ATI Inc. (ATI) Shareholders & Insider Trades
ATI shareholders at a glance
The largest holder of ATI stock is BlackRock Advisors LLC, with 16.5 million shares (12.10% of the company), worth about $3.37 billion as of September 25, 2026. The 10 largest holders together own 43.6%.
In Q2 2026, 841 institutional holdings reports listed shares worth $25.40 billion.
Insiders reported 53 transactions in the last two years: 26 sales worth $65.29 million and no purchases. The newest one on file is from May 11, 2026 (Fields Kimberly A, Chief Executive Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 11, 2026.
ATI Inc.
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest ATI shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 16.5 million | 12.10% | $3.4B |
| Vanguard Portfolio Management LLC | 6.2 million | 4.57% | $1.3B |
| Vanguard Capital Management LLC | 6.2 million | 4.53% | $1.3B |
| Capital Research & Management Co. (World Investors) | 5.2 million | 3.85% | $1.1B |
| State Street Corporation | 5.2 million | 3.85% | $1.1B |
| Capital Research & Management Co. (Global Investors) | 5.1 million | 3.74% | $1.0B |
| Fidelity Management & Research Co. LLC | 5.0 million | 3.65% | $1.0B |
| Capital Research & Management Co. (International Investors) | 3.7 million | 2.73% | $760.0M |
| Invesco Advisers, Inc. | 3.4 million | 2.53% | $704.0M |
| Geode Capital Management LLC | 2.8 million | 2.04% | $567.0M |
As of September 25, 2026.
ATI institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 841 | – | $25.4B |
| Q1 2026 | 716 | 127.0 million | $18.5B |
| Q4 2025 | 607 | 129.0 million | $14.8B |
| Q3 2025 | 505 | 129.0 million | $10.5B |
| Q2 2025 | 504 | 138.0 million | $11.9B |
| Q1 2025 | 446 | 134.0 million | $7.0B |
| Q4 2024 | 418 | 136.0 million | $7.5B |
| Q3 2024 | 441 | 133.0 million | $8.9B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
ATI insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Fields Kimberly A | May 11, 2026 | Chief Executive Officer | Sale at price 154.02 - 161.12 per share. | $6.4M |
| Morehouse David J | Mar 9, 2026 | Director | Sale at price 153.11 - 154.53 per share. | $1.0M |
| Wetherbee Robert S | Feb 17, 2026 | Officer and Director | Sale at price 144.01 - 146.67 per share. | $8.7M |
| Ball Leroy M. Jr. | Feb 17, 2026 | Director | Stock Gift at price 0.00 per share. | – |
| Wetherbee Robert S | Jan 5, 2026 | Officer and Director | -- | – |
| Fields Kimberly A | Jan 5, 2026 | Chief Executive Officer | -- | – |
| Harris Timothy J | Jan 5, 2026 | Officer | -- | – |
| Wetherbee Robert S | Jan 5, 2026 | Officer and Director | Stock Award(Grant) at price 0.00 per share. | – |
| Fields Kimberly A | Jan 5, 2026 | Chief Executive Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Harris Timothy J | Jan 5, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Bhatia Vaishali S | Jan 5, 2026 | General Counsel | Stock Award(Grant) at price 0.00 per share. | – |
| Miller Michael Benjamin | Jan 5, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
Newest 12 of 53 insider transactions in the last two years.
Questions and answers
Who owns the most ATI stock?
BlackRock Advisors LLC, with 12.10% of the company (as of September 25, 2026). Next: Vanguard Portfolio Management LLC (4.57%) and Vanguard Capital Management LLC (4.53%).
How many institutions own ATI stock?
841 institutional holdings reports listed ATI shares in Q2 2026 worth $25.40 billion.
Are ATI insiders buying or selling the stock?
In the last two years insiders reported 26 sales and no purchases (53 transactions in all); the newest on file is from May 11, 2026.
