Thermo Fisher Scientific Inc.
CL ˙ SNSE ˙ US8835561023
SecurityCL:TMOCL / Thermo Fisher Scientific Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership660,258 shares
Latest Disclosed Value $ 324,558,374
Janus Henderson Group Plc reports 39.81% decrease in ownership of TMOCL / Thermo Fisher Scientific Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 660,258 shares of Thermo Fisher Scientific Inc. (CL:TMOCL) valued at $324,558,374 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,096,959 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -39.81% 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)
2026-05-18 2026-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 660,258 -436,701 -39.81 324,558 -48.94 0.0547
2026-05-15 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 660,258 -436,701 -39.81 324,558 -48.94 0.0602
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,096,959 -140,903 -11.38 635,635 5.87 0.2846
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,237,862 29,952 2.48 600,369 22.59 0.2741
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,207,910 107,636 9.78 489,751 -11.00 0.2400
2025-05-15 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,100,274 53,403 5.10 550,312 1.05 0.3016
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,046,871 92,668 9.71 544,615 -7.73 0.2768
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 954,203 -29,855 -3.03 590,222 8.47 0.3021
2024-08-14 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 984,058 -339,005 -25.62 544,151 -29.23 0.2914
2024-05-15 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,323,063 -24,573 -1.82 768,947 7.49 0.4194
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,347,636 -165,204 -10.92 715,335 -6.59 0.4267
2023-11-14 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,512,840 30,947 2.09 765,766 -0.96 0.5015
2023-08-14 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,481,893 -1,160 -0.08 773,159 -9.55 0.4808
2023-05-15 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,483,053 -60,823 -3.94 854,779 0.54 0.5636
2023-02-14 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,543,876 -3,952 -0.26 850,208 8.29 0.6073
2023-01-13 2022-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 1,547,828 -127,051 -7.59 785,129 -13.73 0.5882
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,547,828 -127,051 785,129 0.5878
2022-08-15 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,674,879 -9,769 -0.58 910,100 -8.55 0.6275
2022-05-16 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,684,648 -154,254 -8.39 995,139 -18.90 0.4805
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,838,902 -26,038 -1.40 1,227,020 15.16 0.5118
2021-11-16 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,864,940 -18,159 -0.96 1,065,470 12.16 0.4660
2021-08-16 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,883,099 -261,486 -12.19 949,984 -2.95 0.4066
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,144,585 -75,092 -3.38 978,815 -5.32 0.4469
2021-02-16 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,219,677 -371,817 -14.35 1,033,841 -9.64 0.4803
2020-11-16 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,591,494 -73,055 -2.74 1,144,126 18.52 0.5965
2020-08-14 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,664,549 138,112 5.47 965,374 34.75 0.5419
2020-05-14 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,526,437 -252,089 -9.07 716,442 -20.62 0.4931
2020-02-18 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,778,526 -403,452 -12.68 902,594 -2.61 0.4621
2019-11-14 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,181,978 195,062 6.53 926,813 5.66 0.5020
2019-07-31 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,986,916 555,802 22.86 877,186 31.82 0.4777
2019-04-30 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,431,114 30,018 1.25 665,431 23.84 0.3688
2019-02-06 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,401,096 366,942 18.04 537,335 8.23 0.3427
2018-11-09 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,034,154 -2,505 -0.12 496,486 17.68 0.2653
2018-08-10 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,036,659 34,401 1.72 421,880 2.05 0.2405
2018-05-14 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,002,258 -25,121 -1.24 413,387 7.38 0.2436
2018-03-12 2017-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 2,027,379 33,782 1.69 384,976 2.07 0.2371
2018-02-09 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,027,379 33,782 384,976
2017-11-14 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,993,597 -348,449 -14.88 377,185 -7.69 0.2417
2017-08-17 2017-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 2,342,046 2,233,522 2,058.09 408,620 2,351.52 0.2785
2017-08-14 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,342,046 2,233,522 408,620
2017-05-03 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 108,524 11,434 11.78 16,668 21.65 0.1170
2017-01-30 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 97,090 45,544 88.36 13,702 67.14 0.1011
2016-10-24 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 51,546 -1,768 -3.32 8,198 4.08 0.0604
2016-07-29 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 53,314 -1,880 -3.41 7,877 0.82 0.0655
2016-05-12 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 55,194 0 0.00 7,813 -0.20 0.0634
2016-02-03 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 55,194 0 0.00 7,829 16.02 0.0628
2015-11-16 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 55,194 -2,728 -4.71 6,748 -10.21 0.0594
2015-08-17 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 57,922 -6,651 -10.30 7,515 -13.35 0.0591
2015-06-02 2015-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 64,573 -1,041 -1.59 8,673 5.49 0.0669
2015-05-15 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 64,573 8,673
2015-02-12 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 65,614 0 0.00 8,222 2.96 0.0593
2014-11-12 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 65,614 0 0.00 7,986 3.14 0.0751
2014-08-13 2014-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 65,614 0 0.00 7,743 -1.86 0.0723
2014-05-08 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 65,614 3,880 6.29 7,890 14.78 0.0768
2014-01-14 2013-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 61,734 2,786 4.73 6,874 26.50 0.0695
2013-11-12 2013-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 58,948 0 0.00 5,434 6.76 0.0599
2013-08-15 2013-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 58,948 58,948 5,090 0.0595
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.