ONE Gas, Inc.
US ˙ NYSE ˙ US68235P1084

SecurityOGS / ONE Gas, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership201,803 shares
Latest Disclosed Value $ 17,381,265
Rhumbline Advisers reports 0.34% increase in ownership of OGS / ONE Gas, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 201,803 shares of ONE Gas, Inc. (US:OGS) valued at $17,381,292 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 201,123 shares of ONE Gas, Inc.. This represents a change in shares of 0.34% during the quarter. The current value of the position is $15,498,470 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.

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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 ONE GAS INC COM COM 68235P108 201,803 680 0.34 17,381 11.88 0.0149
2026-02-13 2025-12-31 13F ONE GAS INC COM COM 68235P108 201,123 -15,090 -6.98 15,537 -11.22 0.0126
2025-11-06 2025-09-30 13F ONE GAS INC COM COM 68235P108 216,213 -4,438 -2.01 17,500 10.38 0.0141
2025-08-12 2025-06-30 13F ONE GAS INC COM COM 68235P108 220,651 16,249 7.95 15,856 2.62 0.0136
2025-05-29 2025-03-31 13F/A-1 ONE GAS INC COM COM 68235P108 204,402 -3,896 -1.87 15,451 7.11 0.0145
2025-04-08 2025-03-31 13F ONE GAS INC COM COM 68235P108 204,402 -3,896 15,451 0.0145
2025-05-29 2024-12-31 13F/A-1 ONE GAS INC COM COM 68235P108 208,298 3,828 1.87 14,425 -5.21 0.0129
2025-01-30 2024-12-31 13F ONE GAS INC COM COM 68235P108 208,298 3,828 14,425 0.0129
2024-11-12 2024-09-30 13F ONE GAS INC COM COM 68235P108 204,470 -5,951 -2.83 15,217 13.26 0.0137
2024-08-01 2024-06-30 13F ONE GAS INC COM COM 68235P108 210,421 7,680 3.79 13,435 2.70 0.0126
2024-05-09 2024-03-31 13F ONE GAS INC COM COM 68235P108 202,741 1,508 0.75 13,083 2.03 0.0126
2024-02-08 2023-12-31 13F ONE GAS INC COM COM 68235P108 201,233 157 0.08 12,823 -6.61 0.0134
2023-11-09 2023-09-30 13F ONE GAS INC COM COM 68235P108 201,076 -378 -0.19 13,729 -11.27 0.0159
2023-08-08 2023-06-30 13F ONE GAS INC COM COM 68235P108 201,454 11,687 6.16 15,474 103,053.33 0.0173
2023-05-11 2023-03-31 13F ONE GAS INC COM COM 68235P108 189,767 849 0.45 15 -99.90 0.0186
2023-02-14 2022-12-31 13F ONE GAS INC COM COM 68235P108 188,918 -214 -0.11 14,305 7.45 0.0192
2022-11-10 2022-09-30 13F ONE GAS INC COM COM 68235P108 189,132 6,977 3.83 13,313 -9.98 0.0198
2022-08-11 2022-06-30 13F ONE GAS INC COM COM 68235P108 182,155 15,703 9.43 14,789 0.69 0.0216
2022-05-12 2022-03-31 13F ONE GAS INC COM COM 68235P108 166,452 -3,110 -1.83 14,688 11.64 0.0189
2022-02-10 2021-12-31 13F ONE GAS INC COM COM 68235P108 169,562 1,408 0.84 13,156 23.46 0.0161
2021-11-12 2021-09-30 13F ONE GAS INC COM COM 68235P108 168,154 611 0.36 10,656 -14.19 0.0144
2021-08-05 2021-06-30 13F ONE GAS INC COM COM 68235P108 167,543 -5,776 -3.33 12,418 -6.84 0.0163
