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© 2026 DataHeimdall. All rights reserved.Data sourced from SEC EDGAR public filings.
Insider Trades

ATI

ATI INC

Superinvestors

Institutional investors holding ATI

Consensus →
InvestorFundWeightSharesValueQuarter
Mario CibelliMarathon Partners2.88%17,500$2.5M2026Q1
Viking Global InvestorsViking Global Investors1.36%3,332,843$484.8M2026Q1
Alex RoepersAtlantic Investment Management0.31%50,000$1.0M2019Q4
Meridian / ArrowMarkMeridian Contrarian Fund0.15%12,200$673K2010Q4
Christopher DavisDavis Selected Advisers0.06%825,049$13.4M2016Q1
Kenneth FisherFisher Asset Management0.05%924,521$134.5M2026Q1
First Eagle Investment ManagementFirst Eagle Investment Management0.00%27,298$733K2022Q1

Congressional Activity

Congressional data coming soon

Insider Activity

16

Total trades

$6.4M

Volume

9

Buys

7

Sells

Last trade: May 19, 2026

Insider Tradeslast 90 days

DateInsiderTypeValue
May 19, 2026Jean Lydon-RodgersBuy–
May 19, 2026Jean Lydon-RodgersBuy–

Congressional Tradeslast 90 days

Congressional trade data is being sourced and will appear here shortly.

May 19, 2026
Jean Lydon-Rodgers
Buy
–
May 19, 2026Jean Lydon-RodgersBuy–
May 19, 2026Jean Lydon-RodgersBuy–
May 19, 2026Jean Lydon-RodgersBuy–
May 19, 2026Jean Lydon-RodgersBuy–
May 19, 2026Jean Lydon-RodgersBuy–
May 19, 2026Jean Lydon-RodgersBuy–
May 11, 2026Jean Lydon-RodgersSell$200K
May 11, 2026Jean Lydon-RodgersSell$870K
May 11, 2026Jean Lydon-RodgersSell$528K
May 11, 2026Jean Lydon-RodgersSell$1.0M
May 11, 2026Jean Lydon-RodgersSell$414K
May 11, 2026Jean Lydon-RodgersSell$1.9M
May 11, 2026Jean Lydon-RodgersSell$1.4M