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
Q4 2025Olstein Capital ManagementSell-1,6006,400$3,708
Q4 2025Mairs & Power Growth FundSell-3751,241$719,097
Q4 2025Polen Capital ManagementSell-112,2062,307$1,336,900
Q4 2025Matrix Advisors Value FundSell-17021,341$12,366,227
Q4 2025Third PointSell-300,00050,000$28,972,500
Q4 2025Lindsell TrainSell-128,026689,503$399,532,513
Q4 2025Viking Global InvestorsBuy664,698793,187$459,612,207
Q4 2025Cantillon Capital ManagementBuy6,552873,322$506,046,433
Q3 2025Dodge & Cox Stock FundSell-20025,741$12,484,900
Q3 2025Hillman Value FundBuy820820$397,716
Q3 2025Sequoia Financial AdvisorsBuy24714,878$7,215,946
Q3 2025Matrix Advisors Value FundBuy13421,511$10,433,096
Q3 2025Polen Capital ManagementSell-2,075,835114,513$55,541,018
Q3 2025Lindsell TrainSell-37,083817,529$396,517,916
Q3 2025Cantillon Capital ManagementSell-9,495866,770$420,400,785
Q3 2025Parnassus Endeavor FundSell-71,6372,093,621$1,015,448,058
Q2 2025Dodge & Cox Stock FundSell-16525,941$10,518,038
Q2 2025Olstein Capital ManagementBuy1,0008,000$3,244
Q2 2025AKO CapitalSell-306,41826,427$10,715
Q2 2025Mairs & Power Growth FundBuy3101,616$655,223
Q2 2025Sequoia Financial AdvisorsSell-85,56014,631$5,932,237
Q2 2025Matrix Advisors Value FundBuy5,66521,377$8,667,389
Q2 2025Renaissance Technologies LLCBuy303,706458,950$186,086,087
Q2 2025Lindsell TrainBuy345,822854,612$346,510,982
Q2 2025Cantillon Capital ManagementSell-25,508876,265$355,290,407
Q2 2025Parnassus Endeavor FundBuy744,8272,165,258$877,925,508
Q2 2025Polen Capital ManagementSell-132,1342,190,348$888,098,672
Q1 2025Dodge & Cox Stock FundSell-1526,106$12,990,346
Q1 2025AKO CapitalBuy19,061332,845$165,624
Q1 2025Mairs & Power Growth FundSell-3101,306$649,866

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.