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ATI (ATI) Institutional Ownership

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$190.04 +2.06 (+1.10%)
Closing price 03:59 PM Eastern
Extended Trading
$191.92 +1.88 (+0.99%)
As of 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for ATI (NYSE:ATI)

Number of
Institutional Buyers
(last 12 months)
396
Total
Institutional Inflows
(last 12 months)
$7.29B
Number of
Institutional Sellers
(last 12 months)
213
Total
Institutional Outflows
(last 12 months)
$1.52B
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ATI Institutional Buying and Selling by Quarter

ATI Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
10/13/2026Fragasso Financial Advisors Inc6,907$1.33M0.1%+3.8%0.005%
10/13/2026NorthCrest Asset Manangement LLC3,094$582K0.0%+5.4%0.002%
10/9/2026GK Wealth Management LLC1,206$228K0.1%-43.0%0.001%
10/9/2026Wedmont Private Capital2,326$438K0.0%+5.8%0.002%
10/9/2026GAMMA Investing LLC6,192$1.17M0.0%+29.2%0.005%
10/8/2026Farther Finance Advisors LLC5,368$1.02M0.0%+23.4%0.004%
10/8/2026Artemis Investment Management LLP854,431$161.83M1.3%+1.5%0.627%
10/8/2026Fig Financial Advisory Services Inc. ADV6,121$1.16M0.7%N/A0.004%
10/7/2026Retirement Wealth Solutions LLC160$30K0.0%N/A0.000%
10/6/2026Central Pacific Bank Trust Division4,769$903K0.1%-24.4%0.004%
10/1/2026 Marathon Mission Inc.1,606$304K0.2%+7.9%0.001%
9/23/2026QRG Capital Management Inc.1,270$250K0.0%N/A0.001%
9/23/2026Envestnet Portfolio Solutions Inc.25,927$5.11M0.0%-10.5%0.019%
9/18/2026Security National Bank of Sioux City Iowa IA600$118K0.0%N/A0.000%
9/9/2026Sequoia Financial Advisors LLC33,554$6.61M0.0%+485.8%0.025%
9/9/2026Tidal Investments LLC91,436$18.02M0.0%-11.8%0.067%
9/9/2026Arlington Capital Management Inc.1,211$239K0.1%N/A0.001%
9/9/2026WINTON GROUP Ltd13,394$2.64M0.1%+50.5%0.010%
9/9/2026Engineers Gate Manager LP87,049$17.16M0.2%+26.3%0.064%
9/9/2026Integrated Wealth Concepts LLC5,890$1.16M0.0%+7.8%0.004%
9/9/2026NewEdge Advisors LLC5,967$1.18M0.0%+50.3%0.004%
9/9/2026Baird Financial Group Inc.1,779$351K0.0%-8.3%0.001%
9/8/2026Allworth Financial LP2,840$560K0.0%+15.7%0.002%
9/8/2026Arizona State Retirement System37,654$7.42M0.0%+0.9%0.028%
9/8/2026Waverly Advisors LLC44,418$8.76M0.1%-3.6%0.033%
9/8/2026Nykredit A S3,855$760K0.0%N/A0.003%
9/4/2026Parkside Financial Bank & Trust610$120K0.0%+28.4%0.000%
8/27/2026Corient Private Wealth LP78,728$15.52M0.0%+578.2%0.058%
8/26/2026Amundi388,616$76.60M0.0%+48.8%0.285%
8/26/2026HighTower Advisors LLC31,264$6.16M0.0%-8.2%0.023%
8/25/2026VIRGINIA RETIREMENT SYSTEMS ET Al23,828$4.70M0.0%N/A0.017%
8/23/2026Ameritas Advisory Services LLC1,658$327K0.0%N/A0.001%
8/23/2026Wedmont Private Capital2,198$411K0.0%+13.2%0.002%
8/23/2026HB Wealth Management LLC4,979$981K0.0%+20.9%0.004%
8/23/2026Nilsine Partners LLC25,713$5.07M0.4%+2.7%0.019%
8/23/2026Angeles Wealth Management LLC1,220$240K0.0%N/A0.001%
8/22/2026AlphaGrep UK Ltd4,725$931K0.3%N/A0.003%
8/22/2026Oakmont Investment Advisors Inc.5,371$1.06M0.7%N/A0.004%
8/22/2026Three Seasons Wealth LLC1,190$235K0.0%N/A0.001%
8/22/2026TD Waterhouse Canada Inc.2,515$483K0.0%-67.1%0.002%
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8/22/2026Concurrent Investment Advisors LLC6,808$1.34M0.0%+9.8%0.005%
8/21/2026AXQ Capital LP18,637$3.67M0.4%-14.1%0.014%
8/21/2026Greenspring Advisors LLC1,172$231K0.0%N/A0.001%
8/21/2026Nykredit A S3,855$760K0.0%N/A0.003%
8/21/2026Triumph Capital Management317$62K0.0%+22.4%0.000%
