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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 16,441,653 | $2.39B | 0.04% | +1,774,883+12.1% | Added |
| Capital Research Global Investors | 6,160,107 | $896.0M | 0.14% | +2,548,383+70.6% | Added |
| Vanguard Capital Management LLC | 6,124,128 | $890.8M | 0.02% | +6,124,128 | New |
| Capital International Investors | 5,883,949 | $854.9M | 0.20% | −11,211,854−65.6% | Reduced |
| Vanguard Portfolio Management LLC | 5,821,508 | $846.8M | 0.04% | +5,821,508 | New |
| Capital World Investors | 5,712,929 | $831.0M | 0.11% | −1,642,864−22.3% | Reduced |
| State Street Corp | 5,381,013 | $782.7M | 0.03% | −218,220−3.9% | Reduced |
| FMR LLC | 5,247,175 | $763.3M | 0.04% | +172,351+3.4% | Added |
| Invesco Ltd. | 3,855,643 | $560.8M | 0.05% | +470,719+13.9% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 3,332,843 | $484.8M | 1.36% | +3,332,843 | New |
| Geode Capital Management, LLC | 2,947,325 | $428.8M | 0.03% | +528,157+21.8% | Added |
| Point72 Asset Management, L.P. | 1,932,579 | $281.1M | 0.49% | +1,172,402+154.2% | Added |
| D. E. Shaw & Co., Inc. | 1,742,609 | $253.5M | 0.20% | −280,012−13.8% | Reduced |
| Morgan Stanley | 1,668,591 | $242.7M | 0.01% | +385,052+30.0% | Added |
| Charles Schwab Investment Management Inc | 1,502,129 | $218.5M | 0.03% | +14,237+1.0% | Added |
| Jane Street Group, LLC | 1,491,263 | $216.9M | 0.23% | +1,214,065+438.0% | Added |
| UBS Group AG | 1,419,080 | $206.4M | 0.04% | +225,951+18.9% | Added |
| Dimensional Fund Advisors LP | 1,366,804 | $198.7M | 0.04% | −759,172−35.7% | Reduced |
| Bank of America Corp | 1,364,941 | $198.5M | 0.01% | +565,867+70.8% | Added |
| Dendur Capital LP | 1,283,103 | $186.6M | 13.73% | −756,188−37.1% | Reduced |
| Northern Trust Corp | 1,239,020 | $180.2M | 0.02% | +64,903+5.5% | Added |
| Arrowstreet Capital, Limited Partnership | 1,203,726 | $175.1M | 0.09% | +840,455+231.4% | Added |
| AQR Capital Management LLC | 1,222,580 | $174.1M | 0.08% | +202,740+19.9% | Added |
| Holocene Advisors, LP | 1,097,588 | $159.7M | 0.39% | +25,843+2.4% | Added |
| SG Americas Securities, LLC | 1,075,368 | $156.4M | 0.17% | +1,006,951+1,471.8% | Added |
| American Century Companies Inc | 1,069,282 | $155.5M | 0.08% | −520,735−32.8% | Reduced |
| Bowen Hanes & Co Inc | 1,043,105 | $151.7M | 3.69% | −134,600−11.4% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 1,032,774 | $150.2M | 0.20% | +24,815+2.5% | Added |
| Ameriprise Financial Inc | 998,834 | $145.3M | 0.03% | −245,414−19.7% | Reduced |
| Fisher Asset Management, LLC | 924,521 | $134.5M | 0.05% | +16,026+1.8% | Added |
| Bank of New York Mellon Corp | 869,184 | $126.4M | 0.02% | −43,690−4.8% | Reduced |
| Qube Research & Technologies Ltd | 858,818 | $124.9M | 0.18% | +428,591+99.6% | Added |
