MCCORMICK JOSEPH L (See Remarks) exercised options at ONE GAS, INC.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise

MCCORMICK JOSEPH L

Filed: 2/21/2024ACC: 0000950170-24-017901

InsiderMCCORMICK JOSEPH LCIK 1595607

→

IssuerONE GAS, INC.CIK 1587732

Officer· See Remarks

Since Feb 2026

+4.13K

Net shares

Net buyer

$41.1K

Total sold

Open market trades

0B · 0S

Total transactions

11K acquired · 6.87K disposed

Non-Derivative Transactions2

Common stock, par value $0.01

Direct

M · Option Exercise

+1.37K

Price / share

$60.74

Trade value

$83.03K

% of position

2.0%

2/19/2024

68.57K→69.94K

Common stock, par value $0.01

Direct

F · Tax Withholding

−676.00

Price / share

$60.74

Trade value

$41.06K

% of position

1.0%

2/19/2024

69.94K→69.27K

Total

Net shares

+691.00

Net value

$41.97K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common stock, par value $0.01 Direct	2/19/2024	M · Option Exercise	+1.37K	$60.74	$83.03K	2.0%	68.57K	69.94K
Common stock, par value $0.01 Direct	2/19/2024	F · Tax Withholding	−676.00	$60.74	$41.06K	1.0%	69.94K	69.27K
Total			+691.00		$41.97K

Derivative Transactions4

Performance Units 2021

Direct

M · Option Exercise

Converts to

Common stock, par value $0.01

4.95K shares

−4.95K

Strike price

Held after

0.00

Exercisable

—

2/19/2024

Restricted Units 2021

Direct

M · Option Exercise

Converts to

Common stock, par value $0.01

1.24K shares

−1.24K

Strike price

Held after

0.00

Exercisable

—

2/19/2024

Performance Units 2024

Direct

A · Award

Converts to

Common stock, par value $0.01

7.71K shares

+7.71K

Strike price

Held after

7.71K

Exercisable

—

2/19/2024

Restricted Units 2024

Direct

A · Award

Converts to

Common stock, par value $0.01

1.93K shares

+1.93K

Strike price

Held after

1.93K

Exercisable

—

2/19/2024

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Performance Units 2021 Direct	Common stock, par value $0.014.95K shares	2/19/2024	M · Option Exercise	−4.95K	—	0.00
Restricted Units 2021 Direct	Common stock, par value $0.011.24K shares	2/19/2024	M · Option Exercise	−1.24K	—	0.00
Performance Units 2024 Direct	Common stock, par value $0.017.71K shares	2/19/2024	A · Award	+7.71K	—	7.71K
Restricted Units 2024 Direct	Common stock, par value $0.011.93K shares	2/19/2024	A · Award	+1.93K	—	1.93K

Non-Derivative Holdings (Post-Transaction)1

Common stock, par value $0.01

Indirect

Shares owned3.43K

Total

3.43K indirect3.43K

Security Title	Shares Owned	Ownership Type
Common stock, par value $0.01	3.43K	Indirect
Total	3.43K	3.43K indirect

Derivative Holdings (Post-Transaction)0

No derivative holdings reported