Ati Inc
ATI- Exchange
- NYSE
- Industry
- Steel Pipe & Tubes
- SEC CIK
- 0001018963
In the last 90 days, Ati Inc insiders filed 0 open-market purchases and 9 sales; 795 institutions reported holding it in 13F filings for Q2 2026, worth $25.1B in total; 3 superinvestors hold it, including Viking Global Investors and Soros Fund Management.
13F holders, Q1 2026
Institutional positions in Ati Inc as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 678
- +116 vs. Q4 2025
- Shares held
- 127.4M
- +13.8M (+12.2%) vs. Q4 2025
- Total value
- $18.5B
- +$5.46B (+41.9%) vs. Q4 2025
- New holders
- 167
- 246 more added
- Sold out
- 51
- 189 more reduced
8 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ATI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 795 | $25.1B |
| Q1 2026 | 678 | $18.5B |
| Q4 2025 | 570 | $14.7B |
| Q3 2025 | 470 | $10.5B |
| Q2 2025 | 473 | $11.6B |
| Q1 2025 | 426 | $6.97B |
| Q4 2024 | 403 | $7.51B |
| Q3 2024 | 421 | $8.89B |
| Q2 2024 | 403 | $7.33B |
| Q1 2024 | 345 | $6.89B |
| Q4 2023 | 349 | $6.10B |
| Q3 2023 | 338 | $5.48B |
| Q2 2023 | 329 | $5.95B |
| Q1 2023 | 339 | $5.29B |
| Q4 2022 | 304 | $3.95B |
| Q3 2022 | 290 | $3.49B |
| Q2 2022 | 266 | $3.02B |
| Q1 2022 | 284 | $3.51B |
| Q4 2021 | 241 | $2.10B |
| Q3 2021 | 236 | $2.21B |
| Q2 2021 | 237 | $2.77B |
| Q1 2021 | 234 | $2.72B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Ati Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Capital International Inc | 234,928 | $34.2M | 0.26% | −91,126−27.9% | Reduced |
| Blair William & Co | 236,996 | $34.5M | 0.10% | +192,894+437.4% | Added |
| HRT Financial LP | 252,898 | $36.8M | 0.09% | +188,807+294.6% | Added |
| California Public Employees Retirement System | 253,797 | $36.9M | 0.02% | −892−0.4% | Reduced |
| Gotham Asset Management, LLC | 260,488 | $37.9M | 0.12% | −30,508−10.5% | Reduced |
| Amundi | 261,186 | $38.0M | 0.01% | +231,336+775.0% | Added |
| KLCM Advisors, Inc. | 262,839 | $38.2M | 3.33% | −59,825−18.5% | Reduced |
| Jain Global LLC | 264,476 | $38.5M | 0.49% | −400,800−60.2% | Reduced |
| Allianz Asset Management GmbH | 267,834 | $39.0M | 0.04% | +25,323+10.4% | Added |
| Swiss National Bank | 268,800 | $39.1M | 0.02% | −2,900−1.1% | Reduced |
| Segall Bryant & Hamill, LLC | 277,371 | $40.3M | 0.58% | −44,322−13.8% | Reduced |
| Principal Financial Group Inc | 303,158 | $44.1M | 0.02% | +11,014+3.8% | Added |
| Citadel Advisors LLC | 303,296 | $44.1M | 0.03% | +200,594+195.3% | Added |
| Retirement Systems of Alabama | 312,287 | $45.4M | 0.15% | +3,504+1.1% | Added |
| Price T Rowe Associates Inc | 328,732 | $47.8M | 0.01% | −169,445−34.0% | Reduced |
| Jupiter Asset Management Ltd | 341,677 | $49.7M | 0.27% | +216,538+173.0% | Added |
| Wells Fargo & Company | 351,142 | $51.1M | 0.01% | +133,389+61.3% | Added |
| Rhumbline Advisers | 354,371 | $51.5M | 0.04% | +6,823+2.0% | Added |
| UBS Asset Management Americas Inc | 354,737 | $51.6M | 0.01% | +2,421+0.7% | Added |
| Gamco Investors, Inc. Et Al | 361,500 | $52.6M | 0.52% | −21,600−5.6% | Reduced |
| Square Wave Capital, LLC | 366,400 | $53.3M | 12.89% | +366,400 | New |
