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
Q3 2024Polen Capital ManagementSell-295,2242,806,786$1,736,193,727
Q3 2024Renaissance Technologies LLCSell-186,89848,951$30,279,779
Q3 2024AKO CapitalSell-100,775423,473$261,948
Q3 2024Parnassus Endeavor FundSell-35,8371,127,870$697,666,546
Q3 2024Cantillon Capital ManagementSell-23,838799,000$494,237,430
Q3 2024Sequoia Financial AdvisorsBuy4,87989,268$55,218,466
Q3 2024Matrix Advisors Value FundSell-43619,753$12,218,613
Q3 2024Torray FundBuy403403$249,284
Q3 2024Eagle Capital ManagementSell-180683$422,483
Q3 2024Mairs & Power Growth FundSell-1451,665$1,029,919
Q3 2024Dodge & Cox Stock FundSell-2526,766$16,556,645
Q2 2024Parnassus Endeavor FundSell-208,5361,163,707$643,529,971
Q2 2024Polen Capital ManagementSell-156,9173,102,010$1,715,411,476
Q2 2024Renaissance Technologies LLCSell-92,697235,849$130,424,750
Q2 2024AKO CapitalBuy64,065524,248$289,909
Q2 2024Cantillon Capital ManagementSell-41,876822,838$455,029,414
Q2 2024Sequoia Financial AdvisorsBuy4,75884,389$46,667,023
Q2 2024Matrix Advisors Value FundSell-82220,189$11,165,000
Q2 2024Mairs & Power Growth FundBuy2691,810$1,000,930
Q2 2024Eagle Capital ManagementSell-244863$477,239
Q2 2024Dodge & Cox Stock FundSell-726,791$14,815,423
Q1 2024TCI Fund ManagementSell-1,628,7431,517,639$882,066,963
Q1 2024Polen Capital ManagementBuy1,225,9773,258,927$1,894,120,742
Q1 2024Viking Global InvestorsSell-409,996128,489$74,679,092
Q1 2024AKO CapitalBuy296,246460,183$267,463
Q1 2024Sequoia Financial AdvisorsBuy34,84379,631$46,282,521
Q1 2024Cantillon Capital ManagementSell-17,303864,714$502,580,424
Q1 2024Parnassus Endeavor FundSell-14,0411,372,243$797,561,354
Q1 2024Matrix Advisors Value FundSell-95621,011$12,211,803
Q1 2024Dodge & Cox Stock FundSell-37526,798$15,575,266

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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