Ati Inc
ATI- Exchange
- NYSE
- Industry
- Steel Pipe & Tubes
- SEC CIK
- 0001018963
In the last 90 days, Ati Inc insiders filed 0 open-market purchases and 9 sales; 795 institutions reported holding it in 13F filings for Q2 2026, worth $25.2B in total; 3 superinvestors hold it, including Viking Global Investors and Soros Fund Management.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $34.8M in total
- 9
- 13F holdersQ2 2026, +124 vs. previous quarter
- 795
- 13F valueReported value at the end of Q2 2026
- $25.2B
- Superinvestors holdingAt the end of Q2 2026
- 3
Price chart
Superinvestors holding ATI, Q2 2026
3 superinvestors report holding Ati Inc on Form 13F. Percentages are the stock's share of each portfolio.
Viking Global Investors
Andreas Halvorsen
0.6%
Ati Inc's share of the portfolio
- Shares
- 1,153,880
- Value
- $227.4M
| Superinvestor | Weight | Value |
|---|---|---|
| ARK Invest | <0.1% | $96.0K |
Latest insider trades
Open-market purchases and sales by Ati Inc insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 23, 2026 (view filing)10:32 AM ET | Sep 21 | 2 days | Harris Timothy JSenior VP and CDIO | SSaleCommon Stock, par value $0.10 per share | −9.00K | $191.82 | −$1.73M | −9.3%88.2K after | 10b5-1 |
| Sep 16, 2026 (view filing)8:20 PM ET | Sep 14 | 2 days | Harris Timothy JSenior VP and CDIO | SSaleCommon Stock, par value $0.10 per share | −16.5K | $193.06 | −$3.19M | −14.5%97.2K after | 10b5-1 |
| Sep 10, 2026 (view filing)4:12 PM ET | Sep 8 | 2 days | Harris Timothy JSenior VP and CDIO | SSaleCommon Stock, par value $0.10 per share | −16.5K | $207.54 | −$3.42M | −12.7%113.7K after | 10b5-1 |
| Sep 4, 2026 (view filing)4:24 PM ET | Sep 2 | 2 days | Morehouse David JDirector | SSaleCommon Stock, par value $0.10 per share | −2.48K | $201.61 | −$501.0K | −6.5%35.8K after | |
| Sep 2, 2026 (view filing)5:41 PM ET | Aug 31 | 2 days | Harris Timothy JSenior VP and CDIO | SSaleCommon Stock, par value $0.10 per share | −16.5K | $210.01 | −$3.47M | −11.2%130.2K after | 10b5-1 |
| Aug 26, 2026 (view filing)3:57 PM ET | Aug 24 | 2 days | Harris Timothy JSenior VP and CDIO | SSaleCommon Stock, par value $0.10 per share | −16.5K | $206.92 | −$3.41M | −10.1%146.7K after | 10b5-1 |
| Aug 19, 2026 (view filing)5:05 PM ET | Aug 17 | 2 days | Fields Kimberly AChair, President and CEO | SSaleCommon Stock, par value $0.10 per share | −24.8K | $231.19 | −$5.74M | −19.8%100.7K after | 5 lots10b5-1 |
| Jul 30, 2026 (view filing)4:43 PM ET | Jul 28 | 2 days | Fields Kimberly AChair, President and CEO | SSaleCommon Stock, par value $0.10 per share | −31.8K | $190.99 | −$6.07M | −20.2%125.6K after | 10b5-1 |
| Jul 9, 2026 (view filing)4:33 PM ET | Jul 7 | 2 days | Fields Kimberly AChair, President and CEO | SSaleCommon Stock, par value $0.10 per share | −40.0K | $182.91 | −$7.32M | −20.3%157.3K after | 10 lots10b5-1 |
| Jun 24, 2026 (view filing) | Jun 22-24 | 2 days | Fields Kimberly AChair, President and CEO | SSaleCommon Stock, par value $0.10 per share | −20.7K | $200.64 | −$4.15M | −9.5%197.3K after | 3 lots10b5-1 |
Top 10 13F holders, Q2 2026
The largest institutional positions in Ati Inc at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 18,708,922 | $3.69B | 0.05% | +2,267,269+13.8% | Added |
| Vanguard Portfolio Management LLC | 6,219,875 | $1.23B | 0.06% | +398,367+6.8% | Added |
| Vanguard Capital Management LLC | 6,162,418 | $1.21B | 0.03% | +38,290+0.6% | Added |
| Capital World Investors | 5,249,249 | $1.03B | 0.12% | −463,680−8.1% | Reduced |
| State Street Corp | 5,237,299 | $1.03B | 0.03% | −143,714−2.7% | Reduced |
| Capital Research Global Investors | 5,093,768 | $1.00B | 0.14% | −1,066,339−17.3% | Reduced |
| FMR LLC | 4,989,171 | $983.4M | 0.04% | −258,004−4.9% | Reduced |
| Capital International Investors | 3,719,485 | $733.2M | 0.15% | −2,164,464−36.8% | Reduced |
| Invesco Ltd. | 3,449,291 | $679.9M | 0.05% | −406,352−10.5% | Reduced |
| Geode Capital Management, LLC | 2,777,512 | $547.6M | 0.03% | −169,813−5.8% | Reduced |