 68235P108 962 22 2.34 92 8.24 0.0003
2019-08-12 2019-06-30 13F ONE GAS COM 68235P108 940 492 109.82 85 112.50 0.0003
2019-05-10 2019-03-31 13F ONE GAS COM 68235P108 448 30 7.18 40 21.21 0.0002
2019-02-12 2018-12-31 13F ONE GAS COM 68235P108 418 3 0.72 33 -2.94 0.0002
2018-11-01 2018-09-30 13F ONE GAS COM 68235P108 415 0 0.00 34 9.68 0.0002
2018-08-10 2018-06-30 13F ONE GAS COM 68235P108 415 0 0.00 31 14.81 0.0002
2018-05-14 2018-03-31 13F ONE GAS COM 68235P108 415 -17 -3.94 27 -15.62 0.0002
2018-01-31 2017-12-31 13F ONE GAS COM 68235P108 432 17 4.10 32 3.23 0.0002
2017-11-07 2017-09-30 13F ONE GAS COM 68235P108 415 65 18.57 31 29.17 0.0002
2017-08-10 2017-06-30 13F ONE GAS COM 68235P108 350 0 0.00 24 0.00 0.0002
2017-05-09 2017-03-31 13F ONE GAS COM 68235P108 350 0 0.00 24 9.09 0.0002
2017-02-15 2016-12-31 13F ONE GAS COM 68235P108 350 323 1,196.30 22 1,000.00 0.0002
2016-11-14 2016-09-30 13F ONE GAS COM 68235P108 27 27 0.00 2 0.0000
2016-08-29 2016-06-30 13F ONE GAS COM 68235P108 0 -61 -100.00 0 -100.00
2016-05-16 2016-03-31 13F ONE GAS COM 68235P108 61 -27 -30.68 4 0.00 0.0001
2016-02-16 2015-12-31 13F ONE GAS COM 68235P108 88 44 100.00 4 100.00 0.0001
2015-11-16 2015-09-30 13F ONE GAS COM 68235P108 44 44 0.00 2 0.0000
2015-02-13 2014-12-31 13F ONE GAS COM 68235P108 0 -200 -100.00 0 0.0000
2014-11-14 2014-09-30 13F ONE GAS COM 68235P108 200 170 566.67 0 -100.00
2014-08-05 2014-06-30 13F ONE GAS COM 68235P108 30 30 1 0.0000
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.