ATI Inc. (ATI) — insider trading
Industrials · NYSE
ATI Inc. (ATI) has 48 reported SEC Form 4 insider transactions in our data, including 38 open-market sales among the most recent 48 (latest 2026-09-21).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-21 | Harris Timothy J | Officer (Senior VP and CDIO) | Open-market sale | 9,000 | $191.82 | $1.73M | Form 4 |
| 2026-09-14 | Harris Timothy J | Officer (Senior VP and CDIO) | Open-market sale | 16,500 | $193.06 | $3.19M | Form 4 |
| 2026-09-08 | Harris Timothy J | Officer (Senior VP and CDIO) | Open-market sale | 16,500 | $207.54 | $3.42M | Form 4 |
| 2026-09-02 | Morehouse David J | Director | Open-market sale | 2,485 | $201.61 | $501.0K | Form 4 |
| 2026-08-31 | Harris Timothy J | Officer (Senior VP and CDIO) | Open-market sale | 16,500 | $210.01 | $3.47M | Form 4 |
| 2026-08-24 | Harris Timothy J | Officer (Senior VP and CDIO) | Open-market sale | 16,500 | $206.92 | $3.41M | Form 4 |
| 2026-08-17 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 4,598 | $232.43 | $1.07M | Form 4 |
| 2026-08-17 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 9,116 | $231.72 | $2.11M | Form 4 |
| 2026-08-17 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 8,131 | $230.66 | $1.88M | Form 4 |
| 2026-08-17 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 2,000 | $229.56 | $459.1K | Form 4 |
| 2026-08-17 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 1,000 | $228.32 | $228.3K | Form 4 |
| 2026-07-28 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 31,757 | $190.99 | $6.07M | Form 4 |
| 2026-07-07 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 400 | $187.50 | $75.0K | Form 4 |
| 2026-07-07 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 200 | $186.36 | $37.3K | Form 4 |
| 2026-07-07 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 388 | $185.10 | $71.8K | Form 4 |
| 2026-07-07 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 4,878 | $184.34 | $899.2K | Form 4 |
| 2026-07-07 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 15,908 | $183.50 | $2.92M | Form 4 |
| 2026-07-07 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 11,826 | $182.66 | $2.16M | Form 4 |
| 2026-07-07 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 2,200 | $181.36 | $399.0K | Form 4 |
| 2026-07-07 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 200 | $180.85 | $36.2K | Form 4 |
| 2026-07-07 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 2,000 | $180.00 | $360.0K | Form 4 |
| 2026-07-07 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 2,000 | $179.25 | $358.5K | Form 4 |
| 2026-07-01 | Foster James Robert | Officer (SVP, Finance and CFO) | Option exercise / conversion | 163 | $193.82 | $31.6K | Form 4 |
| 2026-06-24 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 3,783 | $197.21 | $746.0K | Form 4 |
| 2026-06-23 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 3,641 | $197.48 | $719.0K | Form 4 |
| 2026-06-22 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 13,269 | $202.48 | $2.69M | Form 4 |
| 2026-06-02 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 3,001 | $182.75 | $548.4K | Form 4 |
| 2026-06-02 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 2,000 | $181.90 | $363.8K | Form 4 |
| 2026-06-02 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 1,896 | $180.80 | $342.8K | Form 4 |
| 2026-06-02 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 13,164 | $179.71 | $2.37M | Form 4 |
| 2026-06-02 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 13,865 | $179.05 | $2.48M | Form 4 |
| 2026-06-02 | Fields Kimberly A | Director, Officer (Chair, President and CEO) | Open-market sale | 25,823 | $177.97 | $4.60M | Form 4 |
| 2026-05-19 | BALL M LEROY | Director | Grant / award / vesting | 905 | — | $0 | Form 4 |
| 2026-05-19 | Carlisle Herbert J | Director | Grant / award / vesting | 905 | — | $0 | Form 4 |
| 2026-05-19 | Corvi Carolyn | Director | Grant / award / vesting | 905 | — | $0 | Form 4 |
| 2026-05-19 | Hess David P | Director | Grant / award / vesting | 905 | — | $0 | Form 4 |
| 2026-05-19 | Kah Marianne | Director | Grant / award / vesting | 905 | — | $0 | Form 4 |
| 2026-05-19 | Lund Elizabeth Hefley | Director | Grant / award / vesting | 905 | — | $0 | Form 4 |
| 2026-05-19 | Lydon-Rodgers Jean | Director | Grant / award / vesting | 905 | — | $0 | Form 4 |
| 2026-05-19 | Morehouse David J | Director | Grant / award / vesting | 1,743 | — | $0 | Form 4 |
| 2026-05-19 | Sharma Ruby | Director | Grant / award / vesting | 905 | — | $0 | Form 4 |
| 2026-05-11 | Fields Kimberly A | Director, Officer (President, CEO and Director) | Open-market sale | 8,780 | $161.12 | $1.41M | Form 4 |
| 2026-05-11 | Fields Kimberly A | Director, Officer (President, CEO and Director) | Open-market sale | 11,982 | $160.60 | $1.92M | Form 4 |
| 2026-05-11 | Fields Kimberly A | Director, Officer (President, CEO and Director) | Open-market sale | 2,600 | $159.38 | $414.4K | Form 4 |
| 2026-05-11 | Fields Kimberly A | Director, Officer (President, CEO and Director) | Open-market sale | 6,420 | $158.38 | $1.02M | Form 4 |
| 2026-05-11 | Fields Kimberly A | Director, Officer (President, CEO and Director) | Open-market sale | 3,350 | $157.51 | $527.7K | Form 4 |
| 2026-05-11 | Fields Kimberly A | Director, Officer (President, CEO and Director) | Open-market sale | 5,568 | $156.29 | $870.2K | Form 4 |
| 2026-05-11 | Fields Kimberly A | Director, Officer (President, CEO and Director) | Open-market sale | 1,300 | $154.02 | $200.2K | Form 4 |
Ask the chat about ATI's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: ATI Inc. (ATI).
Last updated 2026-09-21 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.