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, Q4 2025
Institutional positions in Ati Inc as of Dec 31, 2025. 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
- 570
- +109 vs. Q3 2025
- Shares held
- 128.3M
- −445.7K (−0.3%) vs. Q3 2025
- Total value
- $14.7B
- +$4.26B (+40.7%) vs. Q3 2025
- New holders
- 145
- 169 more added
- Sold out
- 36
- 181 more reduced
9 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Ati Inc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Credit Agricole S A | 39,022 | $4.48M | 0.01% | +13,963+55.7% | Added |
| Pier 88 Investment Partners LLC | 40,912 | $4.70M | 1.05% | +33,910+484.3% | Added |
| Public Employees Retirement System of Ohio | 41,383 | $4.75M | 0.01% | −3,169−7.1% | Reduced |
| Voya Investment Management LLC | 41,574 | $4.77M | 0.00% | +1,991+5.0% | Added |
| Farmers & Merchants Investments Inc | 42,111 | $4.83M | 0.13% | −2,196−5.0% | Reduced |
| 1492 Capital Management LLC | 42,292 | $4.85M | 1.86% | +1,982+4.9% | Added |
| Asset Management One Co.,Ltd. | 42,400 | $4.94M | 0.01% | −2,784−6.2% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 43,912 | $5.04M | 0.01% | −21,949−33.3% | Reduced |
| Blair William & Co | 44,102 | $5.06M | 0.01% | +40,415+1,096.1% | Added |
| Pathstone Holdings, LLC | 45,351 | $5.20M | 0.02% | −2,733−5.7% | Reduced |
| Yousif Capital Management, LLC | 42,516 | $5.24M | 0.06% | −1,319−3.0% | Reduced |
| The PNC Financial Services Group, Inc. | 45,851 | $5.26M | 0.00% | −164−0.4% | Reduced |
| State of New Jersey Common Pension Fund D | 46,864 | $5.38M | 0.02% | −2,598−5.3% | Reduced |
| Thrivent Financial for Lutherans | 47,287 | $5.43M | 0.01% | +1,165+2.5% | Added |
| TD Asset Management Inc | 47,781 | $5.48M | 0.00% | +31,244+188.9% | Added |
| Covea Finance | 49,400 | $5.67M | 0.19% | −5,900−10.7% | Reduced |
| Sagefield Capital LP | 51,455 | $5.90M | 0.50% | −18,102−26.0% | Reduced |
| Nordea Investment Management AB | 52,700 | $6.11M | 0.01% | +52,700 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 53,462 | $6.14M | 0.01% | +16,900+46.2% | Added |
| Mariner, LLC | 54,091 | $6.21M | 0.01% | +47,549+726.8% | Added |
| Horizon Investments, LLC | 55,514 | $6.37M | 0.08% | +55,514 | New |
| Treasurer of the State of North Carolina | 56,443 | $6.48M | 0.02% | −6,436−10.2% | Reduced |
| Mutual of America Capital Management LLC | 56,543 | $6.49M | 0.07% | −7,112−11.2% | Reduced |
| Tribune Investment Group LP | 57,000 | $6.54M | 3.98% | +57,000 | New |
| Police & Firemen's Retirement System of New Jersey | 57,359 | $6.58M | 0.05% | −4,411−7.1% | Reduced |
| Warren Averett Asset Management, LLC | 59,843 | $6.87M | 0.06% | +709+1.2% | Added |
| Janus Henderson Group PLC | 60,508 | $6.95M | 0.00% | +154+0.3% | Added |
| Amalgamated Bank | 61,354 | $7.04M | 0.05% | −1,666−2.6% | Reduced |
| Capital Fund Management S.A. | 62,675 | $7.19M | 0.07% | +52,099+492.6% | Added |
