THERMO FISHER SCIENTIFIC INC (TMO)
Institutional ownership reported to the SEC as of Q2 2026, across 32 quarters.
Institutions report 336,487,328 shares against 369,747,286 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $15.5B | 30,919,632 | 0.23% | 8q | +1.6%+$246.9M |
| VANGUARD CAPITAL MANAGEMENT LLC | $12.2B | 24,276,316 | 0.26% | 2q | HELD |
| STATE STREET CORP | $8.4B | 16,825,879 | 0.25% | 31q | +0.6%+$47.3M |
| FMR LLC | $7.1B | 14,084,488 | 0.31% | 31q | +30.7%+$1.7B |
| MORGAN STANLEY | $5.4B | 10,763,066 | 0.29% | 35q | -0.9%-$50.4M |
| JPMORGAN CHASE & CO | $4.3B incl. $15.6M options CALL+PUT | 8,503,527 | 0.24% | 31q | +25.1%+$868.1M |
| GEODE CAPITAL MANAGEMENT, LLC | $4.2B | 8,382,401 | 0.22% | 31q | HELD |
| FRANKLIN RESOURCES INC | $3.6B | 7,271,514 | 0.79% | 31q | +6.7%+$229.9M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $3.1B | 6,226,169 | 0.14% | 2q | +1.0%+$31.5M |
| Capital World Investors | $3.1B | 6,195,370 | 0.37% | 31q | -6.8%-$226.1M |
| PRICE T ROWE ASSOCIATES INC /MD/ | $2.6B | 5,116,336 | 0.26% | 31q | -19.0%-$601.2M |
| NORGES BANK | $2.6B | 5,087,903 | 0.25% | 32q | -4.1%-$107.8M |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $2.3B | 2,965,714 | 0.72% | 31q | -1.6%-$36.4M |
| Capital Research Global Investors | $2.1B | 4,147,545 | 0.29% | 31q | -6.0%-$133.9M |
| Bank of New York Mellon Corp | $2.0B | 3,938,410 | 0.32% | 31q | +4.6%+$86.1M |
| BANK OF AMERICA CORP /DE/ | $2.0B | 3,895,265 | 0.13% | 31q | -29.6%-$821.3M |
| ROYAL BANK OF CANADA | $1.8B incl. $60.9M options CALL | 3,430,798 | 0.27% | 31q | -12.3%-$250.8M |
| NORTHERN TRUST CORP | $1.7B | 3,328,836 | 0.19% | 31q | -2.5%-$43.5M |
| Capital International Investors | $1.6B | 3,182,151 | 0.33% | 5q | -18.2%-$354.3M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.6B | 3,114,527 | 0.21% | 31q | +6.1%+$90.1M |
| GOLDMAN SACHS GROUP INC | $1.6B incl. $69.6M options CALL+PUT | 2,957,066 | 0.13% | 31q | -6.3%-$105.1M |
| Dodge & Cox | $1.5B | 3,054,778 | 0.80% | 31q | +11767.4%+$1.5B |
| Fisher Asset Management, LLC | $1.5B | 2,915,715 | 0.44% | 29q | +2.2%+$32.2M |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | $1.4B | 2,757,752 | 1.06% | 32q | -5.4%-$78.8M |
| Grantham, Mayo, Van Otterloo & Co. LLC | $1.4B | 2,739,191 | 3.09% | 9q | +9.5%+$118.8M |
| UBS Group AG | $1.3B incl. $26.6M options CALL+PUT | 2,521,208 | 0.16% | 31q | +2.8%+$34.7M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $1.2B | 2,472,524 | 0.23% | 31q | +0.9%+$11.4M |
| Legal & General Group Plc | $1.1B | 2,238,613 | 0.23% | 31q | -5.6%-$66.1M |
