BENDER MARK A. (See Remarks) exercised options at ONE GAS, INC.

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

M · 2 exercises

BENDER MARK A.

Filed: 2/20/2025ACC: 0000950170-25-024169

InsiderBENDER MARK A.CIK 1657393

→

IssuerONE GAS, INC.CIK 1587732

Officer· See Remarks

Since Feb 2026

+2.21K

Net shares

Net buyer

$65.6K

Total sold

Open market trades

0B · 0S

Total transactions

7.35K acquired · 5.14K disposed

Non-Derivative Transactions4

Common stock, par value $0.01

Direct

M · Option Exercise

+1.88K

Price / share

$71.53

Trade value

$134.34K

% of position

7.5%

2/18/2025

25.10K→26.98K

Common stock, par value $0.01

Direct

F · Tax Withholding

−646.06

Price / share

$71.53

Trade value

$46.21K

% of position

2.4%

2/18/2025

26.98K→26.34K

Common stock, par value $0.01

Direct

M · Option Exercise

+939.60

Price / share

$71.53

Trade value

$67.21K

% of position

3.6%

2/18/2025

26.34K→27.28K

Common stock, par value $0.01

Direct

F · Tax Withholding

−271.15

Price / share

$71.53

Trade value

$19.40K

% of position

1.0%

2/18/2025

27.28K→27K

Total

Net shares

+1.90K

Net value

$135.94K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common stock, par value $0.01 Direct	2/18/2025	M · Option Exercise	+1.88K	$71.53	$134.34K	7.5%	25.10K	26.98K
Common stock, par value $0.01 Direct	2/18/2025	F · Tax Withholding	−646.06	$71.53	$46.21K	2.4%	26.98K	26.34K
Common stock, par value $0.01 Direct	2/18/2025	M · Option Exercise	+939.60	$71.53	$67.21K	3.6%	26.34K	27.28K
Common stock, par value $0.01 Direct	2/18/2025	F · Tax Withholding	−271.15	$71.53	$19.40K	1.0%	27.28K	27K
Total			+1.90K		$135.94K

Derivative Transactions4

Performance Units 2022

Direct

M · Option Exercise

Converts to

Common stock, par value $0.01

3.38K shares

−3.38K

Strike price

Held after

0.00

Exercisable

—

2/18/2025

Restricted Units 2022

Direct

M · Option Exercise

Converts to

Common stock, par value $0.01

845.00 shares

−845.00

Strike price

Held after

0.00

Exercisable

—

2/18/2025

Performance Units 2025

Direct

A · Award

Converts to

Common stock, par value $0.01

2.72K shares

+2.72K

Strike price

Held after

2.72K

Exercisable

—

2/18/2025

Restricted Units 2025

Direct

A · Award

Converts to

Common stock, par value $0.01

1.81K shares

+1.81K

Strike price

Held after

1.81K

Exercisable

—

2/18/2025

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Performance Units 2022 Direct	Common stock, par value $0.013.38K shares	2/18/2025	M · Option Exercise	−3.38K	—	0.00
Restricted Units 2022 Direct	Common stock, par value $0.01845.00 shares	2/18/2025	M · Option Exercise	−845.00	—	0.00
Performance Units 2025 Direct	Common stock, par value $0.012.72K shares	2/18/2025	A · Award	+2.72K	—	2.72K
Restricted Units 2025 Direct	Common stock, par value $0.011.81K shares	2/18/2025	A · Award	+1.81K	—	1.81K