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ATI (ATI) Institutional Ownership

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$222.57 +17.46 (+8.51%)
Closing price 08/6/2026 03:59 PM Eastern
Extended Trading
$226.16 +3.59 (+1.61%)
As of 07:34 AM 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)
385
Total
Institutional Inflows
(last 12 months)
$2.93B
Number of
Institutional Sellers
(last 12 months)
227
Total
Institutional Outflows
(last 12 months)
$2.09B
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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
8/7/2026Mitsubishi UFJ Asset Management Co. Ltd.369$73K0.0%N/A0.000%
8/7/2026OneDigital Investment Advisors LLC1,214$239K0.0%N/A0.001%
8/7/2026Old West Investment Management LLC12,555$2.48M0.3%N/A0.009%
8/6/2026Global Retirement Partners LLC3,989$786K0.0%N/A0.003%
8/6/2026Bank of New York Mellon Corp857,414$169.00M0.0%N/A0.628%
8/6/2026Focus Partners Advisor Solutions LLC3,438$678K0.0%N/A0.003%
8/6/2026State of Wyoming6,652$1.31M0.1%N/A0.005%
8/6/2026Mivtachim The Workers Social Insurance Fund Ltd. Under Special Management 24,000$4.73M0.6%N/A0.018%
8/6/2026GSA Capital Partners LLP8,292$1.63M0.1%N/A0.006%
8/5/2026USA Financial Formulas992$144K0.0%N/A0.001%
8/3/2026 Oppenheimer Asset Management Inc.14,532$2.86M0.0%N/A0.011%
7/20/2026 Graphene Investments SAS16,800$3.31M1.9%-15.6%0.012%
7/10/2026 Tema ETFs LLC72,045$14.20M0.5%-11.3%0.053%
7/9/2026 Arista Wealth Management LLC5,753$1.13M0.1%-37.6%0.004%
7/9/2026 Hennion & Walsh Asset Management Inc.36,829$7.26M0.2%+18.0%0.027%
7/8/2026 Thurston Springer Miller Herd & Titak Inc.2,886$569K0.2%N/A0.002%
7/8/2026 Assenagon Asset Management S.A.657,117$129.52M0.2%+12.5%0.482%
7/8/2026 55 North Private Wealth LLC1,195$236K0.0%N/A0.001%
7/7/2026 Dynamic Advisor Solutions LLC1,207$238K0.0%N/A0.001%
7/7/2026 GK Wealth Management LLC2,115$417K0.2%N/A0.002%
7/7/2026 GAMMA Investing LLC4,793$945K0.0%+23.0%0.004%
7/7/2026 Harbor Investment Advisory LLC581$115K0.0%N/A0.000%
7/7/2026 CoreCap Advisors LLC154$30K0.0%N/A0.000%
6/18/2026Pacer Advisors Inc.21,679$3.15M0.0%-64.5%0.016%
6/16/2026 PVG Asset Management Corp10,475$1.52M1.1%N/A0.008%
6/16/2026Empowered Funds LLC55,970$8.14M0.1%+304.6%0.041%
6/3/2026DV Trading LLC1,600$233K0.0%+100.0%0.001%
6/3/2026NewEdge Advisors LLC3,969$577K0.0%+3,869.0%0.003%
6/2/2026Optiver Holding B.V.1,226$178K0.0%N/A0.001%
5/22/2026Segall Bryant & Hamill LLC277,371$40.35M0.5%-13.8%0.203%
5/19/2026Dayah Capital LLC9,842$1.43M0.5%-34.4%0.007%
5/19/2026Bank of America Corp DE1,364,941$198.54M0.0%+70.8%1.000%
5/19/2026Edgestream Partners L.P.9,517$1.38M0.0%+17.2%0.007%
5/19/2026Bull Harbor Capital LLC2,686$391K0.1%N/A0.002%
5/19/2026Strategic Investment Advisors MI1,214$177K0.0%N/A0.001%
5/19/2026South Dakota Investment Council5,300$771K0.0%N/A0.004%
