Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionJustInvest LLC
Latest Disclosed Ownership52,860 shares
Latest Disclosed Value $ 25,982,276
JustInvest LLC reports 1.64% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On May 14, 2026 - JustInvest LLC filed a 13F-HR form disclosing ownership of 52,860 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $25,982,276 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 52,009 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 1.64% 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)
2026-05-14 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 52,860 851 1.64 25,982 -13.78 0.2550
2026-02-13 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 52,009 3,338 6.86 30,137 27.58 0.2940
2025-10-31 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 48,671 9,917 25.59 23,621 50.21 0.2419
2025-07-25 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 38,754 16 0.04 15,725 -18.42 0.1775
2025-05-14 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 38,738 2,894 8.07 19,276 3.38 0.2842
2025-02-10 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 35,844 -3,218 -8.24 18,647 -22.83 0.2816
2024-11-12 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 39,062 4,436 12.81 24,162 26.19 0.3891
2024-08-12 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 34,626 3,445 11.05 19,148 5.66 0.3646
2024-05-09 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 31,181 6,961 28.74 18,122 40.97 0.3889
2024-02-08 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 24,220 -884 -3.52 12,855 1.17 0.3336
2023-11-08 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 25,104 599 2.44 12,707 -0.62 0.3798
2023-07-28 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 24,505 -2,219 -8.30 12,785 -16.99 0.3917
2023-05-10 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 26,724 2,250 9.19 15,403 14.28 0.5350
2023-02-10 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 24,474 -2,525 -9.35 13,478 -1.58 0.5562
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 26,999 3,109 13.01 13,694 5.51 0.6193
2022-08-12 2022-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 23,890 5,860 32.50 12,979 21.88 0.6011
2022-08-09 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 23,890 5,860 12,979 0.6011
2022-05-16 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 18,030 3,777 26.50 10,649 11.98 0.5155
2022-02-23 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 14,253 3,932 38.10 9,510 61.27 0.5605
2021-11-09 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 10,321 1,237 13.62 5,897 28.67 0.5299
2021-08-11 2021-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 9,084 3,626 66.43 4,583 83.98 0.4798
2021-07-21 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,458 0 2,491 0.3791
2021-04-28 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,458 377 7.42 2,491 5.24 0.3771
2021-01-20 2020-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 5,081 842 19.86 2,367 26.44 0.5149
2020-10-26 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 4,239 1,797 73.59 1,872 111.53 0.5253
2020-07-27 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,442 652 36.42 885 74.21 0.4014
2020-05-13 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,790 1,790 508 0.2962
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.