Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionCaledonia Investments Plc
Latest Disclosed Ownership111,767 shares
Latest Disclosed Value $ 54,951,363
Caledonia Investments Plc ownership in TMO / Thermo Fisher Scientific Inc.

On April 22, 2026 - Caledonia Investments Plc filed a 13F-HR form disclosing ownership of 111,767 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $54,951,363 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 111,767 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 0.00% 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)
2026-04-22 2026-03-31 13F Thermo Fisher Scientific COMMON 883556102 111,767 0 0.00 54,951 -15.15 6.4200
2026-01-20 2025-12-31 13F Thermo Fisher Scientific COMMON 883556102 111,767 0 0.00 64,765 19.59 7.1774
2025-11-06 2025-09-30 13F Thermo Fisher Scientific COMMON 883556102 111,767 0 0.00 54,158 19.55 5.3287
2025-07-18 2025-06-30 13F Thermo Fisher Scientific COMMON 883556102 111,767 11,500 11.47 45,299 -9.22 4.4540
2025-04-11 2025-03-31 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 49,901 -4.32 5.8036
2025-01-10 2024-12-31 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 52,155 -15.86 6.2381
2024-10-02 2024-09-30 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 61,986 11.92 6.7982
2024-07-19 2024-06-30 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 55,383 -4.87 6.6636
2024-04-12 2024-03-31 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 58,216 9.30 7.5155
2024-01-26 2023-12-31 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 53,266 4.91 7.1887
2023-10-13 2023-09-30 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 50,774 -2.88 7.4473
2023-07-07 2023-06-30 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 52,277 -9.48 7.2159
2023-04-14 2023-03-31 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 57,755 104,907.27 8.4796
2023-01-17 2022-12-31 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 55 -99.89 9.1467
2022-10-21 2022-09-30 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 50,880 -6.69 9.4279
2022-07-15 2022-06-30 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 54,530 -8.01 9.2249
2022-04-15 2022-03-31 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 59,280 -11.42 8.9918
2022-01-11 2021-12-31 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 66,922 16.89 10.2349
2021-10-12 2021-09-30 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 57,252 13.19 10.0050
2021-07-16 2021-06-30 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 50,582 10.45 9.1444
2021-04-20 2021-03-31 13F Thermo Fisher Scientific Common 883556102 100,267 0 0.00 45,798 -1.89 8.8637
2021-01-22 2020-12-31 13F Thermo Fisher Scientific Common 883556102 100,267 -8,500 -7.81 46,680 -2.68 9.4286
2020-10-14 2020-09-30 13F Thermo Fisher Scientific Common 883556102 108,767 0 0.00 47,966 21.85 9.7976
2020-08-25 2020-06-30 13F Thermo Fisher Scientific Common 883556102 108,767 0 0.00 39,364 27.81 8.8940
2020-05-12 2020-03-31 13F Thermo Fisher Scientific Common 883556102 108,767 -31,650 -22.54 30,800 -32.42 8.2779
2020-01-23 2019-12-31 13F Thermo Fisher Scientific Common 883556102 140,417 0 0.00 45,577 11.44 12.1044
2019-10-11 2019-09-30 13F Thermo Fisher Scientific Common 883556102 140,417 -8,500 -5.71 40,898 -6.45 11.4536
2019-07-15 2019-06-30 13F Thermo Fisher Scientific Common 883556102 148,917 0 0.00 43,719 7.25 12.2182
2019-04-15 2019-03-31 13F Thermo Fisher Scientific Common 883556102 148,917 -20,000 -11.84 40,762 7.83 11.6896
2019-01-10 2018-12-31 13F Thermo Fisher Scientific Common 883556102 168,917 0 0.00 37,802 -8.31 12.3554
2018-10-10 2018-09-30 13F Thermo Fisher Scientific Common 883556102 168,917 0 0.00 41,229 17.83 10.7340
2018-07-10 2018-06-30 13F Thermo Fisher Scientific Common 883556102 168,917 0 0.00 34,989 0.33 9.5048
2018-04-12 2018-03-31 13F Thermo Fisher Scientific Common 883556102 168,917 0 0.00 34,875 8.73 9.7609
2018-01-11 2017-12-31 13F Thermo Fisher Scientific Common 883556102 168,917 0 0.00 32,074 0.36 8.8161
2017-10-12 2017-09-30 13F Thermo Fisher Scientific Common 883556102 168,917 0 0.00 31,959 8.44 9.2143
2017-07-11 2017-06-30 13F Thermo Fisher Scientific Common 883556102 168,917 7,000 4.32 29,471 18.50 8.3503
2017-04-13 2017-03-31 13F Thermo Fisher Scientific Common 883556102 161,917 0 0.00 24,870 8.85 7.0026
2017-01-11 2016-12-31 13F Thermo Fisher Scientific Common 883556102 161,917 0 0.00 22,847 -11.29 7.0527
2016-10-24 2016-09-30 13F Thermo Fisher Scientific Common 883556102 161,917 25,000 18.26 25,755 27.30 8.9377
2016-07-12 2016-06-30 13F Thermo Fisher Scientific Common 883556102 136,917 0 0.00 20,231 4.40 7.5696
2016-04-13 2016-03-31 13F Thermo Fisher Scientific Common 883556102 136,917 0 0.00 19,379 -0.22 6.0777
2016-01-12 2015-12-31 13F Thermo Fisher Scientific Common 883556102 136,917 0 0.00 19,421 16.00 6.0533
2015-10-16 2015-09-30 13F Thermo Fisher Scientific Common 883556102 136,917 136,917 16,742 6.0239
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.