5/18/2026Amundi261,186$37.99M0.0%+775.0%0.191%
5/18/2026 EverSource Wealth Advisors LLC3,756$546K0.0%-2.9%0.003%
5/18/2026California State Teachers Retirement System157,761$22.95M0.0%+21.0%0.116%
5/18/2026Royal Bank of Canada171,029$24.88M0.0%+124.3%0.125%
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5/18/2026Rokos Capital Management LLP80,343$11.68M0.1%N/A0.059%
5/18/2026Empowered Funds LLC55,970$8.14M0.1%+304.6%0.041%
5/16/2026The Manufacturers Life Insurance Company69,568$10.12M0.0%-25.8%0.051%
5/16/2026Hawk Ridge Capital Management LP185,600$27.00M1.0%-11.4%0.136%
5/16/2026Quantinno Capital Management LP40,458$5.89M0.0%+22.7%0.030%
5/16/2026Lazard Asset Management LLC24,105$3.51M0.0%+281.4%0.018%
5/15/2026 Gateway Wealth Partners LLC3,439$500K0.0%N/A0.003%
5/15/2026Waverly Advisors LLC46,082$6.70M0.1%-23.0%0.034%
5/15/2026Epoch Investment Partners Inc.85,601$12.45M0.1%-5.2%0.063%
5/15/2026Entropy Technologies LP19,026$2.77M0.1%N/A0.014%
5/14/2026Healthcare of Ontario Pension Plan Trust Fund87,042$12.66M0.0%+62.8%0.064%
5/14/2026Gabelli Funds LLC15,316$2.23M0.0%+11.8%0.011%
5/14/2026Gamco Investors INC. ET AL361,500$52.58M0.5%-5.6%0.265%
5/14/2026Public Employees Retirement System of Ohio39,930$5.81M0.0%-3.5%0.029%
5/14/2026 Compound Planning Inc.2,378$346K0.0%+15.5%0.002%
5/14/2026Arrowstreet Capital Limited Partnership1,203,726$175.09M0.1%+231.4%0.882%
5/14/2026Inceptionr LLC1,546$225K0.1%-40.9%0.001%
5/14/2026Bowen Hanes & Co. Inc.1,043,105$151.73M3.7%-11.4%0.764%
5/14/2026Bank of Nova Scotia467,149$67.95M0.1%+92.9%0.342%
5/14/2026Sei Investments Co.90,045$13.10M0.0%-24.7%0.066%
5/14/2026Lido Advisors LLC5,110$743K0.0%+29.0%0.004%
5/14/2026State of Wyoming2,882$419K0.0%-44.8%0.002%
5/13/2026Cetera Investment Advisers26,675$3.88M0.0%+75.7%0.020%
5/13/2026 Signature Equity Partners LLC182$26K0.0%+208.5%0.000%
5/13/2026NewEdge Wealth LLC2,857$416K0.0%+41.2%0.002%
5/13/2026 First Citizens Bank & Trust Co.6,630$964K0.0%-1.4%0.005%
5/13/2026First Trust Advisors LP93,147$13.55M0.0%+14.6%0.068%
5/8/2026PNC Financial Services Group Inc.831,736$120.98M0.1%+1,714.0%0.609%
5/8/2026HORAN Wealth LLC1,400$204K0.0%N/A0.001%
5/8/2026 Wilkerson Advisory Group LLC1,474$214K0.1%N/A0.001%
5/7/2026Basepoint Wealth LLC5,414$788K0.5%-3.5%0.004%
5/7/2026Hollencrest Capital Management452$66K0.0%+283.1%0.000%
5/7/2026Meeder Asset Management Inc.2,754$401K0.0%+2.8%0.002%
5/7/2026Dimensional Fund Advisors LP1,366,804$198.72M0.0%-35.7%1.002%
5/7/2026Little House Capital LLC14,447$2.10M0.5%N/A0.011%
5/7/2026Swiss National Bank268,800$39.10M0.0%-1.1%0.197%
5/7/2026Precision Wealth Strategies LLC6,939$1.01M0.3%N/A0.005%
5/6/2026Freemont Management S.A.27,300$3.97M0.6%+37.2%0.020%
5/6/2026California Public Employees Retirement System253,797$36.92M0.0%-0.4%0.186%
