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

AMT

Superinvestors

Institutional investors holding AMT

Consensus →
InvestorFundWeightSharesValueQuarter
William Von MuefflingCantillon Capital Management1.74%1,830,525$321.4M2025Q4
Chuck AkreAkre Capital Management0.49%255,267$44.8M2025Q4
Kenneth FisherFisher Asset Management0.11%1,779,533$312.4M2025Q4
Christopher DavisDavis Selected Advisers0.05%63,970$11.2M2025Q4
Meridian / ArrowMarkMeridian Contrarian Fund0.01%2,216$389K2025Q4
Mairs & PowerMairs & Power Growth Fund0.00%2,020$355K2025Q4

Congressional Activity

Congressional data coming soon

Insider Activity

1

Total trades

$22K

Volume

0

Buys

1

Sells

Last trade: Dec 28, 2020

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.