| EdgePoint Investment Group Inc. | $1.1B | 2,179,650 | 8.26% | 6q | +13.6%+$130.7M |
| Invesco Ltd. | $1.1B | 2,179,010 | 0.09% | 31q | -2.5%-$28.4M |
| VANGUARD FIDUCIARY TRUST CO | $1.0B | 2,086,585 | 0.23% | 2q | -1.2%-$12.6M |
| Unisphere Establishment | $1.0B | 2,060,000 | 8.79% | 11q | HELD |
| Mitsubishi UFJ Asset Management Co., Ltd. | $1.0B | 2,012,934 | 0.56% | 31q | +8.6%+$80.1M |
| PRIMECAP MANAGEMENT CO/CA/ | $993.8M | 1,982,271 | 0.59% | 31q | HELD |
| VIKING GLOBAL INVESTORS LP | $971.3M | 1,937,415 | 2.77% | 3q | +16.2%+$135.1M |
| FLOSSBACH VON STORCH SE | $955.6M | 1,905,975 | 4.32% | 31q | -2.5%-$24.1M |
| Amundi | $909.0M | 1,813,091 | 0.22% | 21q | -10.1%-$101.9M |
| ALLIANCEBERNSTEIN L.P. | $908.9M | 1,849,037 | 0.30% | 31q | -15.6%-$167.9M |
| 1832 Asset Management L.P. | $863.1M | 1,721,443 | 0.43% | 31q | -12.6%-$124.4M |
| DIMENSIONAL FUND ADVISORS LP | $858.8M | 1,712,845 | 0.16% | 31q | +1.4%+$11.6M |
| Clearbridge Investments, LLC | $847.8M | 1,691,069 | 0.70% | 31q | +5.0%+$40.3M |
| PARNASSUS INVESTMENTS, LLC | $822.0M | 1,639,589 | 2.20% | 18q | +9.0%+$67.7M |
| AMERIPRISE FINANCIAL INC | $775.9M | 1,547,342 | 0.16% | 31q | -7.4%-$61.7M |
| SCHRODER INVESTMENT MANAGEMENT GROUP | $764.7M | 1,525,255 | 0.54% | 31q | -11.8%-$101.9M |
| Nuveen, LLC | $758.6M | 1,513,180 | 0.18% | 6q | -8.1%-$67.1M |
| WELLS FARGO & COMPANY/MN | $731.2M | 1,458,431 | 0.12% | 31q | +1.0%+$7.5M |
| BARCLAYS PLC | $678.9M | 1,354,112 | 0.13% | 31q | -26.6%-$245.7M |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $667.2M | 1,330,750 | 0.52% | 31q | -6.5%-$46.6M |
| LOOMIS SAYLES & CO L P | $659.4M | 1,315,185 | 0.83% | 31q | -3.6%-$24.4M |
| Swedbank AB | $651.1M | 1,298,760 | 0.56% | 21q | -12.3%-$91.0M |
| Temasek Holdings (Private) Ltd | $611.4M incl. $28.0M options PUT | 1,163,729 | 1.64% | 31q | -2.7%-$16.8M |
| DEUTSCHE BANK AG\ | $609.1M | 1,214,802 | 0.18% | 34q | -3.6%-$22.8M |
| LAZARD ASSET MANAGEMENT LLC | $568.6M | 1,134,093 | 0.86% | 46q | -7.2%-$44.1M |
| CITADEL ADVISORS LLC | $565.4M incl. $277.1M options CALL+PUT | 574,992 | 0.06% | 31q | -33.5%-$284.7M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $556.8M incl. $522.1M options CALL+PUT | 69,202 | 0.04% | 31q | +7.5%+$38.6M |
| Sumitomo Mitsui Trust Group, Inc. | $541.2M | 1,079,405 | 0.31% | 31q | HELD |
| Pictet Asset Management Holding SA | $538.4M | 1,073,670 | 0.51% | 12q | -47.9%-$495.3M |
| FARALLON CAPITAL MANAGEMENT, L.L.C. | $526.0M | 1,049,185 | 2.43% | 27q | +19.0%+$84.1M |
