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Financial transparency data from public SEC filings.

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

AT

Superinvestors

Institutional investors holding AT

Consensus →
InvestorFundWeightSharesValueQuarter
Viking Global InvestorsViking Global Investors3.18%2,216,800$137.4M2007Q1
David TepperAppaloosa Management0.32%139,100$9.7M2007Q3
Mason HawkinsLongleaf Partners – Southeastern Asset Management0.16%547,900$30.1M2005Q1
Bill NygrenOakmark Select Fund – Harris Associates0.02%4,179$258K2001Q4
Ruane CunniffSequoia Fund0.01%10,000$522K2000Q3
Kenneth FisherFisher Asset Management0.01%34,041$2.4M2007Q3
Dodge & CoxDodge & Cox0.00%11,906$690K2001Q3
Jensen Investment ManagementJensen Investment Management0.00%3,400$237K2007Q3
Christopher DavisDavis Selected Advisers0.00%0$572K2007Q3

Congressional Activity

Congressional data coming soon

Insider Activity

No insider trades in the last 90 days

Insider Tradeslast 90 days

No insider trades in the last 90 days.

Congressional Tradeslast 90 days

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