Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionFirst American Bank
Latest Disclosed Ownership28,745 shares
Latest Disclosed Value $ 14,129,029
First American Bank reports 6.00% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On April 20, 2026 - First American Bank filed a 13F-HR form disclosing ownership of 28,745 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $14,129,029 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 30,580 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -6.00% 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)
2026-04-20 2026-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 28,745 -1,835 -6.00 14,129 -20.26 0.4356
2026-01-20 2025-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 30,580 1,084 3.68 17,720 23.86 1.0736
2025-10-20 2025-09-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 29,496 6,814 30.04 14,306 55.57 0.8989
2025-07-16 2025-06-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 22,682 -6,925 -23.39 9,197 -37.58 0.6305
2025-04-22 2025-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 29,607 991 3.46 14,732 -1.03 1.0898
2025-02-05 2024-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 28,616 431 1.53 14,887 -14.62 1.0488
2024-10-24 2024-09-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 28,185 194 0.69 17,434 12.63 1.2527
2024-07-30 2024-06-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 27,991 46 0.16 15,479 -4.69 1.1587
2024-07-31 2024-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 27,945 655 2.40 16,242 12.12 1.2266
2024-07-31 2023-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 27,290 -72 -0.26 14,485 4.59 1.2102
2024-07-31 2023-09-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 27,362 364 1.35 13,850 -1.68 1.2525
2024-07-31 2023-06-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 26,998 750 2.86 14,086 -6.89 1.2204
2024-07-31 2023-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 26,248 -601 -2.24 15,129 2.32 1.3871
2024-07-31 2022-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 26,849 259 0.97 14,785 9.63 1.4181
2024-07-31 2022-09-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 26,590 656 2.53 13,486 -4.28 1.4089
2024-07-31 2022-06-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,934 122 0.47 14,089 -7.58 1.4345
2024-07-31 2022-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,812 -148 -0.57 15,246 -11.99 1.2904
2022-02-07 2021-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,960 647 2.56 17,321 19.77 0.9154
2021-10-28 2021-09-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,313 307 1.23 14,462 14.64 0.8361
2021-07-13 2021-06-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,006 -725 -2.82 12,615 7.42 0.7336
2021-04-08 2021-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,731 767 3.07 11,744 1.01 0.7363
2021-01-06 2020-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 24,964 -2,535 -9.22 11,627 -4.23 0.7777
2020-10-09 2020-09-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 27,499 -235 -0.85 12,141 20.81 0.7190
2020-07-13 2020-06-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 27,734 644 2.38 10,050 30.83 0.6331
2020-04-07 2020-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 27,090 416 1.56 7,682 -11.34 0.5725
2020-01-24 2019-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 26,674 1,228 4.83 8,665 15.95 0.5426
2019-07-19 2019-06-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,446 -224 -0.87 7,473 6.36 0.5131
2019-04-02 2019-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,670 -15 -0.06 7,026 22.23 0.5069
2019-01-18 2018-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,685 493 1.96 5,748 -6.52 0.4498
2018-10-16 2018-09-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,192 -1,026 -3.91 6,149 13.60 0.4234
2018-04-18 2018-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 26,218 629 2.46 5,413 11.40 0.4097
2018-01-23 2017-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,589 -4 -0.02 4,859 0.35 0.3688
2017-10-06 2017-09-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 25,593 -1,177 -4.40 4,842 3.66 0.3681
2017-07-10 2017-06-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 26,770 3,282 13.97 4,671 29.46 0.3710
2017-04-11 2017-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 23,488 7,596 47.80 3,608 60.93 0.2934
2017-01-20 2016-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 15,892 -3,921 -19.79 2,242 -28.87 0.1886
2016-10-06 2016-09-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 19,813 7,993 67.62 3,152 80.42 0.2889
2016-07-20 2016-06-30 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 11,820 6,901 140.29 1,747 151.01 0.1680
2016-04-06 2016-03-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 4,919 2,244 83.89 696 83.64 0.0690
2016-01-14 2015-12-31 13F THERMO FISHER SCIENTIFIC COMMON STOCK 883556102 2,675 2,675 379 0.0385
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.