AtiATI
13F holders, Q1 2026 (March 31)678holders +108
155new positions
48sold out
13famous investors
$145.23avg. 13F price*
At the end of Q1 2026, 678 institutions reported holding Ati Inc. (ATI) in their 13F filings, up 108 from Q4 2025. 155 opened new positions and 48 sold out. The largest holders were BlackRock, Inc. ($2.4B), Capital Research Global Investors ($896.0M) and Vanguard Capital Management LLC ($890.8M). 13 famous investors held it, including Andreas Halvorsen (1.4% of Viking Global Investors's portfolio), Mario Gabelli (0.5% of GAMCO Investors's portfolio) and Steve Cohen (0.5% of Point72 Asset Management's portfolio).
- Company
- Ati Inc.
- CUSIP
- 01741R102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 155 | $913.7M |
| Exits | 48 | $202.7M |
All 13F filers, Q4 2025 → Q1 2026: 24,230,331 shares bought and 23,482,922 shares sold, net +747,409 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 678 holders
| BlackRock, Inc. | 0.04% | Add +12.1% | 16,441,653 | $2.4B |
| Capital Research Global Investors | 0.14% | Add +70.6% | 6,160,107 | $896.0M |
| Vanguard Capital Management LLC | 0.02% | — | 6,124,128 | $890.8M |
| Capital International Investors | 0.20% | Reduce -65.6% | 5,883,949 | $854.9M |
| Vanguard Portfolio Management LLC | 0.04% | — | 5,821,508 | $846.8M |
| Capital World Investors | 0.11% | Reduce -22.3% | 5,712,929 | $831.0M |
| State Street Corp. | 0.03% | Reduce -3.9% | 5,381,013 | $782.7M |
| FMR LLC | 0.04% | Add +3.4% | 5,247,175 | $763.3M |
| Invesco Ltd. | 0.05% | Add +13.9% | 3,855,643 | $560.8M |
| Viking Global Investors | 1.36% | New | 3,332,843 | $484.8M |
| Geode Capital Management, LLC | 0.03% | Add +21.8% | 2,947,325 | $428.8M |
| Point72 Asset Management | 0.51% | Add +154.2% | 1,932,579 | $281.1M |
| D. E. Shaw & Co. | 0.21% | Reduce -13.8% | 1,742,609 | $253.5M |
| Morgan Stanley | 0.01% | Add +30.0% | 1,668,591 | $242.7M |
| Charles Schwab Investment Management Inc. | 0.03% | Add +1.0% | 1,502,129 | $218.5M |
| Jane Street Group, LLC | 0.24% | Add +438.0% | 1,491,263 | $216.9M |
| UBS Group AG | 0.04% | Add +18.9% | 1,419,080 | $206.4M |
| Dimensional Fund Advisors LP | 0.04% | Reduce -35.7% | 1,366,804 | $198.7M |
| Bank of America Corp. | 0.01% | Add +70.8% | 1,364,941 | $198.5M |
| Dendur Capital LP | 13.92% | Reduce -37.1% | 1,283,103 | $186.6M |
| Northern Trust Corp. | 0.02% | Add +5.5% | 1,239,020 | $180.2M |
| Arrowstreet Capital, Limited Partnership | 0.09% | Add +231.4% | 1,203,726 | $175.1M |
| AQR Capital Management | 0.08% | Add +19.9% | 1,222,580 | $174.1M |
| Holocene Advisors, LP | 0.39% | Add +2.4% | 1,097,588 | $159.7M |
| SG Americas Securities, LLC | 0.17% | Add +1471.8% | 1,075,368 | $156.4M |
| American Century Companies Inc. | 0.08% | Reduce -32.8% | 1,069,282 | $155.5M |
| Bowen Hanes & Co. Inc. | 3.69% | Reduce -11.4% | 1,043,105 | $151.7M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.21% | Add +2.5% | 1,032,774 | $150.2M |
| Ameriprise Financial Inc. | 0.03% | Reduce -19.7% | 998,834 | $145.3M |
| Fisher Asset Management | 0.05% | Add +1.8% | 924,521 | $134.5M |
| Bank of New York Mellon Corp | 0.02% | Reduce -4.8% | 869,184 | $126.4M |
| Qube Research & Technologies Ltd | 0.18% | Add +99.6% | 858,818 | $124.9M |
| Balyasny Asset Management L.P. | 0.26% | Add +118.4% | 851,664 | $123.9M |
| Vanguard Fiduciary Trust Co. | 0.03% | — | 844,377 | $122.8M |
| PNC Financial Services Group, Inc. | 0.07% | Add +1714.0% | 831,736 | $121.0M |
| Prudential Financial Inc. | 0.15% | Add +1.7% | 809,970 | $117.8M |
| Barrow Hanley Mewhinney & Strauss LLC | 0.37% | Reduce -8.8% | 782,466 | $113.8M |
| Artemis Investment Management LLP | 1.11% | New | 721,505 | $105.0M |
| Frontier Capital Management Co. LLC | 1.04% | Reduce -43.4% | 694,422 | $101.0M |
| Loomis Sayles & Co. L P | 0.13% | Reduce -30.2% | 653,416 | $95.0M |
| BNP Paribas Financial Markets | 0.06% | Add +66.0% | 651,996 | $94.8M |
| Raymond James Financial Inc. | 0.03% | Reduce -20.5% | 638,706 | $92.5M |
| Millennium Management | 0.07% | Add +22.2% | 619,240 | $90.1M |
| Assenagon Asset Management S.A. | 0.14% | Add +2162.1% | 584,030 | $85.0M |
