Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionCarret Asset Management, Llc
Latest Disclosed Ownership8,246 shares
Latest Disclosed Value $ 4,053,156
Carret Asset Management, Llc reports 1.90% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 15, 2026 - Carret Asset Management, Llc filed a 13F-HR form disclosing ownership of 8,246 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $4,053,156 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 8,406 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -1.90% 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)
2026-05-15 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,246 -160 -1.90 4,053 -16.78 0.3968
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,406 -126 -1.48 4,871 17.69 0.4623
2025-11-13 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,532 -28 -0.33 4,138 19.25 0.4026
2025-08-04 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,560 540 6.73 3,471 -13.03 0.3708
2025-04-22 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,020 -38 -0.47 3,991 -4.82 0.4508
2025-02-10 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,058 93 1.17 4,192 -14.90 0.4591
2024-10-24 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,965 178 2.29 4,927 14.40 0.5345
2024-08-01 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,787 -20 -0.26 4,306 -5.09 0.5027
2024-04-19 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,807 -35 -0.45 4,538 9.01 0.5344
2024-02-02 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,842 -134 -1.68 4,162 3.10 0.5302
2023-10-12 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,976 0 0.00 4,037 -2.98 0.5626
2023-07-25 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,976 -85 -1.05 4,161 -10.44 0.5517
2023-05-11 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,061 -110 -1.35 4,646 116,050.00 0.6454
2023-01-10 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,171 -110 -1.33 4 -99.90 0.6219
2022-11-14 2022-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 8,281 -18 -0.22 4,200 -6.85 0.6267
2022-10-11 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,281 -18 4,200 0.6267
2022-08-04 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,299 -830 -9.09 4,509 -16.38 0.6254
2022-04-13 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,129 -14 -0.15 5,392 -11.62 0.6173
2022-01-10 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,143 -247 -2.63 6,101 13.72 0.6754
2021-10-27 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,390 -443 -4.51 5,365 8.17 0.6402
2021-07-14 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,833 -627 -5.99 4,960 3.90 0.5805
2021-07-14 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 10,460 -118 -1.12 4,774 -3.11 0.5921
2021-03-16 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 10,578 -68 -0.64 4,927 4.83 0.6634
2020-11-16 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 10,646 -235 -2.16 4,700 19.20 0.7106
2020-08-12 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 10,881 -10 -0.09 3,943 27.65 0.6396
2020-05-18 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 10,891 -935 -7.91 3,089 -19.60 0.5929
2020-02-13 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,826 -350 -2.87 3,842 8.32 0.5604
2019-11-13 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,176 -100 -0.81 3,547 -1.61 0.5628
2019-08-12 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,276 -88 -0.71 3,605 6.53 0.5727
2019-05-15 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,364 -583 -4.50 3,384 16.81 0.5520
2019-02-13 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,947 -85 -0.65 2,897 -8.93 0.5218
2018-11-13 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,032 -145 -1.10 3,181 16.56 0.4897
2018-08-08 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,177 -215 -1.61 2,729 -1.30 0.4459
2018-05-14 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,392 -151 -1.11 2,765 7.50 0.4549
2018-02-13 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,543 175 1.31 2,572 1.70 0.4001
2017-11-14 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,368 -460 -3.33 2,529 4.81 0.4082
2017-08-15 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,828 1,096 8.61 2,413 23.36 0.4050
2017-05-08 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,732 60 0.47 1,956 9.40 0.3510
2017-02-16 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,672 730 6.11 1,788 -5.89 0.3388
2016-11-10 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,942 -180 -1.48 1,900 6.09 0.3554
2016-08-10 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,122 426 3.64 1,791 8.15 0.3462
2016-05-17 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,696 -48 -0.41 1,656 -0.60 0.3515
2016-02-05 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,744 303 2.65 1,666 19.09 0.3555
2015-11-16 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,441 120 1.06 1,399 -4.77 0.3052
2015-08-12 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,321 -119 -1.04 1,469 -4.42 0.2918
2015-05-11 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,440 -215 -1.84 1,537 5.27 0.2986
2015-02-19 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,655 -300 -2.51 1,460 0.34 0.2763
2014-11-12 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,955 -600 -4.78 1,455 -1.82 0.2825
2014-08-14 2014-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,555 150 1.21 1,482 -0.67 0.2837
2014-05-15 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,405 175 1.43 1,492 9.54 0.2978
2014-02-14 2013-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,230 6,152 101.22 1,362 494.76 0.2783
2013-11-14 2013-09-30 13F JANUS FUND FD 471023101 6,078 0 0.00 229 8.02 0.0508
2013-11-14 2013-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 15,960 -4,450 1,471 0.3264
2013-08-15 2013-06-30 13F JANUS FUND FD 471023101 6,078 0 0.00 212 1.92 0.0440
2013-08-15 2013-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 20,410 14,332 1,727 0.3588
2013-05-21 2013-03-31 13F JANUS FUND FD 471023101 6,078 6,078 208 0.0436
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.