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
Q3 2019Mairs & Power Growth FundSell-3001,760$513
Q3 2019Dodge & Cox Stock FundSell-70036,643$10,673
Q3 2019Ariel Appreciation FundSell-36,886114,755$33,425
Q3 2019Sound Shore ManagementBuy55,744449,019$130,786
Q3 2019Sequoia Financial AdvisorsSell-3292,091$609
Q3 2019Matrix Advisors Value FundSell-1,01140,515$11,801
Q3 2019Egerton Capital UKSell-24,634315,359$91,855
Q3 2019Meritage GroupBuy189,478909,957$265,043
Q3 2019Cantillon Capital ManagementSell-8,117992,864$289,191
Q2 2019Sound Shore ManagementSell-121,453393,275$115,497
Q2 2019Eagle Capital ManagementBuy11729,287$8,601
Q2 2019Dodge & Cox Stock FundSell-90537,343$10,967
Q2 2019Ariel Appreciation FundSell-8,564151,641$44,534
Q2 2019ARK InvestSell-17,996897$263
Q2 2019Sequoia Financial AdvisorsBuy6502,420$711
Q2 2019Olstein Capital ManagementSell-1,50010,500$3,084
Q2 2019Matrix Advisors Value FundSell-6,43141,526$12,195
Q2 2019Egerton Capital UKBuy339,993339,993$99,849
Q2 2019Cantillon Capital ManagementSell-20,7641,000,981$293,968
Q1 2019Sound Shore ManagementSell-5,938514,728$140,891
Q1 2019Eagle Capital ManagementSell-4,06229,170$7,984
Q1 2019Dodge & Cox Stock FundSell-1,10038,248$10,469
Q1 2019Ariel Appreciation FundSell-23,290160,205$43,851
Q1 2019Sequoia Financial AdvisorsSell-4051,770$484
Q1 2019Olstein Capital ManagementSell-50012,000$3,285
Q1 2019Matrix Advisors Value FundSell-2,02347,957$13,127
Q1 2019Meritage GroupBuy2,351720,479$197,210
Q1 2019Cantillon Capital ManagementSell-3,1851,021,745$279,672
Q1 2019Viking Global InvestorsBuy598,1311,146,037$313,693
Q4 2018Sound Shore ManagementSell-154,044520,666$116,520

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.