Insider Trading
Current insider transactions (SEC Form 4) — buys and sells by officers, directors, and major shareholders.
| Ticker | Insider | Title | Date | Transaction | Price ($) | Shares | Value ($) | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|
| ATI | Harris Timothy J | Senior VP and CDIO | 09/14/2026 | Verkauf | 193.06 | 16,500 | 3,185,490 | Form 4 |
| ATI | Harris Timothy J | Senior VP and CDIO | 09/08/2026 | Verkauf | 207.54 | 16,500 | 3,424,410 | Form 4 |
| ATI | Morehouse David J | Director | 09/02/2026 | Verkauf | 201.61 | 2,485 | 501,001 | Form 4 |
| ATI | Harris Timothy J | Senior VP and CDIO | 08/31/2026 | Verkauf | 210.01 | 16,500 | 3,465,165 | Form 4 |
| ATI | Harris Timothy J | Senior VP and CDIO | 08/24/2026 | Verkauf | 206.92 | 16,500 | 3,414,180 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 08/17/2026 | Verkauf | 232.43 | 4,598 | 1,068,713 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 08/17/2026 | Verkauf | 231.72 | 9,116 | 2,112,360 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 08/17/2026 | Verkauf | 230.66 | 8,131 | 1,875,496 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 08/17/2026 | Verkauf | 229.56 | 2,000 | 459,120 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 08/17/2026 | Verkauf | 228.32 | 1,000 | 228,320 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 07/28/2026 | Verkauf | 190.99 | 31,757 | 6,065,269 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 07/07/2026 | Verkauf | 187.50 | 400 | 75,000 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 07/07/2026 | Verkauf | 185.10 | 388 | 71,819 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 07/07/2026 | Verkauf | 184.34 | 4,878 | 899,211 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 07/07/2026 | Verkauf | 183.50 | 15,908 | 2,919,118 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 07/07/2026 | Verkauf | 182.66 | 11,826 | 2,160,137 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 07/07/2026 | Verkauf | 181.36 | 2,200 | 398,992 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 07/07/2026 | Verkauf | 186.36 | 200 | 37,272 | Form 4 |
| ATI | Fields Kimberly A | Chair, President and CEO | 07/07/2026 | Verkauf | 180.00 | 2,000 | 360,000 | Form 4 |
A compact market overview — not investment advice. Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q).