Who owns Thermo Fisher Scientific (TMO)
Which tracked institutional funds hold TMO, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See TMO company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
576 tracked funds added or opened TMO while 562 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
TMO’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.2% of its own reported 13F book, while the median holder sizes it at 0.3% of theirs — a 0.1pp gap the other way — the median holder sizes TMO more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in TMO divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 2493 tracked filers holding TMO, 1089 increased or opened the position and 1406 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in TMO between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 92
- Jupiter Topco LLC$338M
- Freestone Grove Partners LP$113M
- Castle Hook Partners LP$83M
- Sound Shore Management Inc /CT/$83M
- Evelyn Partners Group Ltd$59M
- Nykredit A/S$58M
Full exits 190
- Amundi$991M
- GENERATION INVESTMENT MANAGEMENT LLP$380M
- Cantillon Capital Management LLC$378M
- DekaBank Deutsche Girozentrale$377M
- JANUS HENDERSON GROUP PLC$325M
- Handelsbanken Fonder AB$312M
Largest adds
- FMR LLC$1.8B
- DODGE & COX$1.5B
- JPMORGAN CHASE & CO$1.0B
- BlackRock, Inc.$856M
- FRANKLIN RESOURCES INC$297M
- VANGUARD CAPITAL MANAGEMENT LLC$236M
Largest trims
- BANK OF AMERICA CORP /DE/$767M
- PRICE T ROWE ASSOCIATES INC /MD/$539M
- NORGES BANK$528M
- Pictet Asset Management Holding SA$474M
- ALLIANCEBERNSTEIN L.P.$360M
- Capital International Investors$316M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 30,919,632 | $15.5B | 11.5% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 24,276,316 | $12.2B | 9.0% | 2026-Q2 |
| STATE STREET CORP added | 16,825,879 | $8.4B | 6.3% | 2026-Q2 |
| Corient Private Wealth LP added | 16,191,744 | $385M | 0.3% | 2026-Q2 |
| FMR LLC added | 14,084,488 | $7.1B | 5.2% | 2026-Q2 |
| MORGAN STANLEY trimmed | 10,763,066 | $5.4B | 4.0% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 8,503,527 | $4.3B | 3.2% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 8,382,401 | $4.2B | 3.1% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 7,271,514 | $3.6B | 2.7% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 6,226,169 | $3.1B | 2.3% | 2026-Q2 |
| Capital World Investors trimmed | 6,195,370 | $3.1B | 2.3% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 5,116,336 | $2.6B | 1.9% | 2026-Q2 |
| NORGES BANK trimmed | 5,087,903 | $2.6B | 1.9% | 2026-Q2 |
| Capital Research Global Investors trimmed | 4,147,545 | $2.1B | 1.5% | 2026-Q2 |
| Bank of New York Mellon Corp added | 3,938,410 | $2.0B | 1.5% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 3,895,265 | $2.0B | 1.4% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 3,430,798 | $1.7B | 1.3% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 3,328,836 | $1.7B | 1.2% | 2026-Q2 |
| Capital International Investors trimmed | 3,182,151 | $1.6B | 1.2% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 3,114,527 | $1.6B | 1.2% | 2026-Q2 |
| DODGE & COX added | 3,054,778 | $1.5B | 1.1% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 2,965,714 | $2.3B | 1.7% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 2,957,066 | $1.5B | 1.1% | 2026-Q2 |
| Fisher Asset Management, LLC added | 2,915,715 | $1.5B | 1.1% | 2026-Q2 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main trimmed | 2,757,752 | $1.4B | 1.0% | 2026-Q2 |
| Grantham, Mayo, Van Otterloo & Co. LLC added | 2,739,191 | $1.4B | 1.0% | 2026-Q2 |
| UBS Group AG added | 2,521,208 | $1.3B | 0.9% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 2,472,524 | $1.2B | 0.9% | 2026-Q2 |
| Legal & General Group Plc trimmed | 2,238,613 | $1.1B | 0.8% | 2026-Q2 |
| EdgePoint Investment Group Inc. added | 2,179,650 | $1.1B | 0.8% | 2026-Q2 |
| Invesco Ltd. trimmed | 2,179,010 | $1.1B | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 2,086,585 | $1.0B | 0.8% | 2026-Q2 |
| Unisphere Establishment | 2,060,000 | $1.0B | 0.8% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 2,012,934 | $1.0B | 0.7% | 2026-Q2 |
| PRIMECAP MANAGEMENT CO/CA/ trimmed | 1,982,271 | $994M | 0.7% | 2026-Q2 |
| VIKING GLOBAL INVESTORS LP added | 1,937,415 | $971M | 0.7% | 2026-Q2 |
| FLOSSBACH VON STORCH SE trimmed | 1,905,975 | $956M | 0.7% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 1,849,037 | $909M | 0.7% | 2026-Q2 |
| 1832 Asset Management L.P. trimmed | 1,721,443 | $863M | 0.6% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 1,712,845 | $859M | 0.6% | 2026-Q2 |