| Schroder Investment Management Group | 402,593 | $54.6M | 0.04% | −50,952−11.2% | Reduced |
| ING Groep NV | 377,500 | $54.9M | 0.34% | +182,200+93.3% | Added |
| JPMorgan Chase & Co | 407,423 | $55.2M | 0.00% | +52,542+14.8% | Added |
| Vaughan Nelson Investment Management, L.P. | 382,375 | $55.6M | 0.56% | +4,825+1.3% | Added |
| Goldman Sachs Group Inc | 447,819 | $65.1M | 0.01% | +85,432+23.6% | Added |
| Alliancebernstein L.P. | 575,528 | $66.0M | 0.02% | +269,011+87.8% | Added |
| Bank of Nova Scotia | 467,149 | $68.0M | 0.12% | +224,949+92.9% | Added |
| Neuberger Berman Group LLC | 494,925 | $72.0M | 0.05% | −327,789−39.8% | Reduced |
| Marshall Wace, LLP | 536,478 | $78.0M | 0.08% | −91,807−14.6% | Reduced |
| Allspring Global Investments Holdings, LLC | 520,246 | $78.7M | 0.13% | −83,461−13.8% | Reduced |
| Federated Hermes, Inc. | 545,532 | $79.4M | 0.13% | −322−0.1% | Reduced |
| Freestone Grove Partners LP | 575,873 | $83.8M | 0.61% | +575,873 | New |
| Nuveen, LLC | 578,616 | $84.2M | 0.02% | +31,075+5.7% | Added |
| Assenagon Asset Management S.A. | 584,030 | $85.0M | 0.14% | +558,212+2,162.1% | Added |
| Millennium Management LLC | 619,240 | $90.1M | 0.07% | +112,359+22.2% | Added |
| Raymond James Financial Inc | 638,706 | $92.5M | 0.03% | −164,611−20.5% | Reduced |
| BNP Paribas Arbitrage, SA | 651,996 | $94.8M | 0.06% | +259,314+66.0% | Added |
| Loomis Sayles & Co L P | 653,416 | $95.0M | 0.13% | −282,257−30.2% | Reduced |
| Frontier Capital Management Co LLC | 694,422 | $101.0M | 1.04% | −533,031−43.4% | Reduced |
| Artemis Investment Management LLP | 721,505 | $105.0M | 1.11% | +721,505 | New |
| Barrow Hanley Mewhinney & Strauss LLC | 782,466 | $113.8M | 0.37% | −75,434−8.8% | Reduced |
| Prudential Financial Inc | 809,970 | $117.8M | 0.15% | +13,534+1.7% | Added |
| The PNC Financial Services Group, Inc. | 831,736 | $121.0M | 0.07% | +785,885+1,714.0% | Added |
| Vanguard Fiduciary Trust Co | 844,377 | $122.8M | 0.03% | +844,377 | New |
| Balyasny Asset Management LLC | 851,664 | $123.9M | 0.24% | +461,678+118.4% | Added |
| Qube Research & Technologies Ltd | 858,818 | $124.9M | 0.18% | +428,591+99.6% | Added |
| Bank of New York Mellon Corp | 869,184 | $126.4M | 0.02% | −43,690−4.8% | Reduced |
| Fisher Asset Management, LLC | 924,521 | $134.5M | 0.05% | +16,026+1.8% | Added |
| Ameriprise Financial Inc | 998,834 | $145.3M | 0.03% | −245,414−19.7% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 1,032,774 | $150.2M | 0.20% | +24,815+2.5% | Added |
| Bowen Hanes & Co Inc | 1,043,105 | $151.7M | 3.69% | −134,600−11.4% | Reduced |
| American Century Companies Inc | 1,069,282 | $155.5M | 0.08% | −520,735−32.8% | Reduced |
| SG Americas Securities, LLC | 1,075,368 | $156.4M | 0.17% | +1,006,951+1,471.8% | Added |
| Holocene Advisors, LP | 1,097,588 | $159.7M | 0.39% | +25,843+2.4% | Added |
| AQR Capital Management LLC | 1,222,580 | $174.1M | 0.08% | +202,740+19.9% | Added |
| Arrowstreet Capital, Limited Partnership | 1,203,726 | $175.1M | 0.09% | +840,455+231.4% | Added |
| Northern Trust Corp | 1,239,020 | $180.2M | 0.02% | +64,903+5.5% | Added |
| Dendur Capital LP | 1,283,103 | $186.6M | 13.73% | −756,188−37.1% | Reduced |
