ATI insider buying and SEC filings, explained
ATI Inc. · CIK 1018963
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$1.8M
Planned sales (10b5-1)
$76.0M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Sep 21, 2026 | Planned (10b5-1) | Timothy J Harris (Senior VP and CDIO) sold 9,000 shares at $191.82 ($1.7M), marked as a 10b5-1 plan trade. Holdings down 9% to 88,187 shares. | SEC filing Filed Sep 23, 2026 |
| Sep 14, 2026 | Planned (10b5-1) | Timothy J Harris (Senior VP and CDIO) sold 16,500 shares at $193.06 ($3.2M), marked as a 10b5-1 plan trade. Holdings down 15% to 97,187 shares. | SEC filing Filed Sep 16, 2026 |
| Sep 8, 2026 | Planned (10b5-1) | Timothy J Harris (Senior VP and CDIO) sold 16,500 shares at $207.54 ($3.4M), marked as a 10b5-1 plan trade. Holdings down 13% to 113,687 shares. | SEC filing Filed Sep 10, 2026 |
| Sep 2, 2026 | Sale | David J Morehouse (Director) sold 2,485 shares at about $201.61 ($501K). Holdings down 6% to 35,826 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 4, 2026 |
| Aug 31, 2026 | Planned (10b5-1) | Timothy J Harris (Senior VP and CDIO) sold 16,500 shares at $210.01 ($3.5M), marked as a 10b5-1 plan trade. Holdings down 11% to 130,187 shares. | SEC filing Filed Sep 2, 2026 |
| Aug 24, 2026 | Planned (10b5-1) | Timothy J Harris (Senior VP and CDIO) sold 16,500 shares at $206.92 ($3.4M), marked as a 10b5-1 plan trade. Holdings down 10% to 146,687 shares. | SEC filing Filed Aug 26, 2026 |
| Aug 17, 2026 | Planned (10b5-1) | Kimberly A Fields (CEO and Director) sold 24,845 shares at about $231.19 ($5.7M), marked as a 10b5-1 plan trade. Holdings down 20% to 100,719 shares. | SEC filing Filed Aug 19, 2026 |
| Jul 28, 2026 | Planned (10b5-1) | Kimberly A Fields (CEO and Director) sold 31,757 shares at $190.99 ($6.1M), marked as a 10b5-1 plan trade. Holdings down 20% to 125,564 shares. | SEC filing Filed Jul 30, 2026 |
| Jul 7, 2026 | Planned (10b5-1) | Kimberly A Fields (CEO and Director) sold 40,000 shares at about $182.91 ($7.3M), marked as a 10b5-1 plan trade. Holdings down 20% to 157,321 shares. | SEC filing Filed Jul 9, 2026 |
| Jun 22–24, 2026 | Planned (10b5-1) | Kimberly A Fields (CEO and Director) sold 20,693 shares between Jun 22 and Jun 24 at about $200.64 ($4.2M), marked as a 10b5-1 plan trade. Holdings down 9% to 197,321 shares. | SEC filing Filed Jun 24, 2026 |
| Jun 2, 2026 | Planned (10b5-1) | Kimberly A Fields (CEO and Director) sold 59,749 shares at about $179.07 ($10.7M), marked as a 10b5-1 plan trade. Holdings down 22% to 218,014 shares. | SEC filing Filed Jun 4, 2026 |
| May 11, 2026 | Planned (10b5-1) | Kimberly A Fields (CEO and Director) sold 40,000 shares at about $159.21 ($6.4M), marked as a 10b5-1 plan trade. Holdings down 13% to 277,763 shares. | SEC filing Filed May 12, 2026 |
| Mar 9, 2026 | Sale | David J Morehouse (Director) sold 6,609 shares at about $154.25 ($1.0M). Holdings down 15% to 38,168 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 11, 2026 |
| Feb 10–17, 2026 | Planned (10b5-1) | Robert S. Wetherbee (Chair and Director) sold 31,276 shares between Feb 10 and Feb 17 at about $145.21 ($4.5M), marked as a 10b5-1 plan trade. Holdings down 9% to 308,785 shares. | SEC filing Filed Feb 19, 2026 |
| Dec 18, 2025 | Planned (10b5-1) | Robert S. Wetherbee (Chair and Director) sold 53,862 shares at about $109.48 ($5.9M), marked as a 10b5-1 plan trade. Holdings down 29% to 132,676 shares. | SEC filing Filed Dec 19, 2025 |
| Nov 25, 2025 | Planned (10b5-1) | Timothy J Harris (Senior VP and CDIO) sold 10,542 shares at $97.88 ($1.0M), marked as a 10b5-1 plan trade. Holdings down 10% to 98,310 shares. | SEC filing Filed Nov 25, 2025 |
| Nov 21, 2025 | Sale | Tina Killough Busch (SVP, CHRO) sold 2,598 shares at $93.26 ($242K). Holdings down 11% to 21,274 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 25, 2025 |
| Nov 18, 2025 | Planned (10b5-1) | Robert S. Wetherbee (Chair and Director) sold 60,000 shares at about $98.34 ($5.9M), marked as a 10b5-1 plan trade. Holdings down 20% to 246,538 shares. | SEC filing Filed Nov 20, 2025 |
| Nov 18, 2025 | Planned (10b5-1) | Timothy J Harris (Senior VP and CDIO) sold 10,542 shares at $97.77 ($1.0M), marked as a 10b5-1 plan trade. Holdings down 9% to 108,852 shares. | SEC filing Filed Nov 20, 2025 |
| Nov 11, 2025 | Planned (10b5-1) | Timothy J Harris (Senior VP and CDIO) sold 10,543 shares at $97.69 ($1.0M), marked as a 10b5-1 plan trade. Holdings down 8% to 119,394 shares. | SEC filing Filed Nov 12, 2025 |
| Nov 4, 2025 | Planned (10b5-1) | Timothy J Harris (Senior VP and CDIO) sold 10,543 shares at $96.07 ($1.0M), marked as a 10b5-1 plan trade. Holdings down 8% to 129,937 shares. | SEC filing Filed Nov 5, 2025 |
28 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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