Atmos Energy (ATO) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
Download these transactions as CSV No account, no sign-up. The data is public: it comes from SEC Form 4 filings.
Atmos Energy Corporation (ATO) insider buying and selling: 1 purchase, 1 sale
40 Form 4 Table I transactions filed with the SEC by Atmos Energy Corporation insiders between 2025-10-02 and 2026-10-05 (15-month history): 1 open-market purchase and 1 sale, plus 38 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $77k by Donohue Sean on 2025-12-03.
Atmos Energy insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Atmos Energy insiders filed 1 purchase worth $50k and 1 sale worth $77k on the open market. The net balance is on the sell side: $27k more sold than bought.
The biggest buyer was Ware William James (Director): $50k in 1 purchase, the only buyer. The biggest seller was Donohue Sean (Director): $77k in 1 sale, the only seller.
The largest trade of the period was a sale of $77k on Dec 3, 2025, by Donohue Sean (Director). Form 4 on sec.gov (0000731802-25-000058).
The only sale does not carry the 10b5-1 plan flag on the Form 4 (sales scheduled months ahead).
The last three months show 1 purchase and 0 sales, against 0 and 0 in the three before. The latest purchase is from Aug 11, 2026; the latest sale from Dec 3, 2025.
Against its sector (Utilities, 31 companies with an insider page on this site), over the same dates the median is 5 sales and 0 purchases on the open market. Atmos Energy has more sales than 5 of the other 30, ranks 25 of 31 by net dollars sold, and 11 of the 31 have at least one purchase, Atmos Energy included.
The 20 most important trades
The only open-market purchase first, then the rest, each type from largest to smallest. The full history is in the tool above, already searched.
See all 40 ATO trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-08-11 | 2026-08-12 | Ware William James | Director | $50k | P — Open-market purchase | SEC |
| 2025-12-03 | 2025-12-04 | Donohue Sean | Director | $77k | S — Open-market sale | SEC |
| 2025-11-04 | 2025-11-05 | Akers John K | PRESIDENT & CEO | $5.6M | M — Option exerciseForm 4 footnoteF1 Vesting of award of performance based restricted stock units pursuant to the 1998 Long-Term Incentive Plan of the Company (the "Plan"). | SEC |
| 2026-02-04 | 2026-02-05 | Sampson Richard A | Director | $5.4M | C — Conversion of a derivative2 Form 4 footnotesF1 Includes 0.751 shares resulting from a feature of the Company's Equity Incentive and Deferred Compensation Plan for Non-Employee Directors (the "Plan") authorizing fractional shares to be rounded up to the nearest whole share upon distribution. F2 Includes 0.7743 shares pursuant to Plan authorizing fractional shares to be rounded up to the nearest whole share upon distribution. | SEC |
| 2026-05-02 | 2026-05-04 | Akers John K | PRESIDENT & CEO | $3.2M | M — Option exercise | SEC |
| 2025-11-04 | 2025-11-05 | Akers John K | PRESIDENT & CEO | $2.2M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Shares withheld pursuant to a tax withholding obligation under the Plan. | SEC |
| 2025-11-04 | 2025-11-05 | Forsythe Christopher T | SR VICE PRESIDENT & CFO | $1.3M | M — Option exerciseForm 4 footnoteF1 Vesting of award of performance based restricted stock units pursuant to the 1998 Long-Term Incentive Plan of the Company (the "Plan"). | SEC |
| 2026-05-02 | 2026-05-04 | Akers John K | PRESIDENT & CEO | $1.2M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF1 Shares withheld pursuant to a tax withholding obligation under the 1998 Long-Term Incentive Plan (the "Plan".) | SEC |
| 2025-11-04 | 2025-11-05 | Robbins J Matt | SR VP, HUMAN RESOURCES | $933k | M — Option exerciseForm 4 footnoteF1 Vesting of award of performance based restricted stock units pursuant to the 1998 Long-Term Incentive Plan of the Company (the "Plan"). | SEC |
| 2025-11-04 | 2025-11-05 | Mcdill John S | SR VP, UTILITY OPERATIONS | $933k | M — Option exerciseForm 4 footnoteF1 Vesting of award of performance based restricted stock units pursuant to the 1998 Long-Term Incentive Plan of the Company (the "Plan"). | SEC |
| 2025-11-04 | 2025-11-05 | Hartsfield Karen E | Senior Advisor | $933k | M — Option exerciseForm 4 footnoteF1 Vesting of award of performance based restricted stock units pursuant to the 1998 Long-Term Incentive Plan of the Company (the "Plan"). | SEC |