| Swiss National Bank | $525.5M | 1,048,120 | 0.27% | 31q | -4.9%-$27.3M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $505.1M | 1,007,394 | 0.22% | 24q | +58.8%+$187.0M |
| Rathbones Group PLC | $504.1M | 1,005,460 | 1.86% | 31q | -47.3%-$452.4M |
| WELLINGTON MANAGEMENT GROUP LLP | $490.9M | 979,181 | 0.08% | 31q | -33.8%-$250.2M |
| SG Americas Securities, LLC | $471.4M incl. $1.5M options CALL+PUT | 937,270 | 0.26% | 31q | +551.2%+$399.0M |
| Veritas Asset Management LLP | $442.6M | 882,873 | 7.96% | 31q | +4.4%+$18.5M |
| JANE STREET GROUP, LLC | $434.2M incl. $410.1M options CALL+PUT | 48,114 | 0.04% | 31q | +180.3%+$279.3M |
| HSBC HOLDINGS PLC | $433.6M incl. $4.0M options PUT | 855,955 | 0.18% | 31q | +19.1%+$69.4M |
| Focus Partners Wealth | $431.4M | 860,536 | 0.44% | 11q | -24.6%-$140.6M |
| FIRST MANHATTAN CO. LLC. | $422.4M | 841,894 | 1.08% | 31q | +9.7%+$37.5M |
| National Pension Service | $422.1M | 841,947 | 0.27% | 31q | +1.5%+$6.2M |
| D1 Capital Partners L.P. | $409.7M | 817,123 | 1.18% | 2q | +12.7%+$46.2M |
| W1M Asset Management Ltd | $408.0M | 814,886 | 3.74% | 12q | +2.7%+$10.7M |
| BNP PARIBAS FINANCIAL MARKETS | $403.0M incl. $33.0M options CALL+PUT | 737,831 | 0.14% | 31q | +10.9%+$39.7M |
| Vanguard Global Advisers, LLC | $401.9M | 801,663 | 0.19% | 2q | -2.5%-$10.2M |
| FIL Ltd | $395.7M | 789,329 | 0.28% | 31q | +48.4%+$129.1M |
| RAYMOND JAMES FINANCIAL INC | $390.9M | 779,661 | 0.11% | 7q | +0.6%+$2.2M |
| DekaBank Deutsche Girozentrale | $369.5M | 772,643 | 0.62% | 31q | HELD |
| VANGUARD ASSET MANAGEMENT, Ltd | $365.9M | 729,800 | 0.25% | 2q | +11.8%+$38.6M |
| Corient Private Wealth LP | $354.7M | 707,412 | 0.49% | 15q | -15.0%-$62.5M |
| California Public Employees Retirement System | $349.3M | 696,759 | 0.20% | 31q | HELD |
| Assenagon Asset Management S.A. | $342.7M | 683,626 | 0.21% | 31q | +266.7%+$249.3M |
| KING LUTHER CAPITAL MANAGEMENT CORP | $339.6M | 677,313 | 1.39% | 31q | -4.5%-$16.1M |
| CITIGROUP INC | $338.9M incl. $12.5M options CALL+PUT | 650,976 | 0.11% | 31q | +13.8%+$41.0M |
| Jupiter Topco LLC | $337.5M | 673,276 | 0.14% | new | FIRST |
| NEUBERGER BERMAN GROUP LLC | $334.7M | 667,506 | 0.22% | 31q | -24.6%-$109.3M |
| BAILLIE GIFFORD & CO | $323.7M | 645,648 | 0.29% | 31q | -7.6%-$26.5M |
| D. E. Shaw & Co., Inc. | $322.2M incl. $551.5K options CALL+PUT | 641,637 | 0.15% | 31q | +111.9%+$170.1M |
| STIFEL FINANCIAL CORP | $317.7M | 633,668 | 0.26% | 31q | -2.4%-$7.8M |
| GLENVIEW CAPITAL MANAGEMENT, LLC | $314.5M | 627,240 | 5.73% | 5q | +150.4%+$188.9M |
| VICTORY CAPITAL MANAGEMENT INC | $309.3M | 616,961 | 0.17% | 31q | -1.7%-$5.4M |
