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 |
|---|---|---|---|---|---|
| Allstate Corp | 14,951 | $2.17M | 0.02% | +14,951 | New |
| Twin Tree Management, LP | 14,980 | $2.18M | 0.46% | +14,980 | New |
| Gabelli Funds LLC | 15,316 | $2.23M | 0.02% | +1,620+11.8% | Added |
| NVWM, LLC | 15,713 | $2.29M | 0.51% | −172−1.1% | Reduced |
| Bragg Financial Advisors, Inc | 15,985 | $2.33M | 0.07% | 00.0% | Unchanged |
| Virginia Retirement Systems Et Al | 16,028 | $2.33M | 0.02% | +5,800+56.7% | Added |
| Havemeyer Place LP | 16,058 | $2.34M | 0.27% | +2,426+17.8% | Added |
| Quadrant Capital Group LLC | 16,122 | $2.35M | 0.07% | +349+2.2% | Added |
| RMB Capital Management, LLC | 16,125 | $2.35M | 0.04% | +18+0.1% | Added |
| Franklin Resources Inc | 16,139 | $2.35M | 0.00% | +11,115+221.2% | Added |
| Donoghue Forlines LLC | 16,225 | $2.36M | 0.65% | +16,225 | New |
| JustInvest LLC | 16,515 | $2.40M | 0.02% | +349+2.2% | Added |
| Knights of Columbus Asset Advisors LLC | 16,635 | $2.42M | 0.14% | +1,839+12.4% | Added |
| Thoroughbred Financial Services, LLC | 16,639 | $2.42M | 0.14% | +2,686+19.3% | Added |
| CWM Advisors, LLC | 17,046 | $2.48M | 0.14% | +5,484+47.4% | Added |
| Sciencast Management LP | 17,329 | $2.52M | 0.32% | +8,685+100.5% | Added |
| Xponance, Inc. | 17,371 | $2.53M | 0.02% | +3,951+29.4% | Added |
| Marathon Partners Equity Management, LLC | 17,500 | $2.55M | 2.90% | −2,500−12.5% | Reduced |
| Advisory Services Network, LLC | 17,698 | $2.57M | 0.03% | +757+4.5% | Added |
| Two Sigma Investments, LP | 17,775 | $2.59M | 0.00% | +15,808+803.7% | Added |
| Bridgeway Capital Management, LLC | 17,900 | $2.60M | 0.05% | +17,900 | New |
| Pier 88 Investment Partners LLC | 18,000 | $2.62M | 0.67% | −22,912−56.0% | Reduced |
| Paradigm Capital Management Inc | 18,000 | $2.62M | 0.10% | 00.0% | Unchanged |
| Natixis | 18,302 | $2.66M | 0.01% | −245,765−93.1% | Reduced |
| Entropy Technologies, LP | 19,026 | $2.77M | 0.13% | +19,026 | New |
| Park Avenue Securities LLC | 19,049 | $2.77M | 0.02% | +19,049 | New |
| Legacy Capital Wealth Management, LLC | 19,271 | $2.80M | 1.64% | +19,271 | New |
| Steward Partners Investment Advisory, LLC | 19,841 | $2.89M | 0.01% | +15,050+314.1% | Added |
| Graphene Investments SAS | 19,900 | $2.89M | 1.94% | −8,500−29.9% | Reduced |
| Federation des caisses Desjardins du Quebec | 19,929 | $2.90M | 0.01% | +9,070+83.5% | Added |
| DnB Asset Management AS | 20,789 | $3.02M | 0.01% | +18,827+959.6% | Added |
| Ensign Peak Advisors, Inc | 20,815 | $3.03M | 0.01% | +5,250+33.7% | Added |
| Hantz Financial Services, Inc. | 20,990 | $3.05M | 0.05% | +949+4.7% | Added |
| Teacher Retirement System of Texas | 21,555 | $3.14M | 0.01% | +1,341+6.6% | Added |
| Quantbot Technologies LP | 21,632 | $3.15M | 0.13% | −16,042−42.6% | Reduced |
| Pacer Advisors, Inc. | 21,679 | $3.15M | 0.01% | +5,532+34.3% | Added |
| Axq Capital, LP | 21,692 | $3.16M | 0.41% | +21,692 | New |
| Bridgewater Associates, LP | 21,950 | $3.19M | 0.01% | +21,950 | New |
| Pictet Asset Management Holding SA | 22,141 | $3.22M | 0.00% | +1,389+6.7% | Added |
| Huntington National Bank | 22,699 | $3.30M | 0.02% | −446−1.9% | Reduced |
| Squarepoint Ops LLC | 22,841 | $3.32M | 0.01% | +15,664+218.3% | Added |
| OP Asset Management Ltd | 22,985 | $3.34M | 0.03% | +2,586+12.7% | Added |
| Dymon Asia Capital (Singapore) Pte. Ltd. | 23,120 | $3.36M | 0.74% | −5,280−18.6% | Reduced |
| Schonfeld Strategic Advisors LLC | 23,543 | $3.42M | 0.03% | −83,588−78.0% | Reduced |
| Bank of Montreal | 23,837 | $3.47M | 0.00% | −2,250−8.6% | Reduced |
| Mivtachim The Workers Social Insurance Fund Ltd. (Under Special Management) | 24,000 | $3.49M | 0.44% | +24,000 | New |
| Erste Asset Management GmbH | 25,780 | $3.49M | 0.03% | 00.0% | Unchanged |
| Lazard Asset Management LLC | 24,105 | $3.51M | 0.01% | +17,785+281.4% | Added |
| Capstone Investment Advisors, LLC | 25,019 | $3.64M | 0.03% | +18,615+290.7% | Added |
| MML Investors Services, LLC | 25,348 | $3.69M | 0.01% | +18,159+252.6% | Added |