| Balyasny Asset Management LLC | 851,664 | $123.9M | 0.24% | +461,678+118.4% | Added |
| Vanguard Fiduciary Trust Co | 844,377 | $122.8M | 0.03% | +844,377 | New |
| The PNC Financial Services Group, Inc. | 831,736 | $121.0M | 0.07% | +785,885+1,714.0% | Added |
| Prudential Financial Inc | 809,970 | $117.8M | 0.15% | +13,534+1.7% | Added |
| Barrow Hanley Mewhinney & Strauss LLC | 782,466 | $113.8M | 0.37% | −75,434−8.8% | Reduced |
| Artemis Investment Management LLP | 721,505 | $105.0M | 1.11% | +721,505 | New |
| Frontier Capital Management Co LLC | 694,422 | $101.0M | 1.04% | −533,031−43.4% | Reduced |
| Loomis Sayles & Co L P | 653,416 | $95.0M | 0.13% | −282,257−30.2% | Reduced |
| BNP Paribas Arbitrage, SA | 651,996 | $94.8M | 0.06% | +259,314+66.0% | Added |
| Raymond James Financial Inc | 638,706 | $92.5M | 0.03% | −164,611−20.5% | Reduced |
| Millennium Management LLC | 619,240 | $90.1M | 0.07% | +112,359+22.2% | Added |
| Assenagon Asset Management S.A. | 584,030 | $85.0M | 0.14% | +558,212+2,162.1% | Added |
| Nuveen, LLC | 578,616 | $84.2M | 0.02% | +31,075+5.7% | Added |
| Freestone Grove Partners LP | 575,873 | $83.8M | 0.61% | +575,873 | New |
| Federated Hermes, Inc. | 545,532 | $79.4M | 0.13% | −322−0.1% | Reduced |
| Allspring Global Investments Holdings, LLC | 520,246 | $78.7M | 0.13% | −83,461−13.8% | Reduced |
| Marshall Wace, LLP | 536,478 | $78.0M | 0.08% | −91,807−14.6% | Reduced |
| Neuberger Berman Group LLC | 494,925 | $72.0M | 0.05% | −327,789−39.8% | Reduced |
| Bank of Nova Scotia | 467,149 | $68.0M | 0.12% | +224,949+92.9% | Added |
| Alliancebernstein L.P. | 575,528 | $66.0M | 0.02% | +269,011+87.8% | Added |
| Goldman Sachs Group Inc | 447,819 | $65.1M | 0.01% | +85,432+23.6% | Added |
| Vaughan Nelson Investment Management, L.P. | 382,375 | $55.6M | 0.56% | +4,825+1.3% | Added |
| JPMorgan Chase & Co | 407,423 | $55.2M | 0.00% | +52,542+14.8% | Added |
| ING Groep NV | 377,500 | $54.9M | 0.34% | +182,200+93.3% | Added |
| Schroder Investment Management Group | 402,593 | $54.6M | 0.04% | −50,952−11.2% | Reduced |
| Square Wave Capital, LLC | 366,400 | $53.3M | 12.89% | +366,400 | New |
| Gamco Investors, Inc. Et Al | 361,500 | $52.6M | 0.52% | −21,600−5.6% | Reduced |
| UBS Asset Management Americas Inc | 354,737 | $51.6M | 0.01% | +2,421+0.7% | Added |
| Rhumbline Advisers | 354,371 | $51.5M | 0.04% | +6,823+2.0% | Added |
| Wells Fargo & Company | 351,142 | $51.1M | 0.01% | +133,389+61.3% | Added |
| Jupiter Asset Management Ltd | 341,677 | $49.7M | 0.27% | +216,538+173.0% | Added |
| Price T Rowe Associates Inc | 328,732 | $47.8M | 0.01% | −169,445−34.0% | Reduced |
| Retirement Systems of Alabama | 312,287 | $45.4M | 0.15% | +3,504+1.1% | Added |
| Citadel Advisors LLC | 303,296 | $44.1M | 0.03% | +200,594+195.3% | Added |
