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 |
|---|---|---|---|---|---|
| Algert Global LLC | 107,254 | $15.6M | 0.23% | −20,691−16.2% | Reduced |
| CIBC Bancorp USA Inc. | 106,915 | $15.6M | 0.02% | +106,915 | New |
| Vanguard Asset Management, Ltd | 104,824 | $15.2M | 0.01% | +104,824 | New |
| Guggenheim Capital LLC | 104,361 | $15.2M | 0.12% | +17,956+20.8% | Added |
| Toroso Investments, LLC | 103,666 | $15.1M | 0.05% | +84,639+444.8% | Added |
| FACT Capital, LP | 103,102 | $15.0M | 9.97% | 00.0% | Unchanged |
| Advisors Asset Management, Inc. | 102,505 | $14.9M | 0.25% | +5,184+5.3% | Added |
| Signature Estate & Investment Advisors LLC | 99,952 | $14.5M | 0.29% | −44,377−30.7% | Reduced |
| Barclays PLC | 99,328 | $14.4M | 0.01% | −40,216−28.8% | Reduced |
| Voleon Capital Management LP | 98,923 | $14.4M | 0.31% | +95,594+2,871.6% | Added |
| State Board of Administration of Florida Retirement System | 98,530 | $14.3M | 0.03% | −1,670−1.7% | Reduced |
| Royce & Associates LP | 98,112 | $14.3M | 0.14% | −33,420−25.4% | Reduced |
| Emerald Mutual Fund Advisers Trust | 93,847 | $13.7M | 0.66% | −89,708−48.9% | Reduced |
| First Trust Advisors LP | 93,147 | $13.5M | 0.01% | +11,883+14.6% | Added |
| Stifel Financial Corp | 92,619 | $13.5M | 0.01% | −5,011−5.1% | Reduced |
| Mountaineer Partners Management, LLC | 91,784 | $13.4M | 6.63% | −37,125−28.8% | Reduced |
| Tran Capital Management, L.P. | 90,862 | $13.2M | 1.81% | −261,460−74.2% | Reduced |
| SEI Investments Co | 90,045 | $13.1M | 0.01% | −29,540−24.7% | Reduced |
| Woodline Partners LP | 89,389 | $13.0M | 0.05% | −381,806−81.0% | Reduced |
| Tudor Investment Corp Et Al | 88,935 | $12.9M | 0.07% | +88,935 | New |
| ExodusPoint Capital Management, LP | 88,212 | $12.8M | 0.13% | +70,578+400.2% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 87,042 | $12.7M | 0.02% | +33,580+62.8% | Added |
| Epoch Investment Partners, Inc. | 85,601 | $12.5M | 0.08% | −4,698−5.2% | Reduced |
| Susquehanna Fundamental Investments, LLC | 82,786 | $12.0M | 0.45% | 00.0% | Unchanged |
| Tema ETFs LLC | 81,261 | $11.8M | 0.79% | +3,144+4.0% | Added |
| Rokos Capital Management LLP | 80,343 | $11.7M | 0.21% | +80,343 | New |
| Northwestern Mutual Wealth Management Co | 79,308 | $11.5M | 0.01% | +51,772+188.0% | Added |
| Great West Life Assurance Co | 78,513 | $11.4M | 0.02% | −963−1.2% | Reduced |
| Channing Capital Management, LLC | 77,998 | $11.3M | 0.29% | −27,321−25.9% | Reduced |
| Wellington Management Group LLP | 75,745 | $11.0M | 0.00% | −301,613−79.9% | Reduced |
| Citigroup Inc | 75,616 | $11.0M | 0.01% | −18,317−19.5% | Reduced |
| Anomaly Capital Management, LP | 74,830 | $10.9M | 0.66% | +74,830 | New |
| Mariner, LLC | 72,487 | $10.5M | 0.01% | +18,396+34.0% | Added |
| Mengis Capital Management, Inc. | 70,652 | $10.3M | 1.77% | −2,615−3.6% | Reduced |
| Manufacturers Life Insurance Company, The | 69,568 | $10.1M | 0.01% | −24,167−25.8% | Reduced |
| Globeflex Capital L P | 69,161 | $10.1M | 1.52% | −2,920−4.1% | Reduced |
| Engineers Gate Manager LP | 68,945 | $10.0M | 0.13% | +31,519+84.2% | Added |
| MetLife Investment Management | 66,816 | $9.72M | 0.05% | +447+0.7% | Added |
| Credit Agricole S A | 66,022 | $9.60M | 0.03% | +27,000+69.2% | Added |
| New York State Common Retirement Fund | 63,437 | $9.23M | 0.01% | −1,500−2.3% | Reduced |
| Brevan Howard Capital Management LP | 62,710 | $9.12M | 0.09% | +54,307+646.3% | Added |
| Amalgamated Bank | 62,536 | $9.10M | 0.07% | +1,182+1.9% | Added |
| XTX Topco Ltd | 61,247 | $8.91M | 0.15% | +58,210+1,916.7% | Added |
| Janus Henderson Group PLC | 60,508 | $8.80M | 0.00% | 00.0% | Unchanged |
| Man Group plc | 59,535 | $8.66M | 0.02% | −72,126−54.8% | Reduced |
| Intech Investment Management LLC | 59,394 | $8.64M | 0.08% | +54,356+1,078.9% | Added |
| Worldquant Millennium Advisors LLC | 58,010 | $8.44M | 0.03% | −34,157−37.1% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 57,678 | $8.39M | 0.07% | +319+0.6% | Added |
| Treasurer of the State of North Carolina | 57,670 | $8.39M | 0.03% | +1,227+2.2% | Added |
| State of Tennessee, Treasury Department | 56,903 | $8.28M | 0.03% | −3,612−6.0% | Reduced |
