Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionIsthmus Partners, Llc
Latest Disclosed Ownership1,020 shares
Latest Disclosed Value $ 501,361
Isthmus Partners, Llc reports 12.82% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On April 29, 2026 - Isthmus Partners, Llc filed a 13F-HR form disclosing ownership of 1,020 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $501,361 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 1,170 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -12.82% 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)
2026-04-29 2026-03-31 13F Thermo Fisher Scientific COM 883556102 1,020 -150 -12.82 501 -26.00 0.0526
2026-02-05 2025-12-31 13F THERMO FISHER SCNTFC COM 883556102 1,170 0 0.00 678 19.40 0.0753
2025-11-10 2025-09-30 13F THERMO FISHER SCNTFC COM 883556102 1,170 0 0.00 567 19.62 0.1259
2025-08-13 2025-06-30 13F THERMO FISHER SCNTFC COM 883556102 1,170 0 0.00 474 -18.56 0.0554
2025-05-01 2025-03-31 13F THERMO FISHER SCNTFC COM 883556102 1,170 -268 -18.64 582 -22.19 0.0729
2025-02-07 2024-12-31 13F THERMO FISHER SCNTFC COM 883556102 1,438 868 152.28 748 112.50 0.0909
2024-11-14 2024-09-30 13F THERMO FISHER SCNTFC COM 883556102 570 0 0.00 353 11.75 0.0419
2024-08-14 2024-06-30 13F/A-1 THERMO FISHER SCNTFC COM 883556102 570 0 0.00 315 -4.83 0.0371
2024-05-08 2024-03-31 13F THERMO FISHER SCNTFC COM 883556102 570 -2 -0.35 331 9.24 0.0376
2024-02-12 2023-12-31 13F THERMO FISHER SCNTFC COM 883556102 572 0 0.00 304 4.84 0.0395
2023-11-14 2023-09-30 13F THERMO FISHER SCNTFC COM 883556102 572 -5 -0.87 290 -3.99 0.0418
2023-08-03 2023-06-30 13F THERMO FISHER SCNTFC COM 883556102 577 5 0.87 301 -8.51 0.0411
2023-05-11 2023-03-31 13F THERMO FISHER SCNTFC COM 883556102 572 0 0.00 330 4.78 0.0465
2023-02-10 2022-12-31 13F THERMO FISHER SCNTFC COM 883556102 572 0 0.00 315 8.28 0.0473
2022-11-14 2022-09-30 13F THERMO FISHER SCNTFC COM 883556102 572 0 0.00 290 -6.75 0.0499
2022-08-08 2022-06-30 13F THERMO FISHER SCNTFC COM 883556102 572 0 0.00 311 -7.99 0.0581
2022-05-04 2022-03-31 13F THERMO FISHER SCNTFC COM 883556102 572 2 0.35 338 -11.05 0.0556
2022-01-25 2021-12-31 13F THERMO FISHER SCNTFC COM 883556102 570 0 0.00 380 16.56 0.0637
2021-11-10 2021-09-30 13F THERMO FISHER SCNTFC COM 883556102 570 0 0.00 326 13.19 0.0591
2021-08-10 2021-06-30 13F THERMO FISHER SCNTFC COM 883556102 570 0 0.00 288 10.77 0.0507
2021-05-17 2021-03-31 13F THERMO FISHER SCNTFC COM 883556102 570 0 0.00 260 -1.89 0.0477
2021-02-16 2020-12-31 13F THERMO FISHER SCNTFC COM 883556102 570 0 0.00 265 5.16 0.0538
2020-11-04 2020-09-30 13F THERMO FISHER SCNTFC COM 883556102 570 0 0.00 252 21.74 0.0589
2020-08-14 2020-06-30 13F/A-1 THERMO FISHER SCNTFC COM 883556102 570 570 207 0.0510
2020-08-10 2020-06-30 13F THERMO FISHER SCNTFC COM 883556102 570 570 207 49,975.6158
2019-08-09 2019-06-30 13F UNITED PARCEL SVC COM 883556102 0 -64,508 -100.00 0 -100.00
2019-04-19 2019-03-31 13F UNITED PARCEL SVC COM 883556102 64,508 64,508 7,208 1.7552
2017-08-11 2017-06-30 13F THERMO FISHER SCNTFC COM 883556102 0 -100 -100.00 0 -100.00
2017-05-10 2017-03-31 13F THERMO FISHER SCNTFC COM 883556102 100 100 15 0.0044
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.