THERMO FISHER SCIENTIFIC INC (TMO) Stock Institutional Trading Activity


THERMO FISHER SCIENTIFIC INC (TMO) 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 Viking Global Investors, Third Point, Lindsell Train, Polen Capital Management, and Cantillon 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
Q2 2022Parnassus Endeavor FundBuy26,081962,250$522,771
Q2 2022AKO CapitalBuy5,9621,212,500$658,727
Q1 2022ARK InvestSell-352786$464
Q1 2022Sequoia Financial AdvisorsBuy8673,254$1,922
Q1 2022Matrix Advisors Value FundBuy63422,496$13,287
Q1 2022Renaissance Technologies LLCSell-29,44431,900$18,842
Q1 2022Viking Global InvestorsBuy273,638484,696$286,286
Q1 2022Lone Pine CapitalSell-2,245,767520,709$307,557
Q1 2022Cantillon Capital ManagementBuy24,611862,901$509,673
Q1 2022Parnassus Endeavor FundBuy936,169936,169$552,948
Q1 2022AKO CapitalSell-23,3611,206,538$712,642
Q4 2021ARK InvestBuy1391,138$759
Q4 2021Dodge & Cox Stock FundSell-32731,604$21,087
Q4 2021Mairs & Power Growth FundBuy541,204$803
Q4 2021Sequoia Financial AdvisorsBuy1,7032,387$1,593
Q4 2021Matrix Advisors Value FundSell-20221,862$14,587
Q4 2021Viking Global InvestorsBuy28,821211,058$140,826
Q4 2021Cantillon Capital ManagementSell-62,921838,290$559,340
Q4 2021AKO CapitalBuy87,4381,229,899$820,638
Q3 2021ARK InvestSell-313999$571
Q3 2021Sequoia Financial AdvisorsSell-2,809684$391
Q3 2021Mairs & Power Growth FundSell-51,150$657
Q3 2021Matrix Advisors Value FundBuy222,064$12,606
Q3 2021Viking Global InvestorsSell-829,164182,237$104,117
Q3 2021Cantillon Capital ManagementSell-15,459901,211$514,889
Q3 2021AKO CapitalBuy158,0241,142,461$652,722
Q2 2021ARK InvestSell-240,4791,312$662
Q2 2021Eagle Capital ManagementSell-9428,691$14,474
Q2 2021Dodge & Cox Stock FundSell-92531,931$16,108
Q2 2021Mairs & Power Growth FundSell-2001,155$583

Frequently asked questions about TMO activity

  • Which institutional owners are buying TMO?

    Institutional owners buying TMO 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 TMO activity?

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

  • Is institutional interest in TMO increasing?

    Institutional interest in TMO 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.