Equibles

ATI

Ati Inc

Company with tickers: ATI

CIK
1018963
CUSIP
01741R102
Shares Outstanding
136,470,427
Price History Institutional Holders Short Volume Short Interest Fails to Deliver Financials SEC Filings Earnings Calls Insider Trades Congressional Trades
Holders: 660
Total Value: $16,568,642,395
Total Shares: 113,905,148
Showing 1–100 of 692 holdings by value · page 1 of 7

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 660 13F filers · Δ vs Dec 31, 2025
Top Holder
14.4%
Jun 2023 → Mar 2026 · range 12.0% – 15.5%
−0.3 pts
Top 5
34.7%
Jun 2023 → Mar 2026 · range 34.7% – 46.9%
−8.2 pts
Top 10
50.0%
Jun 2023 → Mar 2026 · range 50.0% – 61.4%
−4.7 pts
HHI
395
Jun 2023 → Mar 2026 · range 395 – 594
Broadly held −122

Quarterly Activity

vs Dec 31, 2025
New
160
Increased
234
Decreased
193
Sold Out
63
Unchanged
73
Holder count: +97
Institutional value: +24.6%
Shares held: -1.7%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds
Mega Capital Research Global Investors +2,548,383 6,160,107
Mega BlackRock, Inc. +1,774,883 16,441,653
Mega MORGAN STANLEY +1,446,969 1,464,581
Mega JANE STREET GROUP, LLC +1,168,065 1,582,263
Large Point72 Asset Management, L.P. +1,143,802 1,944,079

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds
Mega Capital International Investors −11,211,854 5,883,949
Mega Capital World Investors −1,642,864 5,712,929
Mid NORTHERN TRUST CORP −1,173,667 450
Mega DIMENSIONAL FUND ADVISORS LP −759,172 1,366,804
Mid DENDUR CAPITAL LP −756,188 1,283,103

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD)
Large VIKING GLOBAL INVESTORS LP 3,332,843 $484,795,342
Mid Artemis Investment Management LLP 721,505 $104,950,117
Large Freestone Grove Partners LP 575,873 $83,766,486
Small Square Wave Capital, LLC 366,400 $53,296,544
Mid Aventail Capital Group, LP 185,312 $26,955,483

