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 ($51.4m this quarter). Holder counts are more reliable. Shares outstanding: 136.5m as of 2026-04-21, 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 ≈ $145.23. Options: 20 managers hold calls ($159.2m notional), 20 hold puts ($77.3m).
Trends to Q1 2026
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 |
| Q1 2026 | 678 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| 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 |
| Q1 2026 | 400 | 239 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2025 | $101.4m | $101.3m | 1.00 |
| Q3 2025 | $112.8m | $94.6m | 0.84 |
| Q4 2025 | $176.8m | $71.2m | 0.40 |
| Q1 2026 | $159.2m | $77.3m | 0.49 |
Biggest buyers
| VIKING GLOBAL INVESTORS LP | New | +3.3m |
| Capital Research Global Investors | Added | +2.5m |
| BlackRock, Inc. | Added | +1.8m |
| JANE STREET GROUP, LLC | Added | +1.2m |
| Point72 Asset Management, L.P. | Added | +1.2m |
| SG Americas Securities, LLC | Added | +1.0m |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Added | +840.5k |
| PNC Financial Services Group, Inc. | Added | +785.9k |
| Artemis Investment Management LLP | New | +721.5k |
| Freestone Grove Partners LP | New | +575.9k |
Biggest sellers
| Capital International Investors | Reduced | -11.2m |
| Capital World Investors | Reduced | -1.6m |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -759.2k |
| DENDUR CAPITAL LP | Reduced | -756.2k |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Reduced | -533.0k |
| AMERICAN CENTURY COMPANIES INC | Reduced | -520.7k |
| Jain Global LLC | Reduced | -400.8k |
| Woodline Partners LP | Reduced | -381.8k |
| Corient Private Wealth LP | Reduced | -336.7k |
| NEUBERGER BERMAN GROUP LLC | Reduced | -327.8k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $33.0m226.9k shares |
| CITADEL ADVISORS LLC | Added | $27.7m190.2k shares |
| PEAK6 LLC | Reduced | $25.0m171.7k shares |
| Jain Global LLC | New | $21.8m150.0k shares |
| JANE STREET GROUP, LLC | Reduced | $10.3m70.5k shares |
| IMC-Chicago, LLC | Added | $9.5m65.6k shares |
| Walleye Trading LLC | Added | $6.6m45.2k shares |
| SIMPLEX TRADING, LLC | Reduced | $5.0m34.2k shares |
| Squarepoint Ops LLC | Reduced | $4.6m31.7k shares |
| TUDOR INVESTMENT CORP ET AL | Added | $3.7m25.7k shares |
Biggest puts
| Jain Global LLC | New | $21.8m150.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $11.9m81.8k shares |
| CITADEL ADVISORS LLC | Reduced | $9.3m63.9k shares |
| Walleye Trading LLC | Added | $5.6m38.3k shares |
| SIMPLEX TRADING, LLC | New | $4.2m29.2k shares |
| Walleye Capital LLC | Added | $3.4m23.1k shares |
| IMC-Chicago, LLC | New | $3.2m21.9k shares |
| JANE STREET GROUP, LLC | Reduced | $3.0m20.5k shares |
| TUDOR INVESTMENT CORP ET AL | New | $2.6m18.2k shares |
| CAPITAL FUND MANAGEMENT S.A. | Reduced | $2.5m16.9k 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 Q1 2026
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 |
|---|---|---|---|---|---|
| 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 |
| Q1 2026 | 0 | — | 2 | $5.6m | $4.5m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-03-09 | Morehouse David J Director | Sold | $1.0m6.6k shares |
| 2026-02-17 | WETHERBEE ROBERT S Executive Chairman, director | Sold plan | $3.0m20.8k shares |
| 2026-02-10 | WETHERBEE ROBERT S Executive Chairman, director | Sold plan | $1.5m10.4k 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, Q1 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.04% of their portfolio | 16.4m $2.4bn | Added +1.8m |
| Capital Research Global Investors 0.14% of their portfolio | 6.2m $896.0m | Added +2.5m |
| VANGUARD CAPITAL MANAGEMENT LLC 0.02% of their portfolio | 6.1m $890.8m | First filing |
| Capital International Investors 0.20% of their portfolio | 5.9m $854.9m | Reduced -11.2m |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.04% of their portfolio | 5.8m $846.8m | First filing |
| Capital World Investors 0.11% of their portfolio | 5.7m $831.0m | Reduced -1.6m |
| STATE STREET CORP 0.03% of their portfolio | 5.4m $782.7m | Reduced -218.2k |
