TMO Institutional Ownership & Shareholders
THERMO FISHER SCIENTIFIC INC (TMO) is currently held by 2,705 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $165.65B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of TMO tracked by InsiderSet, reporting ownership valued at approximately $15.50B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $21.55B, representing an estimated gain of +39.02% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 40% of the total disclosed TMO value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, State Street Corp, and several other long-term asset managers with concentrated positions in THERMO FISHER SCIENTIFIC INC (TMO).
This page ranks the largest institutional TMO shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
2,705
Total Reported Value
$165.65B
Largest Holder
Blackrock, Inc.
Largest Position
$15.50B
Insider Transactions (90d)
50
Latest Filing Quarter
Q2 2026
New Institutional Positions
59
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.23% | 30,919,632 | $15,501,866,869 | $21,550,983,504 | +$6,049,116,635 | +39.02% | |
| Vanguard Capital Management Llc | 0.26% | 24,276,316 | $12,171,173,789 | $16,920,592,252 | +$4,749,418,463 | +39.02% | |
| State Street Corp | 0.25% | 16,825,879 | $8,443,627,719 | $11,727,637,663 | +$3,284,009,944 | +38.89% | |
| Fmr Llc | 0.31% | 14,084,488 | $7,061,398,716 | $9,816,888,136 | +$2,755,489,420 | +39.02% | |
| Morgan Stanley | 0.29% | 10,763,066 | $5,396,172,492 | $7,501,857,002 | +$2,105,684,510 | +39.02% | |
| Jpmorgan Chase & Co | 0.25% | 8,503,527 | $4,306,357,475 | $5,926,958,319 | +$1,620,600,844 | +37.63% | |
| Geode Capital Management, Llc | 0.22% | 8,382,401 | $4,182,710,443 | $5,842,533,497 | +$1,659,823,054 | +39.68% | |
| Vanguard Portfolio Management Llc | 0.14% | 6,226,169 | $3,121,552,090 | $4,339,639,793 | +$1,218,087,703 | +39.02% | |
| Capital World Investors | 0.37% | 6,195,370 | $3,106,193,041 | $4,318,172,890 | +$1,211,979,849 | +39.02% | |
| Price T Rowe Associates Inc | 0.26% | 5,116,336 | $2,565,127,000 | $3,566,086,192 | +$1,000,959,192 | +39.02% | |
| Norges Bank | 0.25% | 5,087,903 | $2,550,871,048 | $3,546,268,391 | +$995,397,343 | +39.02% | |
| Massachusetts Financial Services Co | 0.72% | 2,965,714 | $2,276,759,119 | $2,067,102,658 | -$209,656,461 | -9.21% | |
| Capital Research Global Investors | 0.29% | 4,147,545 | $2,079,461,815 | $2,890,838,865 | +$811,377,050 | +39.02% | |
| Bank Of New York Mellon Corp | 0.32% | 3,938,410 | $1,974,561,448 | $2,745,071,770 | +$770,510,322 | +39.02% | |
| Bank Of America Corp | 0.13% | 3,895,265 | $1,952,930,190 | $2,714,999,705 | +$762,069,515 | +39.02% | |
| Royal Bank Of Canada | 0.29% | 3,430,798 | $1,720,064,000 | $2,391,266,206 | +$671,202,206 | +39.02% | |
| Northern Trust Corp | 0.19% | 3,328,836 | $1,668,945,218 | $2,320,198,692 | +$651,253,474 | +39.02% | |
| Capital International Investors | 0.33% | 3,182,151 | $1,595,416,232 | $2,217,959,247 | +$622,543,015 | +39.02% | |
| Charles Schwab Investment Management Inc | 0.21% | 3,114,527 | $1,561,499,257 | $2,170,825,319 | +$609,326,062 | +39.02% | |
| Dodge & Cox Stock Fund | V. D. Dodge, E. M. Cox | 0.80% | 3,054,778 | $1,531,543,498 | $2,129,180,266 | +$597,636,768 | +39.02% |
| Goldman Sachs Group Inc | 0.16% | 2,957,066 | $1,482,554,827 | $2,061,075,002 | +$578,520,175 | +39.02% | |
| Fisher Asset Management, Llc | 0.44% | 2,915,715 | $1,461,823,432 | $2,032,253,355 | +$570,429,923 | +39.02% | |
| Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am Main | 1.09% | 2,757,752 | $1,382,624,262 | $1,922,153,144 | +$539,528,882 | +39.02% | |
| Grantham, Mayo, Van Otterloo & Co. Llc | 3.09% | 2,739,191 | $1,373,321,891 | $1,909,216,127 | +$535,894,236 | +39.02% | |
| Ubs Group Ag | 0.20% | 2,521,208 | $1,264,032,845 | $1,757,281,976 | +$493,249,131 | +39.02% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.25% | 2,449,697 | $1,204,099,566 | $1,707,438,809 | +$503,339,243 | +41.80% | |
| Legal & General Group Plc | 0.23% | 2,238,613 | $1,122,351,013 | $1,560,313,261 | +$437,962,248 | +39.02% | |
| Edgepoint Investment Group Inc. | 8.26% | 2,179,650 | $1,092,789,324 | $1,519,216,050 | +$426,426,726 | +39.02% | |
| Invesco Ltd. | 0.09% | 2,179,010 | $1,092,468,383 | $1,518,769,970 | +$426,301,587 | +39.02% | |