| Principal Financial Group Inc | 303,158 | $44.1M | 0.02% | +11,014+3.8% | Added |
| Segall Bryant & Hamill, LLC | 277,371 | $40.3M | 0.58% | −44,322−13.8% | Reduced |
| Swiss National Bank | 268,800 | $39.1M | 0.02% | −2,900−1.1% | Reduced |
| Allianz Asset Management GmbH | 267,834 | $39.0M | 0.04% | +25,323+10.4% | Added |
| Jain Global LLC | 264,476 | $38.5M | 0.49% | −400,800−60.2% | Reduced |
| KLCM Advisors, Inc. | 262,839 | $38.2M | 3.33% | −59,825−18.5% | Reduced |
| Amundi | 261,186 | $38.0M | 0.01% | +231,336+775.0% | Added |
| Gotham Asset Management, LLC | 260,488 | $37.9M | 0.12% | −30,508−10.5% | Reduced |
| California Public Employees Retirement System | 253,797 | $36.9M | 0.02% | −892−0.4% | Reduced |
| HRT Financial LP | 252,898 | $36.8M | 0.09% | +188,807+294.6% | Added |
| Blair William & Co | 236,996 | $34.5M | 0.10% | +192,894+437.4% | Added |
| Capital International Inc | 234,928 | $34.2M | 0.26% | −91,126−27.9% | Reduced |
| Envestnet Asset Management Inc | 215,778 | $31.4M | 0.01% | +152,461+240.8% | Added |
| Driehaus Capital Management LLC | 212,734 | $30.9M | 0.23% | −377−0.2% | Reduced |
| Legal & General Group Plc | 211,998 | $30.8M | 0.01% | −12,791−5.7% | Reduced |
| State of Wisconsin Investment Board | 201,963 | $29.4M | 0.07% | −26,812−11.7% | Reduced |
| Hawk Ridge Capital Management LP | 185,600 | $27.0M | 0.98% | −23,900−11.4% | Reduced |
| Aventail Capital Group, LP | 185,312 | $27.0M | 1.30% | +185,312 | New |
| Lord, Abbett & Co. LLC | 182,049 | $26.5M | 0.09% | −85,000−31.8% | Reduced |
| Emerald Advisers, LLC | 181,485 | $26.4M | 0.84% | −126,067−41.0% | Reduced |
| Royal Bank of Canada | 171,029 | $24.9M | 0.00% | +94,793+124.3% | Added |
| Canada Pension Plan Investment Board | 167,726 | $24.4M | 0.02% | −77,800−31.7% | Reduced |
| LPL Financial LLC | 165,570 | $24.1M | 0.01% | +98,944+148.5% | Added |
| Panagora Asset Management Inc | 165,531 | $24.1M | 0.09% | +140,095+550.8% | Added |
| California State Teachers Retirement System | 157,761 | $22.9M | 0.02% | +27,339+21.0% | Added |
| 1832 Asset Management L.P. | 151,514 | $22.0M | 0.03% | −142,959−48.5% | Reduced |
| Walleye Capital LLC | 146,109 | $21.3M | 0.13% | +43,811+42.8% | Added |
| Senator Investment Group LP | 145,000 | $21.1M | 0.97% | −180,000−55.4% | Reduced |
| New York State Teachers Retirement System | 134,642 | $19.6M | 0.04% | −13,327−9.0% | Reduced |
| Natixis Advisors, L.P. | 124,277 | $18.1M | 0.03% | −26,988−17.8% | Reduced |
| Nomura Asset Management International Inc. | 117,121 | $17.0M | 0.03% | −122,488−51.1% | Reduced |
| Sanctuary Advisors, LLC | 115,616 | $16.8M | 0.09% | −19,649−14.5% | Reduced |
| Russell Investments Group, Ltd. | 109,249 | $15.9M | 0.02% | +79,230+263.9% | Added |
| Deutsche Bank AG | 107,889 | $15.7M | 0.01% | −3,237−2.9% | Reduced |