THERMO FISHER SCIENTIFIC INC (TMO) Institutional Shareholders
THERMO FISHER SCIENTIFIC INC (TMO) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $154.47B in TMO holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of TMO tracked by InsiderSet, reporting ownership valued at approximately $14.96B in its March 31, 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 $17.47B, representing an estimated gain of +16.84% 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
2,550
Total Reported Value
$154.47B
Largest Holder
Blackrock, Inc.
Largest Position
$14.96B
Insider Transactions (90d)
12
Latest Filing Quarter
Q2 2026
New Institutional Positions
28
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.26% | 30,427,192 | $14,955,877,586 | $17,474,336,366 | +$2,518,458,780 | +16.84% | |
| Vanguard Capital Management Llc | 0.30% | 24,280,816 | $11,934,749,488 | $13,944,472,629 | +$2,009,723,141 | +16.84% | |
| State Street Corp | 0.28% | 16,731,668 | $8,231,823,950 | $9,608,996,932 | +$1,377,172,982 | +16.73% | |
| Morgan Stanley | 0.32% | 10,863,528 | $5,339,751,925 | $6,238,924,130 | +$899,172,205 | +16.84% | |
| Fmr Llc | 0.28% | 10,776,436 | $5,296,941,734 | $6,188,907,195 | +$891,965,461 | +16.84% | |
| Geode Capital Management, Llc | 0.26% | 8,407,891 | $4,114,007,288 | $4,828,651,801 | +$714,644,513 | +17.37% | |
| Franklin Resources Inc | 0.82% | 6,813,031 | $3,348,809,232 | $3,912,723,703 | +$563,914,471 | +16.84% | |
| Capital World Investors | 0.45% | 6,646,316 | $3,266,681,244 | $3,816,979,279 | +$550,298,035 | +16.85% | |
| Vanguard Portfolio Management Llc | 0.16% | 6,163,370 | $3,029,481,256 | $3,539,623,391 | +$510,142,135 | +16.84% | |
| Bank Of America Corp | 0.20% | 5,533,403 | $2,719,834,040 | $3,177,833,343 | +$457,999,303 | +16.84% | |
| Massachusetts Financial Services Co | 0.76% | 3,013,109 | $2,250,880,850 | $1,730,428,499 | -$520,452,351 | -23.12% | |
| Capital Research Global Investors | 0.34% | 4,414,621 | $2,169,814,556 | $2,535,316,840 | +$365,502,284 | +16.84% | |
| Royal Bank Of Canada | 0.36% | 3,913,903 | $1,923,802,000 | $2,247,754,493 | +$323,952,493 | +16.84% | |
| Capital International Investors | 0.45% | 3,888,726 | $1,911,399,079 | $2,233,295,342 | +$321,896,263 | +16.84% | |
| Bank Of New York Mellon Corp | 0.34% | 3,766,614 | $1,851,404,374 | $2,163,166,420 | +$311,762,046 | +16.84% | |
| Northern Trust Corp | 0.22% | 3,415,610 | $1,678,874,784 | $1,961,584,823 | +$282,710,039 | +16.84% | |
| Storebrand Asset Management As | 0.56% | 3,280,174 | $1,668,933,952 | $1,883,803,928 | +$214,869,976 | +12.87% | |
| Goldman Sachs Group Inc | 0.20% | 3,157,226 | $1,551,871,239 | $1,813,194,892 | +$261,323,653 | +16.84% | |
| Charles Schwab Investment Management Inc | 0.22% | 2,934,842 | $1,442,562,888 | $1,685,479,761 | +$242,916,873 | +16.84% | |
| Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am Main | 1.31% | 2,914,918 | $1,432,764,301 | $1,674,037,407 | +$241,273,106 | +16.84% | |
| Fisher Asset Management, Llc | 0.48% | 2,851,579 | $1,401,637,491 | $1,637,661,820 | +$236,024,329 | +16.84% | |
| Alliancebernstein L.P. | 0.41% | 2,190,608 | $1,269,347,806 | $1,258,066,174 | -$11,281,632 | -0.89% | |
| Grantham, Mayo, Van Otterloo & Co. Llc | 3.15% | 2,502,206 | $1,229,910,332 | $1,437,016,906 | +$207,106,574 | +16.84% | |
| Ubs Group Ag | 0.21% | 2,453,453 | $1,205,945,753 | $1,409,018,058 | +$203,072,305 | +16.84% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.25% | 2,449,697 | $1,204,099,566 | $1,406,860,987 | +$202,761,421 | +16.84% | |
