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person · Reporting owner

Sighinolfi Christopher P.

Disclosed activity across 1 company

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65684
SEC CIK
0002003976

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
ONE Gas, Inc.OGS · Entity 3906See RemarksFebruary 14, 2026February 19, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

ONE Gas, Inc.

Report date February 14, 2026 · Filed February 19, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common stock, par value $0.01SEC Table I · non-derivativeDirect4,186.332 Reported balance After 2026-02-16 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2026-02-16 · Exercise / conversion · Acquired 1,361.82 · Balance 4,186.332

F1: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

Common stock, par value $0.01SEC Table I · non-derivativeDirect4,124.805 Reported balance After 2026-02-16 transaction · row 2 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 2 · 2026-02-16 · Tax withholding · Disposed 61.527 · Balance 4,124.805

F1: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

Common stock, par value $0.01SEC Table I · non-derivativeDirect4,722.093 Reported balance After 2026-02-14 transaction · row 3 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 3 · 2026-02-14 · Exercise / conversion · Acquired 597.288 · Balance 4,722.093

F3: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

Common stock, par value $0.01SEC Table I · non-derivativeDirect4,518.114 Reported balance After 2026-02-14 transaction · row 4 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 4 · 2026-02-14 · Tax withholding · Disposed 203.979 · Balance 4,518.114

F3: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

Performance Units 2023SEC Table II · derivative / convertible securityDirect0 Reported balance After 2026-02-16 transaction · row 6 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 6 · 2026-02-16 · Exercise / conversion · Disposed 1,605 · Balance 0

F1: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

Restricted Units 2023SEC Table II · derivative / convertible securityDirect0 Reported balance After 2026-02-14 transaction · row 7 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 7 · 2026-02-14 · Exercise / conversion · Disposed 535 · Balance 0

F3: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

Performance Units 2026SEC Table II · derivative / convertible securityDirect5,579 Reported balance After 2026-02-16 transaction · row 8 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 8 · 2026-02-16 · Grant · Acquired 5,579 · Balance 5,579

F4: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 17, 2029, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2026, through December 31, 2029, in accordance with the terms of the Performance Unit Award Agreement.

Restricted Units 2026SEC Table II · derivative / convertible securityDirect3,719 Reported balance After 2026-02-16 transaction · row 9 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 9 · 2026-02-16 · Grant · Acquired 3,719 · Balance 3,719

F5: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 17, 2029, in accordance with the terms of the Restricted Unit Award Agreement.

Common stock, par value $0.01SEC Table I · non-derivativeIndirectby 401(k) Plan929.793 Reported balance Holding disclosure · report date 2026-02-14 · row 5 Holding and transaction disclosures are not merged.
1 source row

Row 5 · Balance 929.793

Filing footnotes · ownership attribution and instrument terms

F1: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F3: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

F4: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 17, 2029, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2026, through December 31, 2029, in accordance with the terms of the Performance Unit Award Agreement.

F5: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 17, 2029, in accordance with the terms of the Restricted Unit Award Agreement.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
February 16, 2026 Filed Feb 19, 2026 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 GrantRestricted Units 2026 · Derivative 3,719 $86.04 $319,982.76
Disclosure

SEC source: 0001193125-26-059428 · ownership.xml · derivative · entry 9

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,719

Underlying: Common stock, par value $0.01 · 3,719 shares

Expires not disclosed

F5 · derivative.exercise_price: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 17, 2029, in accordance with the terms of the Restricted Unit Award Agreement.

F5 · price: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 17, 2029, in accordance with the terms of the Restricted Unit Award Agreement.

F5 · derivative.exercise_date: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 17, 2029, in accordance with the terms of the Restricted Unit Award Agreement.

F5 · derivative.expiration_date: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 17, 2029, in accordance with the terms of the Restricted Unit Award Agreement.

