Stock Ownership/TMO

Thermo Fisher Scientific, Inc. (TMO): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in TMO · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
57
13F filers
Aggregate Value
$13.2B
Across holders
Last Price
$628.74
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity34 increased23 reduced1 exited
Full exits: RENAISSANCE TECHNOLOGIES LLC
Institutional Holders of TMO
↗
57 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
DODGE & COX
CIK 0000200217
Institutional Manager3.05M$1.5B11.6%0.8%Added+$1.5BQ2 2026
Fisher Asset Management, LLC
CIK 0000850529
Institutional Manager2.92M$1.5B11.1%0.4%Added+$32.2MQ2 2026
Grantham, Mayo, Van Otterloo & Co. LLC
CIK 0001352662
Institutional Manager2.74M$1.4B10.4%3.1%Added+$118.8MQ2 2026
EdgePoint Investment Group Inc.
CIK 0001481669
Hedge Fund2.18M$1.1B8.3%8.3%Added+$130.7MQ2 2026
PRIMECAP MANAGEMENT CO/CA/
CIK 0000763212
Institutional Manager1.98M$993.8M7.5%0.6%Reduced$-130KQ2 2026
VIKING GLOBAL INVESTORS LP
CIK 0001103804
Hedge Fund1.94M$971.3M7.4%2.8%Added+$135.1MQ2 2026
Clearbridge Investments, LLC
CIK 0001348883
Hedge Fund1.69M$847.8M6.4%0.7%Added+$40.3MQ2 2026
FARALLON CAPITAL MANAGEMENT LLC
CIK 0000909661
Hedge Fund1.05M$526.0M4.0%2.4%Added+$84.1MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund1.01M$505.1M3.8%0.2%Added+$187.0MQ2 2026
D1 Capital Partners L.P.
CIK 0001747057
Hedge Fund817K$409.7M3.1%1.2%Added+$46.2MQ2 2026
DODGE & COXAdded
Institutional Manager
$1.5B· 11.6% of total· 0.8% port· 3.05M sh· +$1.5B QoQ· Q2 2026
Fisher Asset Management, LLCAdded
Institutional Manager
$1.5B· 11.1% of total· 0.4% port· 2.92M sh· +$32.2M QoQ· Q2 2026
Grantham, Mayo, Van Otterloo & Co. LLCAdded
Institutional Manager
$1.4B· 10.4% of total· 3.1% port· 2.74M sh· +$118.8M QoQ· Q2 2026
EdgePoint Investment Group Inc.Added
Hedge Fund
$1.1B· 8.3% of total· 8.3% port· 2.18M sh· +$130.7M QoQ· Q2 2026
PRIMECAP MANAGEMENT CO/CA/Reduced
Institutional Manager
$993.8M· 7.5% of total· 0.6% port· 1.98M sh· $-130K QoQ· Q2 2026
VIKING GLOBAL INVESTORS LPAdded
Hedge Fund
$971.3M· 7.4% of total· 2.8% port· 1.94M sh· +$135.1M QoQ· Q2 2026
Clearbridge Investments, LLCAdded
Hedge Fund
$847.8M· 6.4% of total· 0.7% port· 1.69M sh· +$40.3M QoQ· Q2 2026
FARALLON CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$526.0M· 4.0% of total· 2.4% port· 1.05M sh· +$84.1M QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$505.1M· 3.8% of total· 0.2% port· 1.01M sh· +$187.0M QoQ· Q2 2026
D1 Capital Partners L.P.Added
Hedge Fund
$409.7M· 3.1% of total· 1.2% port· 817K sh· +$46.2M QoQ· Q2 2026
BAILLIE GIFFORD & COReduced
Institutional Manager
$323.7M· 2.5% of total· 0.3% port· 646K sh· +$224.7M QoQ· Q2 2026
SHAW D E & CO INCAdded
Hedge Fund
$321.7M· 2.4% of total· 0.2% port· 642K sh· +$321.2M QoQ· Q2 2026
GLENVIEW CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$314.5M· 2.4% of total· 5.7% port· 627K sh· +$188.9M QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$288.3M· 2.2% of total· 0.0% port· 575K sh· +$90.1M QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$247.0M· 1.9% of total· 0.2% port· 493K sh· +$152.3M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCReduced
Hedge Fund
$225.4M· 1.7% of total· 0.3% port· 450K sh· +$223.5M QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$213.6M· 1.6% of total· 0.3% port· 426K sh· $-1.2B QoQ· Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Reduced
Hedge Fund
$203.6M· 1.5% of total· 0.3% port· 406K sh· $-70.0M QoQ· Q2 2026
Select Equity Group, L.P.Added
Hedge Fund
$176.8M· 1.3% of total· 0.9% port· 353K sh· +$26.7M QoQ· Q2 2026
Woodline Partners LPReduced
Hedge Fund
$158.6M· 1.2% of total· 0.5% port· 316K sh· $-10.8M QoQ· Q2 2026
Point72 Asset Management, L.P.Reduced
Hedge Fund
