Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionBoston Private Wealth Llc
Latest Disclosed Ownership2,575 shares
Latest Disclosed Value $ 1,265,752
Boston Private Wealth Llc reports 13.15% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On April 17, 2026 - Boston Private Wealth Llc filed a 13F-HR form disclosing ownership of 2,575 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $1,265,752 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 2,965 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -13.15% 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)
2026-04-17 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,575 -390 -13.15 1,266 -26.37 0.0834
2026-02-04 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,965 -3,331 -52.91 1,718 -43.73 0.1013
2025-11-06 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,296 -47 -0.74 3,054 18.75 0.1643
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,343 6,343 2,572 0.1378
2025-05-14 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -6,815 -100.00 0 -100.00
2025-02-05 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,815 6,815 3,545 0.0662
2024-10-18 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -7,245 -100.00 0 -100.00
2024-08-06 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,245 -1,196 -14.17 4,006 -18.33 0.0992
2024-05-15 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,441 -239 -2.75 4,906 6.49 0.1094
2024-01-30 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,680 601 7.44 4,607 12.64 0.1121
2023-10-23 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,079 -463 -5.42 4,089 -8.24 0.0898
2023-07-24 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,542 -1,264 -12.89 4,457 -21.15 0.0805
2023-05-12 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,806 -615 -5.90 5,652 -1.52 0.0790
2023-02-10 2022-12-31 13F Thermo Fisher Scientific COM 883556102 10,421 -72 -0.69 5,739 7.82 0.0775
2022-11-09 2022-09-30 13F Thermo Fisher Scientific COM 883556102 10,493 3,103 41.99 5,322 32.55 0.0777
2022-08-16 2022-06-30 13F Thermo Fisher Scientific COM 883556102 7,390 273 3.84 4,015 -4.50 0.0618
2022-05-13 2022-03-31 13F Thermo Fisher Scientific COM 883556102 7,117 241 3.50 4,204 -8.35 0.0563
2022-02-15 2021-12-31 13F Thermo Fisher Scientific COM 883556102 6,876 -360 -4.98 4,587 10.96 0.0752
2021-11-09 2021-09-30 13F Thermo Fisher Scientific COM 883556102 7,236 521 7.76 4,134 22.02 0.0531
2021-08-13 2021-06-30 13F Thermo Fisher Scientific COM 883556102 6,715 -240 -3.45 3,388 6.74 0.0430
2021-05-11 2021-03-31 13F Thermo Fisher Scientific COM 883556102 6,955 16 0.23 3,174 -1.79 0.0442
2021-02-10 2020-12-31 13F THERMO FISHER SCIENTIFIC INC C COM 883556102 6,939 334 5.06 3,232 10.84 0.0474
2020-11-10 2020-09-30 13F THERMO FISHER SCIENTIFIC INC C COM 883556102 6,605 1,840 38.61 2,916 68.95 0.0481
2020-08-05 2020-06-30 13F THERMO FISHER SCIENTIFIC INC C COM 883556102 4,765 520 12.25 1,726 43.36 0.0321
2020-05-11 2020-03-31 13F Thermo Fisher Scientific COM 883556102 4,245 -1,052 -19.86 1,204 -30.04 0.0292
2020-02-13 2019-12-31 13F Thermo Fisher Scientific COM 883556102 5,297 1,359 34.51 1,721 50.04 0.0313
2019-11-01 2019-09-30 13F Thermo Fisher Scientific COM 883556102 3,938 149 3.93 1,147 3.05 0.0228
2019-07-10 2019-06-30 13F Thermo Fisher Scientific COM 883556102 3,789 -251 -6.21 1,113 0.63 0.0374
2019-05-14 2019-03-31 13F Thermo Fisher Scientific COM 883556102 4,040 -1,572 -28.01 1,106 -11.94 0.0437
2019-02-14 2018-12-31 13F Thermo Fisher Scientific COM 883556102 5,612 -396 -6.59 1,256 -14.38 0.0536
2018-11-13 2018-09-30 13F Thermo Fisher Scientific COM 883556102 6,008 -216 -3.47 1,467 13.81 0.0519
2018-08-14 2018-06-30 13F Thermo Fisher Scientific COM 883556102 6,224 133 2.18 1,289 2.46 0.0494
2018-05-11 2018-03-31 13F Thermo Fisher Scientific COM 883556102 6,091 -204 -3.24 1,258 5.27 0.0483
2018-02-13 2017-12-31 13F Thermo Fisher Scientific COM 883556102 6,295 238 3.93 1,195 4.28 0.0450
2017-11-13 2017-09-30 13F Thermo Fisher Scientific COM 883556102 6,057 386 6.81 1,146 15.87 0.0441
2017-08-04 2017-06-30 13F Thermo Fisher Scientific COM 883556102 5,671 -163 -2.79 989 10.38 0.0388
2017-05-11 2017-03-31 13F Thermo Fisher Scientific COM 883556102 5,834 -2,612 -30.93 896 -24.83 0.0357
2017-02-15 2016-12-31 13F Thermo Fisher Scientific COM 883556102 8,446 139 1.67 1,192 -9.77 0.0493
2016-11-15 2016-09-30 13F/A-1 Thermo Fisher Scientific COM 883556102 8,307 3 0.04 1,321 7.66 0.0537
2016-11-14 2016-09-30 13F Thermo Fisher Scientific COM 883556102 8,304 0 1,227 0.0501
2016-08-01 2016-06-30 13F Thermo Fisher Scientific COM 883556102 8,304 129 1.58 1,227 6.05 0.0501
2016-05-13 2016-03-31 13F Thermo Fisher Scientific COM 883556102 8,175 1,467 21.87 1,157 21.53 0.0471
2016-02-12 2015-12-31 13F Thermo Fisher Scientific COM 883556102 6,708 2,107 45.79 952 69.09 0.0376
2015-11-12 2015-09-30 13F Thermo Fisher Scientific COM 883556102 4,601 -869 -15.89 563 -20.70 0.0218
2015-08-13 2015-06-30 13F Thermo Fisher Scientific COM 883556102 5,470 -766 -12.28 710 -15.27 0.0235
2015-05-12 2015-03-31 13F Thermo Fisher Scientific COM 883556102 6,236 -70 -1.11 838 6.08 0.0271
2015-02-10 2014-12-31 13F Thermo Fisher Scientific COM 883556102 6,306 6,306 790 0.0255
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.