Read SEC document
February 16, 2026 Filed Feb 19, 2026 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 GrantPerformance Units 2026 · Derivative 5,579 $86.04 $480,017.16
Disclosure

SEC source: 0001193125-26-059428 · ownership.xml · derivative · entry 8

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,579

Underlying: Common stock, par value $0.01 · 5,579 shares

Expires not disclosed

F4 · derivative.exercise_price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 17, 2029, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2026, through December 31, 2029, in accordance with the terms of the Performance Unit Award Agreement.

F4 · price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 17, 2029, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2026, through December 31, 2029, in accordance with the terms of the Performance Unit Award Agreement.

F4 · derivative.exercise_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 17, 2029, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2026, through December 31, 2029, in accordance with the terms of the Performance Unit Award Agreement.

F4 · derivative.expiration_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 17, 2029, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2026, through December 31, 2029, in accordance with the terms of the Performance Unit Award Agreement.

Read SEC document
February 16, 2026 Filed Feb 19, 2026 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionPerformance Units 2023 · Derivative 1,605 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-059428 · ownership.xml · derivative · entry 6

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common stock, par value $0.01 · 1,605 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2 · derivative.exercise_price: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2 · price: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · derivative.exercise_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2 · derivative.exercise_date: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · derivative.expiration_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2 · derivative.expiration_date: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

Read SEC document
February 16, 2026 Filed Feb 19, 2026 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Tax withholdingCommon stock, par value $0.01 61.527 $86.04 $5,293.78
Disclosure

SEC source: 0001193125-26-059428 · ownership.xml · nonDerivative · entry 2

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,124.805

F1 · shares: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2 · shares: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2 · price: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

Read SEC document
February 16, 2026 Filed Feb 19, 2026 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionCommon stock, par value $0.01 1,361.82 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-059428 · ownership.xml · nonDerivative · entry 1

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,186.332

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2 · shares: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2 · price: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · balance_after: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement. The reporting person's receipt of 1,361.820 shares of common stock was deferred resulting in the reporting person's receipt of 1,361.820 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election.

F2 · balance_after: (Continued from footnote 1) The reporting person is therefore reporting the disposition of 1,361.820 shares of common stock in exchange for an equal number of deferred stock units. The reporting person had 61.527 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

Read SEC document
February 14, 2026 Filed Feb 19, 2026 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionRestricted Units 2023 · Derivative 535 $86.04 $46,031.40
Disclosure

SEC source: 0001193125-26-059428 · ownership.xml · derivative · entry 7

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common stock, par value $0.01 · 535 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

F3 · price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

F3 · derivative.exercise_date: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

F3 · derivative.expiration_date: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

Read SEC document
February 14, 2026 Filed Feb 19, 2026 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Tax withholdingCommon stock, par value $0.01 203.979 $86.04 $17,550.35
Disclosure

SEC source: 0001193125-26-059428 · ownership.xml · nonDerivative · entry 4

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,518.114

F3 · shares: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

F3 · price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

Read SEC document
February 14, 2026 Filed Feb 19, 2026 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionCommon stock, par value $0.01 597.288 $86.04 $51,390.66
Disclosure

SEC source: 0001193125-26-059428 · ownership.xml · nonDerivative · entry 3

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,722.093

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

F3 · price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

Read SEC document
February 18, 2025 Filed Feb 20, 2025 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 GrantRestricted Units 2025 · Derivative 3,775 $71.53 $270,025.75
Disclosure

SEC source: 0000950170-25-024170 · ownership.xml · derivative · entry 8

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,775

Underlying: Common stock, par value $0.01 · 3,775 shares

Expires not disclosed

F5 · derivative.exercise_price: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 19, 2028, in accordance with the terms of the Restricted Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested restricted unit and dividend equivalent.

F5 · price: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 19, 2028, in accordance with the terms of the Restricted Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested restricted unit and dividend equivalent.

F5 · derivative.exercise_date: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 19, 2028, in accordance with the terms of the Restricted Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested restricted unit and dividend equivalent.

