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 ($66.0m this quarter). Holder counts are more reliable. Shares outstanding: 136.2m as of 2026-08-03, 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 ≈ $196.35. Options: 20 managers hold calls ($191.9m notional), 20 hold puts ($140.3m).
Trends to Q2 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 |
| Q2 2026 | 791 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| 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 |
| Q2 2026 | 469 | 275 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $112.8m | $94.6m | 0.84 |
| Q4 2025 | $176.8m | $71.2m | 0.40 |
| Q1 2026 | $159.2m | $77.3m | 0.49 |
| Q2 2026 | $191.9m | $140.3m | 0.73 |
Biggest buyers
| BlackRock, Inc. | Added | +2.3m |
| Qube Research & Technologies Ltd | Added | +1.3m |
| BESSEMER GROUP INC | Added | +952.9k |
| POLEN CAPITAL MANAGEMENT LLC | New | +819.2k |
| Assenagon Asset Management S.A. | Added | +730.2k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +693.1k |
| TWO SIGMA INVESTMENTS, LP | Added | +618.9k |
| DSM CAPITAL PARTNERS LLC | New | +441.0k |
| BANK OF AMERICA CORP /DE/ | Added | +402.1k |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Added | +398.4k |
Biggest sellers
| VIKING GLOBAL INVESTORS LP | Reduced | -2.2m |
| Capital International Investors | Reduced | -2.2m |
| Capital Research Global Investors | Reduced | -1.1m |
| UBS Group AG | Reduced | -954.4k |
| D. E. Shaw & Co., Inc. | Reduced | -927.0k |
| PNC Financial Services Group, Inc. | Reduced | -796.5k |
| Point72 Asset Management, L.P. | Reduced | -692.2k |
| PRUDENTIAL FINANCIAL INC | Reduced | -628.7k |
| Holocene Advisors, LP | Reduced | -600.0k |
| SG Americas Securities, LLC | Reduced | -585.9k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $49.0m248.5k shares |
| JANE STREET GROUP, LLC | Added | $38.5m195.5k shares |
| Jain Global LLC | Unchanged | $29.6m150.0k shares |
| CITADEL ADVISORS LLC | Reduced | $22.5m114.1k shares |
| IMC-Chicago, LLC | Added | $17.0m86.1k shares |
| TUDOR INVESTMENT CORP ET AL | Added | $6.5m33.2k shares |
| Walleye Trading LLC | Reduced | $6.4m32.3k shares |
| SIMPLEX TRADING, LLC | Reduced | $6.3m31.8k shares |
| BNP PARIBAS FINANCIAL MARKETS | New | $4.4m224 shares |
| D. E. Shaw & Co., Inc. | Unchanged | $1.9m9.6k shares |
Biggest puts
| Jain Global LLC | Added | $49.3m250.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $23.2m117.9k shares |
| Oribel Capital Management, LP | New | $19.0m96.5k shares |
| JANE STREET GROUP, LLC | Added | $18.2m92.2k shares |
| CITADEL ADVISORS LLC | Reduced | $9.5m48.1k shares |
| IMC-Chicago, LLC | Added | $8.6m43.8k shares |
| BOOTHBAY FUND MANAGEMENT, LLC | New | $2.0m9.9k shares |
| Walleye Trading LLC | Reduced | $1.7m8.4k shares |
| TWO SIGMA INVESTMENTS, LP | Added | $1.5m7.4k shares |
| TUDOR INVESTMENT CORP ET AL | Reduced | $1.3m6.5k 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 since 1 Apr 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 |
|---|---|---|---|---|---|
| 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 |
| Q2 2026 | 0 | — | 1 | $21.2m | $21.2m |
| Q3 2026 | 0 | — | 3 | $34.8m | $34.3m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-21 | Harris Timothy J Senior VP and CDIO | Sold plan | $1.7m9.0k shares |
| 2026-09-14 | Harris Timothy J Senior VP and CDIO | Sold plan | $3.2m16.5k shares |
