THERMO FISHER SCIENTIFIC INC (TMO) Institutional Ownership Changes & 13F Activity

THERMO FISHER SCIENTIFIC INC (TMO) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Viking Global Investors, Renaissance Technologies LLC, Cantillon Capital Management, Parnassus Endeavor Fund, and Lindsell Train.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q2 2025AKO CapitalSell-306,41826,427$10,715
Q2 2025Renaissance Technologies LLCBuy303,706458,950$186,086,087
Q2 2025Polen Capital ManagementSell-132,1342,190,348$888,098,672
Q2 2025Sequoia Financial AdvisorsSell-85,56014,631$5,932,237
Q2 2025Cantillon Capital ManagementSell-25,508876,265$355,290,407
Q2 2025Matrix Advisors Value FundBuy5,66521,377$8,667,389
Q2 2025Olstein Capital ManagementBuy1,0008,000$3,244
Q2 2025Mairs & Power Growth FundBuy3101,616$655,223
Q2 2025Dodge & Cox Stock FundSell-16525,941$10,518,038
Q1 2025Polen Capital ManagementSell-138,7132,322,482$1,155,666,992
Q1 2025Lindsell TrainBuy101,550508,790$253,173,904
Q1 2025Cantillon Capital ManagementSell-28,097901,773$448,722,245
Q1 2025Renaissance Technologies LLCSell-26,100155,244$77,249,414
Q1 2025AKO CapitalBuy19,061332,845$165,624
Q1 2025Parnassus Endeavor FundBuy9,4741,420,431$706,806,466
Q1 2025Sequoia Financial AdvisorsBuy5,620100,191$49,855,119
Q1 2025Matrix Advisors Value FundSell-3,74415,712$7,818,291
Q1 2025Mairs & Power Growth FundSell-3101,306$649,866
Q1 2025Dodge & Cox Stock FundSell-1526,106$12,990,346
Q4 2024Third PointSell-1,200,000350,000$182,080,500
Q4 2024Lindsell TrainBuy407,240407,240$211,858,465
Q4 2024Polen Capital ManagementSell-345,5912,461,195$1,280,387,702
Q4 2024Parnassus Endeavor FundBuy283,0871,410,957$734,022,160
Q4 2024Renaissance Technologies LLCBuy132,393181,344$94,340,589
Q4 2024Cantillon Capital ManagementBuy130,870929,870$483,746,270
Q4 2024AKO CapitalSell-109,689313,784$163,240
Q4 2024Sequoia Financial AdvisorsBuy5,30394,571$49,198,676
Q4 2024Dodge & Cox Stock FundSell-64526,121$13,588,928
Q4 2024Matrix Advisors Value FundSell-29719,456$10,121,595
Q4 2024Mairs & Power Growth FundSell-491,616$840,692

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.

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