Thermo Fisher Scientific Inc.
US ˙ NYSE ˙ US8835561023

SecurityTMO / Thermo Fisher Scientific Inc.
InstitutionSummit Trail Advisors, Llc
Latest Disclosed Ownership13,108 shares
Latest Disclosed Value $ 6,442,976
Summit Trail Advisors, Llc reports 38.87% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On May 12, 2026 - Summit Trail Advisors, Llc filed a 13F-HR form disclosing ownership of 13,108 shares of Thermo Fisher Scientific Inc. (US:TMO) valued at $6,442,975 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 9,439 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 38.87% during the quarter. The current value of the position is $6,212,537 USD.

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)
2026-05-12 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,108 3,669 38.87 6,443 17.71 0.0923
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,439 -1,668 -15.02 5,473 1.52 0.0946
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,107 2,357 26.94 5,392 51.82 0.0745
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,750 8,750 3,552 0.0610
2025-01-29 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -5,378 -100.00 0 -100.00
2024-11-12 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,378 1,214 29.15 3,329 44.44 0.0825
2024-08-13 2024-06-30 13F Thermo Fisher Scientific COM 883556102 4,164 157 3.92 2,304 -1.12 0.0606
2024-04-23 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,007 488 13.87 2,330 24.67 0.0619
2024-02-06 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,519 -161 -4.38 1,869 0.27 0.0618
2023-10-30 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,680 -14 -0.38 1,864 -3.32 0.0686
2023-07-25 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,694 1,743 89.34 1,929 71.38 0.0728
2023-05-04 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,951 -34 -1.71 1,125 2.93 0.0453
2023-02-07 2022-12-31 13F Thermo Fisher Scientific COM 883556102 1,985 74 3.87 1,094 12.68 0.0486
2022-11-10 2022-09-30 13F Thermo Fisher Scientific Stock 883556102 1,911 230 13.68 970 6.13 0.0525
2022-08-09 2022-06-30 13F Thermo Fisher Scientific COM 883556102 1,681 110 7.00 914 -1.51 0.0565
2022-05-16 2022-03-31 13F Thermo Fisher Scientific EQUITY 883556102 1,571 430 37.69 928 21.78 0.0751
2022-02-11 2021-12-31 13F Thermo Fisher Scientific Equity 883556102 1,141 -91 -7.39 762 8.24 0.0491
2021-11-16 2021-09-30 13F Thermo Fisher Scientific COM 883556102 1,232 73 6.30 704 20.34 0.0528
2021-08-16 2021-06-30 13F Thermo Fisher Scientific Equity 883556102 1,159 172 17.43 585 29.71 0.0512
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC Equity 883556102 987 -75 -7.06 451 -8.89 0.0486
2021-02-16 2020-12-31 13F THERMO FISHER SCIENTIFIC Equity 883556102 1,062 -429 -28.77 495 -31.72 0.0624
2020-11-16 2020-09-30 13F/A-1 Thermo Fisher Scientific Equity 883556102 1,491 417 38.83 725 86.38 0.1402
2020-08-13 2020-06-30 13F Thermo Fisher Scientific Equity 883556102 1,074 -69 -6.04 389 20.06 0.0726
2020-05-15 2020-03-31 13F Thermo Fisher Scientific Equity 883556102 1,143 1,143 324 0.0872
2018-08-10 2018-06-30 13F THERMO FISHER SCIENTIFIC INC COM EQUITY 883556102 0 -4,120 -100.00 0 -100.00
2018-05-22 2018-03-31 13F/A-1 THERMO FISHER SCIENTIFIC INC COM EQUITY 883556102 4,120 1,041 33.81 545 -15.90 0.0925
2018-05-21 2018-03-31 13F THERMO FISHER SCIENTIFIC INC COM EQUITY 883556102 544,587 541,508 545
2018-02-14 2017-12-31 13F THERMO FISHER SCIENTIFIC EQUITY 883556102 3,079 3,079 648 0.0818
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.