MCANNALLY ROBERT S. (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

MCANNALLY ROBERT S.

Filed: 2/19/2026ACC: 0001193125-26-059412

InsiderMCANNALLY ROBERT S.CIK 1636734

→

IssuerONE GAS, INC.CIK 1587732

DirectorOfficer· See Remarks

Since Feb 2026

+23.27K

Net shares

Net buyer

$960.5K

Total sold

Open market trades

0B · 0S

Total transactions

62.56K acquired · 39.28K disposed

Non-Derivative Transactions4

Common stock, par value $0.01

Direct

M · Option Exercise

+6.28K

Price / share

$86.04

Trade value

$540.23K

% of position

11.2%

2/14/2026

56K→62.28K

Common stock, par value $0.01

Direct

F · Tax Withholding

−2.75K

Price / share

$86.04

Trade value

$236.89K

% of position

4.4%

2/14/2026

62.28K→59.53K

Common stock, par value $0.01

Direct

M · Option Exercise

+19.09K

Price / share

$86.04

Trade value

$1.64M

% of position

42.1%

2/16/2026

45.33K→64.41K

Common stock, par value $0.01

Direct

F · Tax Withholding

−8.41K

Price / share

$86.04

Trade value

$723.62K

% of position

13.1%

2/16/2026

64.41K→56K

Total

Net shares

+14.20K

Net value

$1.22M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common stock, par value $0.01 Direct	2/14/2026	M · Option Exercise	+6.28K	$86.04	$540.23K	11.2%	56K	62.28K
Common stock, par value $0.01 Direct	2/14/2026	F · Tax Withholding	−2.75K	$86.04	$236.89K	4.4%	62.28K	59.53K
Common stock, par value $0.01 Direct	2/16/2026	M · Option Exercise	+19.09K	$86.04	$1.64M	42.1%	45.33K	64.41K
Common stock, par value $0.01 Direct	2/16/2026	F · Tax Withholding	−8.41K	$86.04	$723.62K	13.1%	64.41K	56K
Total			+14.20K		$1.22M

Derivative Transactions4

Restricted Units 2023

Direct

M · Option Exercise

Converts to

Common stock, par value $0.01

5.62K shares

−5.62K

Strike price

Held after

0.00

Exercisable

—

2/14/2026

Performance Units 2023

Direct

M · Option Exercise

Converts to

Common stock, par value $0.01

22.50K shares

−22.50K

Strike price

Held after

0.00

Exercisable

—

2/16/2026

Performance Units 2026

Direct

A · Award

Converts to

Common stock, par value $0.01

26.03K shares

+26.03K

Strike price

Held after

26.03K

Exercisable

—

2/16/2026

Restricted Units 2026

Direct

A · Award

Converts to

Common stock, par value $0.01

11.16K shares

+11.16K

Strike price

Held after

11.16K

Exercisable

—

2/16/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Units 2023 Direct	Common stock, par value $0.015.62K shares	2/14/2026	M · Option Exercise	−5.62K	—	0.00
Performance Units 2023 Direct	Common stock, par value $0.0122.50K shares	2/16/2026	M · Option Exercise	−22.50K	—	0.00
Performance Units 2026 Direct	Common stock, par value $0.0126.03K shares	2/16/2026	A · Award	+26.03K	—	26.03K
Restricted Units 2026 Direct	Common stock, par value $0.0111.16K shares	2/16/2026	A · Award	+11.16K	—	11.16K