F5 · derivative.expiration_date: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 19, 2028, in accordance with the terms of the Restricted Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested restricted unit and dividend equivalent.

Read SEC document
February 18, 2025 Filed Feb 20, 2025 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 GrantPerformance Units 2025 · Derivative 5,662 $71.53 $405,002.86
Disclosure

SEC source: 0000950170-25-024170 · ownership.xml · derivative · entry 7

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,662

Underlying: Common stock, par value $0.01 · 5,662 shares

Expires not disclosed

F4 · derivative.exercise_price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 19, 2028, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2025, through December 31, 2027, in accordance with the terms of the Performance Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested performance unit and dividend equivalent.

F4 · price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 19, 2028, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2025, through December 31, 2027, in accordance with the terms of the Performance Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested performance unit and dividend equivalent.

F4 · derivative.exercise_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 19, 2028, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2025, through December 31, 2027, in accordance with the terms of the Performance Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested performance unit and dividend equivalent.

F4 · derivative.expiration_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 19, 2028, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2025, through December 31, 2027, in accordance with the terms of the Performance Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested performance unit and dividend equivalent.

Read SEC document
February 18, 2025 Filed Feb 20, 2025 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionRestricted Units 2022 · Derivative 455 $71.53 $32,546.15
Disclosure

SEC source: 0000950170-25-024170 · ownership.xml · derivative · entry 6

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common stock, par value $0.01 · 455 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 15, 2025. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents were payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

F3 · price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 15, 2025. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents were payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

F3 · derivative.exercise_date: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 15, 2025. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents were payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

F3 · derivative.expiration_date: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 15, 2025. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents were payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

Read SEC document
February 18, 2025 Filed Feb 20, 2025 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionPerformance Units 2022 · Derivative 1,364 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-024170 · ownership.xml · derivative · entry 5

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common stock, par value $0.01 · 1,364 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 15, 2025, in an amount equal to 50% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group and was certified by the Executive Compensation Committee of the Board of Directors on February 17, 2025. The reporting person's receipt of 758.352 shares of common stock was deferred under the ECP resulting in the reporting person's receipt of 758.352 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election under the ECP. The reporting person is therefore reporting the disposition of 758.352 shares of common stock in exchange for an equal number of deferred stock units.

F2 · derivative.exercise_price: (Continued from footnote 1) The reporting person had 59.149 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 15, 2025, in an amount equal to 50% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group and was certified by the Executive Compensation Committee of the Board of Directors on February 17, 2025. The reporting person's receipt of 758.352 shares of common stock was deferred under the ECP resulting in the reporting person's receipt of 758.352 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election under the ECP. The reporting person is therefore reporting the disposition of 758.352 shares of common stock in exchange for an equal number of deferred stock units.

F2 · price: (Continued from footnote 1) The reporting person had 59.149 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · derivative.exercise_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 15, 2025, in an amount equal to 50% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group and was certified by the Executive Compensation Committee of the Board of Directors on February 17, 2025. The reporting person's receipt of 758.352 shares of common stock was deferred under the ECP resulting in the reporting person's receipt of 758.352 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election under the ECP. The reporting person is therefore reporting the disposition of 758.352 shares of common stock in exchange for an equal number of deferred stock units.

F2 · derivative.exercise_date: (Continued from footnote 1) The reporting person had 59.149 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · derivative.expiration_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 15, 2025, in an amount equal to 50% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group and was certified by the Executive Compensation Committee of the Board of Directors on February 17, 2025. The reporting person's receipt of 758.352 shares of common stock was deferred under the ECP resulting in the reporting person's receipt of 758.352 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election under the ECP. The reporting person is therefore reporting the disposition of 758.352 shares of common stock in exchange for an equal number of deferred stock units.

