ATI INC ATI
COM · Common Stock · CUSIP 01741R102 · ISIN US01741R1023
- SectorMaterials
- IndustrySteel Pipe & Tubes
- HeadquartersDallas, TX
- Founded1996
- Websiteatimetals.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($47.4m this quarter). Holder counts are more reliable. Shares outstanding: 136.9m as of 2026-01-30, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $114.80. Options: 19 managers hold calls ($176.8m notional), 13 hold puts ($71.2m).
Trends to Q4 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 293 |
| Q4 2022 | 305 |
| Q1 2023 | 340 |
| Q2 2023 | 330 |
| Q3 2023 | 340 |
| Q4 2023 | 351 |
| Q1 2024 | 346 |
| Q2 2024 | 403 |
| Q3 2024 | 422 |
| Q4 2024 | 404 |
| Q1 2025 | 428 |
| Q2 2025 | 473 |
| Q3 2025 | 470 |
| Q4 2025 | 570 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q1 2024 | 161 | 180 |
| Q2 2024 | 208 | 177 |
| Q3 2024 | 198 | 202 |
| Q4 2024 | 196 | 217 |
| Q1 2025 | 242 | 179 |
| Q2 2025 | 232 | 247 |
| Q3 2025 | 237 | 238 |
| Q4 2025 | 293 | 217 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q1 2025 | $31.3m | $13.0m | 0.41 |
| Q2 2025 | $101.4m | $101.3m | 1.00 |
| Q3 2025 | $112.8m | $94.6m | 0.84 |
| Q4 2025 | $176.8m | $71.2m | 0.40 |
Biggest buyers
| AQR CAPITAL MANAGEMENT LLC | Added | +889.9k |
| UBS Group AG | Added | +702.7k |
| Jain Global LLC | Added | +643.9k |
| PRUDENTIAL FINANCIAL INC | Added | +567.1k |
| Point72 Asset Management, L.P. | Added | +451.0k |
| Qube Research & Technologies Ltd | New | +430.2k |
| Balyasny Asset Management L.P. | New | +390.0k |
| Capital Research Global Investors | Added | +386.8k |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. | New | +377.6k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | New | +363.3k |
Biggest sellers
| ROYAL BANK OF CANADA | Reduced | -1.2m |
| D. E. Shaw & Co., Inc. | Reduced | -1.0m |
| Channing Capital Management, LLC | Reduced | -1.0m |
| DENDUR CAPITAL LP | Reduced | -649.9k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -576.0k |
| Capital World Investors | Reduced | -544.8k |
| Rokos Capital Management LLP | Sold out | -527.3k |
| Holocene Advisors, LP | Reduced | -462.4k |
| STATE STREET CORP | Reduced | -443.0k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | -404.7k |
Biggest calls
| PEAK6 LLC | Added | $46.5m405.2k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $29.5m256.8k shares |
| Twin Tree Management, LP | Reduced | $26.6m232.1k shares |
| CITADEL ADVISORS LLC | Reduced | $15.2m132.5k shares |
| JANE STREET GROUP, LLC | Added | $11.5m100.2k shares |
| Schonfeld Strategic Advisors LLC | New | $11.5m100.0k shares |
| Squarepoint Ops LLC | Reduced | $10.7m93.1k shares |
| SIMPLEX TRADING, LLC | Added | $5.6m48.9k shares |
| IMC-Chicago, LLC | Reduced | $5.1m44.7k shares |
| Walleye Trading LLC | Added | $3.2m28.3k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $26.1m227.5k shares |
| CITADEL ADVISORS LLC | Reduced | $15.5m134.7k shares |
| Twin Tree Management, LP | Reduced | $13.0m113.2k shares |
| JANE STREET GROUP, LLC | Reduced | $4.2m36.8k shares |
| CAPITAL FUND MANAGEMENT S.A. | Reduced | $4.1m35.5k shares |
| Point72 Asset Management, L.P. | New | $2.6m22.7k shares |
| Walleye Trading LLC | Reduced | $1.9m16.7k shares |
| Walleye Capital LLC | Reduced | $1.3m11.5k shares |
| Squarepoint Ops LLC | Reduced | $757.4k6.6k shares |
