Karen E. Hartsfield - 02 May 2026 Form 4 Insider Report for ATMOS ENERGY CORP (ATO)

Reporting relationship: Senior Advisor
Issuer ticker: ATO
Reported as of: 02 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 May 2026, 16:54:11 UTC
Prior SEC filing: 04 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/Suzanne Johnson by POA

Key filing fact

Karen E. Hartsfield filed Form 4 for ATMOS ENERGY CORP (ATO) on 04 May 2026.

Key facts

This page summarizes Karen E. Hartsfield's Form 4 filing for ATMOS ENERGY CORP (ATO).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 04 May 2026, 16:54.

Change

Previous filing in this sequence was filed on 04 Feb 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001713954 Primary reporting owner

HARTSFIELD KAREN E

Relationship: Senior Advisor
Address: 5430 LBJ FREEWAY, 1800 III LINCOLN CENTRE, DALLAS
Signature: /s/Suzanne Johnson by POA
Signature date: 04 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ATO transaction

Common Stock

Options Exercise

Transaction value
Shares: +2,815
Change %: +9%
Price: $189.74^*
Shares after: 34,028
Date: 02 May 2026
Ownership: Direct

ATO transaction

Common Stock

Tax liability

Transaction value
Shares: -1,042
Change %: -3.1%
Price: $189.74^*
Shares after: 32,986
Date: 02 May 2026
Ownership: Direct
Footnotes: F1

ATO holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,874
Date: 02 May 2026
Ownership: By Retirement Savings Plan and Trust
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ATO transaction Derivative

Restricted Stock Unit

Options Exercise

Transaction value
Shares: -2,815
Change %: -40%
Price: $0.000000^*
Shares after: 4,195
Date: 02 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,815
Exercise price
Footnotes: F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Shares withheld pursuant to a tax withholding obligation under the 1998 Long-Term Incentive Plan (the "Plan".)

Footnote F2

To update end of period holdings as of May 1, 2026 under the Atmos Energy Corporation Retirement Savings Plan and Trust.

Footnote F3

Each restricted share unit represents a contingent right to receive one share of the Company's common stock.

Footnote F4

The restricted share units vested and were delivered to the reporting person three years from date of grant pursuant to the Plan.