Thermo Fisher Scientific Inc.
CL ˙ SNSE ˙ US8835561023
SecurityCL:TMOCL / Thermo Fisher Scientific Inc.
InstitutionState Street Corp
Latest Disclosed Ownership16,731,668 shares
Latest Disclosed Value $ 8,231,823,950
State Street Corp reports 0.71% increase in ownership of TMOCL / Thermo Fisher Scientific Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 16,731,668 shares of Thermo Fisher Scientific Inc. (CL:TMOCL) valued at $8,231,823,950 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 16,613,761 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 0.71% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,731,668 117,907 0.71 8,231,824 -14.55 0.2842
2026-02-13 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,613,761 229,630 1.40 9,633,991 21.13 0.3232
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,384,131 -96,834 -0.59 7,953,601 18.90 0.2758
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,480,965 -58,524 -0.35 6,689,420 -18.79 0.2507
2025-05-15 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,539,489 91,461 0.56 8,237,069 -3.80 0.3394
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,448,028 129,067 0.79 8,562,818 -15.23 0.3378
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,318,961 124,996 0.77 10,100,655 12.71 0.4110
2024-08-14 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,193,965 -389,979 -2.35 8,961,514 -7.09 0.3916
2024-05-15 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,583,944 107,060 0.65 9,645,152 10.21 0.4311
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,476,884 835,295 5.34 8,751,373 10.46 0.4257
2023-11-14 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 15,641,589 -475,367 -2.95 7,922,734 -5.85 0.4393
2023-08-14 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,116,956 55,458 0.35 8,414,693 -9.16 0.4419
2023-05-15 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,061,498 -223,763 -1.37 9,262,847 3.23 0.5227
2023-05-15 2022-12-31 13F/A-99 THERMO FISHER SCIENTIFIC COM 883556102 16,285,261 126,385 0.78 8,972,986 9.42 0.5272
2023-05-15 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,285,261 126,385 8,972,986 0.5272
2022-11-15 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,158,876 135,437 0.85 8,200,398 -5.85 0.5187
2022-08-15 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,023,439 -194,196 -1.20 8,709,959 -9.12 0.5219
2022-05-16 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,217,635 -5,538 -0.03 9,583,647 -11.50 0.4739
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,223,173 529,712 3.38 10,828,875 20.72 0.5135
2021-11-15 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 15,693,461 139,803 0.90 8,970,235 14.27 0.4741
2021-08-16 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 15,553,658 318,930 2.09 7,850,342 12.84 0.4138
2021-07-09 2021-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 15,234,728 -544,269 -3.45 6,956,774 -5.39 0.3989
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 15,234,728 -544,269 6,956,774 0.3989
2021-02-16 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 15,778,997 -515,227 -3.16 7,352,998 2.16 0.4502
2020-11-10 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,294,224 -268,082 -1.62 7,197,810 19.87 0.4914
2020-08-14 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,562,306 58,542 0.35 6,004,838 28.20 0.4365
2020-06-19 2020-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 16,503,764 165,895 1.02 4,684,029 -11.80 0.4096
2020-05-11 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,503,764 165,895 4,684,029 411,352.0603
2020-02-06 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,337,869 224,799 1.40 5,310,745 13.08 0.3637
2019-11-14 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,113,070 -125,719 -0.77 4,696,301 -1.59 0.3500
2019-08-14 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,238,789 -168,307 -1.03 4,772,066 6.19 0.3558
2019-05-15 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,407,096 775,253 4.96 4,494,035 28.37 0.3506
2019-02-12 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 15,631,843 96,199 0.62 3,500,878 -7.68 0.3187
2018-11-09 2018-09-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,535,644 758,451 5.13 3,791,953 23.88 0.2912
2018-08-14 2018-06-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 14,777,193 -305,305 -2.02 3,060,948 -1.70 0.2559
2018-05-15 2018-03-31 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,082,498 -862,415 -5.41 3,113,932 2.85 0.2644
2018-02-14 2017-12-31 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,944,913 157,424 1.00 3,027,641 1.36 0.2435
2017-11-14 2017-09-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,787,489 -176,208 -1.10 2,986,995 7.25 0.2577
2017-08-14 2017-06-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,963,697 -122,257 -0.76 2,785,189 12.72 0.2464
2017-05-15 2017-03-31 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 16,085,954 164,367 1.03 2,470,802 9.98 0.2204
2017-02-09 2016-12-31 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,921,587 586,414 3.82 2,246,531 -7.90 0.2114
2017-01-13 2016-09-30 13F/A-1 THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,335,173 324,006 2.16 2,439,222 9.97 0.2458
2016-11-14 2016-09-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 11,039,241 1,755,911
2016-08-12 2016-06-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,011,167 -114,377 -0.76 2,218,047 3.57 0.2383
2016-05-20 2016-03-31 13F/A-1 THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,125,544 -255,388 -1.66 2,141,621 -1.84 0.2315
2016-05-12 2016-03-31 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,125,544 2,141,621
2016-02-16 2015-12-31 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,380,932 59,041 0.39 2,181,783 16.45 0.2385
2015-11-16 2015-09-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,321,891 -129,178 -0.84 1,873,559 -6.55 0.2181
2015-08-13 2015-06-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,451,069 -593,779 -3.70 2,004,933 -6.98 0.2143
2015-05-15 2015-03-31 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 16,044,848 -912,606 -5.38 2,155,462 1.45 0.2212
2015-02-11 2014-12-31 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 16,957,454 980,025 6.13 2,124,605 9.27 0.2116
2014-11-12 2014-09-30 13F/A-1 THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,977,429 316,177 2.02 1,944,449 5.22 0.2092
2014-11-10 2014-09-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,977,429 1,944,449
2014-08-12 2014-06-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,661,252 426,870 2.80 1,848,028 0.89 0.1996
2014-05-15 2014-03-31 13F/A-1 THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,234,382 620,417 4.25 1,831,770 12.57 0.2082
2014-05-13 2014-03-31 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 15,234,382 1,831,770
2014-02-06 2013-12-31 13F/A-1 THERMO FISHER SCIENTIFIC Common equity shares 883556102 14,613,965 313,710 2.19 1,627,273 23.49 0.1810
2014-02-06 2013-12-31 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 14,507,059 925,262
2013-11-12 2013-09-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 14,300,255 -725 -0.01 1,317,777 8.88 0.1624
2013-08-08 2013-06-30 13F THERMO FISHER SCIENTIFIC Common equity shares 883556102 14,300,980 14,300,980 1,210,283 0.1578
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.