Ati Inc. (ATI) Insider Trading
Directors, officers and holders of more than 10% of ATI report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 172 transactions on file: 0 with code P, 39 with code S and 11 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 21, 2026 | Harris Timothy J | Senior VP and CDIO | S Sale | 9,000 | $191.82 | $1,726,380 |
| Sep 14, 2026 | Harris Timothy J | Senior VP and CDIO | S Sale | 16,500 | $193.06 | $3,185,490 |
| Sep 8, 2026 | Harris Timothy J | Senior VP and CDIO | S Sale | 16,500 | $207.54 | $3,424,410 |
| Sep 2, 2026 | Morehouse David J | Director | S Sale | 2,485 | $201.61 | $501,001 |
| Aug 31, 2026 | Harris Timothy J | Senior VP and CDIO | S Sale | 16,500 | $210.01 | $3,465,165 |
| Aug 24, 2026 | Harris Timothy J | Senior VP and CDIO | S Sale | 16,500 | $206.92 | $3,414,180 |
| Aug 17, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 9,116 | $231.72 | $2,112,360 |
| Aug 17, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 4,598 | $232.43 | $1,068,713 |
| Aug 17, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 2,000 | $229.56 | $459,120 |
| Aug 17, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 8,131 | $230.66 | $1,875,496 |
| Aug 17, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 1,000 | $228.32 | $228,320 |
| Jul 28, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 31,757 | $190.99 | $6,065,269 |
| Jul 7, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 2,000 | $179.25 | $358,500 |
| Jul 7, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 200 | $180.85 | $36,170 |
| Jul 7, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 200 | $186.36 | $37,272 |
| Jul 7, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 400 | $187.50 | $75,000 |
| Jul 7, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 15,908 | $183.50 | $2,919,118 |
| Jul 7, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 4,878 | $184.34 | $899,211 |
| Jul 7, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 11,826 | $182.66 | $2,160,137 |
| Jul 7, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 388 | $185.10 | $71,819 |
| Jul 7, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 2,200 | $181.36 | $398,992 |
| Jul 7, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 2,000 | $180.00 | $360,000 |
| Jul 1, 2026 | Foster James Robert | SVP, Finance and CFO | M Exercise | 163 | $193.82 | $31,593 |
| Jun 24, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 3,783 | $197.21 | $746,045 |
| Jun 23, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 3,641 | $197.48 | $719,025 |
| Jun 22, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 13,269 | $202.48 | $2,686,707 |
| Jun 2, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 13,865 | $179.05 | $2,482,528 |
| Jun 2, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 25,823 | $177.97 | $4,595,719 |
| Jun 2, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 3,001 | $182.75 | $548,433 |
| Jun 2, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 2,000 | $181.90 | $363,800 |
| Jun 2, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 1,896 | $180.80 | $342,797 |
| Jun 2, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 13,164 | $179.71 | $2,365,702 |
| May 19, 2026 | Carlisle Herbert J | Director | A Award | 905 | Not measured | Not measured |
| May 19, 2026 | Sharma Ruby | Director | A Award | 905 | Not measured | Not measured |
| May 19, 2026 | BALL M LEROY | Director | A Award | 905 | Not measured | Not measured |
| May 19, 2026 | Morehouse David J | Director | A Award | 1,743 | Not measured | Not measured |
| May 19, 2026 | Lydon-Rodgers Jean | Director | A Award | 905 | Not measured | Not measured |
| May 19, 2026 | Corvi Carolyn | Director | A Award | 905 | Not measured | Not measured |
| May 19, 2026 | Lund Elizabeth Hefley | Director | A Award | 905 | Not measured | Not measured |
| May 19, 2026 | Kah Marianne | Director | A Award | 905 | Not measured | Not measured |
| May 19, 2026 | Hess David P | Director | A Award | 905 | Not measured | Not measured |
| May 11, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 8,780 | $161.12 | $1,414,634 |
| May 11, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 11,982 | $160.60 | $1,924,309 |
| May 11, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 2,600 | $159.38 | $414,388 |
| May 11, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 6,420 | $158.38 | $1,016,800 |
| May 11, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 3,350 | $157.51 | $527,659 |
| May 11, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 5,568 | $156.29 | $870,223 |
| May 11, 2026 | Fields Kimberly A | Chair, President and CEO | S Sale | 1,300 | $154.02 | $200,226 |
| Mar 20, 2026 | Bhatia Vaishali S. | SVP, General Counsel and CCO | F Tax Payment | 3,509 | $143.95 | $505,121 |
| Mar 9, 2026 | Morehouse David J | Director | S Sale | 5,324 | $154.53 | $822,718 |
The full Form 4 history is on the ATI company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.