| FMR LLC 0.04% of their portfolio | 5.2m $763.3m | Added +172.4k |
| Invesco Ltd. 0.05% of their portfolio | 3.9m $560.8m | Added +470.7k |
| VIKING GLOBAL INVESTORS LP 1.36% of their portfolio | 3.3m $484.8m | New |
| GEODE CAPITAL MANAGEMENT, LLC 0.03% of their portfolio | 2.9m $428.8m | Added +528.2k |
| Point72 Asset Management, L.P. 0.49% of their portfolio | 1.9m $281.1m | Added +1.2m |
| D. E. Shaw & Co., Inc. 0.20% of their portfolio | 1.7m $253.5m | Reduced -280.0k |
| MORGAN STANLEY 0.01% of their portfolio | 1.7m $242.7m | Added +385.1k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.03% of their portfolio | 1.5m $218.5m | Added +14.2k |
| JANE STREET GROUP, LLC 0.23% of their portfolio | 1.5m $216.9m | Added +1.2m |
| UBS Group AG 0.04% of their portfolio | 1.4m $206.4m | Added +226.0k |
| DIMENSIONAL FUND ADVISORS LP 0.04% of their portfolio | 1.4m $198.7m | Reduced -759.2k |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 1.4m $198.5m | Added +565.9k |
| DENDUR CAPITAL LP 13.73% of their portfolio | 1.3m $186.6m | Reduced -756.2k |
| NORTHERN TRUST CORP 0.02% of their portfolio | 1.2m $180.2m | Added +64.9k |
| AQR CAPITAL MANAGEMENT LLC 0.08% of their portfolio | 1.2m $174.1m | Added +202.7k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.09% of their portfolio | 1.2m $175.1m | Added +840.5k |
| Holocene Advisors, LP 0.39% of their portfolio | 1.1m $159.7m | Added +25.8k |
| SG Americas Securities, LLC 0.17% of their portfolio | 1.1m $156.4m | Added +1.0m |
| AMERICAN CENTURY COMPANIES INC 0.08% of their portfolio | 1.1m $155.5m | Reduced -520.7k |
| BOWEN HANES & CO INC 3.69% of their portfolio | 1.0m $151.7m | Reduced -134.6k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.20% of their portfolio | 1.0m $150.2m | Added +24.8k |
| AMERIPRISE FINANCIAL INC 0.03% of their portfolio | 998.8k $145.3m | Reduced -245.4k |
| Fisher Asset Management, LLC 0.05% of their portfolio | 924.5k $134.5m | Added +16.0k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 869.2k $126.4m | Reduced -43.7k |
| Qube Research & Technologies Ltd 0.18% of their portfolio | 858.8k $124.9m | Added +428.6k |
| Balyasny Asset Management L.P. 0.24% of their portfolio | 851.7k $123.9m | Added +461.7k |
| VANGUARD FIDUCIARY TRUST CO 0.03% of their portfolio | 844.4k $122.8m | First filing |
| PNC Financial Services Group, Inc. 0.07% of their portfolio | 831.7k $121.0m | Added +785.9k |
| PRUDENTIAL FINANCIAL INC 0.15% of their portfolio | 810.0k $117.8m | Added +13.5k |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC 0.37% of their portfolio | 782.5k $113.8m | Reduced -75.4k |
| Artemis Investment Management LLP 1.11% of their portfolio | 721.5k $105.0m | New |
| FRONTIER CAPITAL MANAGEMENT CO LLC 1.04% of their portfolio | 694.4k $101.0m | Reduced -533.0k |
| LOOMIS SAYLES & CO L P 0.13% of their portfolio | 653.4k $95.0m | Reduced -282.3k |
| BNP PARIBAS FINANCIAL MARKETS 0.06% of their portfolio | 652.0k $94.8m | Added +259.3k |
| RAYMOND JAMES FINANCIAL INC 0.03% of their portfolio | 638.7k $92.5m | Reduced -164.6k |
| MILLENNIUM MANAGEMENT LLC 0.07% of their portfolio | 619.2k $90.1m | Added +112.4k |
| Assenagon Asset Management S.A. 0.14% of their portfolio | 584.0k $85.0m | Added +558.2k |
| Nuveen, LLC 0.02% of their portfolio | 578.6k $84.2m | Added +31.1k |
| Freestone Grove Partners LP 0.61% of their portfolio | 575.9k $83.8m | New |
| ALLIANCEBERNSTEIN L.P. 0.02% of their portfolio | 575.5k $66.0m | Added +269.0k |
| FEDERATED HERMES, INC. 0.13% of their portfolio | 545.5k $79.4m | Reduced -322 |
| MARSHALL WACE, LLP 0.08% of their portfolio | 536.5k $78.0m | Reduced -91.8k |
| Allspring Global Investments Holdings, LLC 0.13% of their portfolio | 520.2k $78.7m | Reduced -83.5k |
| NEUBERGER BERMAN GROUP LLC 0.05% of their portfolio | 494.9k $72.0m | Reduced -327.8k |