| Bank of America Corp | 1,364,941 | $198.5M | 0.01% | +565,867+70.8% | Added |
| Dimensional Fund Advisors LP | 1,366,804 | $198.7M | 0.04% | −759,172−35.7% | Reduced |
| UBS Group AG | 1,419,080 | $206.4M | 0.04% | +225,951+18.9% | Added |
| Jane Street Group, LLC | 1,491,263 | $216.9M | 0.23% | +1,214,065+438.0% | Added |
| Charles Schwab Investment Management Inc | 1,502,129 | $218.5M | 0.03% | +14,237+1.0% | Added |
| Morgan Stanley | 1,668,591 | $242.7M | 0.01% | +385,052+30.0% | Added |
| D. E. Shaw & Co., Inc. | 1,742,609 | $253.5M | 0.20% | −280,012−13.8% | Reduced |
| Point72 Asset Management, L.P. | 1,932,579 | $281.1M | 0.49% | +1,172,402+154.2% | Added |
| Geode Capital Management, LLC | 2,947,325 | $428.8M | 0.03% | +528,157+21.8% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 3,332,843 | $484.8M | 1.36% | +3,332,843 | New |
| Invesco Ltd. | 3,855,643 | $560.8M | 0.05% | +470,719+13.9% | Added |
| FMR LLC | 5,247,175 | $763.3M | 0.04% | +172,351+3.4% | Added |
| State Street Corp | 5,381,013 | $782.7M | 0.03% | −218,220−3.9% | Reduced |
| Capital World Investors | 5,712,929 | $831.0M | 0.11% | −1,642,864−22.3% | Reduced |
| Vanguard Portfolio Management LLC | 5,821,508 | $846.8M | 0.04% | +5,821,508 | New |
| Capital International Investors | 5,883,949 | $854.9M | 0.20% | −11,211,854−65.6% | Reduced |
| Vanguard Capital Management LLC | 6,124,128 | $890.8M | 0.02% | +6,124,128 | New |
| Capital Research Global Investors | 6,160,107 | $896.0M | 0.14% | +2,548,383+70.6% | Added |
| BlackRock, Inc. | 16,441,653 | $2.39B | 0.04% | +1,774,883+12.1% | Added |
| MUFG Securities EMEA plc | 0 | $0 | 0.00% | −277,000−100.0% | Sold out |
| Cartenna Capital, LP | 0 | $0 | 0.00% | −260,000−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −175,732−100.0% | Sold out |
| Concentric Capital Strategies, LP | 0 | $0 | 0.00% | −161,956−100.0% | Sold out |
| Weiss Asset Management LP | 0 | $0 | 0.00% | −119,031−100.0% | Sold out |
| J. Goldman & Co LP | 0 | $0 | 0.00% | −114,246−100.0% | Sold out |
| LTS One Management LP | 0 | $0 | 0.00% | −102,500−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −100,869−100.0% | Sold out |
| NEOS Investment Management LLC | 0 | $0 | 0.00% | −78,117−100.0% | Sold out |
| SummitTX Capital, L.P. | 0 | $0 | 0.00% | −68,660−100.0% | Sold out |
| Lansforsakringar Fondforvaltning AB (publ) | 0 | $0 | 0.00% | −63,028−100.0% | Sold out |
| Sagefield Capital LP | 0 | $0 | 0.00% | −51,455−100.0% | Sold out |
| Roubaix Capital, LLC | 0 | $0 | 0.00% | −37,284−100.0% | Sold out |
| Mackenzie Financial Corp | 0 | $0 | 0.00% | −18,849−100.0% | Sold out |
| Toronto Dominion Bank | 0 | $0 | 0.00% | −17,780−100.0% | Sold out |
| Dockside LLC | 0 | $0 | 0.00% | −15,844−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −14,551−100.0% | Sold out |
| Arete Wealth Advisors, LLC | 0 | $0 | 0.00% | −13,236−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −9,545−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −9,519−100.0% | Sold out |
| Redwood Investment Management, LLC | 0 | $0 | 0.00% | −9,495−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −9,362−100.0% | Sold out |