ONE Gas, Inc.
US ˙ NYSE ˙ US68235P1084

SecurityOGS / ONE Gas, Inc.
InstitutionCerity Partners LLC
Latest Disclosed Ownership33,440 shares
Latest Disclosed Value $ 2,880,196
Cerity Partners LLC reports 86.32% increase in ownership of OGS / ONE Gas, Inc.

On May 15, 2026 - Cerity Partners LLC filed a 13F-HR form disclosing ownership of 33,440 shares of ONE Gas, Inc. (US:OGS) valued at $2,880,187 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 17,948 shares of ONE Gas, Inc.. This represents a change in shares of 86.32% during the quarter. The current value of the position is $2,568,192 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)
2026-05-15 2026-03-31 13F ONE GAS COM 68235P108 33,440 15,492 86.32 2,880 107.79 0.0020
2026-02-11 2025-12-31 13F ONE GAS COM 68235P108 17,948 1,384 8.36 1,386 3.43 0.0020
2025-10-22 2025-09-30 13F ONE GAS Stock 68235P108 16,564 7,058 74.25 1,341 96.19 0.0022
2025-08-13 2025-06-30 13F ONE GAS Stock 68235P108 9,506 -269 -2.75 683 -7.45 0.0012
2025-04-30 2025-03-31 13F ONE GAS Stock 68235P108 9,775 -23,154 -70.31 739 -68.26 0.0015
2025-02-13 2024-12-31 13F ONE GAS Stock 68235P108 32,929 -1,615 -4.68 2,326 -9.53 0.0050
2024-11-12 2024-09-30 13F ONE GAS Stock 68235P108 34,544 1,884 5.77 2,571 23.26 0.0057
2024-08-13 2024-06-30 13F ONE GAS Stock 68235P108 32,660 -2,262 -6.48 2,085 -7.46 0.0055
2024-05-14 2024-03-31 13F ONE GAS Stock 68235P108 34,922 14,182 68.38 2,254 70.55 0.0060
2024-01-26 2023-12-31 13F ONE GAS Stock 68235P108 20,740 -3,944 -15.98 1,322 -21.60 0.0043
2023-11-14 2023-09-30 13F ONE GAS Equities 68235P108 24,684 -529 -2.10 1,685 -12.96 0.0082
2023-08-14 2023-06-30 13F ONE GAS Stock 68235P108 25,213 23,342 1,247.57 1,937 -66.74 0.0075
2023-05-11 2023-03-31 13F ONE GAS Equities 68235P108 1,871 1,871 5,821 0.0137
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.