| Empowered Funds, LLC | 55,970 | $8.14M | 0.05% | +42,136+304.6% | Added |
| Vanguard Global Advisers, LLC | 55,668 | $8.10M | 0.00% | +55,668 | New |
| S Squared Technology, LLC | 55,000 | $8.00M | 3.03% | −25,000−31.3% | Reduced |
| Soros Fund Management LLCSuperinvestorSoros Fund Management | 52,832 | $7.68M | 0.11% | +52,832 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 52,264 | $7.60M | 0.02% | +8,352+19.0% | Added |
| Mutual of America Capital Management LLC | 52,066 | $7.57M | 0.09% | −4,477−7.9% | Reduced |
| Ieq Capital, LLC | 51,684 | $7.52M | 0.03% | −13,533−20.8% | Reduced |
| Thrivent Financial for Lutherans | 50,399 | $7.33M | 0.01% | +3,112+6.6% | Added |
| Teachers Retirement System of the State of Kentucky | 50,246 | $7.31M | 0.06% | −12,446−19.9% | Reduced |
| Nordea Investment Management AB | 50,456 | $7.17M | 0.01% | −2,244−4.3% | Reduced |
| Fifth Third Bancorp | 48,899 | $7.11M | 0.01% | +47,543+3,506.1% | Added |
| Jones Financial Companies LLLP | 49,713 | $6.98M | 0.00% | +34,094+218.3% | Added |
| Voya Investment Management LLC | 47,251 | $6.87M | 0.01% | +5,677+13.7% | Added |
| State of New Jersey Common Pension Fund D | 46,864 | $6.82M | 0.03% | 00.0% | Unchanged |
| Warren Averett Asset Management, LLC | 46,082 | $6.70M | 0.05% | −13,761−23.0% | Reduced |
| TD Asset Management Inc | 45,569 | $6.63M | 0.01% | −2,212−4.6% | Reduced |
| Capital Group Private Client Services, Inc. | 44,349 | $6.45M | 0.11% | −19,018−30.0% | Reduced |
| RPg Family Wealth Advisory, LLC | 44,103 | $6.42M | 1.34% | +44,103 | New |
| Horizon Investments, LLC | 43,214 | $6.29M | 0.07% | −12,300−22.2% | Reduced |
| Pathstone Holdings, LLC | 43,146 | $6.28M | 0.02% | −2,205−4.9% | Reduced |
| Qsemble Capital Management, LP | 42,008 | $6.11M | 0.47% | +33,921+419.5% | Added |
| 1492 Capital Management LLC | 41,865 | $6.09M | 2.32% | −427−1.0% | Reduced |
| Asset Management One Co.,Ltd. | 42,215 | $6.09M | 0.02% | −185−0.4% | Reduced |
| Cerity Partners LLC | 41,648 | $6.06M | 0.01% | +7,665+22.6% | Added |
| Quadrature Capital Ltd | 41,620 | $6.05M | 0.07% | +41,620 | New |
| Yousif Capital Management, LLC | 40,476 | $5.89M | 0.07% | −2,040−4.8% | Reduced |
| Quantinno Capital Management LP | 40,458 | $5.89M | 0.01% | +7,495+22.7% | Added |
| Aquatic Capital Management LLC | 40,380 | $5.87M | 0.17% | +40,380 | New |
| Covea Finance | 40,200 | $5.85M | 0.20% | −9,200−18.6% | Reduced |
| Public Employees Retirement System of Ohio | 39,930 | $5.81M | 0.02% | −1,453−3.5% | Reduced |
| Creative Planning | 39,641 | $5.77M | 0.00% | +7,177+22.1% | Added |
| Louisiana State Employees Retirement System | 39,400 | $5.73M | 0.10% | +1,800+4.8% | Added |
| Nisa Investment Advisors, LLC | 39,221 | $5.71M | 0.02% | +27,119+224.1% | Added |
| Verition Fund Management LLC | 39,142 | $5.69M | 0.06% | +36,825+1,589.3% | Added |
| Arizona State Retirement System | 37,324 | $5.43M | 0.03% | −1,092−2.8% | Reduced |
| Rafferty Asset Management, LLC | 36,482 | $5.31M | 0.02% | +2,965+8.8% | Added |
| CWM, LLC | 36,466 | $5.30M | 0.01% | +9,154+33.5% | Added |
| H Squared Management LP | 36,200 | $5.27M | 4.85% | +22,400+162.3% | Added |
| Susquehanna International Group, LLP | 35,349 | $5.14M | 0.01% | +29,212+476.0% | Added |
| Buckingham Strategic Partners | 35,211 | $5.12M | 0.05% | −985−2.7% | Reduced |
| Occudo Quantitative Strategies LP | 32,798 | $5.10M | 0.28% | +32,798 | New |
| Farmers & Merchants Investments Inc | 34,723 | $5.05M | 0.14% | −7,388−17.5% | Reduced |
| Vanguard Investments Australia, Ltd. | 34,056 | $4.95M | 0.01% | +34,056 | New |
| HighTower Advisors, LLC | 34,055 | $4.95M | 0.01% | +6,333+22.8% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 34,041 | $4.95M | 0.03% | +42+0.1% | Added |
| Moore Capital Management, LP | 33,916 | $4.93M | 0.18% | +33,916 | New |
| Spire Wealth Management | 33,596 | $4.89M | 0.17% | +33,596 | New |
| Janney Montgomery Scott LLC | 33,437 | $4.86M | 0.01% | −5,577−14.3% | Reduced |
| New Age Alpha Advisors, LLC | 33,291 | $4.84M | 0.23% | −759−2.2% | Reduced |
| Virtu Financial LLC | 33,021 | $4.80M | 0.20% | +30,267+1,099.0% | Added |