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 2021Sequoia Financial AdvisorsBuy1,1613,493$1,762
Q2 2021Matrix Advisors Value FundBuy23322,062$11,130
Q2 2021Renaissance Technologies LLCSell-261,20061,344$30,946
Q2 2021Cantillon Capital ManagementSell-12,734916,670$462,433
Q2 2021AKO CapitalBuy248,578984,437$496,619
Q2 2021Viking Global InvestorsBuy149,5141,011,401$510,221
Q1 2021Dodge & Cox Stock FundSell-1,98932,856$14,995
Q1 2021ARK InvestBuy51,522241,791$110,349
Q1 2021Sequoia Financial AdvisorsSell-5342,332$1,064
Q1 2021Matrix Advisors Value FundSell-1121,829$9,962
Q1 2021Renaissance Technologies LLCBuy251,700322,544$147,203
Q1 2021AKO CapitalBuy206,585735,859$335,831
Q1 2021Viking Global InvestorsBuy784,070861,887$393,348
Q1 2021Cantillon Capital ManagementSell-34,796929,404$424,161
Q4 2020Dodge & Cox Stock FundSell-28534,845$16,230
Q4 2020ARK InvestBuy190,192190,269$88,623
Q4 2020Mairs & Power Growth FundBuy51,355$631
Q4 2020Sequoia Financial AdvisorsBuy512,866$1,335
Q4 2020Matrix Advisors Value FundSell-2,19421,840$10,173
Q4 2020Renaissance Technologies LLCSell-121,07370,844$32,998
Q4 2020Viking Global InvestorsSell-1,299,40677,817$36,246
Q4 2020AKO CapitalBuy93,897529,274$246,525
Q4 2020Cantillon Capital ManagementSell-4,781964,200$449,105
Q3 2020ARK InvestSell-82077$34
Q3 2020Dodge & Cox Stock FundSell-84035,130$15,511
Q3 2020Sound Shore ManagementSell-28,357160,052$70,666
Q3 2020Mairs & Power Growth FundSell-751,350$596
Q3 2020Sequoia Financial AdvisorsBuy2,8152,815$1,243
Q3 2020Matrix Advisors Value FundSell-54424,034$10,611
Q3 2020AKO CapitalBuy435,377435,377$192,228

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.