21 institutions reported holding $143.6M of ATI INC (ATI) in SEC 13F filings for 2026-06-30. Largest institutional holders: Assenagon Asset Management S.A. ($129.5M), Hennion & Walsh Asset Management, Inc. ($7.3M), PVG ASSET MANAGEMENT CORP ($2.1M), Central Pacific Bank - Trust Division ($1.2M), GAMMA Investing LLC ($944,700). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Assenagon Asset Management S.A. | $129.5M | 657,117 | Added |
| 2 | Hennion & Walsh Asset Management, Inc. | $7.3M | 36,829 | Added |
| 3 | PVG ASSET MANAGEMENT CORP | $2.1M | 10,475 | New |
| 4 | Central Pacific Bank - Trust Division | $1.2M | 6,308 | Hold |
| 5 | GAMMA Investing LLC | $944,700 | 4,793 | Added |
| 6 | THURSTON, SPRINGER, MILLER, HERD & TITAK, INC. | $568,793 | 2,886 | New |
| 7 | GK Wealth Management LLC | $416,866 | 2,115 | New |
| 8 | Versant Capital Management, Inc | $328,369 | 1,666 | Trimmed |
| 9 | Marathon Mission, Inc. | $293,285 | 1,488 | Hold |
| 10 | Dynamic Advisor Solutions LLC | $237,900 | 1,207 | New |
| 11 | 55 North Private Wealth, LLC | $235,534 | 1,195 | New |
| 12 | Hilltop National Bank | $165,958 | 842 | Hold |
| 13 | HARBOR INVESTMENT ADVISORY, LLC | $114,515 | 581 | New |
| 14 | Cedar Mountain Advisors, LLC | $105,449 | 535 | Hold |
| 15 | MassMutual Private Wealth & Trust, FSB | $78,446 | 398 | Trimmed |
| 16 | CoreCap Advisors, LLC | $30,353 | 154 | New |
| 17 | Dogwood Wealth Management LLC | $7,687 | 39 | New |
| 18 | CX Institutional | $3,000 | 16 | Hold |
| 19 | ELEVATION WEALTH PARTNERS, LLC | $1,971 | 10 | New |
| 20 | Grove Bank & Trust | $394 | 2 | New |
| 21 | Longview Financial Advisors, Inc. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30