| Clearbridge Investments, LLC added | 1,691,069 | $848M | 0.6% | 2026-Q2 |
| PARNASSUS INVESTMENTS, LLC added | 1,639,589 | $822M | 0.6% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 1,547,342 | $776M | 0.6% | 2026-Q2 |
| SCHRODER INVESTMENT MANAGEMENT GROUP trimmed | 1,525,255 | $765M | 0.6% | 2026-Q2 |
| Nuveen, LLC trimmed | 1,513,180 | $759M | 0.6% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 1,458,431 | $731M | 0.5% | 2026-Q2 |
| BARCLAYS PLC trimmed | 1,354,112 | $679M | 0.5% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 1,330,750 | $667M | 0.5% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 1,315,185 | $659M | 0.5% | 2026-Q2 |
| Swedbank AB trimmed | 1,298,760 | $651M | 0.5% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 1,214,802 | $609M | 0.5% | 2026-Q2 |
| Temasek Holdings (Private) Ltd trimmed | 1,163,729 | $583M | 0.4% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC trimmed | 1,134,093 | $569M | 0.4% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. added | 1,079,405 | $541M | 0.4% | 2026-Q2 |
| Pictet Asset Management Holding SA trimmed | 1,073,670 | $538M | 0.4% | 2026-Q2 |
| FARALLON CAPITAL MANAGEMENT, L.L.C. added | 1,049,185 | $526M | 0.4% | 2026-Q2 |
| Swiss National Bank trimmed | 1,048,120 | $525M | 0.4% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 1,007,394 | $505M | 0.4% | 2026-Q2 |
| Rathbones Group PLC added | 1,005,460 | $504M | 0.4% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 979,181 | $491M | 0.4% | 2026-Q2 |
| Veritas Asset Management LLP added | 882,873 | $443M | 0.3% | 2026-Q2 |
| Focus Partners Wealth trimmed | 860,536 | $431M | 0.3% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 855,955 | $430M | 0.3% | 2026-Q2 |
| National Pension Service added | 841,947 | $422M | 0.3% | 2026-Q2 |
| FIRST MANHATTAN CO. LLC. added | 841,894 | $422M | 0.3% | 2026-Q2 |
| D1 Capital Partners L.P. added | 817,123 | $410M | 0.3% | 2026-Q2 |
| W1M Asset Management Ltd added | 814,886 | $408M | 0.3% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 801,663 | $402M | 0.3% | 2026-Q2 |
| FIL Ltd added | 789,329 | $396M | 0.3% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 779,661 | $391M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 737,831 | $370M | 0.3% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 729,800 | $366M | 0.3% | 2026-Q2 |
| California Public Employees Retirement System added | 696,759 | $349M | 0.3% | 2026-Q2 |
| KING LUTHER CAPITAL MANAGEMENT CORP trimmed | 677,313 | $340M | 0.3% | 2026-Q2 |
| Jupiter Topco LLC new | 673,276 | $338M | 0.3% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 667,506 | $335M | 0.2% | 2026-Q2 |
| CITIGROUP INC added | 650,976 | $326M | 0.2% | 2026-Q2 |
| BAILLIE GIFFORD & CO trimmed | 645,648 | $324M | 0.2% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 641,637 | $322M | 0.2% | 2026-Q2 |
| STIFEL FINANCIAL CORP trimmed | 633,668 | $318M | 0.2% | 2026-Q2 |
| GLENVIEW CAPITAL MANAGEMENT, LLC added | 627,240 | $314M | 0.2% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 616,961 | $309M | 0.2% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 614,218 | $308M | 0.2% | 2026-Q2 |
| APG Asset Management N.V. trimmed | 607,825 | $267M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 593,946 | $298M | 0.2% | 2026-Q2 |
| Ninety One UK Ltd trimmed | 593,668 | $298M | 0.2% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 592,301 | $297M | 0.2% | 2026-Q2 |
| Mirova US LLC trimmed | 591,257 | $296M | 0.2% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ added | 581,630 | $292M | 0.2% | 2026-Q2 |
| Robeco Institutional Asset Management B.V. trimmed | 577,627 | $290M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 574,992 | $288M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 563,776 | $283M | 0.2% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 553,857 | $278M | 0.2% | 2026-Q2 |
| CIBC Bancorp USA Inc. trimmed | 544,854 | $273M | 0.2% | 2026-Q2 |
| Eurizon Capital SGR S.p.A. added | 539,965 | $271M | 0.2% | 2026-Q2 |
| Longview Partners (Guernsey) LTD trimmed | 529,776 | $266M | 0.2% | 2026-Q2 |
| Lindsell Train Ltd trimmed | 514,512 | $258M | 0.2% | 2026-Q2 |
| Southpoint Capital Advisors LP added | 500,000 | $251M | 0.2% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 492,580 | $247M | 0.2% | 2026-Q2 |
| LORING WOLCOTT & COOLIDGE FIDUCIARY ADVISORS LLP/MA trimmed | 491,482 | $246M | 0.2% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.