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 |
|---|---|---|---|---|---|
| Universal- Beteiligungs- und Servicegesellschaft mbH | 32,864 | $4.78M | 0.01% | +3,163+10.6% | Added |
| State of Michigan Retirement System | 32,700 | $4.76M | 0.03% | +600+1.9% | Added |
| Tribune Investment Group LP | 32,000 | $4.65M | 3.13% | −25,000−43.9% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 31,620 | $4.60M | 0.09% | +31,620 | New |
| Hennion & Walsh Asset Management, Inc. | 31,212 | $4.54M | 0.15% | +5,998+23.8% | Added |
| Mercer Global Advisors Inc | 31,071 | $4.52M | 0.01% | +5,345+20.8% | Added |
| Northwestern Mutual Investment Management Company, LLC | 30,437 | $4.43M | 0.07% | +39+0.1% | Added |
| KLP Kapitalforvaltning AS | 30,400 | $4.42M | 0.02% | 00.0% | Unchanged |
| Victory Capital Management Inc | 30,239 | $4.40M | 0.00% | +9,810+48.0% | Added |
| Ameritas Investment Partners, Inc. | 29,879 | $4.35M | 0.13% | +4,749+18.9% | Added |
| Register Financial Advisors LLC | 29,853 | $4.34M | 1.61% | −7,500−20.1% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 31,790 | $4.30M | 0.01% | +6,142+23.9% | Added |
| Envestnet Portfolio Solutions, Inc. | 28,970 | $4.21M | 0.02% | −8,808−23.3% | Reduced |
| Cookson Peirce & Co Inc | 28,949 | $4.21M | 0.18% | −6,524−18.4% | Reduced |
| New Mexico Educational Retirement Board | 28,800 | $4.19M | 0.13% | 00.0% | Unchanged |
| Pier Capital, LLC | 28,721 | $4.18M | 0.69% | −331−1.1% | Reduced |
| HSBC Holdings PLC | 28,788 | $4.16M | 0.00% | −61,993−68.3% | Reduced |
| Pinebridge Investments LLC | 28,258 | $4.11M | 0.03% | +28,258 | New |
| Candelo Capital Management LP | 28,146 | $4.09M | 4.12% | −35,250−55.6% | Reduced |
| Oregon Public Employees Retirement Fund | 27,835 | $4.05M | 0.05% | +742+2.7% | Added |
| Hudson Bay Capital Management LP | 27,397 | $3.99M | 0.02% | −64,499−70.2% | Reduced |
| Freemont Management S.A. | 27,300 | $3.97M | 0.74% | +7,400+37.2% | Added |
| Cetera Investment Advisers | 26,675 | $3.88M | 0.00% | +11,492+75.7% | Added |
| Nilsine Partners, LLC | 25,025 | $3.84M | 0.30% | +13,093+109.7% | Added |
| Susquehanna Portfolio Strategies, LLC | 26,133 | $3.80M | 0.06% | 00.0% | Unchanged |
| Wiley Bros.-Aintree Capital, LLC | 25,857 | $3.80M | 0.02% | +9,750+60.5% | Added |
| Expect Equity LLC | 25,945 | $3.77M | 2.94% | −2,465−8.7% | Reduced |
| Capital Fund Management S.A. | 25,759 | $3.75M | 0.03% | −36,916−58.9% | Reduced |
| MML Investors Services, LLC | 25,348 | $3.69M | 0.01% | +18,159+252.6% | Added |
| Capstone Investment Advisors, LLC | 25,019 | $3.64M | 0.03% | +18,615+290.7% | Added |
| Lazard Asset Management LLC | 24,105 | $3.51M | 0.01% | +17,785+281.4% | Added |
| Erste Asset Management GmbH | 25,780 | $3.49M | 0.03% | 00.0% | Unchanged |
| Mivtachim The Workers Social Insurance Fund Ltd. (Under Special Management) | 24,000 | $3.49M | 0.44% | +24,000 | New |
| Bank of Montreal | 23,837 | $3.47M | 0.00% | −2,250−8.6% | Reduced |
| Schonfeld Strategic Advisors LLC | 23,543 | $3.42M | 0.03% | −83,588−78.0% | Reduced |
| Dymon Asia Capital (Singapore) Pte. Ltd. | 23,120 | $3.36M | 0.74% | −5,280−18.6% | Reduced |
| OP Asset Management Ltd | 22,985 | $3.34M | 0.03% | +2,586+12.7% | Added |
| Squarepoint Ops LLC | 22,841 | $3.32M | 0.01% | +15,664+218.3% | Added |
| Huntington National Bank | 22,699 | $3.30M | 0.02% | −446−1.9% | Reduced |
| Pictet Asset Management Holding SA | 22,141 | $3.22M | 0.00% | +1,389+6.7% | Added |
| Bridgewater Associates, LP | 21,950 | $3.19M | 0.01% | +21,950 | New |
| Axq Capital, LP | 21,692 | $3.16M | 0.41% | +21,692 | New |
| Pacer Advisors, Inc. | 21,679 | $3.15M | 0.01% | +5,532+34.3% | Added |
| Quantbot Technologies LP | 21,632 | $3.15M | 0.13% | −16,042−42.6% | Reduced |
| Teacher Retirement System of Texas | 21,555 | $3.14M | 0.01% | +1,341+6.6% | Added |
| Hantz Financial Services, Inc. | 20,990 | $3.05M | 0.05% | +949+4.7% | Added |
| Ensign Peak Advisors, Inc | 20,815 | $3.03M | 0.01% | +5,250+33.7% | Added |
| DnB Asset Management AS | 20,789 | $3.02M | 0.01% | +18,827+959.6% | Added |