8/20/2026Headlands Technologies LLC8,300$1.64M0.2%+152.5%0.006%
8/20/2026Senator Investment Group LP80,000$15.77M0.6%-44.8%0.059%
8/20/2026Quantitative Investment Management LLC1,953$384K0.0%-9.5%0.001%
8/20/2026Susquehanna Fundamental Investments LLC95,495$18.82M0.4%+15.4%0.070%
8/20/2026Moore Capital Management LP30,927$6.10M0.1%-8.8%0.023%
8/20/2026Sigma Planning Corp4,934$972K0.0%-53.1%0.004%
8/20/2026Two Sigma Securities LLC2,646$522K0.0%-40.9%0.002%
8/20/2026Cookson Peirce & Co. Inc.45,845$9.04M0.3%+58.4%0.034%
8/20/2026Northwestern Mutual Wealth Management Co.78,629$15.50M0.0%-0.9%0.058%
8/20/2026Rational Advisors Inc.14,100$2.78M0.3%+104.3%0.010%
8/20/2026Greenleaf Trust1,286$253K0.0%N/A0.001%
8/19/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC428,271$84.41M0.0%+20.7%0.315%
8/19/2026Toth Financial Advisory Corp5,609$1.11M0.1%+124.4%0.004%
8/19/2026Van ECK Associates Corp27,953$5.51M0.0%N/A0.021%
8/19/2026Hsbc Holdings PLC65,083$12.82M0.0%+126.1%0.048%
8/19/2026Wellington Management Group LLP81,401$16.04M0.0%+7.5%0.060%
8/19/2026Archer Investment Corp1,510$298K0.0%N/A0.001%
8/18/2026Beacon Pointe Advisors LLC1,680$331K0.0%N/A0.001%
8/18/2026Empowered Funds LLC91,374$18.01M0.1%N/A0.067%
8/18/2026United Capital Financial Advisors LLC1,687$333K0.0%N/A0.001%
8/18/2026Public Employees Retirement System of Ohio40,142$7.91M0.0%N/A0.029%
8/17/2026Capstone Investment Advisors LLC10,849$2.14M0.0%N/A0.008%
8/17/2026Corient Private Wealth LP67,987$13.40M0.0%N/A0.050%
8/17/2026Ausdal Financial Partners Inc.2,127$419K0.0%N/A0.002%
8/17/2026Bank of America Corp DE1,767,047$348.29M0.0%N/A1.298%
8/15/2026Freestone Grove Partners LP587,093$115.72M0.7%N/A0.431%
8/15/2026Caisse de depot et placement du Quebec1,800$355K0.0%N/A0.001%
8/15/2026Man Group plc59,556$11.74M0.0%N/A0.044%
8/15/2026Jupiter Topco LLC60,508$11.92M0.0%N/A0.044%
8/14/2026Hsbc Holdings PLC65,083$12.82M0.0%N/A0.048%
8/14/2026EFG International AG719$142K0.0%N/A0.001%
8/14/2026Expect Equity LLC22,645$4.46M2.9%N/A0.017%
8/14/2026Canada Pension Plan Investment Board321,526$63.37M0.0%N/A0.236%
8/14/2026Castleark Management LLC4,830$952K0.0%N/A0.004%
8/14/2026Legal & General Group Plc199,420$39.31M0.0%N/A0.146%
8/14/2026The Manufacturers Life Insurance Company64,289$12.67M0.0%N/A0.047%
8/14/2026S Squared Technology LLC40,000$7.88M0.0%N/A0.029%
8/14/2026Marathon Partners Equity Management LLC6,000$1.18M1.1%N/A0.004%
8/14/2026Cetera Trust Company N.A6,548$1.29M0.6%N/A0.005%
8/14/2026Paradigm Capital Management Inc. NY18,000$3.55M0.1%N/A0.013%
8/14/2026Algert Global LLC112,780$22.23M0.3%+5.2%0.083%
8/13/2026Gallo Partners LP2,974$586K1.3%N/A0.002%
8/13/2026Cibc World Market Inc.1,043$206K0.0%N/A0.001%
8/13/2026Tribune Investment Group LP29,380$5.79M2.3%-8.2%0.022%
8/13/2026Sanctuary Advisors LLC117,432$23.15M0.1%N/A0.086%
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8/13/2026Connor Clark & Lunn Investment Management Ltd.21,561$4.25M0.0%N/A0.016%
8/13/2026Meiji Yasuda Asset Management Co Ltd.3,159$623K0.0%N/A0.002%
8/13/2026Barrow Hanley Mewhinney & Strauss LLC658,413$129.77M0.4%N/A0.484%
8/13/2026Globeflex Capital L P67,186$13.24M1.7%N/A0.049%
8/13/2026Bank of Nova Scotia417,290$82.25M0.1%N/A0.306%
8/12/2026Commerce Bank2,117$417K0.0%N/A0.002%
8/12/2026Pinnbrook Capital Management LP82,081$16.18M1.7%N/A0.060%
8/12/2026Northwestern Mutual Wealth Management Co.78,629$15.50M0.0%N/A0.058%
8/12/2026Quantbot Technologies LP27,156$5.35M0.2%N/A0.020%
8/12/2026Emerald Investment Advisers LLC4,468$881K0.1%N/A0.003%