| Teachers Retirement System of the State of Kentucky | 62,692 | $7.20M | 0.05% | −8,525−12.0% | Reduced |
| Lansforsakringar Fondforvaltning AB (publ) | 63,028 | $7.23M | 0.04% | −5,217−7.6% | Reduced |
| Envestnet Asset Management Inc | 63,317 | $7.27M | 0.00% | +7,765+14.0% | Added |
| Capital Group Private Client Services, Inc. | 63,367 | $7.27M | 0.12% | −13,483−17.5% | Reduced |
| Candelo Capital Management LP | 63,396 | $7.28M | 6.64% | +2,500+4.1% | Added |
| State of Tennessee, Treasury Department | 60,515 | $7.28M | 0.02% | −2,592−4.1% | Reduced |
| HRT Financial LP | 64,091 | $7.36M | 0.02% | +54,760+586.9% | Added |
| New York State Common Retirement Fund | 64,937 | $7.45M | 0.01% | −224,579−77.6% | Reduced |
| Ieq Capital, LLC | 65,217 | $7.48M | 0.02% | +65,217 | New |
| MetLife Investment Management | 66,369 | $7.62M | 0.04% | −4,507−6.4% | Reduced |
| LPL Financial LLC | 66,626 | $7.65M | 0.00% | −10,148−13.2% | Reduced |
| SG Americas Securities, LLC | 68,417 | $7.85M | 0.01% | +62,529+1,062.0% | Added |
| SummitTX Capital, L.P. | 68,660 | $7.88M | 0.24% | +68,660 | New |
| Globeflex Capital L P | 72,081 | $8.27M | 1.27% | 00.0% | Unchanged |
| Comerica Bank | 72,427 | $8.31M | 0.03% | +17,210+31.2% | Added |
| Mengis Capital Management, Inc. | 73,267 | $8.41M | 1.49% | −8,540−10.4% | Reduced |
| Royal Bank of Canada | 76,236 | $8.75M | 0.00% | −1,208,450−94.1% | Reduced |
| NEOS Investment Management LLC | 78,117 | $8.96M | 0.05% | +2,101+2.8% | Added |
| Tema ETFs LLC | 78,117 | $8.96M | 0.70% | +2,101+2.8% | Added |
| Great West Life Assurance Co | 79,476 | $9.12M | 0.02% | −26,078−24.7% | Reduced |
| S Squared Technology, LLC | 80,000 | $9.18M | 3.56% | +80,000 | New |
| First Trust Advisors LP | 81,264 | $9.33M | 0.01% | −2,763−3.3% | Reduced |
| Susquehanna Fundamental Investments, LLC | 82,786 | $9.50M | 0.32% | +10,075+13.9% | Added |
| Guggenheim Capital LLC | 86,405 | $9.92M | 0.07% | −3,343−3.7% | Reduced |
| Epoch Investment Partners, Inc. | 90,299 | $10.4M | 0.06% | +51,419+132.3% | Added |
| HSBC Holdings PLC | 90,781 | $10.5M | 0.01% | +63,518+233.0% | Added |
| Hudson Bay Capital Management LP | 91,896 | $10.5M | 0.06% | −62,888−40.6% | Reduced |
| Worldquant Millennium Advisors LLC | 92,167 | $10.6M | 0.04% | +92,167 | New |
| Manufacturers Life Insurance Company, The | 93,735 | $10.8M | 0.01% | −5,443−5.5% | Reduced |
| Citigroup Inc | 93,933 | $10.8M | 0.01% | +2,329+2.5% | Added |
| Advisors Asset Management, Inc. | 97,321 | $11.2M | 0.19% | +5,462+5.9% | Added |
| Stifel Financial Corp | 97,630 | $11.2M | 0.01% | +8,174+9.1% | Added |
| State Board of Administration of Florida Retirement System | 100,200 | $11.5M | 0.02% | +5,605+5.9% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 100,869 | $11.6M | 0.03% | −15,440−13.3% | Reduced |
| Walleye Capital LLC | 102,298 | $11.7M | 0.07% | +101,761+18,949.9% | Added |
| LTS One Management LP | 102,500 | $11.8M | 4.54% | −107,500−51.2% | Reduced |
