AMETEK INC (AME) Stock Institutional Trading Activity


AMETEK INC (AME) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Giverny Capital, ARK Invest, Sequoia Financial Advisors, and Bares Capital Management. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2022Sequoia Financial AdvisorsBuy7002,379$316
Q1 2022Renaissance Technologies LLCBuy101,800437,150$58,220
Q1 2022Giverny CapitalBuy12,485805,918$107,332
Q4 2021ARK InvestSell-4,18140,524$5,959
Q4 2021Mairs & Power Growth FundSell-9401,471$216
Q4 2021Sequoia Financial AdvisorsBuy1,6791,679$247
Q4 2021Renaissance Technologies LLCBuy54,900335,350$49,310
Q4 2021Giverny CapitalBuy27,184793,433$116,666
Q3 2021ARK InvestSell-8,63944,705$5,544
Q3 2021Renaissance Technologies LLCBuy119,200280,450$34,779
Q3 2021Giverny CapitalBuy25,406766,249$95,023
Q2 2021ARK InvestSell-3,00353,344$7,121
Q2 2021Giverny CapitalBuy22,889740,843$98,903
Q1 2021ARK InvestBuy43,72656,347$7,197
Q1 2021Renaissance Technologies LLCBuy145,000161,250$20,596
Q1 2021Giverny CapitalBuy5,417717,954$91,704
Q4 2020ARK InvestBuy6,32112,621$1,526
Q4 2020Mairs & Power Growth FundSell-2892,411$292
Q4 2020Giverny CapitalSell-43,389712,537$86,174
Q3 2020ARK InvestBuy1,2276,300$626
Q3 2020Giverny CapitalBuy8,323755,926$75,139
Q2 2020ARK InvestBuy9895,073$453
Q2 2020Mairs & Power Growth FundSell-382,700$241
Q2 2020Renaissance Technologies LLCSell-82,00116,250$1,452
Q2 2020Giverny CapitalBuy19,909747,603$66,813
Q1 2020ARK InvestSell-5374,084$294
Q1 2020Renaissance Technologies LLCSell-112,39998,251$7,076
Q1 2020Giverny CapitalSell-105,154727,694$52,409
Q4 2019ARK InvestSell-8554,621$461
Q4 2019Giverny CapitalBuy35,424832,848$83,068

Frequently asked questions about AME activity

  • Which institutional owners are buying AME?

    Institutional owners buying AME include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in AME activity?

    "Buy" means an investor increased their reported position in AME compared to the prior reporting period. This reflects growing exposure to AMETEK INC (AME) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in AME increasing?

    Institutional interest in AME can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.