ATI Institutional Ownership - Frequently Asked Questions

During the previous two years, 629 institutional investors and hedge funds held shares of ATI. The most heavily invested institutionals were BlackRock Inc. ($3.69B), Capital International Investors ($1.96B), Vanguard Group Inc. ($1.46B), Capital World Investors ($844.15M), State Street Corp ($642.57M), Capital Research Global Investors ($414.48M), and Invesco Ltd. ($388.45M).Learn more on ATI's institutional investors.

Of the 565 institutional investors that purchased ATI's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: BlackRock Inc. ($18.71M), Mountaineer Partners Management LLC ($9.26M), Norges Bank ($4.98M), Capital World Investors ($4.53M), Dendur Capital LP ($3.06M), Bank of America Corp DE ($2.44M), and Vanguard Group Inc. ($2.02M).

Institutional investors have bought a total of 46,046,646 shares in the last 24 months. This purchase volume represents approximately $7.29B in transactions.

Of the 213 institutional investors that sold ATI's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Royal Bank of Canada ($1.21M), Channing Capital Management LLC ($1.00M), Ameriprise Financial Inc. ($795.00K), Dimensional Fund Advisors LP ($775.20K), Dendur Capital LP ($649.87K), Voloridge Investment Management LLC ($646.96K), and Vanguard Group Inc. ($603.95K).

Institutional investors have sold a total of 13,793,348 shares in the last 24 months. This volume of shares sold represents approximately $1.52B in transactions.


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Institutional ownership data for NYSE:ATI is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 10/13/2026. New 13F filings are added each quarter as they're published.
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