Joseph L. McCormick - 16 Feb 2026 Form 4 Insider Report for ONE Gas, Inc. (OGS)

Role
Former Senior Vice President, General Counsel and Assistant Secretary
Signature
/s/ Brian K. Shore, Attorney-in-Fact for Joseph L. McCormick
Issuer symbol
OGS
Transactions as of
16 Feb 2026
Net transactions value
-$231,920
Form type
4
Filing time
19 Feb 2026, 16:15:26 UTC
Previous filing
20 Feb 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
McCormick Joseph L Former Senior Vice President, General Counsel and Assistant Secretary 15 E. 5TH STREET, TULSA /s/ Brian K. Shore, Attorney-in-Fact for Joseph L. McCormick 19 Feb 2026 0001595607

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction OGS Common stock, par value $0.01 Options Exercise $327,279 +3,804 +5.2% $86.04 76,515 16 Feb 2026 Direct F1
transaction OGS Common stock, par value $0.01 Tax liability $138,377 -1,608 -2.1% $86.04 74,907 16 Feb 2026 Direct F1
holding OGS Common stock, par value $0.01 3,697 16 Feb 2026 by 401(k) Plan

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction OGS Performance Units 2023 Options Exercise $420,822 -4,891 -100% $86.04 0 16 Feb 2026 Common stock, par value $0.01 4,891 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award, including dividend equivalents, vested on a prorated basis upon the reporting person's December 9, 2025, retirement pursuant to the terms of the award agreement. The award vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement.

Remarks:

Former Senior Vice President, General Counsel and Assistant Secretary