| Vanguard Fiduciary Trust Co | 0.23% | 2,086,585 | $1,046,130,256 | $1,454,349,745 | +$408,219,489 | +39.02% | |
| Unisphere Establishment | 8.79% | 2,060,000 | $1,032,801,600 | $1,435,820,000 | +$403,018,400 | +39.02% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.56% | 2,012,934 | $1,009,204,590 | $1,403,014,998 | +$393,810,408 | +39.02% | |
| Primecap Management Co/Ca/ | 0.59% | 1,982,271 | $993,831,390 | $1,381,642,887 | +$387,811,497 | +39.02% | |
| Parnassus Endeavor Fund | Parnassus Investments | 2.92% | 1,463,282 | $987,788,514 | $1,019,907,554 | +$32,119,040 | +3.25% |
| Viking Global Investors | Ole Andreas Halvorsen | 2.77% | 1,937,415 | $971,342,384 | $1,350,378,255 | +$379,035,871 | +39.02% |
| Alliancebernstein L.P. | 0.30% | 1,849,037 | $908,857,157 | $1,288,778,789 | +$379,921,632 | +41.80% | |
| 1832 Asset Management L.P. | 1.06% | 1,721,443 | $863,062,662 | $1,199,845,771 | +$336,783,109 | +39.02% | |
| Dimensional Fund Advisors Lp | 0.16% | 1,712,845 | $858,828,758 | $1,193,852,965 | +$335,024,207 | +39.01% | |
| Clearbridge Investments, Llc | 0.70% | 1,691,069 | $847,834,531 | $1,178,675,093 | +$330,840,562 | +39.02% | |
| Temasek Holdings (Private) Ltd | 2.24% | 1,206,213 | $814,254,086 | $840,730,461 | +$26,476,375 | +3.25% | |
| Ameriprise Financial Inc | 0.16% | 1,547,342 | $775,851,866 | $1,078,497,374 | +$302,645,508 | +39.01% | |
| Schroder Investment Management Group | 0.54% | 1,525,255 | $764,701,846 | $1,063,102,735 | +$298,400,889 | +39.02% | |
| Nuveen, Llc | 0.18% | 1,513,180 | $758,647,435 | $1,054,686,460 | +$296,039,025 | +39.02% | |
| Wells Fargo & Company/Mn | 0.13% | 1,458,431 | $731,198,667 | $1,016,526,407 | +$285,327,740 | +39.02% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.40% | 1,042,381 | $703,659,294 | $726,539,557 | +$22,880,263 | +3.25% | |
| Barclays Plc | 0.21% | 1,354,112 | $678,897,592 | $943,816,064 | +$264,918,472 | +39.02% | |
| Manufacturers Life Insurance Company, The | 0.52% | 1,330,750 | $667,185,605 | $927,532,750 | +$260,347,145 | +39.02% | |
| Loomis Sayles & Co L P | 0.83% | 1,315,185 | $659,381,019 | $916,683,945 | +$257,302,926 | +39.02% | |
| Swedbank Ab | 0.56% | 975,770 | $658,693,541 | $680,111,690 | +$21,418,149 | +3.25% | |
| Flossbach Von Storch Se | 3.12% | 910,320 | $614,511,516 | $634,493,040 | +$19,981,524 | +3.25% |
Frequently asked questions about TMO
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Who are the largest institutional holders of TMO?
The largest institutional holders of TMO reported in the latest SEC Form 13F filings include Blackrock, Inc. , Vanguard Capital Management Llc , State Street Corp , Fmr Llc , and Morgan Stanley . InsiderSet ranks institutional holders by their latest reported TMO position.
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What is TMO institutional ownership?
This page tracks TMO positions reported by institutional investment managers through SEC Form 13F. THERMO FISHER SCIENTIFIC INC (TMO) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
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How many institutions own TMO?
InsiderSet currently tracks 2,705 institutional managers reporting TMO holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of TMO shareholders.
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How much TMO stock do institutions own?
Institutional investment managers disclosed approximately $165.65B in TMO holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
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When was TMO institutional ownership last updated?
The latest TMO institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
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Are institutional TMO holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its TMO position after the reporting date.
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Are institutions buying or selling TMO?
Institutional buying and selling can be analyzed by comparing TMO positions across consecutive 13F reporting periods. InsiderSet's TMO Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View TMO ownership changes.
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How has TMO institutional ownership changed over time?
InsiderSet tracks TMO institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.