Thermo Fisher Scientific Inc.
CL ˙ SNSE ˙ US8835561023
SecurityCL:TMOCL / Thermo Fisher Scientific Inc.
InstitutionFmr Llc
Latest Disclosed Ownership10,776,436 shares
Latest Disclosed Value $ 5,296,941,734
Fmr Llc reports 10.04% increase in ownership of TMOCL / Thermo Fisher Scientific Inc.

On May 15, 2026 - Fmr Llc filed a 13F-HR form disclosing ownership of 10,776,436 shares of Thermo Fisher Scientific Inc. (CL:TMOCL) valued at $5,296,941,734 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 9,793,347 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 10.04% 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.

Upgrade to unlock premium data and export to Excel .

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 10,776,436 983,089 10.04 5,296,942 -6.66 0.2790
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,793,347 2,199,538 28.96 5,674,756 54.07 0.2893
2025-11-13 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,593,809 3,602,808 90.27 3,683,149 127.61 0.1915
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,991,001 -651,544 -14.03 1,618,191 -29.95 0.0913
2025-05-12 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,642,545 -1,694,832 -26.74 2,310,130 -29.93 0.1475
2025-02-13 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,337,377 -1,540,082 -19.55 3,296,893 -32.34 0.1968
2024-11-13 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,877,459 1,294,453 19.66 4,872,761 33.85 0.2965
2024-08-13 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,583,006 -334,967 -4.84 3,640,403 -9.46 0.2330
2024-05-13 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,917,973 -931,572 -11.87 4,020,796 -3.50 0.2699
2024-02-13 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,849,545 -470,479 -5.65 4,166,460 -1.07 0.3200
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,320,024 -890,117 -9.66 4,211,347 -12.36 0.3640
2023-08-11 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,210,141 -2,143,903 -18.88 4,805,391 -26.57 0.4029
2023-08-11 2023-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 11,354,044 194,602 1.74 6,544,130 6.49 0.5986
2023-05-11 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,354,044 194,602 6,544,130 0.5986
2023-02-13 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,159,442 187,914 1.71 6,145,393 10.44 0.6104
2022-11-10 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 10,971,528 987,695 9.89 5,564,649 2.59 0.5803
2022-08-12 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,983,833 -316,878 -3.08 5,424,017 -10.85 0.5405
2022-05-13 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 10,300,711 -800,254 -7.21 6,084,115 -17.86 0.4861
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,100,965 -313,678 -2.75 7,407,009 13.58 0.5469
2022-02-14 2021-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 11,414,643 1,279,984 12.63 6,521,527 27.56 0.5172
2021-11-15 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,414,643 1,279,984 6,521,527 0.5171
2021-08-13 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 10,134,659 -1,840,322 -15.37 5,112,632 -6.45 0.4005
2021-05-14 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,974,981 -1,048,006 -8.05 5,465,142 -9.90 0.4667
2021-02-08 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,022,987 686,768 5.57 6,065,847 11.37 0.5397
2020-11-13 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,336,219 715,208 6.15 5,446,688 29.35 0.5505
2020-08-24 2020-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 11,621,011 376,531 3.35 4,210,756 32.04 0.4630
2020-08-13 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,621,011 376,531 4,210,756 103,445.9527
2020-05-14 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,244,480 -1,251,745 -10.02 3,188,934 -21.45 0.4416
2020-02-07 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,496,225 -191,300 -1.51 4,059,649 9.85 0.4479
2019-11-13 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,687,525 240,837 1.93 3,695,495 1.10 0.4432
2019-08-13 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,446,688 874,107 7.55 3,655,343 15.40 0.4269
2019-05-13 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,572,581 2,900,868 33.45 3,167,647 63.23 0.3795
2019-02-13 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,671,713 2,172,574 33.43 1,940,642 22.34 0.2658
2018-11-09 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,499,139 1,016,082 18.53 1,586,310 39.67 0.1785
2018-08-10 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,483,057 -637,773 -10.42 1,135,761 -10.12 0.1341
2018-05-14 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,120,830 837,692 15.86 1,263,707 25.97 0.1500
2018-02-12 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,283,138 -874,564 -14.20 1,003,163 -13.89 0.1176
2017-11-13 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,157,702 2,567,657 71.52 1,165,038 86.00 0.1409
2017-08-29 2017-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 3,590,045 -65,002 -1.78 626,355 11.57 0.0779
2017-08-11 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,590,045 -65,002 626,355
2017-05-11 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,655,047 -1,232,458 -25.22 561,415 -18.59 0.0713
2017-02-10 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,887,505 -3,006,181 -38.08 689,627 -45.07 0.0922
2016-11-14 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,893,686 -322,959 -3.93 1,255,570 3.42 0.1672
2016-08-11 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,216,645 834,858 11.31 1,214,093 16.16 0.1657
2016-05-16 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,381,787 -821,794 -10.02 1,045,186 -10.18 0.1446
2016-02-12 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,203,581 -1,132,421 -12.13 1,163,679 1.93 0.1566
2015-11-10 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,336,002 -2,158,889 -18.78 1,141,606 -23.46 0.1625
2015-08-25 2015-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 11,494,891 -1,186,866 -9.36 1,491,576 -12.45 0.1912
2015-08-13 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,494,891 1,491,576
2015-05-14 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,681,757 33,359 0.26 1,703,667 7.51 0.2170
2015-02-17 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,648,398 1,645,184 14.95 1,584,718 18.34 0.2062
2014-11-14 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,003,214 -852,498 -7.19 1,339,092 -4.28 0.1814
2014-08-14 2014-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,855,712 -1,922,385 -13.95 1,398,974 -15.56 0.1875
2014-05-15 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,778,097 126,762 0.93 1,656,679 8.99 0.2300
2014-02-13 2013-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,651,335 1,492,208 12.27 1,520,076 35.66 0.2148
2013-11-14 2013-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,159,127 3,238,896 36.31 1,120,464 48.42 0.1717
2013-09-24 2013-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 8,920,231 8,920,231 754,920 0.1236
2013-08-14 2013-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,920,231 754,920 0.1236
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.