ATI
Produces advanced alloys, forgings, and components for aerospace, defense, and demanding industrial applications.
$211.00
After-hours close+0.24 (+0.11%)
At close$210.76(−1.75%)
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Breakdown13F · Form 4
Institutions 117.54%Insiders 0.76%
A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.
Shares outstanding 136.47M · Float 135.08M · 99.0% free float
Institutions13F, as of Jun 30, 2026
828 holders · 160.40M shares · 181 new positions · 484 increased · 223 reduced · 63 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 18.71M | 13.71% | +2.27M | Aug 7, 2026 |
| Vanguard Portfolio Management LLC | 6.22M | 4.56% | +398.4K | Aug 13, 2026 |
| Vanguard Capital Management LLC | 6.16M | 4.52% | +38.3K | Aug 13, 2026 |
| Capital World Investors | 5.25M | 3.85% | −463.7K | Aug 12, 2026 |
| State Street Corp | 5.24M | 3.84% | −143.7K | Aug 7, 2026 |
| Capital Research Global Investors | 5.09M | 3.73% | −1.07M | Aug 12, 2026 |
| FMR LLC | 4.99M | 3.66% | −258.0K | Aug 13, 2026 |
| Capital International Investors | 3.72M | 2.73% | −2.16M | Aug 12, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 10.10% | 13.89M | 13G | Oct 3, 2025 ↗ |
| Vanguard Capital Management | 5.23% | 7.15M | 13G | Apr 29, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Robert S. Wetherbee | director, officer: Executive Chairman | 280.1K | 0.21% | Feb 19, 2026 |
| Timothy J. Harris | officer: Senior VP and CDIO | 146.7K | 0.11% | Aug 26, 2026 |
| Kimberly A. Fields | director, officer: Chair, President and CEO | 100.7K | 0.07% | Aug 19, 2026 |
| J. Brett Harvey | director | 98.9K | 0.07% | May 22, 2025 |
| Carolyn Corvi | director | 71.1K | 0.05% | May 21, 2026 |
| Vaishali S. Bhatia | officer: SVP, General Counsel and CCO | 58.4K | 0.04% | Mar 24, 2026 |
| James Robert Foster | officer: SVP, Finance and CFO | 57.8K | 0.04% | Jul 6, 2026 |
| David J. Morehouse | director | 38.3K | 0.03% | May 21, 2026 |
| Herbert J. Carlisle | director | 37.6K | 0.03% | May 21, 2026 |
| Marianne Kah | director | 35.1K | 0.03% | May 21, 2026 |
34 people have not refiled in the last 18 months (5.42M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 24, 2026 | Timothy J. Harrisofficer: Senior VP and CDIO | Sale | 16,500 | $206.92 | 146,687 |
| Aug 17, 2026 | Kimberly A. Fieldsdirector, officer: Chair, President and CEO | Sale · 5 lots | 24,845 | $231.19 | 100,719 |
| Jul 28, 2026 | Kimberly A. Fieldsdirector, officer: Chair, President and CEO | Sale | 31,757 | $190.99 | 125,564 |
| Jul 7, 2026 | Kimberly A. Fieldsdirector, officer: Chair, President and CEO | Sale · 10 lots | 40,000 | $182.91 | 157,321 |
| Jun 24, 2026 | Kimberly A. Fieldsdirector, officer: Chair, President and CEO | Sale | 3,783 | $197.21 | 197,321 |
| Jun 23, 2026 | Kimberly A. Fieldsdirector, officer: Chair, President and CEO | Sale | 3,641 | $197.48 | 201,104 |
| Jun 22, 2026 | Kimberly A. Fieldsdirector, officer: Chair, President and CEO | Sale | 13,269 | $202.48 | 204,745 |
| Jun 2, 2026 | Kimberly A. Fieldsdirector, officer: Chair, President and CEO | Sale · 6 lots | 59,749 | $179.07 | 218,014 |
| May 11, 2026 | Kimberly A. Fieldsdirector, officer: President, CEO and Director | Sale · 7 lots | 40,000 | $159.21 | 277,763 |
| Mar 9, 2026 | David J. Morehousedirector | Sale · 2 lots | 6,609 | $154.25 | 38,168 |
CongressHouse and Senate disclosures
Not reported.