F2 · derivative.expiration_date: (Continued from footnote 1) The reporting person had 59.149 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

Read SEC document
February 18, 2025 Filed Feb 20, 2025 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Tax withholdingCommon stock, par value $0.01 174.043 $71.53 $12,449.30
Disclosure

SEC source: 0000950170-25-024170 · ownership.xml · nonDerivative · entry 4

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,461.34

F3 · shares: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 15, 2025. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents were payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

F3 · price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 15, 2025. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents were payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

Read SEC document
February 18, 2025 Filed Feb 20, 2025 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionCommon stock, par value $0.01 505.939 $71.53 $36,189.82
Disclosure

SEC source: 0000950170-25-024170 · ownership.xml · nonDerivative · entry 3

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,635.383

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 15, 2025. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents were payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

F3 · price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 15, 2025. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents were payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

Read SEC document
February 18, 2025 Filed Feb 20, 2025 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Tax withholdingCommon stock, par value $0.01 59.149 $71.53 $4,230.93
Disclosure

SEC source: 0000950170-25-024170 · ownership.xml · nonDerivative · entry 2

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,129.444

F1 · shares: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 15, 2025, in an amount equal to 50% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group and was certified by the Executive Compensation Committee of the Board of Directors on February 17, 2025. The reporting person's receipt of 758.352 shares of common stock was deferred under the ECP resulting in the reporting person's receipt of 758.352 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election under the ECP. The reporting person is therefore reporting the disposition of 758.352 shares of common stock in exchange for an equal number of deferred stock units.

F2 · shares: (Continued from footnote 1) The reporting person had 59.149 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 15, 2025, in an amount equal to 50% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group and was certified by the Executive Compensation Committee of the Board of Directors on February 17, 2025. The reporting person's receipt of 758.352 shares of common stock was deferred under the ECP resulting in the reporting person's receipt of 758.352 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election under the ECP. The reporting person is therefore reporting the disposition of 758.352 shares of common stock in exchange for an equal number of deferred stock units.

F2 · price: (Continued from footnote 1) The reporting person had 59.149 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

Read SEC document
February 18, 2025 Filed Feb 20, 2025 16:15 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionCommon stock, par value $0.01 758.352 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-024170 · ownership.xml · nonDerivative · entry 1

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,188.593

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 15, 2025, in an amount equal to 50% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group and was certified by the Executive Compensation Committee of the Board of Directors on February 17, 2025. The reporting person's receipt of 758.352 shares of common stock was deferred under the ECP resulting in the reporting person's receipt of 758.352 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election under the ECP. The reporting person is therefore reporting the disposition of 758.352 shares of common stock in exchange for an equal number of deferred stock units.

F2 · shares: (Continued from footnote 1) The reporting person had 59.149 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 15, 2025, in an amount equal to 50% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group and was certified by the Executive Compensation Committee of the Board of Directors on February 17, 2025. The reporting person's receipt of 758.352 shares of common stock was deferred under the ECP resulting in the reporting person's receipt of 758.352 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election under the ECP. The reporting person is therefore reporting the disposition of 758.352 shares of common stock in exchange for an equal number of deferred stock units.

F2 · price: (Continued from footnote 1) The reporting person had 59.149 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

F1 · balance_after: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018) (the "ECP"). The award, including dividend equivalents, vested on February 15, 2025, in an amount equal to 50% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group and was certified by the Executive Compensation Committee of the Board of Directors on February 17, 2025. The reporting person's receipt of 758.352 shares of common stock was deferred under the ECP resulting in the reporting person's receipt of 758.352 deferred stock units. The deferred stock units become payable in shares of common stock after the reporting person's termination of service, pursuant to the reporting person's distribution election under the ECP. The reporting person is therefore reporting the disposition of 758.352 shares of common stock in exchange for an equal number of deferred stock units.

F2 · balance_after: (Continued from footnote 1) The reporting person had 59.149 shares withheld and cancelled in respect of taxes in connection with the vesting of the performance units.

