Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionComerica Bank
Latest Disclosed Ownership88,308 shares
Latest Disclosed Value $ 51,169,980
Comerica Bank reports 4.11% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On January 29, 2026 - Comerica Bank filed a 13F-HR form disclosing ownership of 88,308 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $51,169,980 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 92,095 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -4.11% 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)
2026-01-29 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 88,308 -3,787 -4.11 51,170 14.56 0.2042
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 92,095 -3,206 -3.36 44,668 15.60 0.1680
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 95,301 -7,730 -7.50 38,641 -24.63 0.1500
2025-05-14 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 103,031 -7,825 -7.06 51,268 -11.10 0.2153
2025-02-14 2024-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 110,856 -5,782 -4.96 57,671 -20.07 0.2326
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 110,856 -5,782 57,671 0.1932
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 116,638 4,362 3.89 72,149 16.20 0.2854
2024-08-15 2024-06-30 13F THERMO FISHER SCIENTIFIC INC SR COMMON 883556102 112,276 -2,743 -2.38 62,089 -7.12 0.2584
2024-05-16 2024-03-31 13F THERMO FISHER SCIENTIFIC COMMON 883556102 115,019 -10 -0.01 66,850 9.49 0.2881
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COMMON 883556102 115,029 366 0.32 61,056 5.20 0.2812
2023-11-21 2023-09-30 13F THERMO FISHER SCIENTIFIC COMMON 883556102 114,663 75,448 192.40 58,039 0.3023
2023-08-22 2023-06-30 13F THERMO FISHER SCIENTIFIC INC SR EQU 883556102 39,215 -38,677 -49.65 0 -100.00 0.0063
2023-01-26 2022-12-31 13F THERMO FISHER SCIENTIFIC INC SR COM 883556102 77,892 -3,070 -3.79 46 -99.89 0.3560
2022-10-28 2022-09-30 13F THERMO FISHER SCIENTIFIC INC SR COM 883556102 80,962 35 0.04 40,886 -5.89 0.3447
2022-08-02 2022-06-30 13F THERMO FISHER SCIENTIFIC INC SR COM 883556102 80,927 -871 -1.06 43,447 -10.15 0.3568
2022-04-27 2022-03-31 13F THERMO FISHER SCIENTIFIC INC SR COM 883556102 81,798 -1,018 -1.23 48,355 2.84 0.3509
2022-02-18 2021-12-31 13F THERMO FISHER SCIENTIFIC INC SR COM 883556102 82,816 -2,395 -2.81 47,020 -9.83 0.3461
2021-11-22 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 85,211 -16,848 -16.51 52,146 -7.42 0.3140
2021-08-26 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 102,059 -6,209 -5.73 56,324 6.59 0.3363
2021-04-28 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 108,268 -4,635 -4.11 52,844 -9.04 0.3151
2021-01-28 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 112,903 -9,418 -7.70 58,099 -1.08 0.3687
2020-10-30 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 122,321 -356 -0.29 58,735 16.56 0.4264
2020-07-31 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 122,677 6,275 5.39 50,391 31.70 0.3882
2020-05-01 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 116,402 689 0.60 38,261 3.38 0.3510
2020-02-07 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 115,713 -4,526 -3.76 37,011 4.90 0.2804
2019-10-31 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 120,239 652 0.55 35,283 2.80 0.2788
2019-08-02 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 119,587 1,381 1.17 34,321 4.12 0.2749
2019-05-02 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 118,206 -9,435 -7.39 32,962 9.01 0.2672
2019-02-06 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 127,641 1,408 1.12 30,238 7.26 0.2568
2018-11-01 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 126,233 -22,088 -14.89 28,192 -9.94 0.2274
2018-08-01 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 148,321 -1,361 -0.91 31,302 -3.62 0.2189
2018-05-01 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 149,682 -3,491 -2.28 32,479 -1.52 0.2320
2018-02-02 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 153,173 -4,416 -2.80 32,981 8.99 0.2197
2017-11-06 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 157,589 899 0.57 30,260 6.02 0.2190
2017-08-03 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 156,690 1,165 0.75 28,542 10.09 0.2136
2017-05-03 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 155,525 6,328 4.24 25,927 18.79 0.1968
2017-02-08 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 149,197 10,161 7.31 21,826 0.19 0.1727
2016-08-11 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 139,036 6,224 4.69 21,784 12.85 0.1882
2016-05-11 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 132,812 4,056 3.15 19,303 11.75 0.1724
2016-02-05 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 128,756 -4,519 -3.39 17,274 6.00 0.1695
2015-11-12 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 133,275 -136,025 -50.51 16,296 -53.37 0.1543
2015-08-13 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 269,300 132,077 96.25 34,944 89.56 0.1500
2015-05-15 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 137,223 -141,827 -50.82 18,434 -47.28 0.1561
2015-02-13 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 279,050 139,619 100.13 34,964 106.05 0.1512
2014-10-21 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 139,431 -7,097 -4.84 16,969 -1.86 0.1498
2014-08-12 2014-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 146,528 -10,717 -6.82 17,291 -8.55 0.1470
2014-05-15 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 157,245 11,001 7.52 18,908 16.11 0.1448
2014-02-11 2013-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 146,244 -30,780 -17.39 16,284 -0.18 0.1262
2013-11-12 2013-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 177,024 -5,992 -3.27 16,313 5.32 0.1135
2013-08-13 2013-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 183,016 183,016 15,489 0.1263
2013-08-08 2013-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,404,404 118,856
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.