| Nuveen, LLC | 0.02% | Add +5.7% | 578,616 | $84.2M |
| Freestone Grove Partners LP | 0.61% | New | 575,873 | $83.8M |
| Federated Hermes, Inc. | 0.13% | Reduce -0.1% | 545,532 | $79.4M |
| Allspring Global Investments Holdings, LLC | 0.13% | Reduce -13.8% | 520,246 | $78.7M |
| Marshall Wace, LLP | 0.08% | Reduce -14.6% | 536,478 | $78.0M |
| Neuberger Berman Group LLC | 0.05% | Reduce -39.8% | 494,925 | $72.0M |
| Bank of Nova Scotia | 0.12% | Add +92.9% | 467,149 | $68.0M |
| Alliancebernstein L.P. | 0.02% | Add +87.8% | 575,528 | $66.0M |
| Goldman Sachs Group Inc. | 0.01% | Add +23.6% | 447,819 | $65.1M |
| Vaughan Nelson Investment Management, L.P. | 0.56% | Add +1.3% | 382,375 | $55.6M |
| JPMorgan Chase & Co. | 0.00% | Add +14.8% | 407,423 | $55.2M |
| ING Groep NV | 0.34% | Add +93.3% | 377,500 | $54.9M |
| Schroder Investment Management Group | 0.04% | Reduce -11.2% | 402,593 | $54.6M |
| Square Wave Capital, LLC | 12.89% | New | 366,400 | $53.3M |
| GAMCO Investors | 0.52% | Reduce -5.6% | 361,500 | $52.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.01% | Add +0.7% | 354,737 | $51.6M |
| Rhumbline Advisers | 0.04% | Add +2.0% | 354,371 | $51.5M |
| Wells Fargo & Company | 0.01% | Add +61.3% | 351,142 | $51.1M |
| Jupiter Asset Management Ltd. | 0.27% | Add +173.0% | 341,677 | $49.7M |
| T. Rowe Price Associates Inc. | 0.01% | Reduce -34.0% | 328,732 | $47.8M |
| Retirement Systems of Alabama | 0.15% | Add +1.1% | 312,287 | $45.4M |
| Citadel Advisors | 0.03% | Add +195.3% | 303,296 | $44.1M |
| Principal Financial Group Inc. | 0.02% | Add +3.8% | 303,158 | $44.1M |
| Segall Bryant & Hamill, LLC | 0.58% | Reduce -13.8% | 277,371 | $40.3M |
| Swiss National Bank | 0.02% | Reduce -1.1% | 268,800 | $39.1M |
| Allianz Asset Management GmbH | 0.04% | Add +10.4% | 267,834 | $39.0M |
| Jain Global LLC | 0.52% | Reduce -60.3% | 264,476 | $38.5M |
| KLCM Advisors, Inc. | 3.33% | Reduce -18.5% | 262,839 | $38.2M |
| Amundi | 0.01% | Add +775.0% | 261,186 | $38.0M |
| Gotham Asset Management | 0.12% | Reduce -10.5% | 260,488 | $37.9M |
| California Public Employees Retirement System | 0.02% | Reduce -0.3% | 253,797 | $36.9M |
| HRT Financial LP | 0.09% | Add +294.6% | 252,898 | $36.8M |
| Blair William & Co. | 0.10% | Add +437.4% | 236,996 | $34.5M |
| Capital International, Inc. | 0.26% | Reduce -27.9% | 234,928 | $34.2M |
| Envestnet Asset Management Inc. | 0.01% | Add +240.8% | 215,778 | $31.4M |
| Driehaus Capital Management LLC | 0.23% | Reduce -0.2% | 212,734 | $30.9M |
| Legal & General Group Plc | 0.01% | Reduce -5.7% | 211,998 | $30.8M |
| State of Wisconsin Investment Board | 0.07% | Reduce -11.7% | 201,963 | $29.4M |
| Hawk Ridge Capital Management LP | 0.98% | Reduce -11.4% | 185,600 | $27.0M |
| Aventail Capital Group, LP | 1.30% | New | 185,312 | $27.0M |
| Lord, Abbett & Co. LLC | 0.09% | Reduce -31.8% | 182,049 | $26.5M |
| Emerald Advisers, LLC | 0.84% | Reduce -41.0% | 181,485 | $26.4M |
| Royal Bank of Canada | 0.00% | Add +124.3% | 171,029 | $24.9M |
| Canada Pension Plan Investment Board | 0.02% | Reduce -31.7% | 167,726 | $24.4M |
| LPL Financial LLC | 0.01% | Add +148.5% | 165,570 | $24.1M |
| Panagora Asset Management Inc. | 0.09% | Add +550.8% | 165,531 | $24.1M |
| California State Teachers Retirement System | 0.02% | Add +21.0% | 157,761 | $22.9M |
| 1832 Asset Management L.P. | 0.03% | Reduce -48.5% | 151,514 | $22.0M |
| Walleye Capital LLC | 0.14% | Add +42.8% | 146,109 | $21.3M |
| Senator Investment Group LP | 0.97% | Reduce -55.4% | 145,000 | $21.1M |
| New York State Teachers Retirement System | 0.04% | Reduce -9.0% | 134,642 | $19.6M |
| Natixis Advisors, LLC | 0.03% | Reduce -17.8% | 124,277 | $18.1M |
| Nomura Asset Management International Inc. | 0.03% | Reduce -51.1% | 117,121 | $17.0M |
| Sanctuary Advisors, LLC | 0.09% | Reduce -14.5% | 115,616 | $16.8M |
| Russell Investments Group, Ltd. | 0.02% | Add +263.9% | 109,249 | $15.9M |
| Deutsche Bank AG | 0.01% | Reduce -2.9% | 107,889 | $15.7M |
"% of holder's portfolio" is ATI's weight in each manager's 13F, not the share of Ati Inc. the manager owns.