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 2024AKO CapitalBuy64,065524,248$289,909
Q2 2024Eagle Capital ManagementSell-244863$477,239
Q2 2024Mairs & Power Growth FundBuy2691,810$1,000,930
Q2 2024Matrix Advisors Value FundSell-82220,189$11,165,000
Q2 2024Sequoia Financial AdvisorsBuy4,75884,389$46,667,023
Q2 2024Renaissance Technologies LLCSell-92,697235,849$130,424,750
Q2 2024Cantillon Capital ManagementSell-41,876822,838$455,029,414
Q2 2024Parnassus Endeavor FundSell-208,5361,163,707$643,529,971
Q2 2024Polen Capital ManagementSell-156,9173,102,010$1,715,411,476
Q1 2024Dodge & Cox Stock FundSell-37526,798$15,575,266
Q1 2024AKO CapitalBuy296,246460,183$267,463
Q1 2024Eagle Capital ManagementSell-951,107$643,399
Q1 2024Mairs & Power Growth FundSell-901,541$895,645
Q1 2024Matrix Advisors Value FundSell-95621,011$12,211,803
Q1 2024Sequoia Financial AdvisorsBuy34,84379,631$46,282,521
Q1 2024Viking Global InvestorsSell-409,996128,489$74,679,092
Q1 2024Cantillon Capital ManagementSell-17,303864,714$502,580,424
Q1 2024Parnassus Endeavor FundSell-14,0411,372,243$797,561,354
Q1 2024TCI Fund ManagementSell-1,628,7431,517,639$882,066,963
Q1 2024Polen Capital ManagementBuy1,225,9773,258,927$1,894,120,742
Q4 2023AKO CapitalSell-174,490163,937$87,016
Q4 2023Mairs & Power Growth FundBuy671,631$865,718
Q4 2023Matrix Advisors Value FundSell-26721,967$11,659,864
Q4 2023Sequoia Financial AdvisorsBuy38,50344,788$23,772,926
Q4 2023Viking Global InvestorsSell-361,230538,485$285,822,453
Q4 2023Cantillon Capital ManagementSell-21,746882,017$468,165,803
Q4 2023Parnassus Endeavor FundBuy143,3561,386,284$735,825,685
Q4 2023Polen Capital ManagementSell-118,0782,032,950$1,079,159,556
Q4 2023TCI Fund ManagementSell-46,8003,146,382$1,670,068,102
Q3 2023Dodge & Cox Stock FundSell-25027,173$13,754,157

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.