Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionWimmer Associates 1, Llc
Latest Disclosed Ownership1,486 shares
Latest Disclosed Value $ 730,414
Wimmer Associates 1, Llc reports 4.80% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 15, 2026 - Wimmer Associates 1, Llc filed a 13F-HR form disclosing ownership of 1,486 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $730,414 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,561 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -4.80% 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 1,486 -75 -4.80 730 -19.25 0.3569
2026-02-13 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,561 -1 -0.06 905 19.42 0.4206
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,562 0 0.00 758 19.59 0.3642
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,562 0 0.00 633 -5.52 0.3238
2025-05-15 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,562 -15 -0.95 670 -18.29 0.3534
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,577 -10 -0.63 820 -16.41 0.4056
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,587 0 0.00 982 11.86 0.4806
2024-08-13 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,587 -25 -1.55 878 -6.30 0.4499
2024-05-14 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,612 0 0.00 937 9.47 0.4927
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,612 0 0.00 856 4.91 0.4826
2023-11-14 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,612 -10 -0.62 816 -3.66 0.5092
2023-08-14 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,622 0 0.00 846 -0.35 0.5091
2023-05-16 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,622 -239 -12.84 849 -17.09 0.5424
2023-02-14 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,861 -70 -3.63 1,025 3.23 0.6764
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,931 -65 -3.26 992 -8.49 0.6566
2022-08-12 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,996 45 2.31 1,084 -5.90 0.7064
2022-05-13 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,951 -10 -0.51 1,152 -11.93 0.6404
2022-02-16 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,961 0 0.00 1,308 16.79 0.7011
2021-11-12 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,961 -105 -5.08 1,120 7.49 0.6637
2021-08-12 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,066 -735 -26.24 1,042 -18.47 0.6111
2021-05-14 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,801 725 34.92 1,278 32.16 0.6955
2021-02-16 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,076 -752 -26.59 967 -22.58 0.5767
2020-12-03 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,828 760 36.75 1,249 47.29 0.8412
2020-08-14 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,068 -773 -27.21 848 5.21 0.6595
2020-05-15 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,841 180 6.76 806 -6.71 0.7499
2020-02-13 2019-12-31 13F Thermo Fisher Scientific COM 883556102 2,661 -125 -4.49 864 6.54 0.6920
2019-11-14 2019-09-30 13F Thermo Fisher Scientific COM 883556102 2,786 -105 -3.63 811 -4.48 0.7074
2019-08-14 2019-06-30 13F Thermo Fisher Scientific COM 883556102 2,891 0 0.00 849 7.33 0.7421
2019-05-15 2019-03-31 13F Thermo Fisher Scientific COM 883556102 2,891 0 0.00 791 22.26 0.7014
2019-02-14 2018-12-31 13F Thermo Fisher Scientific COM 883556102 2,891 -30 -1.03 647 -9.26 0.6407
2018-11-13 2018-09-30 13F Thermo Fisher Scientific COM 883556102 2,921 -25 -0.85 713 16.89 0.5934
2018-08-14 2018-06-30 13F Thermo Fisher Scientific COM 883556102 2,946 -60 -2.00 610 -1.77 0.5439
2018-05-10 2018-03-31 13F Thermo Fisher Scientific COM 883556102 3,006 75 2.56 621 11.49 0.5474
2018-02-14 2017-12-31 13F Thermo Fisher Scientific COM 883556102 2,931 -200 -6.39 557 -5.91 0.5015
2017-11-14 2017-09-30 13F Thermo Fisher Scientific COM 883556102 3,131 0 0.00 592 8.42 0.5455
2017-08-11 2017-06-30 13F Thermo Fisher Scientific COM 883556102 3,131 0 0.00 546 13.51 0.5030
2017-05-09 2017-03-31 13F Thermo Fisher Scientific COM 883556102 3,131 40 1.29 481 10.32 0.4499
2017-02-14 2016-12-31 13F Thermo Fisher Scientific COM 883556102 3,091 0 0.00 436 -11.38 0.4040
2016-11-10 2016-09-30 13F Thermo Fisher Scientific COM 883556102 3,091 -115 -3.59 492 3.80 0.4428
2016-08-11 2016-06-30 13F Thermo Fisher Scientific COM 883556102 3,206 35 1.10 474 5.57 0.4229
2016-05-16 2016-03-31 13F Thermo Fisher Scientific COM 883556102 3,171 140 4.62 449 4.42 0.4114
2016-02-16 2015-12-31 13F Thermo Fisher Scientific COM 883556102 3,031 3,031 430 0.4511
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.