DINAN CURTIS (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

DINAN CURTIS

Filed: 2/21/2024ACC: 0000950170-24-018113

InsiderDINAN CURTISCIK 1278745

→

IssuerONE GAS, INC.CIK 1587732

Officer· See Remarks

Since Feb 2026

+3.91K

Net shares

Net buyer

$61.5K

Total sold

Open market trades

0B · 0S

Total transactions

14.44K acquired · 10.53K disposed

Non-Derivative Transactions4

Common stock, par value $0.01

Direct

M · Option Exercise

+1.52K

Price / share

$60.74

Trade value

$92.26K

% of position

1.1%

2/19/2024

134.27K→135.79K

Common stock, par value $0.01

Direct

F · Tax Withholding

−751.00

Price / share

$60.74

Trade value

$45.62K

% of position

0.6%

2/19/2024

135.79K→135.04K

Common stock, par value $0.01

Direct

M · Option Exercise

+573.00

Price / share

$60.74

Trade value

$34.80K

% of position

0.4%

2/19/2024

135.04K→135.61K

Common stock, par value $0.01

Direct

F · Tax Withholding

−262.00

Price / share

$60.74

Trade value

$15.91K

% of position

0.2%

2/19/2024

135.61K→135.35K

Total

Net shares

+1.08K

Net value

$65.54K

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	+1.52K	$60.74	$92.26K	1.1%	134.27K	135.79K
Common stock, par value $0.01 Direct	2/19/2024	F · Tax Withholding	−751.00	$60.74	$45.62K	0.6%	135.79K	135.04K
Common stock, par value $0.01 Direct	2/19/2024	M · Option Exercise	+573.00	$60.74	$34.80K	0.4%	135.04K	135.61K
Common stock, par value $0.01 Direct	2/19/2024	F · Tax Withholding	−262.00	$60.74	$15.91K	0.2%	135.61K	135.35K
Total			+1.08K		$65.54K

Derivative Transactions6

Performance Units 2021

Direct

M · Option Exercise

Converts to

Common stock, par value $0.01

5.50K shares

−5.50K

Strike price

Held after

0.00

Exercisable

—

2/19/2024

Performance Units 2021 - 2

Direct

M · Option Exercise

Converts to

Common stock, par value $0.01

2.11K shares

−2.11K

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

1.38K shares

−1.38K

Strike price

Held after

0.00

Exercisable

—

2/19/2024

Restricted Units 2021 - 2

Direct

M · Option Exercise

Converts to

Common stock, par value $0.01

527.00 shares

−527.00

Strike price

Held after

0.00

Exercisable

—

2/19/2024

Performance Units 2024

Direct

A · Award

Converts to

Common stock, par value $0.01

9.88K shares

+9.88K

Strike price

Held after

9.88K

Exercisable

—

2/19/2024

Restricted Units 2024

Direct

A · Award

Converts to

Common stock, par value $0.01

2.47K shares

+2.47K

Strike price

Held after

2.47K

Exercisable

—

2/19/2024

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Performance Units 2021 Direct	Common stock, par value $0.015.50K shares	2/19/2024	M · Option Exercise	−5.50K	—	0.00
Performance Units 2021 - 2 Direct	Common stock, par value $0.012.11K shares	2/19/2024	M · Option Exercise	−2.11K	—	0.00
Restricted Units 2021 Direct	Common stock, par value $0.011.38K shares	2/19/2024	M · Option Exercise	−1.38K	—	0.00
Restricted Units 2021 - 2 Direct	Common stock, par value $0.01527.00 shares	2/19/2024	M · Option Exercise	−527.00	—	0.00
Performance Units 2024 Direct	Common stock, par value $0.019.88K shares	2/19/2024	A · Award	+9.88K	—	9.88K
Restricted Units 2024 Direct	Common stock, par value $0.012.47K shares	2/19/2024	A · Award	+2.47K	—	2.47K

Non-Derivative Holdings (Post-Transaction)1

Common stock, par value $0.01

Indirect

Shares owned5.85K

Total

5.85K indirect5.85K

Security Title	Shares Owned	Ownership Type
Common stock, par value $0.01	5.85K	Indirect
Total	5.85K	5.85K indirect

Derivative Holdings (Post-Transaction)0

No derivative holdings reported