Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionC WorldWide Group Holding A/S
Latest Disclosed Ownership591,542 shares
Latest Disclosed Value $ 290,761
C WorldWide Group Holding A/S reports 7.34% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 6, 2026 - C WorldWide Group Holding A/S filed a 13F-HR form disclosing ownership of 591,542 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $290,761 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 638,428 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -7.34% 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)
2026-05-06 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 591,542 -46,886 -7.34 291 -21.41 6.2409
2026-02-04 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 638,428 -112,675 -15.00 370 1.37 6.4570
2025-11-05 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 751,103 -136,346 -15.36 364 1.39 5.6148
2025-08-06 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 887,449 -146,214 -14.15 360 -30.16 4.8758
2025-05-05 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,033,663 -43,292 -4.02 514 -8.21 6.3833
2025-02-04 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,076,955 -83,371 -7.19 560 -21.90 6.8360
2024-11-05 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,160,326 -5,595 -0.48 718 11.34 7.4528
2024-07-31 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,165,921 -21,135 -1.78 645 -6.53 6.9776
2024-05-03 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,187,056 -7,800 -0.65 690 8.68 7.8635
2024-02-05 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,194,856 -134,109 -10.09 634 -5.65 8.5124
2023-11-03 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,328,965 -18,476 -1.37 673 -4.41 9.1871
2023-08-02 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,347,441 -48,798 -3.49 703 -12.56 9.0753
2023-05-02 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,396,239 -141,177 -9.18 805 -4.96 11.0207
2023-02-03 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,537,416 -12,261 -0.79 847 -99.89 11.2234
2022-11-03 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,549,677 -7,766 -0.50 785,980 -7.11 10.8278
2022-08-02 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,557,443 16,150 1.05 846,128 -7.06 10.6184
2022-05-04 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,541,293 -40,720 -2.57 910,365 -13.76 9.9196
2022-02-02 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,582,013 -56,049 -3.42 1,055,582 12.79 9.9667
2021-11-01 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,638,062 -22,780 -1.37 935,874 11.70 9.6054
2021-08-04 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,660,842 -298,417 -15.23 837,845 -6.30 8.6332
2021-05-04 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,959,259 -14,635 -0.74 894,167 -2.74 8.7544
2021-02-05 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,973,894 35,261 1.82 919,400 7.41 9.2100
2020-11-02 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,938,633 -15,452 -0.79 855,946 20.89 9.6265
2020-08-05 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,954,085 -46,312 -2.32 708,044 24.81 8.2648
2020-05-04 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,000,397 -53,477 -2.60 567,313 -14.98 7.9138
2020-02-05 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,053,874 -2,831 -0.14 667,243 11.38 7.9701
2019-11-04 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,056,705 -90,682 -4.22 599,056 -5.01 7.5955
2019-08-02 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,147,387 -72,916 -3.28 630,645 3.77 7.8394
2019-05-03 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,220,303 -35,970 -1.59 607,742 20.36 7.7116
2019-02-12 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,256,273 14,771 0.66 504,932 -7.71 7.3035
2018-11-05 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,241,502 4,945 0.22 547,106 18.09 7.0268
2018-08-03 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,236,557 -27,387 -1.21 463,280 -0.88 6.4278
2018-05-03 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,263,944 -13,164 -0.58 467,414 8.10 7.1764
2018-02-07 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,277,108 43,368 1.94 432,378 2.31 6.2507
2017-11-06 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,233,740 61,502 2.83 422,624 11.51 6.0074
2017-08-02 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,172,238 222,189 11.39 378,990 26.53 5.7547
2017-05-01 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,950,049 1,772,300 997.08 299,527 1,094.24 5.0715
2017-02-06 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 177,749 43,597 32.50 25,081 17.54 0.4839
2016-11-03 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 134,152 60,512 82.17 21,338 96.09 0.3761
2016-07-29 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 73,640 69,000 1,487.07 10,882 1,558.84 0.2083
2016-05-04 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,640 0 0.00 656 -0.30 0.0127
2016-02-08 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,640 -3,800 -45.02 658 -36.24 0.0115
2015-11-12 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,440 1,100 14.99 1,032 8.40 0.0174
2015-07-21 2015-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 7,340 6,450 724.72 952 693.33 0.0136
2015-07-21 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,340 952
2015-05-13 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 890 0 0.00 120 7.14 0.0017
2015-02-11 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 890 150 20.27 112 24.44 0.0017
2014-11-14 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 740 740 90 0.0013
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.