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ATI (ATI) Institutional Ownership

ATI logo
$162.33 +0.04 (+0.02%)
Closing price 05/22/2026 03:59 PM Eastern
Extended Trading
$160.21 -2.12 (-1.31%)
As of 05/22/2026 07:53 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)
394
Total
Institutional Inflows
(last 12 months)
$2.75B
Number of
Institutional Sellers
(last 12 months)
233
Total
Institutional Outflows
(last 12 months)
$2.15B
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Skip Chart & View Institutional Buying and Selling Data

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
5/22/2026 Segall Bryant & Hamill LLC277,371$40.35M0.5%-13.8%0.203%
5/19/2026 Dayah Capital LLC9,842$1.43M0.5%-34.4%0.007%
5/19/2026 Bank of America Corp DE1,364,941$198.54M0.0%+70.8%1.000%
5/19/2026 Edgestream Partners L.P.9,517$1.38M0.0%+17.2%0.007%
5/19/2026 Bull Harbor Capital LLC2,686$391K0.1%N/A0.002%
5/19/2026 Strategic Investment Advisors MI1,214$177K0.0%N/A0.001%
5/19/2026 South Dakota Investment Council5,300$771K0.0%N/A0.004%
5/18/2026 Amundi261,186$37.99M0.0%+775.0%0.191%
5/18/2026 EverSource Wealth Advisors LLC3,756$546K0.0%-2.9%0.003%
5/18/2026 California State Teachers Retirement System157,761$22.95M0.0%+21.0%0.116%
5/18/2026 Royal Bank of Canada171,029$24.88M0.0%+124.3%0.125%
5/18/2026 Rokos Capital Management LLP80,343$11.68M0.1%N/A0.059%
5/18/2026 Empowered Funds LLC55,970$8.14M0.1%+304.6%0.041%
5/16/2026 The Manufacturers Life Insurance Company 69,568$10.12M0.0%-25.8%0.051%
5/16/2026 Hawk Ridge Capital Management LP185,600$27.00M1.0%-11.4%0.136%
5/16/2026 Quantinno Capital Management LP40,458$5.89M0.0%+22.7%0.030%
5/16/2026 Lazard Asset Management LLC24,105$3.51M0.0%+281.4%0.018%
5/15/2026 Gateway Wealth Partners LLC3,439$500K0.0%N/A0.003%
5/15/2026 Waverly Advisors LLC46,082$6.70M0.1%-23.0%0.034%
5/15/2026 Epoch Investment Partners Inc.85,601$12.45M0.1%-5.2%0.063%
5/15/2026 Entropy Technologies LP19,026$2.77M0.1%N/A0.014%
5/14/2026 Healthcare of Ontario Pension Plan Trust Fund87,042$12.66M0.0%+62.8%0.064%
5/14/2026 Gabelli Funds LLC15,316$2.23M0.0%+11.8%0.011%
5/14/2026 Gamco Investors INC. ET AL361,500$52.58M0.5%-5.6%0.265%
5/14/2026 Public 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%
5/14/2026 Arrowstreet Capital Limited Partnership1,203,726$175.09M0.1%+231.4%0.882%
5/14/2026 Inceptionr LLC1,546$225K0.1%-40.9%0.001%
5/14/2026 Bowen Hanes & Co. Inc.1,043,105$151.73M3.7%-11.4%0.764%
5/14/2026 Bank of Nova Scotia467,149$67.95M0.1%+92.9%0.342%
5/14/2026 Sei Investments Co.90,045$13.10M0.0%-24.7%0.066%
5/14/2026 Lido Advisors LLC5,110$743K0.0%+29.0%0.004%
5/14/2026 State of Wyoming2,882$419K0.0%-44.8%0.002%
5/13/2026 Cetera Investment Advisers26,675$3.88M0.0%+75.7%0.020%
5/13/2026 Signature Equity Partners LLC182$26K0.0%+208.5%0.000%
5/13/2026 NewEdge 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%
5/13/2026 First Trust Advisors LP93,147$13.55M0.0%+14.6%0.068%
5/8/2026 PNC Financial Services Group Inc.831,736$120.98M0.1%+1,714.0%0.609%
5/8/2026 HORAN Wealth LLC1,400$204K0.0%N/A0.001%
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5/8/2026 Wilkerson Advisory Group LLC1,474$214K0.1%N/A0.001%
5/7/2026 Basepoint Wealth LLC5,414$788K0.5%-3.5%0.004%
5/7/2026 Hollencrest Capital Management452$66K0.0%+283.1%0.000%
5/7/2026 Meeder Asset Management Inc.2,754$401K0.0%+2.8%0.002%
5/7/2026 Dimensional Fund Advisors LP1,366,804$198.72M0.0%-35.7%1.002%
5/7/2026 Little House Capital LLC14,447$2.10M0.5%N/A0.011%