| 2026-09-08 | Harris Timothy J Senior VP and CDIO | Sold plan | $3.4m16.5k shares |
| 2026-09-02 | Morehouse David J Director | Sold | $501.0k2.5k shares |
| 2026-08-31 | Harris Timothy J Senior VP and CDIO | Sold plan | $3.5m16.5k shares |
| 2026-08-24 | Harris Timothy J Senior VP and CDIO | Sold plan | $3.4m16.5k shares |
| 2026-08-17 | Fields Kimberly A Chair, President and CEO, director | Sold plan | $5.7m24.8k shares |
| 2026-07-28 | Fields Kimberly A Chair, President and CEO, director | Sold plan | $6.1m31.8k shares |
| 2026-07-07 | Fields Kimberly A Chair, President and CEO, director | Sold plan | $7.3m40.0k shares |
| 2026-06-24 | Fields Kimberly A Chair, President and CEO, director | Sold plan | $746.0k3.8k shares |
| 2026-06-23 | Fields Kimberly A Chair, President and CEO, director | Sold plan | $719.0k3.6k shares |
| 2026-06-22 | Fields Kimberly A Chair, President and CEO, director | Sold plan | $2.7m13.3k shares |
| 2026-06-02 | Fields Kimberly A Chair, President and CEO, director | Sold plan | $10.7m59.7k shares |
| 2026-05-11 | Fields Kimberly A President, CEO and Director, director | Sold plan | $6.4m40.0k 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, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.05% of their portfolio | 18.7m $3.7bn | Added +2.3m |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.06% of their portfolio | 6.2m $1.2bn | Added +398.4k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.03% of their portfolio | 6.2m $1.2bn | Added +38.3k |
| Capital World Investors 0.12% of their portfolio | 5.2m $1.0bn | Reduced -463.7k |
| STATE STREET CORP 0.03% of their portfolio | 5.2m $1.0bn | Reduced -143.7k |
| Capital Research Global Investors 0.14% of their portfolio | 5.1m $1.0bn | Reduced -1.1m |
| FMR LLC 0.04% of their portfolio | 5.0m $983.4m | Reduced -258.0k |
| Capital International Investors 0.15% of their portfolio | 3.7m $733.2m | Reduced -2.2m |
| Invesco Ltd. 0.05% of their portfolio | 3.4m $679.9m | Reduced -406.4k |
| GEODE CAPITAL MANAGEMENT, LLC 0.03% of their portfolio | 2.8m $547.6m | Reduced -169.8k |
| Qube Research & Technologies Ltd 0.47% of their portfolio | 2.1m $422.6m | Added +1.3m |
| MORGAN STANLEY 0.02% of their portfolio | 1.9m $367.6m | Added +196.6k |
| BANK OF AMERICA CORP /DE/ 0.02% of their portfolio | 1.8m $348.3m | Added +402.1k |
| NORGES BANK 0.03% of their portfolio | 1.7m $342.9m | Not comparable |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.04% of their portfolio | 1.5m $292.3m | Reduced -18.9k |
| AQR CAPITAL MANAGEMENT LLC 0.10% of their portfolio | 1.4m $282.4m | Added +210.4k |
| JANE STREET GROUP, LLC 0.18% of their portfolio | 1.4m $278.1m | Reduced -80.3k |
| Assenagon Asset Management S.A. 0.17% of their portfolio | 1.3m $259.0m | Added +730.2k |
| NORTHERN TRUST CORP 0.03% of their portfolio | 1.3m $254.0m | Added +49.6k |
| Point72 Asset Management, L.P. 0.37% of their portfolio | 1.2m $244.5m | Reduced -692.2k |
| DIMENSIONAL FUND ADVISORS LP 0.04% of their portfolio | 1.2m $228.7m | Reduced -206.5k |
| VIKING GLOBAL INVESTORS LP 0.65% of their portfolio | 1.2m $227.4m | Reduced -2.2m |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.26% of their portfolio | 1.1m $220.9m | Added +88.2k |
| BOWEN HANES & CO INC 3.69% of their portfolio | 1.0m $151.7m | Unchanged |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.02% of their portfolio | 1.0m $201.4m | Added +693.1k |
