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
Q1 2023Cantillon Capital ManagementSell-14,827820,122$472,693,717
Q1 2023TCI Fund ManagementBuy770,380834,150$480,779,036
Q1 2023Viking Global InvestorsBuy17,310856,836$493,854,565
Q1 2023Parnassus Endeavor FundBuy134,0221,256,339$724,116,109
Q1 2023Polen Capital ManagementBuy77,2252,270,936$1,308,899,532
Q4 2022Eagle Capital ManagementSell-27,4891,202$661,929
Q4 2022Dodge & Cox Stock FundSell-1,83029,199$16,079,597
Q4 2022AKO CapitalSell-276,688647,343$356,485
Q4 2022Matrix Advisors Value FundSell-17622,174$12,211,000
Q4 2022Sequoia Financial AdvisorsBuy4,41422,487$12,383,305
Q4 2022TCI Fund ManagementBuy63,77063,770$35,117,501
Q4 2022Lone Pine CapitalSell-297,630587,696$323,638,310
Q4 2022Cantillon Capital ManagementSell-16,490834,949$459,798,065
Q4 2022Viking Global InvestorsBuy245,989839,526$462,318,573
Q4 2022Parnassus Endeavor FundSell-2,7581,122,317$618,048,749
Q4 2022Polen Capital ManagementBuy2,193,7112,193,711$1,208,054,689
Q3 2022Dodge & Cox Stock FundSell-57531,029$15,738
Q3 2022Sequoia Financial AdvisorsBuy30018,073$9,166
Q3 2022Matrix Advisors Value FundSell-12922,350$11,336
Q3 2022Viking Global InvestorsSell-269,050593,537$301,036
Q3 2022Cantillon Capital ManagementSell-6,767851,439$431,842
Q3 2022Lone Pine CapitalSell-46,966885,326$449,028
Q3 2022AKO CapitalSell-288,469924,031$468,659
Q3 2022Parnassus Endeavor FundBuy162,8251,125,075$570,627
Q2 2022ARK InvestSell-496290$165
Q2 2022Sequoia Financial AdvisorsBuy14,51917,773$9,656
Q2 2022Matrix Advisors Value FundSell-1722,479$12,212
Q2 2022Cantillon Capital ManagementSell-4,695858,206$466,246
Q2 2022Viking Global InvestorsBuy377,891862,587$468,626
Q2 2022Lone Pine CapitalBuy411,583932,292$506,496

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.