| D. E. Shaw & Co., Inc. | Unchanged | $619.7k5.4k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution +1.8 pts · filed 2026-10-27 | 11.9% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.2% |
Fell to 5% or below in the last year: Capital World Investors (4.2%, 2026-05-14), Capital International Investors (4.5%, 2026-04-07), VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD CAPITAL MANAGEMENT LLC)
Insider purchases and sales in Q4 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q1 2024 | 0 | — | 2 | $3.4m | — |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 1 | $1.5m | $1.5m |
| Q4 2024 | 0 | — | 2 | $4.6m | $4.4m |
| Q1 2025 | 0 | — | 1 | $657.5k | — |
| Q2 2025 | 0 | — | 2 | $16.3m | $15.5m |
| Q3 2025 | 0 | — | 3 | $7.2m | $6.6m |
| Q4 2025 | 0 | — | 4 | $19.7m | $19.5m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-12-18 | WETHERBEE ROBERT S Executive Chairman, director | Sold plan | $5.9m53.9k shares |
| 2025-11-25 | Harris Timothy J Senior VP and CDIO | Sold plan | $1.0m10.5k shares |
| 2025-11-21 | Busch Tina Killough SVP, CHRO | Sold | $242.3k2.6k shares |
| 2025-11-18 | WETHERBEE ROBERT S Executive Chairman, director | Sold plan | $5.9m60.0k shares |
| 2025-11-18 | Harris Timothy J Senior VP and CDIO | Sold plan | $1.0m10.5k shares |
| 2025-11-11 | Harris Timothy J Senior VP and CDIO | Sold plan | $1.0m10.5k shares |
| 2025-11-04 | Harris Timothy J Senior VP and CDIO | Sold plan | $1.0m10.5k shares |
| 2025-10-15 | Fields Kimberly A President, CEO and Director, director | Sold plan | $1.8m21.2k shares |
| 2025-10-06 | Fields Kimberly A President, CEO and Director, director | Sold plan | $1.7m21.2k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q4 2025
| Manager | Shares | Change |
|---|---|---|
| Capital International Investors 0.31% of their portfolio | 17.1m $2.0bn | Reduced -51.8k |
| BlackRock, Inc. 0.03% of their portfolio | 14.7m $1.7bn | Reduced -190.7k |
| VANGUARD GROUP INC 0.02% of their portfolio | 12.7m $1.5bn | Reduced -327.7k |
| Capital World Investors 0.11% of their portfolio | 7.4m $844.2m | Reduced -544.8k |
| STATE STREET CORP 0.02% of their portfolio | 5.6m $642.6m | Reduced -443.0k |
| FMR LLC 0.03% of their portfolio | 5.1m $582.4m | Added +175.7k |
| Capital Research Global Investors 0.08% of their portfolio | 3.6m $414.5m | Added +386.8k |
| Invesco Ltd. 0.04% of their portfolio | 3.4m $388.5m | Added +233.0k |
| GEODE CAPITAL MANAGEMENT, LLC 0.02% of their portfolio | 2.4m $277.7m | Reduced -25.5k |
| DIMENSIONAL FUND ADVISORS LP 0.05% of their portfolio | 2.1m $244.0m | Reduced -16.0k |
| DENDUR CAPITAL LP 24.34% of their portfolio | 2.0m $234.0m | Reduced -649.9k |
| D. E. Shaw & Co., Inc. 0.18% of their portfolio | 2.0m $232.1m | Reduced -1.0m |
| NORGES BANK 0.02% of their portfolio | 1.7m $198.8m | Not comparable |
| AMERICAN CENTURY COMPANIES INC 0.09% of their portfolio | 1.6m $182.5m | Added +215.6k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.03% of their portfolio | 1.5m $170.8m | Reduced -23.4k |
| MORGAN STANLEY 0.01% of their portfolio | 1.3m $147.3m | Reduced -130.8k |
| AMERIPRISE FINANCIAL INC 0.03% of their portfolio | 1.2m $142.8m | Reduced -70.7k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 1.49% of their portfolio | 1.2m $140.9m | Reduced -327.1k |
| UBS Group AG 0.03% of their portfolio | 1.2m $136.9m | Added +702.7k |
| BOWEN HANES & CO INC 3.39% of their portfolio | 1.2m $135.2m | Reduced -151.5k |
| NORTHERN TRUST CORP 0.02% of their portfolio | 1.2m $134.7m | Reduced -52.6k |
