$ATI insider trading
Over the last 12 months, Ati insiders reported no purchases and 27 sales totaling $79.7M across SEC Form 4 filings. 89% of those filings were made under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- — 0 events
- Sold · 12m
- $79.7M 27 events
- Events · 12m
- 27 Form 4 filings, grouped
- Insiders · 12m
- 5 distinct reporters
- 10b5-1 share
- 89% of events, not dollars
All insider trades
Scroll the table sideways for price, value and marks.
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Sep 14, 2026 | Harris Timothy JSenior VP and CDIO · O | ▼ Sale | 16,500 | $193.06 | $3.2M | -14.5% | plan |
| Sep 8, 2026 | Harris Timothy JSenior VP and CDIO · O | ▼ Sale | 16,500 | $207.54 | $3.4M | -12.7% | plan |
| Sep 2, 2026 | Morehouse David JD | ▼ Sale | 2,485 | $201.61 | $501K | -6.5% | — |
| Aug 31, 2026 | Harris Timothy JSenior VP and CDIO · O | ▼ Sale | 16,500 | $210.01 | $3.5M | -11.2% | plan |
| Aug 24, 2026 | Harris Timothy JSenior VP and CDIO · O | ▼ Sale | 16,500 | $206.92 | $3.4M | -10.1% | plan |
| Aug 17, 2026 | Fields Kimberly AChair, President and CEO · O·D | ▼ Sale | 24,845 | $231.19 | $5.7M | -19.8% | plan · 5 tranches |
| Jul 28, 2026 | Fields Kimberly AChair, President and CEO · O·D | ▼ Sale | 31,757 | $190.99 | $6.1M | -20.2% | plan |
| Jul 7, 2026 | Fields Kimberly AChair, President and CEO · O·D | ▼ Sale | 40,000 | $182.91 | $7.3M | -20.3% | plan · 10 tranches |
| Jun 24, 2026 | Fields Kimberly AChair, President and CEO · O·D | ▼ Sale | 20,693 | $200.64 | $4.2M | -9.5% | plan · 3 tranches |
| Jun 2, 2026 | Fields Kimberly AChair, President and CEO · O·D | ▼ Sale | 3,001 | $182.75 | $548K | -1.4% | plan |
| Jun 2, 2026 | Fields Kimberly AChair, President and CEO · O·D | ▼ Sale | 2,000 | $181.9 | $364K | -0.9% | plan |
| Jun 2, 2026 | Fields Kimberly AChair, President and CEO · O·D | ▼ Sale | 1,896 | $180.8 | $343K | -0.8% | plan |
| Jun 2, 2026 | Fields Kimberly AChair, President and CEO · O·D | ▼ Sale | 13,164 | $179.71 | $2.4M | -5.5% | plan |
| Jun 2, 2026 | Fields Kimberly AChair, President and CEO · O·D | ▼ Sale | 13,865 | $179.05 | $2.5M | -5.5% | plan |
| Jun 2, 2026 | Fields Kimberly AChair, President and CEO · O·D | ▼ Sale | 25,823 | $177.97 | $4.6M | -9.3% | plan |
| Mar 9, 2026 | Morehouse David JD | ▼ Sale | 6,609 | $154.25 | $1.0M | -14.8% | 2 tranches |
| Feb 17, 2026 | WETHERBEE ROBERT SExecutive Chairman · O·D | ▼ Sale | 60,000 | $145.62 | $8.7M | -18.2% | plan · 4 tranches |
| Dec 18, 2025 | WETHERBEE ROBERT SExecutive Chairman · O·D | ▼ Sale | 60,020 | $109.57 | $6.6M | -32.2% | plan · 3 tranches |
| Nov 25, 2025 | Harris Timothy JSenior VP and CDIO · O | ▼ Sale | 10,542 | $97.88 | $1.0M | -9.7% | plan |
| Nov 21, 2025 | Busch Tina KilloughSVP, CHRO · O | ▼ Sale | 2,598 | $93.26 | $242K | -10.9% | — |
| Nov 18, 2025 | WETHERBEE ROBERT SExecutive Chairman · O·D | ▼ Sale | 60,000 | $98.34 | $5.9M | -19.6% | plan · 3 tranches |
| Nov 18, 2025 | Harris Timothy JSenior VP and CDIO · O | ▼ Sale | 10,542 | $97.77 | $1.0M | -8.8% | plan |
| Nov 11, 2025 | Harris Timothy JSenior VP and CDIO · O | ▼ Sale | 10,543 | $97.69 | $1.0M | -8.1% | plan |
| Nov 4, 2025 | Harris Timothy JSenior VP and CDIO · O | ▼ Sale | 10,543 | $96.07 | $1.0M | -7.5% | plan |
| Oct 15, 2025 | Fields Kimberly APresident, CEO and Director · O·D | ▼ Sale | 21,153 | $85.87 | $1.8M | -9.5% | plan |
| Oct 6, 2025 | Fields Kimberly APresident, CEO and Director · O·D | ▼ Sale | 21,154 | $82.03 | $1.7M | -8.6% | plan |
| Sep 22, 2025 | Fields Kimberly APresident, CEO and Director · O·D | ▼ Sale | 20,312 | $80.33 | $1.6M | -7.7% | plan |
| Sep 9, 2025 | Fields Kimberly APresident & CEO · O | ▼ Sale | 15,941 | $77.52 | $1.2M | -5.7% | plan |
Every $ATI filing on this page is one API call away
The same Form 4 data over REST or MCP, already grouped into events with the plan flag and the dollar value read. A free key does 100 calls a day and needs no card. Prefer email? Ati filings can reach your inbox instead.
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. This page shows open-market activity: purchases (code P), sales (S) and dispositions back to the issuer (D). Scheduled compensation events such as stock grants and option exercises are also filed on Form 4 but carry no trading signal, so they are not shown and counts here can be lower than the raw EDGAR filing total. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $ATI feed.