Read SEC document
February 18, 2025 Filed Apr 7, 2025 16:15 UTC Amendment ONE Gas, Inc. OGS · Entity 3906 Tax withholdingCommon stock, par value $0.01 174.043 $71.53 $12,449.30
Disclosure

SEC source: 0000950170-25-051597 · ownership.xml · nonDerivative · entry 3

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,502.667

F2 · balance_after: After recalculation of 17.822 shares withheld and cancelled for taxes as reported on line 1 of Column 4 of Table I above, the share difference of 41.327 has been corrected in the calculations shown in Column 5 of Table I on lines 1, 2 and 3. The new totals in Column 5 above amends the totals reported on lines 2, 3 and 4 of Column 5 of Table 1 as originally filed in the Form 4 on February 20, 2025.

Read SEC document
February 18, 2025 Filed Apr 7, 2025 16:15 UTC Amendment ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionCommon stock, par value $0.01 505.939 $71.53 $36,189.82
Disclosure

SEC source: 0000950170-25-051597 · ownership.xml · nonDerivative · entry 2

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,676.71

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · balance_after: After recalculation of 17.822 shares withheld and cancelled for taxes as reported on line 1 of Column 4 of Table I above, the share difference of 41.327 has been corrected in the calculations shown in Column 5 of Table I on lines 1, 2 and 3. The new totals in Column 5 above amends the totals reported on lines 2, 3 and 4 of Column 5 of Table 1 as originally filed in the Form 4 on February 20, 2025.

Read SEC document
February 18, 2025 Filed Apr 7, 2025 16:15 UTC Amendment ONE Gas, Inc. OGS · Entity 3906 Tax withholdingCommon stock, par value $0.01 17.822 $71.53 $1,274.81
Disclosure

SEC source: 0000950170-25-051597 · ownership.xml · nonDerivative · entry 1

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,170.771

F1 · shares: The Form 4, as originally filed on February 20, 2025, incorrectly reported in line 2 of Column 4 of Table I, 59.149 shares were withheld and cancelled for taxes in connection with vesting of 758.352 performance unit shares deferred by the reporting person. Later, the issuer revised the actual number of shares required based on updated withholding calculations. Thus, as reported in this amendment, the reporting person only surrendered 17.822 shares of the issuer's Common Stock to satisfy those tax withholding obligations, and this amendment corrects that amount.

F2 · balance_after: After recalculation of 17.822 shares withheld and cancelled for taxes as reported on line 1 of Column 4 of Table I above, the share difference of 41.327 has been corrected in the calculations shown in Column 5 of Table I on lines 1, 2 and 3. The new totals in Column 5 above amends the totals reported on lines 2, 3 and 4 of Column 5 of Table 1 as originally filed in the Form 4 on February 20, 2025.

Read SEC document
February 19, 2024 Filed Feb 21, 2024 16:52 UTC ONE Gas, Inc. OGS · Entity 3906 GrantRestricted Units 2024 · Derivative 1,976 $60.74 $120,022.24
Disclosure

SEC source: 0000950170-24-018031 · ownership.xml · derivative · entry 6

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,976

Underlying: Common stock, par value $0.01 · 1,976 shares

Expires not disclosed

F4 · derivative.exercise_price: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 13, 2027, in accordance with the terms of the Restricted Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested restricted unit and dividend equivalent.

F4 · price: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 13, 2027, in accordance with the terms of the Restricted Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested restricted unit and dividend equivalent.

F4 · derivative.exercise_date: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 13, 2027, in accordance with the terms of the Restricted Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested restricted unit and dividend equivalent.

F4 · derivative.expiration_date: Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 13, 2027, in accordance with the terms of the Restricted Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested restricted unit and dividend equivalent.

Read SEC document
February 19, 2024 Filed Feb 21, 2024 16:52 UTC ONE Gas, Inc. OGS · Entity 3906 GrantPerformance Units 2024 · Derivative 7,903 $60.74 $480,028.22
Disclosure

SEC source: 0000950170-24-018031 · ownership.xml · derivative · entry 5

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,903

Underlying: Common stock, par value $0.01 · 7,903 shares

Expires not disclosed

F3 · derivative.exercise_price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 13, 2027, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2024, through December 31, 2026, in accordance with the terms of the Performance Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested performance unit and dividend equivalent.