2021-05-06 2021-03-31 13F ONE GAS INC COM COM 68235P108 173,319 -4,777 -2.68 13,330 -2.50 0.0181
2021-02-10 2020-12-31 13F ONE GAS INC COM COM 68235P108 178,096 16,011 9.88 13,672 22.24 0.0189
2020-11-12 2020-09-30 13F ONE GAS INC COM COM 68235P108 162,085 -21,468 -11.70 11,185 -20.91 0.0175
2020-08-13 2020-06-30 13F ONE GAS INC COM COM 68235P108 183,553 818 0.45 14,143 -7.44 0.0236
2020-05-06 2020-03-31 13F ONE GAS INC COM COM 68235P108 182,735 6,925 3.94 15,280 -7.12 0.0320
2020-02-05 2019-12-31 13F ONE GAS INC COM COM 68235P108 175,810 2,940 1.70 16,451 -0.99 0.0275
2019-10-23 2019-09-30 13F ONE GAS INC COM COM 68235P108 172,870 4,183 2.48 16,615 9.08 0.0304
2019-08-14 2019-06-30 13F ONE GAS INC COM COM 68235P108 168,687 466 0.28 15,232 1.70 0.0286
2019-05-01 2019-03-31 13F ONE GAS INC COM COM 68235P108 168,221 3,258 1.97 14,977 14.06 0.0290
2019-01-31 2018-12-31 13F ONE GAS INC COM COM 68235P108 164,963 63,492 62.57 13,131 57.28 0.0286
2018-11-07 2018-09-30 13F ONE GAS INC COM COM 68235P108 101,471 -699 -0.68 8,349 9.34 0.0161
2018-08-06 2018-06-30 13F ONE GAS INC COM COM 68235P108 102,170 -1,177 -1.14 7,636 11.92 0.0154
2018-05-02 2018-03-31 13F ONE GAS INC COM COM 68235P108 103,347 -5,699 -5.23 6,823 -14.60 0.0143
2018-02-09 2017-12-31 13F ONE GAS INC COM COM 68235P108 109,046 -3,272 -2.91 7,989 -3.41 0.0162
2017-11-06 2017-09-30 13F ONE GAS INC COM COM 68235P108 112,318 1,095 0.98 8,271 6.53 0.0180
2017-08-02 2017-06-30 13F ONE GAS INC COM COM 68235P108 111,223 1,377 1.25 7,764 4.55 0.0177
2017-05-02 2017-03-31 13F ONE GAS INC COM COM 68235P108 109,846 1,598 1.48 7,426 7.25 0.0173
2017-01-27 2016-12-31 13F ONE GAS INC COM COM 68235P108 108,248 -1,753 -1.59 6,924 1.79 0.0175
2016-11-08 2016-09-30 13F ONE GAS INC COM COM 68235P108 110,001 1,765 1.63 6,802 -5.62 0.0187
2016-08-11 2016-06-30 13F ONE GAS INC COM COM 68235P108 108,236 -17,636 -14.01 7,207 -6.29 0.0214
2016-05-02 2016-03-31 13F ONE GAS COM 68235P108 125,872 9,720 8.37 7,691 31.99 0.0239
2016-02-03 2015-12-31 13F ONE GAS COM 68235P108 116,152 1,690 1.48 5,827 12.30 0.0188
2015-11-04 2015-09-30 13F ONE GAS COM 68235P108 114,462 6,415 5.94 5,189 12.85 0.0177
2015-08-04 2015-06-30 13F ONE GAS COM 68235P108 108,047 2,795 2.66 4,598 1.05 0.0147
2015-05-12 2015-03-31 13F ONE GAS COM 68235P108 105,252 4,810 4.79 4,550 9.90 0.0131
2015-02-06 2014-12-31 13F ONE GAS COM 68235P108 100,442 4,875 5.10 4,140 26.49 0.0120
2014-11-12 2014-09-30 13F ONE GAS COM 68235P108 95,567 40 0.04 3,273 -9.23 0.0098
2014-08-06 2014-06-30 13F ONE GAS COM 68235P108 95,527 18,445 23.93 3,606 30.18 0.0106
2014-05-06 2014-03-31 13F ONE GAS COM 68235P108 77,082 77,082 2,770 0.0082
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.