| CANADA PENSION PLAN INVESTMENT BOARD | $307.9M | 614,218 | 0.17% | 16q | +9.2%+$26.0M |
| RHUMBLINE ADVISERS | $297.8M | 593,946 | 0.22% | 31q | -2.9%-$9.0M |
| Ninety One UK Ltd | $297.6M | 593,668 | 0.67% | 31q | -6.8%-$21.9M |
| ENVESTNET ASSET MANAGEMENT INC | $297.0M | 592,301 | 0.07% | 31q | -3.4%-$10.6M |
| Mirova US LLC | $296.4M | 591,257 | 3.19% | 27q | -3.9%-$11.9M |
| BANK OF MONTREAL /CAN/ | $291.6M | 581,630 | 0.10% | 31q | HELD |
| Robeco Institutional Asset Management B.V. | $289.6M | 577,627 | 0.36% | 38q | -9.0%-$28.6M |
| Qube Research & Technologies Ltd | $286.1M incl. $39.1M options CALL+PUT | 492,580 | 0.27% | 16q | +160.9%+$176.4M |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $282.7M | 563,776 | 0.26% | 31q | -1.4%-$4.0M |
| PRINCIPAL FINANCIAL GROUP INC | $277.7M | 553,857 | 0.14% | 31q | -11.3%-$35.5M |
| Allianz Asset Management GmbH | $276.0M incl. $11.8M options CALL+PUT | 526,918 | 0.22% | 40q | +26.0%+$57.0M |
Showing the largest 100 of 2,644 reported holders.
Q2 2026 in brief
In Q2 2026, 2,644 managers that file Form 13F reported holding Thermo Fisher Scientific Inc (TMO), $171.5B in all, or about 90% of the shares outstanding. 202 managers opened a position and 186 sold out completely, against 2,628 holders the quarter before. Largest holders: Blackrock, Inc., Vanguard Capital Management Llc and State Street Corp. Largest new positions: Freestone Grove Partners Lp ($113.4M), Castle Hook Partners Lp ($83.2M) and Sound Shore Management Inc /Ct/ ($82.9M).
Q2 2026 is the latest quarter whose 13F deadline has passed. A 13F shows long US stock positions at quarter end, filed up to 45 days later; an adviser and a sub-adviser can both report the same shares.
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-10-30 | 2026-10-27 | Directors or officers departed or appointed | filing |
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-11 | Shafer Michael D | Executive Vice President | Sold | 25,500 | $15.3M ×2 |
| 2026-08-05 | CASPER MARC N | Chairman & CEO | Sold | 15,000 | $8.6M ×22 |
| 2026-08-06 | CASPER MARC N | Chairman & CEO | Sold | 15,000 | $8.6M ×18 |
| 2026-08-19 | Britt Lisa P. | Sr. VP and Chief HR Officer | Sold | 11,440 | $7.0M |
| 2026-08-20 | CASPER MARC N | Chairman & CEO | Sold | 10,000 | $6.3M ×9 |
| 2026-08-21 | CASPER MARC N | Chairman & CEO | Sold | 10,000 | $6.3M ×5 |
| 2026-08-06 | Britt Lisa P. | Sr. VP and Chief HR Officer | Sold | 5,850 | $3.4M |
| 2026-08-07 | CASPER MARC N | Chairman & CEO | Sold | 4,883 | $2.9M ×27 |