| Federation des caisses Desjardins du Quebec | 19,929 | $2.90M | 0.01% | +9,070+83.5% | Added |
| Graphene Investments SAS | 19,900 | $2.89M | 1.94% | −8,500−29.9% | Reduced |
| Steward Partners Investment Advisory, LLC | 19,841 | $2.89M | 0.01% | +15,050+314.1% | Added |
| Legacy Capital Wealth Management, LLC | 19,271 | $2.80M | 1.64% | +19,271 | New |
| Park Avenue Securities LLC | 19,049 | $2.77M | 0.02% | +19,049 | New |
| Entropy Technologies, LP | 19,026 | $2.77M | 0.13% | +19,026 | New |
| Natixis | 18,302 | $2.66M | 0.01% | −245,765−93.1% | Reduced |
| 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 |
| Bridgeway Capital Management, LLC | 17,900 | $2.60M | 0.05% | +17,900 | New |
| Two Sigma Investments, LP | 17,775 | $2.59M | 0.00% | +15,808+803.7% | Added |
| Advisory Services Network, LLC | 17,698 | $2.57M | 0.03% | +757+4.5% | Added |
| Marathon Partners Equity Management, LLC | 17,500 | $2.55M | 2.90% | −2,500−12.5% | Reduced |
| Xponance, Inc. | 17,371 | $2.53M | 0.02% | +3,951+29.4% | Added |
| Sciencast Management LP | 17,329 | $2.52M | 0.32% | +8,685+100.5% | Added |
| CWM Advisors, LLC | 17,046 | $2.48M | 0.14% | +5,484+47.4% | Added |
| Thoroughbred Financial Services, LLC | 16,639 | $2.42M | 0.14% | +2,686+19.3% | Added |
| Knights of Columbus Asset Advisors LLC | 16,635 | $2.42M | 0.14% | +1,839+12.4% | Added |
| JustInvest LLC | 16,515 | $2.40M | 0.02% | +349+2.2% | Added |
| Donoghue Forlines LLC | 16,225 | $2.36M | 0.65% | +16,225 | New |
| Franklin Resources Inc | 16,139 | $2.35M | 0.00% | +11,115+221.2% | Added |
| RMB Capital Management, LLC | 16,125 | $2.35M | 0.04% | +18+0.1% | Added |
| Quadrant Capital Group LLC | 16,122 | $2.35M | 0.07% | +349+2.2% | Added |
| Havemeyer Place LP | 16,058 | $2.34M | 0.27% | +2,426+17.8% | Added |
| Virginia Retirement Systems Et Al | 16,028 | $2.33M | 0.02% | +5,800+56.7% | Added |
| Bragg Financial Advisors, Inc | 15,985 | $2.33M | 0.07% | 00.0% | Unchanged |
| NVWM, LLC | 15,713 | $2.29M | 0.51% | −172−1.1% | Reduced |
| Gabelli Funds LLC | 15,316 | $2.23M | 0.02% | +1,620+11.8% | Added |
| Twin Tree Management, LP | 14,980 | $2.18M | 0.46% | +14,980 | New |
| Allstate Corp | 14,951 | $2.17M | 0.02% | +14,951 | New |
| Raiffeisen Bank International AG | 16,000 | $2.17M | 0.03% | 00.0% | Unchanged |
| Catalyst Funds Management Pty Ltd | 14,732 | $2.14M | 0.36% | +12,632+601.5% | Added |
| Commonwealth Equity Services, LLC | 14,662 | $2.13M | 0.00% | +992+7.3% | Added |
| Cambridge Investment Research Advisors, Inc. | 14,635 | $2.13M | 0.01% | +360+2.5% | Added |
| Little House Capital LLC | 14,447 | $2.10M | 0.54% | +14,447 | New |
| Kovitz Investment Group Partners, LLC | 14,418 | $2.10M | 0.05% | −5,534−27.7% | Reduced |
| PVG Asset Management Corp | 10,475 | $2.05M | 1.22% | +10,475 | New |
| Aigen Investment Management, LP | 14,063 | $2.05M | 0.53% | +14,063 | New |
| Atria Investments LLC | 13,943 | $2.03M | 0.02% | −2,944−17.4% | Reduced |
| State of Alaska, Department of Revenue | 13,721 | $2.00M | 0.02% | +225+1.7% | Added |
| Los Angeles Capital Management LLC | 13,574 | $1.97M | 0.01% | −14,962−52.4% | Reduced |
| FourThought Financial Partners, LLC | 13,259 | $1.93M | 0.17% | −568−4.1% | Reduced |
| Capital International Sarl | 13,137 | $1.91M | 0.03% | +4,600+53.9% | Added |
| Public Employees Retirement Association of Colorado | 13,019 | $1.89M | 0.01% | 00.0% | Unchanged |
| Kestra Private Wealth Services, LLC | 13,011 | $1.89M | 0.02% | +3,260+33.4% | Added |
| Nomura Holdings Inc | 12,932 | $1.88M | 0.02% | −6,395−33.1% | Reduced |
| Old West Investment Management, LLC | 12,555 | $1.83M | 0.20% | 00.0% | Unchanged |
| Oak Thistle LLC | 12,095 | $1.76M | 0.17% | +12,095 | New |
| Fruth Investment Management | 12,050 | $1.75M | 0.44% | −700−5.5% | Reduced |
| Farmers & Merchants Trust Co of Long Beach | 11,831 | $1.72M | 0.40% | 00.0% | Unchanged |
| Jefferies Financial Group Inc. | 11,571 | $1.68M | 0.02% | −11,782−50.5% | Reduced |
| O'Shaughnessy Asset Management, LLC | 11,282 | $1.64M | 0.01% | +2,361+26.5% | Added |