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD)
Mega NORGES BANK 1,732,195 $198,786,698
Mid MUFG Securities EMEA plc 277,000 $31,788,520
Mid Cartenna Capital, LP 260,000 $29,837,600
Large CIBC WORLD MARKETS CORP 177,444 $20,363,473
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC 175,732 $20,167,004
100 of 100 shown
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Action
Mega BlackRock, Inc. $2,391,602,835 14.43% 16,441,653 View
Mega Capital Research Global Investors $896,049,164 5.41% 6,160,107 View
Mega Capital International Investors $855,879,221 5.17% 5,883,949 View
Mega Capital World Investors $831,002,652 5.02% 5,712,929 View
Mega STATE STREET CORP $782,722,150 4.72% 5,381,013 View
Mega FMR LLC $763,254,072 4.61% 5,247,175 View
Mega Invesco Ltd. $560,841,825 3.38% 3,855,643 View
Large VIKING GLOBAL INVESTORS LP $484,795,342 2.93% 3,332,843 View
Mega GEODE CAPITAL MANAGEMENT, LLC $428,717,894 2.59% 2,947,325 View
Large Point72 Asset Management, L.P. $281,112,941 1.70% 1,932,579 View
Mega D. E. Shaw & Co., Inc. $253,479,904 1.53% 1,742,609 View
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $218,499,684 1.32% 1,502,129 View
Mega JANE STREET GROUP, LLC $216,919,115 1.31% 1,491,263 View
Mega MORGAN STANLEY $213,037,946 1.29% 1,464,581 View
Mega UBS Group AG $206,419,376 1.25% 1,419,080 View
Mega DIMENSIONAL FUND ADVISORS LP $198,815,307 1.20% 1,366,804 View
Mega BANK OF AMERICA CORP /DE/ $198,544,316 1.20% 1,364,941 View
Mid DENDUR CAPITAL LP $186,640,162 1.13% 1,283,103 View
Mega AQR CAPITAL MANAGEMENT LLC $177,836,484 1.07% 1,222,580 View
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $175,093,983 1.06% 1,203,726 View
Large Holocene Advisors, LP $159,655,150 0.96% 1,097,588 View
Large SG Americas Securities, LLC $156,423,029 0.94% 1,075,368 View
Mega AMERICAN CENTURY COMPANIES INC $155,537,759 0.94% 1,069,282 View
Mid BOWEN HANES & CO INC $151,730,053 0.92% 1,043,105 View
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. $150,227,305 0.91% 1,032,774 View
Mega AMERIPRISE FINANCIAL INC $145,290,392 0.88% 998,834 View
Mega Fisher Asset Management, LLC $134,480,824 0.81% 924,521 View
Mega Bank of New York Mellon Corp $126,431,498 0.76% 869,184 View
Large Qube Research & Technologies Ltd $124,923,666 0.75% 858,818 View
Large Balyasny Asset Management L.P. $123,883,045 0.75% 851,664 View
Mid PNC FINANCIAL SERVICES GROUP, INC. $120,984,318 0.73% 831,736 View
Large PRUDENTIAL FINANCIAL INC $117,818,236 0.71% 809,970 View
Large BARROW HANLEY MEWHINNEY & STRAUSS LLC $113,817,503 0.69% 782,466 View
Mid Artemis Investment Management LLP $104,950,117 0.63% 721,505 View
Mid FRONTIER CAPITAL MANAGEMENT CO LLC $101,010,624 0.61% 694,422 View
Large LOOMIS SAYLES & CO L P $95,045,890 0.57% 653,416 View
Mega BNP PARIBAS ARBITRAGE, SA $94,839,338 0.57% 651,996 View
Mega RAYMOND JAMES FINANCIAL INC $92,906,171 0.56% 638,706 View
Mega MILLENNIUM MANAGEMENT LLC $90,074,650 0.54% 619,240 View
Large Assenagon Asset Management S.A. $84,953,003 0.51% 584,030 View
Mega Nuveen, LLC $84,165,482 0.51% 578,616 View
Large Freestone Grove Partners LP $83,766,486 0.51% 575,873 View
Mega ALLIANCEBERNSTEIN L.P. $83,716,302 0.51% 575,528 View
Large FEDERATED HERMES, INC. $79,353,084 0.48% 545,532 View
Large MARSHALL WACE, LLP $78,036,089 0.47% 536,478 View
Large Allspring Global Investments Holdings, LLC $75,674,982 0.46% 520,246 View
Mega NEUBERGER BERMAN GROUP LLC $71,991,790 0.43% 494,925 View
Large BANK OF NOVA SCOTIA $67,951,493 0.41% 467,149 View
Mega GOLDMAN SACHS GROUP INC $65,139,750 0.39% 447,819 View
Mega JPMORGAN CHASE & CO $59,263,747 0.36% 407,423 View
Mega SCHRODER INVESTMENT MANAGEMENT GROUP $58,561,176 0.35% 402,593 View
Mid VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. $55,620,265 0.34% 382,375 View
Large ING GROEP NV $54,911,150 0.33% 377,500 View
Small Square Wave Capital, LLC $53,296,544 0.32% 366,400 View
Mid GAMCO INVESTORS, INC. ET AL $52,583,790 0.32% 361,500 View
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $51,600,041 0.31% 354,737 View
Mega RHUMBLINE ADVISERS $51,546,805 0.31% 354,371 View
Mega WELLS FARGO & COMPANY/MN $51,077,113 0.31% 351,142 View
Large JUPITER ASSET MANAGEMENT LTD $49,700,336 0.30% 341,677 View
Mega PRICE T ROWE ASSOCIATES INC /MD/ $47,817,356 0.29% 328,732 View
Large Retirement Systems of Alabama $45,425,267 0.27% 312,287 View
Mega CITADEL ADVISORS LLC $44,117,435 0.27% 303,296 View
Mega PRINCIPAL FINANCIAL GROUP INC $44,097,362 0.27% 303,158 View
Mid SEGALL BRYANT & HAMILL, LLC $40,346,385 0.24% 277,371 View
Mega Swiss National Bank $39,099,648 0.24% 268,800 View
Large Allianz Asset Management GmbH $38,959,132 0.24% 267,834 View
Large Jain Global LLC $38,470,678 0.23% 264,476 View
Mid KLCM Advisors, Inc. $38,232,560 0.23% 262,839 View
Mega Amundi $37,992,115 0.23% 261,186 View
Large Gotham Asset Management, LLC $37,890,584 0.23% 260,488 View
Mega California Public Employees Retirement System $36,917,311 0.22% 253,797 View
Large HRT FINANCIAL LP $36,786,543 0.22% 252,898 View
Large BLAIR WILLIAM & CO/IL $34,473,438 0.21% 236,996 View
Large Capital International, Inc./CA/ $34,172,626 0.21% 234,928 View
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $33,004,874 0.20% 226,900 View
Mega ENVESTNET ASSET MANAGEMENT INC $31,387,067 0.19% 215,778 View
Large Driehaus Capital Management LLC $30,944,287 0.19% 212,734 View
Mega Legal & General Group Plc $30,837,228 0.19% 211,998 View
Large STATE OF WISCONSIN INVESTMENT BOARD $29,377,537 0.18% 201,963 View
Mega CITADEL ADVISORS LLC $27,666,492 0.17% 190,200 View
Mid HAWK RIDGE CAPITAL MANAGEMENT LP $26,997,376 0.16% 185,600 View
Mid Aventail Capital Group, LP $26,955,483 0.16% 185,312 View
Large LORD, ABBETT & CO. LLC $26,480,847 0.16% 182,049 View
Mid EMERALD ADVISERS, LLC $26,398,808 0.16% 181,485 View
Large PEAK6 LLC $24,975,482 0.15% 171,700 View
Mega ROYAL BANK OF CANADA $24,877,876 0.15% 171,029 View
Mega CANADA PENSION PLAN INVESTMENT BOARD $24,397,423 0.15% 167,726 View
Mega LPL Financial LLC $24,083,812 0.15% 165,570 View
Large PANAGORA ASSET MANAGEMENT INC $24,078,139 0.15% 165,531 View
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM $22,947,915 0.14% 157,761 View
Large 1832 Asset Management L.P. $22,039,226 0.13% 151,514 View
Large Jain Global LLC $21,819,000 0.13% 150,000 View
Large Jain Global LLC $21,819,000 0.13% 150,000 View
Large Walleye Capital LLC $21,253,015 0.13% 146,109 View
Mid Senator Investment Group LP $21,091,700 0.13% 145,000 View
Large NEW YORK STATE TEACHERS RETIREMENT SYSTEM $19,585,025 0.12% 134,642 View
Large NATIXIS ADVISORS, LLC $18,077,332 0.11% 124,277 View
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $17,036,420 0.10% 117,121 View
Mid Sanctuary Advisors, LLC $16,817,503 0.10% 115,616 View
Large Russell Investments Group, Ltd. $15,891,356 0.10% 109,249 View
Page 1 of 7
Next »

Report a Problem

Category
Description
Email (optional, for follow-up)