| 2026-08-31 | Pettiti Gianluca | President & COO | Sold | 4,133 | $2.5M ×2 |
| 2026-08-07 | Holmes Joseph R. | VP & Chief Accounting Officer | Sold | 420 | $245.6K |
| 2026-07-27 | Pettiti Gianluca | President & COO | Sold | 400 | $226.0K |
| 2026-08-24 | CASPER MARC N | Chairman & CEO | Sold | 275 | $172.4K ×4 |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 1,104 | $14.2B | 21,044,147 | 127 | 340 | 401 | 0.0% |
| Q2 2026 | 2,644 | $171.5B | 336,487,328 | 173 | 896 | 1,082 | 1.2% |
| Q1 2026 | 2,628 | $166.8B | 333,345,345 | 139 | 904 | 1,015 | 1.3% |
| Q4 2025 | 2,723 | $204.6B | 346,975,638 | 210 | 864 | 952 | 1.7% |
| Q3 2025 | 2,528 | $169.0B | 340,151,409 | 220 | 903 | 904 | 2.5% |
| Q2 2025 | 2,466 | $140.2B | 337,964,641 | 154 | 870 | 998 | 2.2% |
| Q1 2025 | 2,587 | $170.2B | 338,345,369 | 130 | 947 | 927 | 1.2% |
| Q4 2024 | 2,629 | $180.0B | 340,883,785 | 103 | 818 | 1,018 | 1.4% |
| Q3 2024 | 2,587 | $215.8B | 344,048,959 | 139 | 928 | 896 | 1.6% |
| Q2 2024 | 2,559 | $193.5B | 345,705,016 | 128 | 964 | 832 | 1.3% |
| Q1 2024 | 2,547 | $215.1B | 365,857,616 | 148 | 919 | 883 | 1.2% |
| Q4 2023 | 2,505 | $194.3B | 359,306,198 | 137 | 801 | 916 | 1.9% |
| Q3 2023 | 2,375 | $176.0B | 342,710,151 | 107 | 882 | 802 | 1.4% |
| Q2 2023 | 2,397 | $182.3B | 342,957,454 | 119 | 841 | 883 | 1.4% |
| Q1 2023 | 2,396 | $206.0B | 353,898,884 | 121 | 780 | 929 | 1.4% |
| Q4 2022 | 2,387 | $194.3B | 346,590,080 | 121 | 744 | 904 | 1.8% |
| Q3 2022 | 2,242 | $975.5B | 2,907,482,239 | 93 | 805 | 749 | 0.3% |
| Q2 2022 | 2,279 | $1.1T | 2,246,404,527 | 101 | 747 | 884 | 0.2% |
| Q1 2022 | 2,314 | $1.2T | 2,121,766,226 | 119 | 756 | 877 | 0.2% |
| Q4 2021 | 2,342 | $980.5B | 1,603,874,812 | 147 | 767 | 747 | 0.5% |
| Q3 2021 | 2,135 | $1.2T | 2,235,727,882 | 138 | 718 | 734 | 0.3% |
| Q2 2021 | 2,080 | $609.8B | 1,532,584,247 | 137 | 802 | 698 | 0.4% |
| Q1 2021 | 2,036 | $559.0B | 1,273,054,858 | 110 | 776 | 712 | 0.4% |
| Q4 2020 | 2,029 | $768.1B | 1,681,574,314 | 148 | 681 | 683 | 0.3% |
| Q3 2020 | 1,852 | $681.8B | 1,772,297,197 | 152 | 574 | 708 | 0.2% |
| Q2 2020 | 1,749 | $523.0B | 1,565,664,190 | 161 | 559 | 668 | 0.2% |
| Q1 2020 | 1,675 | $514.8B | 1,904,735,678 | 118 | 573 | 681 | 0.1% |
| Q4 2019 | 1,681 | $551.0B | 1,824,930,061 | 108 | 477 | 598 | 0.2% |
| Q3 2019 | 1,547 | $487.4B | 1,752,784,514 | 71 | 497 | 558 | 0.1% |
| Q2 2019 | 1,560 | $445.3B | 1,673,439,019 | 105 | 517 | 564 | 0.2% |
| Q1 2019 | 1,528 | $471.7B | 1,806,608,255 | 139 | 480 | 565 | 0.1% |
| Q4 2018 | 1,457 | $420.7B | 1,981,549,806 | 11 | 26 | 24 | 0.2% |