ONE Gas, Inc.

Regulation FD Disclosure

Regulation FD Disclosure

Regulation FD Disclosure

Entry into a Material Definitive Agreement

Prospectus Supplement for Primary Offering

Free Writing Prospectus

Prospectus Supplement for Primary Offering

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

General form for quarterly reports under Section 13 or 15(d)

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Regulation FD Disclosure

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Submission of Matters to a Vote of Security Holders

Regulation FD Disclosure

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Regulation FD Disclosure

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Additional Information for Proxy Statement/ Votes

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Regulation FD Disclosure

Annual Report Scanned (Paper)

Definitive Proxy Statement

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Regulation FD Disclosure

Entry into a Material Definitive Agreement

Prospectus Supplement for Primary Offering

Automatic Shelf Registration

Automatic Shelf Registration

Other Events

Annual report pursuant to Section 13 or 15(d)

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Results of Operations and Financial Condition

Regulation FD Disclosure

Regulation FD Disclosure

Registration of Securities on Exchange

Certification of approval for listing and registration on a national securities exchange

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

Annual Report Scanned (Paper)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Free Writing Prospectus

Prospectus Supplement for Primary Offering

General form for quarterly reports under Section 13 or 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

Annual Report Scanned (Paper)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Free Writing Prospectus

General form for quarterly reports under Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

General form for quarterly reports under Section 13 or 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Additional Information for Proxy Statement/ Votes

General form for quarterly reports under Section 13 or 15(d)

Annual Report Scanned (Paper)

Definitive Proxy Statement

Prospectus Supplement for Primary Offering

Annual report pursuant to Section 13 or 15(d)

Correspondence with the SEC

Correspondence with the SEC

General form for quarterly reports under Section 13 or 15(d)

Correspondence with the SEC

Registration Statement Under the Securities Act of 1933 (amendment)

Letter from the SEC

Correspondence with the SEC

Registration Statement Under the Securities Act of 1933 (amendment)

Letter from the SEC

Registration Statement Under the Securities Act of 1933 (amendment)

Registration Statement Under the Securities Act of 1933 (amendment)

Correspondence with the SEC

Letter from the SEC

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Preliminary Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

STAVROPOULOS NICKOLAS

STAVROPOULOS NICKOLAS

McCormick Joseph L

MOORE PATTYE L

GIBSON JOHN WILLIAM

Hutchinson Michael G

Hersman Deborah

MOORE PATTYE L

Meshri Sanjay D.

Siegel Yves C

Hart Tracy E

RODRIGUEZ EDUARDO A

RODRIGUEZ EDUARDO A

Brumfield Brian F.