$139.2M· 1.1% of total· 0.2% port· 278K sh· +$132.9M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$129.0M· 1.0% of total· 0.0% port· 258K sh· +$128.7M QoQ· Q2 2026
JUPITER ASSET MANAGEMENT LTDReduced
Hedge Fund
$110.1M· 0.8% of total· 0.5% port· 219K sh· $-7.6M QoQ· Q2 2026
Man Group plcAdded
Hedge Fund
$97.8M· 0.7% of total· 0.2% port· 195K sh· +$94.4M QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$83.7M· 0.6% of total· 0.1% port· 167K sh· +$50.9M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$83.0M· 0.6% of total· 0.0% port· 165K sh· +$47.5M QoQ· Q2 2026
Gotham Asset Management, LLCAdded
Hedge Fund
$69.9M· 0.5% of total· 0.2% port· 139K sh· +$18.8M QoQ· Q2 2026
PineBridge Investments, L.P.Added
Hedge Fund
$66.8M· 0.5% of total· 0.5% port· 138K sh· +$2.0M QoQ· Q3 2025
ORBIMED ADVISORS LLCAdded
Hedge Fund
$45.5M· 0.3% of total· 0.8% port· 91K sh· +$22.2M QoQ· Q2 2026
MARKEL CORP (MKL)Added
Hedge Fund
$36.6M· 0.3% of total· 0.3% port· 73K sh· +$3.0M QoQ· Q2 2026
TUDOR INVESTMENT CORP ET ALAdded
Hedge Fund
$35.7M· 0.3% of total· 0.0% port· 71K sh· +$24.0M QoQ· Q2 2026
Holocene Advisors, LPReduced
Hedge Fund
$25.9M· 0.2% of total· 0.1% port· 52K sh· $-145.2M QoQ· Q2 2026
Sculptor Capital LPAdded
Hedge Fund
$20.6M· 0.2% of total· 0.2% port· 41K sh· — QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$16.4M· 0.1% of total· 0.1% port· 33K sh· — QoQ· Q2 2026
Duquesne Family Office LLCAdded
Family Office
$9.6M· 0.1% of total· 0.2% port· 19K sh· — QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$8.5M· 0.1% of total· 0.0% port· 17K sh· $-85.7M QoQ· Q2 2026
Bridgewater Associates, LPReduced
Hedge Fund
$6.5M· 0.0% of total· 0.0% port· 13K sh· $-772K QoQ· Q2 2026
Schonfeld Strategic Advisors LLCAdded
Hedge Fund
$5.9M· 0.0% of total· 0.0% port· 12K sh· +$5.7M QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$5.6M· 0.0% of total· 0.0% port· 11K sh· +$5.3M QoQ· Q2 2026
Verition Fund Management LLCReduced
Hedge Fund
$5.2M· 0.0% of total· 0.0% port· 10K sh· +$3.5M QoQ· Q2 2026
TCW GROUP INCAdded
Hedge Fund
$3.1M· 0.0% of total· 0.0% port· 6K sh· +$21K QoQ· Q2 2026
Lighthouse Investment Partners, LLCReduced
Hedge Fund
$2.3M· 0.0% of total· 0.1% port· 5K sh· $-1.2M QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$2.2M· 0.0% of total· 0.0% port· 4K sh· +$2.0M QoQ· Q2 2026
GAMCO INVESTORS, INC. ET ALReduced
Institutional Manager
$2.0M· 0.0% of total· 0.0% port· 4K sh· $-237K QoQ· Q2 2026
ELEMENT CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$2.0M· 0.0% of total· 0.1% port· 4K sh· — QoQ· Q2 2026
FRED ALGER MANAGEMENT, LLCAdded
Hedge Fund
$1.6M· 0.0% of total· 0.0% port· 3K sh· — QoQ· Q2 2026
Bridgewater Advisors Inc.Added
Hedge Fund
$1.4M· 0.0% of total· 0.1% port· 2K sh· +$7K QoQ· Q2 2026
Fulcrum Asset Management LLPReduced
Hedge Fund
$944K· 0.0% of total· 0.1% port· 2K sh· $-3.1M QoQ· Q2 2026
CAXTON ASSOCIATES LLPAdded
Hedge Fund
$863K· 0.0% of total· 0.0% port· 2K sh· — QoQ· Q2 2026
Ancora Advisors, LLCReduced
Hedge Fund
$830K· 0.0% of total· 0.0% port· 2K sh· +$410K QoQ· Q2 2026
Parallax Volatility Advisers, L.P.Added
Hedge Fund
$814K· 0.0% of total· 0.0% port· 2K sh· — QoQ· Q2 2026
Eisler Capital (UK) Ltd.Reduced
Hedge Fund
$435K· 0.0% of total· 0.0% port· 703 sh· $-47.9M QoQ· Q3 2024
Alphadyne Asset Management LPReduced
Hedge Fund
$337K· 0.0% of total· 0.0% port· 672 sh· $-967K QoQ· Q2 2026
Hudson Bay Capital Management LPAdded
Hedge Fund
$261K· 0.0% of total· 0.0% port· 520 sh· — QoQ· Q2 2026
Magnetar Financial LLCReduced
Hedge Fund
$235K· 0.0% of total· 0.0% port· 468 sh· +$15K QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCReduced
Hedge Fund
$215K· 0.0% of total· 0.0% port· 428 sh· $-22.0M QoQ· Q2 2026
Walleye Capital LLCReduced
Hedge Fund
$106K· 0.0% of total· 0.0% port· 212 sh· $-997K QoQ· Q2 2026
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