SEC Form 4
ATI Inc. (ATI) insider trading
In the 12 months to Oct 24, 2026, 5 ATI insiders reported open-market sales of $82.6M across 21 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $82.6M
- 21 filings · 5 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 18 of 21
- $80.9M of $82.6M sold (98%)
Who traded ATI, and when
- Sale
- Sale, pre-arranged (10b5-1)
ATI daily close from Oct 24, 2025 to Oct 23, 2026, between $89.25 and $231.78, last $156.88. 21 sale and 0 purchase filings by 5 insiders, marked at their filing dates. Kimberly A. Fields, President, CEO and Director → Chair, President and CEO: sold $40.3M across 6 filings, first filed May 12, 2026, last Aug 19, 2026. Robert S. Wetherbee, Executive Chairman: sold $21.2M across 3 filings, first filed Nov 20, 2025, last Feb 19, 2026. Timothy J. Harris, Senior VP and CDIO: sold $19.3M across 9 filings, first filed Nov 5, 2025, last Sep 23, 2026. David J. Morehouse, Director: sold $1.5M across 2 filings, first filed Mar 11, 2026, last Sep 4, 2026. Tina Killough Busch, SVP, CHRO: sold $242.3K across 1 filing, first filed Nov 25, 2025, last Nov 25, 2025.
Largest mark · tap a row for others
Kimberly A. Fields · Chair, President and CEO
Sale $10,698,980
59,749 shares at $179.07 avg
Filed Jun 4, 2026 · traded Jun 2
Pre-arranged (10b5-1) · close on filing date $181.10
Kimberly A. Fields · President, CEO and Director → Chair, President and CEO
President, CEO and Director → Chair, President and CEO
$40.3M soldRobert S. Wetherbee · Executive Chairman
Executive Chairman
$21.2M soldTimothy J. Harris · Senior VP and CDIO
Senior VP and CDIO
$19.3M soldDavid J. Morehouse · Director
Director
$1.5M soldTina Killough Busch · SVP, CHRO
SVP, CHRO
$242.3K soldHas ATI Inc.'s CEO sold stock?
Yes. Kimberly A. Fields (CEO) sold 217,044 shares ($40.3M) between May 2026 and Aug 2026, all under a pre-arranged 10b5-1 plan.
Open-market trades
21 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Kimberly A. Fields | President, CEO and Director → Chair, President and CEO | $40.3M | — | 6 | 100% of sales | |
| Robert S. Wetherbee | Executive Chairman | $21.2M | — | 3 | 100% of sales | |
| Timothy J. Harris | Senior VP and CDIO | $19.3M | — | 9 | 100% of sales | |
| David J. Morehouse | Director | $1.5M | — | 2 | — | |
| Tina Killough Busch | SVP, CHRO | $242.3K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Timothy J. Harris Senior VP and CDIO | SalePre-arranged (10b5-1) | 9,000 | $191.82 | $1.7M | 88,187 | |
traded | Timothy J. Harris Senior VP and CDIO | SalePre-arranged (10b5-1) | 16,500 | $193.06 | $3.2M | 97,187 | |
traded | Timothy J. Harris Senior VP and CDIO | SalePre-arranged (10b5-1) | 16,500 | $207.54 | $3.4M | 113,687 | |
traded | David J. Morehouse Director | Sale | 2,485 | $201.61 | $501.0K | 35,826 | |
traded | Timothy J. Harris Senior VP and CDIO | SalePre-arranged (10b5-1) | 16,500 | $210.01 | $3.5M | 130,187 | |
traded | Timothy J. Harris Senior VP and CDIO | SalePre-arranged (10b5-1) | 16,500 | $206.92 | $3.4M | 146,687 | |
traded | Kimberly A. Fields Chair, President and CEO | SalePre-arranged (10b5-1) | 24,845 | $231.19 | $5.7M | 105,317 | |
traded | Kimberly A. Fields Chair, President and CEO | SalePre-arranged (10b5-1) | 31,757 | $190.99 | $6.1M | 125,564 | |
traded | Kimberly A. Fields Chair, President and CEO | SalePre-arranged (10b5-1) | 40,000 | $182.91 | $7.3M | 157,921 | |
traded | Kimberly A. Fields Chair, President and CEO | SalePre-arranged (10b5-1) | 20,693 | $200.64 | $4.2M | 197,321 | |
traded | Kimberly A. Fields Chair, President and CEO | SalePre-arranged (10b5-1) | 59,749 | $179.07 | $10.7M | 251,940 | |
traded | Kimberly A. Fields President, CEO and Director | SalePre-arranged (10b5-1) | 40,000 | $159.21 | $6.4M | 307,545 | |
traded | David J. Morehouse Director | Sale | 6,609 | $154.25 | $1.0M | 38,168 | |
traded | Robert S. Wetherbee Executive Chairman | SalePre-arranged (10b5-1) | 60,000 | $145.62 | $8.7M | 280,061 | |
traded | Robert S. Wetherbee Executive Chairman | SalePre-arranged (10b5-1) | 60,020 | $109.57 | $6.6M | 126,518 | |
traded | Tina Killough Busch SVP, CHRO | Sale | 2,598 | $93.26 | $242.3K | 21,274 | |
traded | Timothy J. Harris Senior VP and CDIO | SalePre-arranged (10b5-1) | 10,542 | $97.88 | $1.0M | 98,310 | |
traded | Timothy J. Harris Senior VP and CDIO | SalePre-arranged (10b5-1) | 10,542 | $97.77 | $1.0M | 108,852 | |
traded | Robert S. Wetherbee Executive Chairman | SalePre-arranged (10b5-1) | 60,000 | $98.34 | $5.9M | 298,247 | |
traded | Timothy J. Harris Senior VP and CDIO | SalePre-arranged (10b5-1) | 10,543 | $97.69 | $1.0M | 119,394 | |
traded | Timothy J. Harris Senior VP and CDIO | SalePre-arranged (10b5-1) | 10,543 | $96.07 | $1.0M | 129,937 |
GET /stocks/filings/vX/form-4?tickers=ATI&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"ATI"
],
"issuer_cik": "0001018963",
"owner_cik": "0001776844",
"accession_number": "0001193125-26-398695",
"form_type": "4",
"filing_date": "2026-09-23",
"period_of_report": "2026-09-21",
"issuer_name": "ATI INC",
"issuer_trading_symbol": "ATI",
"owner_name": "Harris Timothy J",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Senior VP and CDIO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock, par value $0.10 per share",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-21",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 9000,
"transaction_price_per_share": 191.82,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 88187,
"transaction_value": 1726380,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Shares sold pursuant to a 10b5-1 Trading Plan dated May 21, 2026, entered into for personal tax and estate planning purposes."
}
]
},
{
"tickers": [
"ATI"
],
"issuer_cik": "0001018963",
"owner_cik": "0001776844",
"accession_number": "0001193125-26-393438",
"form_type": "4",
"filing_date": "2026-09-16",
"period_of_report": "2026-09-14",
"issuer_name": "ATI INC",
"issuer_trading_symbol": "ATI",
"owner_name": "Harris Timothy J",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Senior VP and CDIO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock, par value $0.10 per share",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-14",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 16500,
"transaction_price_per_share": 193.06,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 97187,
"transaction_value": 3185490,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Shares sold pursuant to a 10b5-1 Trading Plan dated May 21, 2026, entered into for personal tax and estate planning purposes."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 43 records
- Option exercises5 records
- Tax withholding16 records
- Grants and awards20 records
- Gifts2 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for ATI every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Role
- The title on each filing. Someone whose title changed shows more than one.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.