| Holocene Advisors, LP 0.26% of their portfolio | 1.1m $123.0m | Reduced -462.4k |
| AQR CAPITAL MANAGEMENT LLC 0.06% of their portfolio | 1.0m $117.0m | Added +889.9k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.17% of their portfolio | 1.0m $115.7m | Added +21.4k |
| LOOMIS SAYLES & CO L P 0.13% of their portfolio | 935.7k $107.4m | Reduced -73.8k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 912.9k $104.8m | Reduced -5.0k |
| Fisher Asset Management, LLC 0.04% of their portfolio | 908.5k $104.3m | Reduced -49.2k |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC 0.33% of their portfolio | 857.9k $98.5m | Reduced -64.8k |
| NEUBERGER BERMAN GROUP LLC 0.07% of their portfolio | 822.7k $94.4m | Reduced -125.7k |
| RAYMOND JAMES FINANCIAL INC 0.03% of their portfolio | 803.3k $92.3m | Reduced -69.1k |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 799.1k $91.7m | Added +65.5k |
| PRUDENTIAL FINANCIAL INC 0.11% of their portfolio | 796.4k $91.4m | Added +567.1k |
| Point72 Asset Management, L.P. 0.14% of their portfolio | 760.2k $87.2m | Added +451.0k |
| Jain Global LLC 0.75% of their portfolio | 665.3k $76.3m | Added +643.9k |
| MARSHALL WACE, LLP 0.07% of their portfolio | 628.3k $72.1m | Added +114.3k |
| Allspring Global Investments Holdings, LLC 0.12% of their portfolio | 603.7k $72.0m | Reduced -29.6k |
| Nuveen, LLC 0.02% of their portfolio | 547.5k $62.8m | Added +128.1k |
| FEDERATED HERMES, INC. 0.10% of their portfolio | 545.9k $62.6m | Added +54.0k |
| MILLENNIUM MANAGEMENT LLC 0.04% of their portfolio | 506.9k $58.2m | Added +169.3k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 498.2k $57.2m | Reduced -576.0k |
| Woodline Partners LP 0.21% of their portfolio | 471.2k $54.1m | Reduced -275.9k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.04% of their portfolio | 453.5k $52.7m | Reduced -6.4k |
| Qube Research & Technologies Ltd 0.07% of their portfolio | 430.2k $49.4m | New |
| BNP PARIBAS FINANCIAL MARKETS 0.03% of their portfolio | 392.7k $45.1m | Reduced -107.3k |
| Balyasny Asset Management L.P. 0.08% of their portfolio | 390.0k $44.8m | New |
| GAMCO INVESTORS, INC. ET AL 0.42% of their portfolio | 383.1k $44.0m | Reduced -12.7k |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. 0.42% of their portfolio | 377.6k $43.3m | New |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 377.4k $43.3m | Reduced -79.9k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.02% of their portfolio | 363.3k $41.7m | New |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 362.4k $41.6m | Reduced -13.9k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 354.9k $40.7m | Reduced -311.5k |
| TRAN CAPITAL MANAGEMENT, L.P. 4.84% of their portfolio | 352.3k $40.4m | Added +62.9k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 352.3k $40.4m | Reduced -8.6k |
| Corient Private Wealth LP 0.03% of their portfolio | 348.4k $40.5m | Reduced -3.8k |
| RHUMBLINE ADVISERS 0.03% of their portfolio | 347.5k $39.9m | Reduced -14.7k |
| Capital International, Inc./CA/ 0.29% of their portfolio | 326.1k $37.4m | Reduced -88.0k |
| Senator Investment Group LP 1.50% of their portfolio | 325.0k $37.3m | Unchanged |
| KLCM Advisors, Inc. 3.18% of their portfolio | 322.7k $37.0m | Reduced -31.2k |
| SEGALL BRYANT & HAMILL, LLC 0.50% of their portfolio | 321.7k $36.9m | Reduced -60.0k |
| Retirement Systems of Alabama 0.12% of their portfolio | 308.8k $35.4m | Reduced -3.6k |