5/6/2026 Graphene Investments SAS19,900$2.90M1.9%-29.9%0.015%
5/6/2026Bessemer Group Inc.2,106$306K0.0%+10.3%0.002%
5/6/2026Allspring Global Investments Holdings LLC520,246$78.69M0.1%-13.8%0.381%
5/5/2026 D.A. Davidson & CO.9,355$1.36M0.0%+29.9%0.007%
5/5/2026Bank of New York Mellon Corp869,184$126.43M0.0%-4.8%0.637%
5/5/2026Illinois Municipal Retirement Fund7,601$1.11M0.0%N/A0.006%
5/5/2026Sanctuary Advisors LLC115,616$16.82M0.1%-14.5%0.085%
5/5/2026Sigma Planning Corp10,517$1.53M0.0%N/A0.008%
5/5/2026 Avantax Planning Partners Inc.1,678$244K0.0%N/A0.001%
5/4/2026 Emerald Mutual Fund Advisers Trust93,847$13.65M0.7%-48.9%0.069%
5/4/2026 Emerald Advisers LLC181,485$26.40M0.8%-41.0%0.133%
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5/4/2026 Archer Investment Corp1,510$220K0.0%N/A0.001%
5/4/2026 State of Michigan Retirement System32,700$4.76M0.0%+1.9%0.024%
5/4/2026 Principal Financial Group Inc.303,158$44.10M0.0%+3.8%0.222%
5/4/2026 Chicago Partners Investment Group LLC2,034$312K0.0%N/A0.001%
5/4/2026 Y.D. More Investments Ltd4,725$687K0.0%N/A0.003%
5/2/2026 Carnegie Investment Counsel2,136$311K0.0%-60.7%0.002%
5/1/2026 Fifth Third Bancorp48,899$7.11M0.0%+3,506.1%0.036%
5/1/2026American Trust2,238$326K0.0%-41.4%0.002%
5/1/2026 Sequoia Financial Advisors LLC5,728$833K0.0%-17.9%0.004%
4/30/2026Hsbc Holdings PLC28,788$4.16M0.0%-68.3%0.021%


ATI Institutional Ownership - Frequently Asked Questions

During the previous two years, 597 institutional investors and hedge funds held shares of ATI. The most heavily invested institutionals were 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), Invesco Ltd. ($388.45M), and FMR LLC ($364.47M).Learn more on ATI's institutional investors.

Of the 537 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: Mountaineer Partners Management LLC ($9.26M), Norges Bank ($4.98M), Capital World Investors ($4.53M), Dendur Capital LP ($3.06M), Vanguard Group Inc. ($2.02M), Holocene Advisors LP ($1.82M), and Forest Avenue Capital Management LP ($1.29M).

Institutional investors have bought a total of 26,663,189 shares in the last 24 months. This purchase volume represents approximately $2.93B in transactions.

Of the 227 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: Channing Capital Management LLC ($1.73M), Invesco Ltd. ($1.70M), Ameriprise Financial Inc. ($1.60M), Royal Bank of Canada ($1.21M), Vanguard Group Inc. ($1.17M), Dendur Capital LP ($1.04M), and Dimensional Fund Advisors LP ($775.20K).

Institutional investors have sold a total of 20,592,046 shares in the last 24 months. This volume of shares sold represents approximately $2.09B 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 8/7/2026. New 13F filings are added each quarter as they're published.
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