| 2026-05-02 | 2026-05-04 | Forsythe Christopher T | SR VICE PRESIDENT & CFO | $753k | M — Option exercise | SEC |
| 2026-05-02 | 2026-05-04 | Hartsfield Karen E | Senior Advisor | $534k | M — Option exercise | SEC |
| 2026-05-02 | 2026-05-04 | Mcdill John S | SR VP, UTILITY OPERATIONS | $534k | M — Option exerciseForm 4 footnoteF1 To update end of period holdings as of May 1, 2026, for shares received under an automatic dividend reinvestment feature. | SEC |
| 2026-05-02 | 2026-05-04 | Robbins J Matt | SR VP, HUMAN RESOURCES | $534k | M — Option exercise | SEC |
| 2025-11-04 | 2025-11-05 | Forsythe Christopher T | SR VICE PRESIDENT & CFO | $518k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Shares withheld pursuant to a tax withholding obligation under the Plan. | SEC |
| 2026-01-02 | 2026-01-05 | Bateman Jessica Walker | Sr VP, Gen Counsel, Corp Sec'y | $421k | M — Option exerciseForm 4 footnoteF1 To report the vesting and delivery of the first installment of 2,500 RSUs issued to the reporting person on January 15, 2025. | SEC |
| 2025-11-04 | 2025-11-05 | Robbins J Matt | SR VP, HUMAN RESOURCES | $367k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Shares withheld pursuant to a tax withholding obligation under the Plan. | SEC |
| 2025-11-04 | 2025-11-05 | Mcdill John S | SR VP, UTILITY OPERATIONS | $367k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF2 Shares withheld pursuant to a tax withholding obligation under the Plan. F3 To update end of period holdings as of November 1, 2025, for shares received under an automatic dividend reinvestment feature. | SEC |
| 2025-11-04 | 2025-11-05 | Hartsfield Karen E | Senior Advisor | $367k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Shares withheld pursuant to a tax withholding obligation under the Plan. | SEC |
The period balance: money in, money out
Across the Form 4 filings submitted between Oct 2, 2025 and Oct 5, 2026, Atmos Energy Corporation open-market activity adds up to 1 purchase worth $50k and 1 sale worth $77k. The net balance is $27k on the sell side.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like Atmos Energy Corporation's is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| M | Option exercise | 16 | $16.4M |
| F | Tax withholding (shares surrendered for taxes) | 13 | $6.1M |
| A | Grant or award | 5 | $57k |
| G | Gift | 3 | $325k |
| C | Conversion of a derivative | 1 | $5.4M |
| P | Open-market purchase | 1 | $50k |
| S | Open-market sale | 1 | $77k |
| Total | Everything filed in the period | 40 | $28.4M |
1 of the 40 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 14 distinct people or entities have filed Atmos Energy Corporation transactions: 1 bought on the open market and 1 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Donohue Sean | Director | 1 | — | $77k (1) | 2025-12-04 |
| Ware William James | Director | 1 | $50k (1) | — | 2026-08-12 |
| Robbins J Matt | SR VP, HUMAN RESOURCES | 6 | — | — | 2026-09-17 |
| Garza Rafael G | Director | 5 | — | — | 2026-10-05 |
| Akers John K | PRESIDENT & CEO | 4 | — | — | 2026-05-04 |
| Faulk Michelle | Vice President & Controller | 4 | — | — | 2026-05-04 |
| Forsythe Christopher T | SR VICE PRESIDENT & CFO | 4 | — | — | 2026-05-04 |
| Hartsfield Karen E | Senior Advisor | 4 | — | — | 2026-05-04 |
Shown here are the 8 who moved the most money, out of 14. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
Across the 15 months of history there are only 2 open-market trades in Atmos Energy Corporation, so no calendar is published: 15 rows of zeros would fake a pattern where there is no sample to read. They are listed with their dates in the tables above.
Atmos Energy Corporation (ATO) analysis page →
Other Utilities companies with insider trades
All 500 are listed in the section index →
Which insiders are buying their own company stock →
How to read this data
None of the 1 sale in the table is flagged as scheduled (10b5-1 plan), the kind signed months ahead and executed automatically. Atmos Energy's single open-market purchase (code P) is the rare signal: insiders are already paid in stock, so buying more means putting in their own money. The latest filing is from Oct 5, 2026, and a Form 4 arrives up to two business days after the trade.
14 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.