| Legal & General Group Plc | 0.27% | 2,370,531 | $1,165,187,097 | $1,361,395,953 | +$196,208,856 | +16.84% | |
| Invesco Ltd. | 0.17% | 2,235,720 | $1,098,923,262 | $1,283,973,996 | +$185,050,734 | +16.84% | |
| Vanguard Fiduciary Trust Co | 0.27% | 2,111,667 | $1,037,947,681 | $1,212,730,358 | +$174,782,677 | +16.84% | |
| Unisphere Establishment | 8.52% | 2,060,000 | $1,012,551,800 | $1,183,058,000 | +$170,506,200 | +16.84% | |
| Amundi | 0.27% | 2,016,260 | $991,052,278 | $1,157,938,118 | +$166,885,840 | +16.84% | |
| Primecap Management Co/Ca/ | 0.77% | 1,982,531 | $974,473,464 | $1,138,567,553 | +$164,094,089 | +16.84% | |
| 1832 Asset Management L.P. | 1.28% | 1,969,618 | $968,126,336 | $1,131,151,617 | +$163,025,281 | +16.84% | |
| Flossbach Von Storch Se | 4.48% | 1,954,070 | $960,484,027 | $1,122,222,401 | +$161,738,374 | +16.84% | |
| Edgepoint Investment Group Inc. | 7.56% | 1,918,997 | $943,244,595 | $1,102,079,977 | +$158,835,382 | +16.84% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.61% | 1,853,226 | $910,916,176 | $1,064,307,692 | +$153,391,516 | +16.84% | |
| Barclays Plc | 0.32% | 1,844,083 | $906,422,118 | $1,059,056,867 | +$152,634,749 | +16.84% | |
| Schroder Investment Management Group | 0.70% | 1,728,440 | $849,580,113 | $992,643,092 | +$143,062,979 | +16.84% | |
| Dimensional Fund Advisors Lp | 0.17% | 1,689,790 | $830,485,979 | $970,446,397 | +$139,960,418 | +16.85% | |
| Parnassus Endeavor Fund | Parnassus Investments | 2.20% | 1,639,589 | $822,024,341 | $941,615,963 | +$119,591,622 | +14.55% |
| Ameriprise Financial Inc | 0.19% | 1,670,400 | $821,090,809 | $959,310,720 | +$138,219,911 | +16.83% | |
| Viking Global Investors | Ole Andreas Halvorsen | 2.29% | 1,668,025 | $819,884,328 | $957,946,757 | +$138,062,429 | +16.84% |
| Nuveen, Llc | 0.22% | 1,646,989 | $809,544,503 | $945,865,783 | +$136,321,280 | +16.84% | |
| Clearbridge Investments, Llc | 0.69% | 1,610,697 | $791,705,711 | $925,023,287 | +$133,317,576 | +16.84% | |
| Wellington Management Group Llp | 0.14% | 1,478,251 | $726,604,714 | $848,959,549 | +$122,354,835 | +16.84% | |
| Wells Fargo & Company/Mn | 0.14% | 1,443,512 | $709,529,445 | $829,008,942 | +$119,479,497 | +16.84% | |
| Manufacturers Life Insurance Company, The | 0.60% | 1,423,710 | $699,793,872 | $817,636,653 | +$117,842,781 | +16.84% | |
| Loomis Sayles & Co L P | 0.90% | 1,363,758 | $670,327,969 | $783,206,219 | +$112,878,250 | +16.84% | |
| Swedbank Ab | 0.56% | 1,298,760 | $651,146,314 | $745,877,868 | +$94,731,554 | +14.55% | |
| Deutsche Bank Ag\ | 0.20% | 1,260,345 | $619,497,378 | $723,816,134 | +$104,318,756 | +16.84% | |
| Lazard Asset Management Llc | 0.99% | 1,222,057 | $600,677,604 | $701,827,335 | +$101,149,731 | +16.84% |
Frequently asked questions about TMO
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Who owns the most TMO stock?
The largest holders of TMO are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for THERMO FISHER SCIENTIFIC INC (TMO).
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Is TMO widely held by superinvestors?
Many widely followed stocks like TMO appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly TMO is represented among the institutional managers we track.
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What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.