Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionMcGuire Investment Group, LLC
Latest Disclosed Ownership28,140 shares
Latest Disclosed Value $ 13,831,743
McGuire Investment Group, LLC reports 15.59% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On April 28, 2026 - McGuire Investment Group, LLC filed a 13F-HR form disclosing ownership of 28,140 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $13,831,743 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 33,339 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -15.59% 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)
2026-04-28 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 28,140 -5,199 -15.59 13,832 -28.40 1.5623
2026-01-26 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 33,339 38 0.11 19,318 19.61 2.0644
2025-10-21 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 33,301 -378 -1.12 16,152 18.28 1.8300
2025-07-18 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 33,679 502 1.51 13,656 -17.28 1.7451
2025-04-25 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 33,177 745 2.30 16,509 -2.16 2.4532
2025-01-21 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 32,432 79 0.24 16,872 -15.69 2.4360
2024-10-10 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 32,353 556 1.75 20,013 13.81 2.8181
2024-07-24 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 31,797 73 0.23 17,584 -4.64 2.5210
2024-04-26 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 31,724 -30 -0.09 18,438 9.40 2.6932
2024-01-12 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 31,754 674 2.17 16,855 7.14 2.8117
2023-10-12 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 31,080 725 2.39 15,732 -0.67 3.0334
2023-07-18 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 30,355 -610 -1.97 15,838 -11.26 2.9515
2023-04-20 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 30,965 -1,541 -4.74 17,847 -0.30 3.5471
2023-01-10 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 32,506 6 0.02 17,901 8.59 3.8739
2022-10-13 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 32,500 190 0.59 16,484 -6.09 3.7552
2022-07-15 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 32,310 -214 -0.66 17,553 -8.63 3.7815
2022-04-25 2022-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 32,524 128 0.40 19,210 -11.13 3.5231
2022-04-14 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 32,524 128 19,210 3.5832
2022-01-13 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 32,396 -65 -0.20 21,616 16.55 3.5584
2021-10-19 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 32,461 310 0.96 18,546 14.35 3.4874
2021-07-16 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 32,151 -333 -1.03 16,219 9.40 3.0781
2021-04-20 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 32,484 2,401 7.98 14,825 5.80 3.1280
2021-01-13 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 30,083 29 0.10 14,012 5.59 3.4720
2020-10-19 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 30,054 77 0.26 13,270 22.17 3.9510
2020-07-14 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 29,977 -2,529 -7.78 10,862 17.82 3.7692
2020-04-02 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 32,506 5 0.02 9,219 -12.69 3.8352
2020-01-07 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 32,501 436 1.36 10,559 13.06 3.1358
2019-10-25 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 32,065 197 0.62 9,339 -0.21 3.0621
2019-07-25 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 31,868 277 0.88 9,359 8.23 2.9656
2019-04-23 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 31,591 13 0.04 8,647 22.36 2.8345
2019-01-28 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 31,578 269 0.86 7,067 -7.52 2.6726
2018-11-07 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 31,309 31,309 7,642 2.5253
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.