5/7/2026 Swiss National Bank268,800$39.10M0.0%-1.1%0.197%
5/7/2026 Precision Wealth Strategies LLC6,939$1.01M0.3%N/A0.005%
5/6/2026 Freemont Management S.A.27,300$3.97M0.6%+37.2%0.020%
5/6/2026 California 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%
5/6/2026 Bessemer Group Inc.2,106$306K0.0%+10.3%0.002%
5/6/2026 Allspring 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%
5/5/2026 Bank of New York Mellon Corp869,184$126.43M0.0%-4.8%0.637%
5/5/2026 Illinois Municipal Retirement Fund7,601$1.11M0.0%N/A0.006%
5/5/2026 Sanctuary Advisors LLC115,616$16.82M0.1%-14.5%0.085%
5/5/2026 Sigma 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%
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%
5/1/2026 American Trust2,238$326K0.0%-41.4%0.002%
5/1/2026 Sequoia Financial Advisors LLC5,728$833K0.0%-17.9%0.004%
4/30/2026 Hsbc Holdings PLC28,788$4.16M0.0%-68.3%0.021%
4/30/2026 Summit Securities Group LLC413$60K0.0%N/A0.000%
4/30/2026 Kestra Advisory Services LLC2,822$410K0.0%+28.7%0.002%
4/30/2026 Oregon Public Employees Retirement Fund27,835$4.05M0.1%+2.7%0.020%
4/29/2026 Kiley Juergens Wealth Management LLC1,998$291K0.1%N/A0.001%
4/28/2026 Stephens Inc. AR2,267$330K0.0%N/A0.002%
4/28/2026 Praxis Investment Management Inc.4,865$708K0.0%-40.1%0.004%
4/27/2026 HB Wealth Management LLC4,118$599K0.0%+27.8%0.003%
4/27/2026 World Investment Advisors3,783$550K0.0%+59.2%0.003%
4/27/2026 New York State Teachers Retirement System134,642$19.59M0.0%-9.0%0.099%
4/27/2026 Private Advisor Group LLC2,422$352K0.0%N/A0.002%
4/27/2026 Y Intercept Hong Kong Ltd31,620$4.60M0.1%N/A0.023%
4/25/2026 Keybank National Association OH5,825$847K0.0%-36.1%0.004%
4/24/2026 Root Financial Partners LLC862$125K0.0%+234.1%0.001%
4/24/2026 Capital Asset Advisory Services LLC1,475$215K0.0%N/A0.001%
4/23/2026 Inspire Investing LLC11,098$1.61M0.1%-4.0%0.008%
4/23/2026 Networth Advisors LLC1,464$213K0.2%+29.4%0.001%
4/23/2026 Apollon Wealth Management LLC3,635$529K0.0%+15.9%0.003%
4/22/2026 Janney Montgomery Scott LLC33,437$4.86M0.0%-14.3%0.025%
4/22/2026 1492 Capital Management LLC41,865$6.09M2.3%-1.0%0.031%
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4/22/2026 Pictet Asset Management Holding SA22,141$3.22M0.0%+6.7%0.016%
4/21/2026 SmartHarvest Portfolios LLC1,712$249K0.1%N/A0.001%
4/21/2026 Louisiana State Employees Retirement System39,400$5.73M0.1%N/A0.029%
4/21/2026 Fairvoy Private Wealth LLC6,043$879K0.2%N/A0.004%
4/20/2026 Kestra Private Wealth Services LLC13,011$1.89M0.0%+33.4%0.010%
4/20/2026 Friedenthal Financial6,741$981K0.5%N/A0.005%
4/20/2026 Trust Co. of Oklahoma3,011$438K0.1%N/A0.002%
4/20/2026 Fifth Third Wealth Advisors LLC4,941$719K0.0%+24.3%0.004%
4/20/2026 OP Asset Management Ltd22,985$3.34M0.0%N/A0.017%
4/20/2026 Assenagon Asset Management S.A.584,030$84.95M0.1%+2,162.1%0.428%


ATI Institutional Ownership - Frequently Asked Questions

During the previous two years, 589 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 530 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 26,002,811 shares in the last 24 months. This purchase volume represents approximately $2.75B in transactions.

Of the 233 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 21,276,069 shares in the last 24 months. This volume of shares sold represents approximately $2.15B in transactions.


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This page (NYSE:ATI) was last updated on 5/25/2026 by MarketBeat.com Staff.
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