| Citadel Advisors LLC | 102,702 | $11.8M | 0.01% | −10,201−9.0% | Reduced |
| FACT Capital, LP | 103,102 | $11.8M | 6.62% | +1,702+1.7% | Added |
| Channing Capital Management, LLC | 105,319 | $12.1M | 0.31% | −1,003,841−90.5% | Reduced |
| Schonfeld Strategic Advisors LLC | 107,131 | $12.3M | 0.06% | +107,131 | New |
| Deutsche Bank AG | 111,126 | $12.8M | 0.00% | −3,051−2.7% | Reduced |
| J. Goldman & Co LP | 114,246 | $13.1M | 0.51% | −33,215−22.5% | Reduced |
| Weiss Asset Management LP | 119,031 | $13.7M | 0.19% | +108,790+1,062.3% | Added |
| SEI Investments Co | 119,585 | $13.7M | 0.01% | +2,088+1.8% | Added |
| Jupiter Asset Management Ltd | 125,139 | $14.4M | 0.11% | −12,749−9.2% | Reduced |
| Algert Global LLC | 127,945 | $14.7M | 0.23% | +20,045+18.6% | Added |
| Mountaineer Partners Management, LLC | 128,909 | $14.8M | 8.28% | −15,111−10.5% | Reduced |
| California State Teachers Retirement System | 130,422 | $15.0M | 0.01% | −3,672−2.7% | Reduced |
| Royce & Associates LP | 131,532 | $15.1M | 0.15% | −5,930−4.3% | Reduced |
| Man Group plc | 131,661 | $15.1M | 0.03% | +103,140+361.6% | Added |
| Sanctuary Advisors, LLC | 135,265 | $15.5M | 0.08% | +53,629+65.7% | Added |
| Barclays PLC | 139,544 | $16.0M | 0.01% | −180,147−56.4% | Reduced |
| Signature Estate & Investment Advisors LLC | 144,329 | $16.6M | 0.33% | +618+0.4% | Added |
| New York State Teachers Retirement System | 147,969 | $17.0M | 0.03% | −2,032−1.4% | Reduced |
| Natixis Advisors, L.P. | 151,265 | $17.4M | 0.02% | +75,342+99.2% | Added |
| Concentric Capital Strategies, LP | 161,956 | $18.6M | 0.96% | +161,956 | New |
| Voloridge Investment Management, LLC | 175,732 | $20.2M | 0.07% | −404,735−69.7% | Reduced |
| CIBC World Markets Corp | 177,444 | $20.4M | 0.10% | +177,444 | New |
| CI Private Wealth, LLC | 176,486 | $20.5M | 0.03% | −175,622−49.9% | Reduced |
| Emerald Mutual Fund Advisers Trust | 183,555 | $21.1M | 1.03% | 00.0% | Unchanged |
| ING Groep NV | 195,300 | $22.4M | 0.14% | −98,213−33.5% | Reduced |
| Hawk Ridge Capital Management LP | 209,500 | $24.0M | 1.11% | −65,100−23.7% | Reduced |
| Driehaus Capital Management LLC | 213,111 | $24.5M | 0.17% | +213,111 | New |
| Wells Fargo & Company | 217,753 | $25.0M | 0.00% | −2,354−1.1% | Reduced |
| Legal & General Group Plc | 224,789 | $25.8M | 0.01% | −15,138−6.3% | Reduced |
| State of Wisconsin Investment Board | 228,775 | $26.3M | 0.06% | −33,636−12.8% | Reduced |
| Nomura Asset Management International Inc. | 239,609 | $27.5M | 0.04% | +239,609 | New |
| Bank of Nova Scotia | 242,200 | $27.8M | 0.04% | −22,853−8.6% | Reduced |
| Allianz Asset Management GmbH | 242,511 | $27.8M | 0.03% | +133,047+121.5% | Added |
| Canada Pension Plan Investment Board | 245,526 | $28.2M | 0.02% | +8,900+3.8% | Added |
| California Public Employees Retirement System | 254,689 | $29.2M | 0.02% | −2,986−1.2% | Reduced |