F3 · price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 13, 2027, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2024, through December 31, 2026, in accordance with the terms of the Performance Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested performance unit and dividend equivalent.

F3 · derivative.exercise_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 13, 2027, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2024, through December 31, 2026, in accordance with the terms of the Performance Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested performance unit and dividend equivalent.

F3 · derivative.expiration_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 13, 2027, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2024, through December 31, 2026, in accordance with the terms of the Performance Unit Award Agreement. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out at the time the underlying units are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested performance unit and dividend equivalent.

Read SEC document
February 19, 2024 Filed Feb 21, 2024 16:52 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionRestricted Units 2021 · Derivative 481 $60.74 $29,215.94
Disclosure

SEC source: 0000950170-24-018031 · ownership.xml · derivative · entry 4

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common stock, par value $0.01 · 481 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 17, 2024. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents was payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

F2 · price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 17, 2024. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents was payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

F2 · derivative.exercise_date: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 17, 2024. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents was payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

F2 · derivative.expiration_date: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 17, 2024. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents was payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

Read SEC document
February 19, 2024 Filed Feb 21, 2024 16:52 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionPerformance Units 2021 · Derivative 1,442 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-018031 · ownership.xml · derivative · entry 3

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common stock, par value $0.01 · 1,442 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award, including dividend equivalents, vested on February 17, 2024, at less than the 25th percentile for the Issuer's total shareholder return compared to the total shareholder return of a selected peer group, resulting in no shares being issued to the reporting person upon certification by the Executive Compensation Committee of the Board of Directors of the Company on February 19, 2024.

F1 · price: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award, including dividend equivalents, vested on February 17, 2024, at less than the 25th percentile for the Issuer's total shareholder return compared to the total shareholder return of a selected peer group, resulting in no shares being issued to the reporting person upon certification by the Executive Compensation Committee of the Board of Directors of the Company on February 19, 2024.

F1 · derivative.exercise_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award, including dividend equivalents, vested on February 17, 2024, at less than the 25th percentile for the Issuer's total shareholder return compared to the total shareholder return of a selected peer group, resulting in no shares being issued to the reporting person upon certification by the Executive Compensation Committee of the Board of Directors of the Company on February 19, 2024.

F1 · derivative.expiration_date: Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award, including dividend equivalents, vested on February 17, 2024, at less than the 25th percentile for the Issuer's total shareholder return compared to the total shareholder return of a selected peer group, resulting in no shares being issued to the reporting person upon certification by the Executive Compensation Committee of the Board of Directors of the Company on February 19, 2024.

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February 19, 2024 Filed Feb 21, 2024 16:52 UTC ONE Gas, Inc. OGS · Entity 3906 Tax withholdingCommon stock, par value $0.01 179 $60.74 $10,872.46
Disclosure

SEC source: 0000950170-24-018031 · ownership.xml · nonDerivative · entry 2

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 993

F2 · shares: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 17, 2024. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents was payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

F2 · price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 17, 2024. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents was payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

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February 19, 2024 Filed Feb 21, 2024 16:52 UTC ONE Gas, Inc. OGS · Entity 3906 Exercise / conversionCommon stock, par value $0.01 518 $60.74 $31,463.32
Disclosure

SEC source: 0000950170-24-018031 · ownership.xml · nonDerivative · entry 1

Sighinolfi Christopher P. · CIK 0002003976 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,172

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 17, 2024. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents was payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

F2 · price: Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). The award vested on February 17, 2024. During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The award and credited dividend equivalents was payable one share of the Issuer's common stock for each vested restricted unit, including additional restricted units resulting from the dividend equivalents.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.