ONE Gas, Inc. — Director's Dealing 2019

May 24, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ONE Gas, Inc. (OGS)
CIK: 0001587732
Period of Report: 2019-05-23

Reporting Person: Acosta Arcilia (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-05-23	Common stock, par value $0.01	A	1103	$88.355	Acquired	3380	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-05-23	Phantom Stock	$	A	1103	Disposed		Common stock, par value $0.01 (1103)	Direct

Footnotes

F1: Annual cash retainer elected to be received in shares and annual stock retainer shares are issued under the Issuer's Equity Compensation Plan. Reporting person elected 50 percent of her annual cash retainer to be received in shares of ONE Gas common stock.

F2: Shares of phantom stock are convertible into ONE Gas' common stock on a 1-for-1 ratio.

F3: Annual cash and/or stock retainer elected to be deferred to phantom stock under ONE Gas' Deferred Compensation Plan for Non-Employee Directors.

F4: Phantom stock is accrued under ONE Gas' Deferred Compensation Plan for Non-Employee Directors (the "Plan") and is settled in shares of ONE Gas common stock at the distribution date described in the Plan.