| DENDUR CAPITAL LP 11.64% of their portfolio | 1.0m $198.9m | Reduced -274.1k |
| BESSEMER GROUP INC 0.26% of their portfolio | 955.0k $188.2m | Added +952.9k |
| BNP PARIBAS FINANCIAL MARKETS 0.10% of their portfolio | 922.9k $181.9m | Added +270.9k |
| VANGUARD FIDUCIARY TRUST CO 0.04% of their portfolio | 881.3k $173.7m | Added +36.9k |
| MILLENNIUM MANAGEMENT LLC 0.12% of their portfolio | 875.3k $172.5m | Added +256.0k |
| Fisher Asset Management, LLC 0.05% of their portfolio | 872.4k $171.9m | Reduced -52.1k |
| AMERIPRISE FINANCIAL INC 0.03% of their portfolio | 858.2k $169.2m | Reduced -140.6k |
| Bank of New York Mellon Corp 0.03% of their portfolio | 857.4k $169.0m | Reduced -11.8k |
| Artemis Investment Management LLP 1.48% of their portfolio | 841.5k $165.9m | Added +120.0k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.07% of their portfolio | 839.8k $165.5m | Reduced -363.9k |
| POLEN CAPITAL MANAGEMENT LLC 1.39% of their portfolio | 819.2k $161.5m | New |
| D. E. Shaw & Co., Inc. 0.10% of their portfolio | 815.6k $160.8m | Reduced -927.0k |
| AMERICAN CENTURY COMPANIES INC 0.07% of their portfolio | 765.8k $150.9m | Reduced -303.5k |
| GOLDMAN SACHS GROUP INC 0.02% of their portfolio | 751.3k $148.1m | Added +303.5k |
| Nuveen, LLC 0.03% of their portfolio | 737.1k $145.3m | Added +158.5k |
| MARSHALL WACE, LLP 0.12% of their portfolio | 709.6k $139.9m | Added +173.1k |
| RAYMOND JAMES FINANCIAL INC 0.04% of their portfolio | 667.7k $131.6m | Added +29.0k |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC 0.39% of their portfolio | 658.4k $129.8m | Reduced -124.1k |
| TWO SIGMA INVESTMENTS, LP 0.09% of their portfolio | 636.7k $125.5m | Added +618.9k |
| Freestone Grove Partners LP 0.76% of their portfolio | 587.1k $115.7m | Added +11.2k |
| LOOMIS SAYLES & CO L P 0.14% of their portfolio | 581.3k $114.6m | Reduced -72.1k |
| ALLIANCEBERNSTEIN L.P. 0.03% of their portfolio | 522.4k $76.0m | Reduced -53.2k |
| Balyasny Asset Management L.P. 0.19% of their portfolio | 514.1k $101.3m | Reduced -337.6k |
| Allspring Global Investments Holdings, LLC 0.15% of their portfolio | 502.0k $96.5m | Reduced -18.2k |
| Holocene Advisors, LP 0.22% of their portfolio | 497.6k $98.1m | Reduced -600.0k |
| CITADEL ADVISORS LLC 0.06% of their portfolio | 497.4k $98.0m | Added +194.1k |
| SG Americas Securities, LLC 0.06% of their portfolio | 489.5k $96.5m | Reduced -585.9k |
| WELLS FARGO & COMPANY/MN 0.02% of their portfolio | 483.7k $95.3m | Added +132.5k |
| FEDERATED HERMES, INC. 0.13% of their portfolio | 474.2k $93.5m | Reduced -71.4k |
| JPMORGAN CHASE & CO 0.01% of their portfolio | 465.6k $93.3m | Added +58.2k |
| UBS Group AG 0.01% of their portfolio | 464.7k $91.6m | Reduced -954.4k |
| 1832 Asset Management L.P. 0.11% of their portfolio | 459.5k $90.6m | Added +308.0k |
| NEUBERGER BERMAN GROUP LLC 0.06% of their portfolio | 450.3k $88.7m | Reduced -44.7k |
| Square Wave Capital, LLC 13.08% of their portfolio | 444.8k $87.7m | Added +78.4k |
| DSM CAPITAL PARTNERS LLC 1.49% of their portfolio | 441.0k $86.9m | New |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.02% of their portfolio | 428.3k $84.4m | Added +73.5k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.77% of their portfolio | 420.0k $82.8m | Reduced -274.5k |
