Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionNational Asset Management, Inc.
Latest Disclosed Ownership2,954 shares
Latest Disclosed Value $ 1,418,297
National Asset Management, Inc. reports 36.39% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On April 24, 2026 - National Asset Management, Inc. filed a 13F-HR form disclosing ownership of 2,954 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $1,418,297 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 4,644 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -36.39% 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)
2026-04-24 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,954 -1,690 -36.39 1,418 -47.31 0.0898
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,644 -147 -3.07 2,691 15.84 0.1242
2025-10-31 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 4,791 -856 -15.16 2,324 1.49 0.1075
2025-08-19 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,647 -11,971 -67.95 2,290 -75.04 0.1075
2025-02-25 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 17,618 -1,547 -8.07 9,172 -21.43 0.3006
2024-12-13 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 19,165 -2,647 -12.14 11,674 -3.29 0.3247
2024-12-13 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 19,165 -2,647 11,674 0.3247
2024-08-19 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 21,812 -8,144 -27.19 12,070 -20.45 0.3073
2024-05-16 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 29,956 2,586 9.45 15,173 4.38 0.4104
2024-03-15 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 27,370 -2,586 -8.63 14,537 -4.19 0.3914
2023-12-01 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 29,956 -1,175 -3.77 15,173 -6.64 0.4104
2023-07-27 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 31,131 -2,328 -6.96 16,253 -15.77 0.3646
2023-05-17 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 33,459 -5,738 -14.64 19,295 -10.65 0.5141
2023-03-15 2022-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 39,197 -1,515 -3.72 21,597 4.59 0.6051
2023-02-21 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 39,197 -1,515 21,597 0.5435
2022-11-22 2022-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 40,712 18,716 85.09 20,649 72.81 0.6236
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 40,712 18,716 20,649 0.2996
2022-08-12 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 21,996 -470 -2.09 11,949 -9.95 0.5028
2022-05-02 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 22,466 395 1.79 13,270 -9.90 0.4344
2022-01-28 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 22,071 739 3.46 14,728 21.78 0.4243
2021-11-16 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 21,332 898 4.39 12,094 17.96 0.3847
2021-08-10 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 20,434 3,778 22.68 10,253 34.71 0.3331
2021-05-13 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,656 7,139 75.01 7,611 71.69 0.2691
2021-02-04 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,517 -2,666 -21.88 4,433 -12.70 0.2371
2020-11-09 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,183 3,621 42.29 5,078 63.60 0.2707
2020-07-31 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,562 224 2.69 3,104 31.19 0.2073
2020-05-06 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,338 4,169 100.00 2,366 74.61 0.2019
2020-02-10 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,169 266 6.82 1,355 19.07 0.1153
2019-11-12 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,903 -827 -17.48 1,138 -18.19 0.1121
2019-08-05 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 4,730 1,098 30.23 1,391 39.66 0.1524
2019-05-08 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,632 180 5.21 996 28.68 0.1244
2019-02-08 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,452 -310 -8.24 774 -15.87 0.1102
2018-11-08 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,762 89 2.42 920 20.58 0.1095
2018-10-04 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,673 174 4.97 763 5.39 0.1008
2018-05-15 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,499 285 8.87 724 18.30 0.1014
2018-02-15 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,214 81 2.59 612 2.86 0.0827
2017-11-13 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,133 47 1.52 595 10.19 0.0989
2017-08-15 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,086 181 6.23 540 20.81 0.0979
2017-05-15 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,905 172 6.29 447 15.80 0.0891
2017-02-14 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,733 -210 -7.14 386 -17.70 0.0785
2016-11-14 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,943 48 1.66 469 9.32 0.0920
2016-08-15 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,895 -320 -9.95 429 -5.71 0.0859
2016-05-16 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,215 28 0.88 455 0.44 0.1052
2016-02-16 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,187 -15 -0.47 453 15.56 0.0917
2015-11-16 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,202 247 8.36 392 1.82 0.0942
2015-08-17 2015-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 2,955 608 25.91 385 21.84 0.0957
2015-08-14 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,955 385
2015-05-14 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,347 168 7.71 316 15.75 0.0770
2015-02-18 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,179 17 0.79 273 3.80 0.0058
2014-11-20 2014-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 2,162 -2,197 -50.40 263 -6.74 0.0684
2014-08-14 2014-06-30 13F Thermo Fisher Scientific Mid Growth 883556102 4,359 2,384 120.71 282 18.99 0.0663
2014-05-02 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,975 1,975 237 0.0716
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.