| Capital Fund Management S.A. | 25,759 | $3.75M | 0.03% | −36,916−58.9% | Reduced |
| Expect Equity LLC | 25,945 | $3.77M | 2.94% | −2,465−8.7% | Reduced |
| Wiley Bros.-Aintree Capital, LLC | 25,857 | $3.80M | 0.02% | +9,750+60.5% | Added |
| Susquehanna Portfolio Strategies, LLC | 26,133 | $3.80M | 0.06% | 00.0% | Unchanged |
| Nilsine Partners, LLC | 25,025 | $3.84M | 0.30% | +13,093+109.7% | Added |
| Cetera Investment Advisers | 26,675 | $3.88M | 0.00% | +11,492+75.7% | Added |
| Freemont Management S.A. | 27,300 | $3.97M | 0.74% | +7,400+37.2% | Added |
| Hudson Bay Capital Management LP | 27,397 | $3.99M | 0.02% | −64,499−70.2% | Reduced |
| Oregon Public Employees Retirement Fund | 27,835 | $4.05M | 0.05% | +742+2.7% | Added |
| Candelo Capital Management LP | 28,146 | $4.09M | 4.12% | −35,250−55.6% | Reduced |
| Pinebridge Investments LLC | 28,258 | $4.11M | 0.03% | +28,258 | New |
| HSBC Holdings PLC | 28,788 | $4.16M | 0.00% | −61,993−68.3% | Reduced |
| Pier Capital, LLC | 28,721 | $4.18M | 0.69% | −331−1.1% | Reduced |
| New Mexico Educational Retirement Board | 28,800 | $4.19M | 0.13% | 00.0% | Unchanged |
| Cookson Peirce & Co Inc | 28,949 | $4.21M | 0.18% | −6,524−18.4% | Reduced |
| Envestnet Portfolio Solutions, Inc. | 28,970 | $4.21M | 0.02% | −8,808−23.3% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 31,790 | $4.30M | 0.01% | +6,142+23.9% | Added |
| Register Financial Advisors LLC | 29,853 | $4.34M | 1.61% | −7,500−20.1% | Reduced |
| Ameritas Investment Partners, Inc. | 29,879 | $4.35M | 0.13% | +4,749+18.9% | Added |
| Victory Capital Management Inc | 30,239 | $4.40M | 0.00% | +9,810+48.0% | Added |
| KLP Kapitalforvaltning AS | 30,400 | $4.42M | 0.02% | 00.0% | Unchanged |
| Northwestern Mutual Investment Management Company, LLC | 30,437 | $4.43M | 0.07% | +39+0.1% | Added |
| Mercer Global Advisors Inc | 31,071 | $4.52M | 0.01% | +5,345+20.8% | Added |
| Hennion & Walsh Asset Management, Inc. | 31,212 | $4.54M | 0.15% | +5,998+23.8% | Added |
| Y-Intercept (Hong Kong) Ltd | 31,620 | $4.60M | 0.09% | +31,620 | New |
| Tribune Investment Group LP | 32,000 | $4.65M | 3.13% | −25,000−43.9% | Reduced |
| State of Michigan Retirement System | 32,700 | $4.76M | 0.03% | +600+1.9% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 32,864 | $4.78M | 0.01% | +3,163+10.6% | Added |
| Virtu Financial LLC | 33,021 | $4.80M | 0.20% | +30,267+1,099.0% | Added |
| New Age Alpha Advisors, LLC | 33,291 | $4.84M | 0.23% | −759−2.2% | Reduced |
| Janney Montgomery Scott LLC | 33,437 | $4.86M | 0.01% | −5,577−14.3% | Reduced |
| Spire Wealth Management | 33,596 | $4.89M | 0.17% | +33,596 | New |
| Moore Capital Management, LP | 33,916 | $4.93M | 0.18% | +33,916 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 34,041 | $4.95M | 0.03% | +42+0.1% | Added |
| HighTower Advisors, LLC | 34,055 | $4.95M | 0.01% | +6,333+22.8% | Added |
| Vanguard Investments Australia, Ltd. | 34,056 | $4.95M | 0.01% | +34,056 | New |
| Farmers & Merchants Investments Inc | 34,723 | $5.05M | 0.14% | −7,388−17.5% | Reduced |
| Occudo Quantitative Strategies LP | 32,798 | $5.10M | 0.28% | +32,798 | New |
| Buckingham Strategic Partners | 35,211 | $5.12M | 0.05% | −985−2.7% | Reduced |
| Susquehanna International Group, LLP | 35,349 | $5.14M | 0.01% | +29,212+476.0% | Added |
| H Squared Management LP | 36,200 | $5.27M | 4.85% | +22,400+162.3% | Added |
| CWM, LLC | 36,466 | $5.30M | 0.01% | +9,154+33.5% | Added |
| Rafferty Asset Management, LLC | 36,482 | $5.31M | 0.02% | +2,965+8.8% | Added |
| Arizona State Retirement System | 37,324 | $5.43M | 0.03% | −1,092−2.8% | Reduced |
| Verition Fund Management LLC | 39,142 | $5.69M | 0.06% | +36,825+1,589.3% | Added |
| Nisa Investment Advisors, LLC | 39,221 | $5.71M | 0.02% | +27,119+224.1% | Added |
| Louisiana State Employees Retirement System | 39,400 | $5.73M | 0.10% | +1,800+4.8% | Added |
| Creative Planning | 39,641 | $5.77M | 0.00% | +7,177+22.1% | Added |
| Public Employees Retirement System of Ohio | 39,930 | $5.81M | 0.02% | −1,453−3.5% | Reduced |
| Covea Finance | 40,200 | $5.85M | 0.20% | −9,200−18.6% | Reduced |