| EMERALD ADVISERS, LLC 1.09% of their portfolio | 307.6k $35.3m | Reduced -5.5k |
| ALLIANCEBERNSTEIN L.P. 0.01% of their portfolio | 306.5k $35.2m | Added +34.7k |
| 1832 Asset Management L.P. 0.04% of their portfolio | 294.5k $33.8m | New |
| PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio | 292.1k $33.5m | Reduced -14.0k |
| Gotham Asset Management, LLC 0.12% of their portfolio | 291.0k $33.4m | Added +93.5k |
| JANE STREET GROUP, LLC 0.04% of their portfolio | 277.2k $31.8m | Added +187.2k |
| MUFG Securities EMEA plc 0.37% of their portfolio | 277.0k $31.8m | New |
| Swiss National Bank 0.02% of their portfolio | 271.7k $31.2m | Reduced -1.7k |
| LORD, ABBETT & CO. LLC 0.09% of their portfolio | 267.0k $30.6m | New |
| NATIXIS 0.12% of their portfolio | 264.1k $30.3m | New |
| Cartenna Capital, LP 1.57% of their portfolio | 260.0k $29.8m | New |
| California Public Employees Retirement System 0.02% of their portfolio | 254.7k $29.2m | Reduced -3.0k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.02% of their portfolio | 245.5k $28.2m | Added +8.9k |
| Allianz Asset Management GmbH 0.03% of their portfolio | 242.5k $27.8m | Added +133.0k |
| BANK OF NOVA SCOTIA 0.04% of their portfolio | 242.2k $27.8m | Reduced -22.9k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.04% of their portfolio | 239.6k $27.5m | First filing |
| STATE OF WISCONSIN INVESTMENT BOARD 0.06% of their portfolio | 228.8k $26.3m | Reduced -33.6k |
| Legal & General Group Plc 0.01% of their portfolio | 224.8k $25.8m | Reduced -15.1k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 217.8k $25.0m | Reduced -2.4k |
| Driehaus Capital Management LLC 0.17% of their portfolio | 213.1k $24.5m | New |
| HAWK RIDGE CAPITAL MANAGEMENT LP 1.11% of their portfolio | 209.5k $24.0m | Reduced -65.1k |
| ING GROEP NV 0.14% of their portfolio | 195.3k $22.4m | Reduced -98.2k |
| EMERALD MUTUAL FUND ADVISERS TRUST 1.03% of their portfolio | 183.6k $21.1m | Unchanged |
| HSBC HOLDINGS PLC 0.01% of their portfolio | 181.6k $21.0m | Added +154.3k |
| CIBC WORLD MARKETS CORP 0.10% of their portfolio | 177.4k $20.4m | First filing |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.07% of their portfolio | 175.7k $20.2m | Reduced -404.7k |
| Concentric Capital Strategies, LP 0.96% of their portfolio | 162.0k $18.6m | New |
| NATIXIS ADVISORS, LLC 0.02% of their portfolio | 151.3k $17.4m | Added +75.3k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.03% of their portfolio | 148.0k $17.0m | Reduced -2.0k |
| SIGNATURE ESTATE & INVESTMENT ADVISORS LLC 0.33% of their portfolio | 144.3k $16.6m | Added +618 |
| BARCLAYS PLC 0.01% of their portfolio | 139.5k $16.0m | Reduced -180.1k |
| Sanctuary Advisors, LLC 0.08% of their portfolio | 135.3k $15.5m | Added +53.6k |
| Man Group plc 0.03% of their portfolio | 131.7k $15.1m | Added +103.1k |
| ROYCE & ASSOCIATES LP 0.15% of their portfolio | 131.5k $15.1m | Reduced -5.9k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 130.4k $15.0m | Reduced -3.7k |
| Mountaineer Partners Management, LLC 8.28% of their portfolio | 128.9k $14.8m | Reduced -15.1k |
| ALGERT GLOBAL LLC 0.23% of their portfolio | 127.9k $14.7m | Added +20.0k |
| JUPITER ASSET MANAGEMENT LTD 0.11% of their portfolio | 125.1k $14.4m | Reduced -12.7k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 119.6k $13.7m | Added +2.1k |
| Weiss Asset Management LP 0.19% of their portfolio | 119.0k $13.7m | Added +108.8k |