| BANK OF NOVA SCOTIA 0.12% of their portfolio | 417.3k $82.2m | Reduced -49.9k |
| ENVESTNET ASSET MANAGEMENT INC 0.02% of their portfolio | 391.4k $77.1m | Added +175.6k |
| Amundi 0.02% of their portfolio | 388.6k $76.6m | Added +127.4k |
| RHUMBLINE ADVISERS 0.06% of their portfolio | 376.6k $74.2m | Added +22.2k |
| GAMCO INVESTORS, INC. ET AL 0.63% of their portfolio | 358.0k $70.6m | Reduced -3.5k |
| Thrivent Financial for Lutherans 0.11% of their portfolio | 338.6k $66.7m | Added +288.2k |
| ING GROEP NV 0.32% of their portfolio | 330.3k $65.1m | Reduced -47.2k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.04% of their portfolio | 321.5k $63.4m | Added +153.8k |
| PRINCIPAL FINANCIAL GROUP INC 0.03% of their portfolio | 308.4k $60.8m | Added +5.2k |
| Retirement Systems of Alabama 0.17% of their portfolio | 286.9k $56.5m | Reduced -25.4k |
| Clearbridge Investments, LLC 0.05% of their portfolio | 280.4k $55.3m | New |
| Swiss National Bank 0.03% of their portfolio | 276.4k $54.5m | Added +7.6k |
| Gotham Asset Management, LLC 0.12% of their portfolio | 269.6k $53.1m | Added +9.1k |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. 0.47% of their portfolio | 269.2k $53.1m | Reduced -113.2k |
| Allianz Asset Management GmbH 0.04% of their portfolio | 268.0k $39.2m | Added +198 |
| California Public Employees Retirement System 0.03% of their portfolio | 258.9k $51.0m | Added +5.1k |
| SEGALL BRYANT & HAMILL, LLC 0.57% of their portfolio | 242.6k $47.8m | Reduced -34.7k |
| ROYAL BANK OF CANADA 0.01% of their portfolio | 240.4k $47.4m | Added +69.4k |
| BLAIR WILLIAM & CO/IL 0.12% of their portfolio | 231.9k $45.7m | Reduced -5.0k |
| Capital International, Inc./CA/ 0.29% of their portfolio | 210.6k $41.5m | Reduced -24.3k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.03% of their portfolio | 207.9k $41.1m | Reduced -194.7k |
| KLCM Advisors, Inc. 3.28% of their portfolio | 207.5k $40.9m | Reduced -55.4k |
| LPL Financial LLC 0.01% of their portfolio | 205.8k $40.6m | Added +40.2k |
| Driehaus Capital Management LLC 0.23% of their portfolio | 205.1k $40.4m | Reduced -7.6k |
| HAWK RIDGE CAPITAL MANAGEMENT LP 1.29% of their portfolio | 204.7k $40.3m | Added +19.1k |
| JUPITER ASSET MANAGEMENT LTD 0.20% of their portfolio | 202.6k $39.9m | Reduced -139.1k |
| Legal & General Group Plc 0.01% of their portfolio | 199.4k $39.3m | Reduced -12.6k |
| CITIGROUP INC 0.02% of their portfolio | 192.2k $37.9m | Added +116.6k |
| PANAGORA ASSET MANAGEMENT INC 0.11% of their portfolio | 188.5k $37.2m | Added +23.0k |
| PRUDENTIAL FINANCIAL INC 0.04% of their portfolio | 181.3k $35.7m | Reduced -628.7k |
| Rokos Capital Management LLP 0.45% of their portfolio | 180.9k $35.7m | Added +100.6k |
| Yaupon Capital Management LP 1.18% of their portfolio | 180.2k $35.5m | New |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.05% of their portfolio | 178.9k $35.3m | Added +91.8k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.03% of their portfolio | 178.3k $35.1m | Added +142.9k |
| Schonfeld Strategic Advisors LLC 0.19% of their portfolio | 177.8k $35.0m | Added +154.2k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.07% of their portfolio | 174.6k $34.4m | Reduced -27.4k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 162.6k $32.0m | Added +54.7k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.03% of their portfolio | 158.4k $31.2m | Added +639 |