ATI Institutional Ownership
Top institutional (13F) holders of ATI and 5%+ (13D/G) positions, sourced from SEC EDGAR.
Institutional owners
57
Institutional value
$18.19B
Top holder
BlackRock, Inc.
Top holders
| Holder | Stake | Filed | Value |
|---|---|---|---|
| BlackRock, Inc.holding company | 13.8% | Aug 7, 2026 | $3.69B |
| Vanguard Portfolio Managementinvestment advisor | 4.6% | Aug 13, 2026 | $1.23B |
| Vanguard Capital Managementinvestment advisor | 4.5% | Aug 13, 2026 | $1.21B |
| Capital World Investorsinvestment advisor | 3.9% | Aug 12, 2026 | $1.03B |
| STATE STREET CORPORATIONholding company | 3.9% | Sep 22, 2026 | $1.03B |
| Capital Research Global Investorsinvestment advisor | 3.8% | Aug 12, 2026 | $1B |
| FMR LLCinvestment advisor | 3.7% | Aug 13, 2026 | $983.37M |
| Capital International Investorsinvestment advisor | 2.7% | Aug 12, 2026 | $733.17M |
| Invesco Ltd.holding company | 2.5% | Aug 14, 2026 | $679.86M |
| GEODE CAPITAL MANAGEMENT, LLCinvestment advisor | 2.0% | Nov 6, 2026 | $513.27M |
| MORGAN STANLEYholding company | 1.4% | Aug 13, 2026 | $367.63M |
| BANK OF AMERICA CORP /DE/holding company | 1.3% | Aug 14, 2026 | $348.28M |
| Norges Bankother | 1.3% | Aug 12, 2026 | $342.93M |
| JANE STREET GROUP, LLCholding company | 1.3% | Aug 14, 2026 | $334.8M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INCinvestment advisor | 1.1% | Aug 14, 2026 | $292.35M |
| AQR CAPITAL MANAGEMENT LLCinvestment advisor | 1.1% | Aug 14, 2026 | $282.43M |
| NORTHERN TRUST CORPinvestment advisor | 0.9% | Aug 13, 2026 | $253.98M |
| Point72 Asset Management, L.P.investment advisor | 0.9% | Aug 14, 2026 | $246.17M |
| VIKING GLOBAL INVESTORS LPother | 0.8% | Aug 14, 2026 | $227.43M |
| Dimensional Fund Advisors LPinvestment advisor | 0.8% | Nov 4, 2026 | $216.25M |
| T. Rowe Price Associates, Inc.investment advisor | 0.8% | Aug 14, 2026 | $201.4M |
| MILLENNIUM MANAGEMENT LLCinvestment advisor | 0.7% | Aug 14, 2026 | $174.09M |
| Fisher Asset Management, LLCinvestment advisor | 0.7% | Nov 6, 2026 | $172.36M |
| Ameriprise Financial, Inc.holding company | 0.6% | Aug 14, 2026 | $169.15M |
| Bank of New York Mellon Corpholding company | 0.7% | Nov 5, 2026 | $169.1M |
5%+ holders
Current stakes of 5% or more from Schedule 13D and 13G filings. A joint filing shows once, under its lead filer.
| Holder | Form | Stake | Filed |
|---|---|---|---|
| BlackRock, Inc.holding company | SC 13G/A | 11.9% | Oct 27, 2026 |
| Vanguard Capital Managementinvestment advisor | SC 13G | 5.2% | Apr 29, 2026 |
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Source: SEC EDGAR Schedule 13D / 13G and 13F filings.