Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionGladstone Institutional Advisory LLC
Latest Disclosed Ownership5,434 shares
Latest Disclosed Value $ 2,671,163
Gladstone Institutional Advisory LLC reports 63.33% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On May 14, 2026 - Gladstone Institutional Advisory LLC filed a 13F-HR form disclosing ownership of 5,434 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $2,671,163 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,327 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 63.33% 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)
2026-05-14 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,434 2,107 63.33 2,671 38.61 0.0990
2026-02-17 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,327 -742 -18.24 1,928 -2.33 0.0728
2025-10-22 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 4,069 -1,921 -32.07 1,974 -18.74 0.0760
2025-08-12 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,990 431 7.75 2,429 -12.22 0.1003
2025-05-15 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,559 -9 -0.16 2,766 -4.49 0.1289
2025-01-29 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,568 -318 -5.40 2,897 -20.46 0.1344
2024-10-28 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,886 -748 -11.28 3,641 -0.74 0.1778
2024-08-02 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,634 46 0.70 3,669 -4.20 0.1911
2024-05-14 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,588 -1,577 -19.31 3,829 -11.63 0.2101
2024-02-09 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,165 535 7.01 4,334 12.20 0.2431
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,630 1,827 31.48 3,862 27.59 0.2501
2023-08-10 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,803 -746 -11.39 3,028 -19.79 0.1846
2023-05-12 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,549 -494 -7.01 3,774 -2.68 0.2444
2023-02-01 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,043 1,171 19.94 3,879 30.22 0.2737
2023-01-30 2022-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 5,872 3,189 118.86 2,978 104.25 0.2328
2022-10-20 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,872 3,189 2,978 0.2328
2023-01-30 2022-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 2,683 -1,284 -32.37 1,458 -37.77 0.1153
2022-08-15 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,683 -1,284 1,458 0.1153
2023-01-30 2022-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 3,967 -4,884 -55.18 2,343 -60.32 0.1584
2022-05-04 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,967 -4,884 2,343 0.1584
2023-01-30 2021-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 8,851 3,084 53.48 5,905 79.21 0.4575
2022-02-11 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,851 3,084 5,905 0.4575
2023-01-30 2021-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 5,767 3,909 210.39 3,295 251.65 0.3218
2021-11-15 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,767 3,909 3,295 0.3218
2023-01-30 2021-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 1,858 955 105.76 937 127.43 0.1113
2021-08-13 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,858 955 937 0.1113
2023-01-30 2021-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 903 272 43.11 412 40.14 0.0640
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 903 272 412 0.0640
2023-01-30 2020-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 631 631 294 0.0586
2021-02-16 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 631 631 294 0.0586
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.