| BANK OF NOVA SCOTIA 0.12% of their portfolio | 467.1k $68.0m | Added +224.9k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 447.8k $65.1m | Added +85.4k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 407.4k $55.2m | Added +52.5k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.04% of their portfolio | 402.6k $54.6m | Reduced -51.0k |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. 0.56% of their portfolio | 382.4k $55.6m | Added +4.8k |
| ING GROEP NV 0.34% of their portfolio | 377.5k $54.9m | Added +182.2k |
| Square Wave Capital, LLC 12.89% of their portfolio | 366.4k $53.3m | New |
| GAMCO INVESTORS, INC. ET AL 0.52% of their portfolio | 361.5k $52.6m | Reduced -21.6k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 354.7k $51.6m | Added +2.4k |
| RHUMBLINE ADVISERS 0.04% of their portfolio | 354.4k $51.5m | Added +6.8k |
| WELLS FARGO & COMPANY/MN 0.01% of their portfolio | 351.1k $51.1m | Added +133.4k |
| JUPITER ASSET MANAGEMENT LTD 0.27% of their portfolio | 341.7k $49.7m | Added +216.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 328.7k $47.8m | Reduced -169.4k |
| Retirement Systems of Alabama 0.15% of their portfolio | 312.3k $45.4m | Added +3.5k |
| CITADEL ADVISORS LLC 0.03% of their portfolio | 303.3k $44.1m | Added +200.6k |
| PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio | 303.2k $44.1m | Added +11.0k |
| SEGALL BRYANT & HAMILL, LLC 0.58% of their portfolio | 277.4k $40.3m | Reduced -44.3k |
| Swiss National Bank 0.02% of their portfolio | 268.8k $39.1m | Reduced -2.9k |
| Allianz Asset Management GmbH 0.04% of their portfolio | 267.8k $39.0m | Added +25.3k |
| Jain Global LLC 0.49% of their portfolio | 264.5k $38.5m | Reduced -400.8k |
| KLCM Advisors, Inc. 3.33% of their portfolio | 262.8k $38.2m | Reduced -59.8k |
| Amundi 0.01% of their portfolio | 261.2k $38.0m | Added +231.3k |
| Gotham Asset Management, LLC 0.12% of their portfolio | 260.5k $37.9m | Reduced -30.5k |
| California Public Employees Retirement System 0.02% of their portfolio | 253.8k $36.9m | Reduced -892 |
| HRT FINANCIAL LP 0.13% of their portfolio | 252.9k $36.8m | Added +188.8k |
| BLAIR WILLIAM & CO/IL 0.10% of their portfolio | 237.0k $34.5m | Added +192.9k |
| Capital International, Inc./CA/ 0.26% of their portfolio | 234.9k $34.2m | Reduced -91.1k |
| ENVESTNET ASSET MANAGEMENT INC 0.01% of their portfolio | 215.8k $31.4m | Added +152.5k |
| Driehaus Capital Management LLC 0.23% of their portfolio | 212.7k $30.9m | Reduced -377 |
| Legal & General Group Plc 0.01% of their portfolio | 212.0k $30.8m | Reduced -12.8k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.07% of their portfolio | 202.0k $29.4m | Reduced -26.8k |
| HAWK RIDGE CAPITAL MANAGEMENT LP 0.98% of their portfolio | 185.6k $27.0m | Reduced -23.9k |
| Aventail Capital Group, LP 1.30% of their portfolio | 185.3k $27.0m | New |
| LORD, ABBETT & CO. LLC 0.09% of their portfolio | 182.0k $26.5m | Reduced -85.0k |
| EMERALD ADVISERS, LLC 0.84% of their portfolio | 181.5k $26.4m | Reduced -126.1k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 171.0k $24.9m | Added +94.8k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.02% of their portfolio | 167.7k $24.4m | Reduced -77.8k |
| LPL Financial LLC 0.01% of their portfolio | 165.6k $24.1m | Added +98.9k |
| PANAGORA ASSET MANAGEMENT INC 0.09% of their portfolio | 165.5k $24.1m | Added +140.1k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio | 157.8k $22.9m | Added +27.3k |
| 1832 Asset Management L.P. 0.03% of their portfolio | 151.5k $22.0m | Reduced -143.0k |
| Walleye Capital LLC 0.13% of their portfolio | 146.1k $21.3m | Added +43.8k |
| Senator Investment Group LP 0.97% of their portfolio | 145.0k $21.1m | Reduced -180.0k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.04% of their portfolio | 134.6k $19.6m | Reduced -13.3k |
| NATIXIS ADVISORS, LLC 0.03% of their portfolio | 124.3k $18.1m | Reduced -27.0k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.03% of their portfolio | 117.1k $17.0m | Reduced -122.5k |
| Sanctuary Advisors, LLC 0.09% of their portfolio | 115.6k $16.8m | Reduced -19.6k |
| Russell Investments Group, Ltd. 0.02% of their portfolio | 109.2k $15.9m | Added +79.2k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 107.9k $15.7m | Reduced -3.2k |