Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionGeneration Investment Management Llp
Latest Disclosed Ownership773,600 shares
Latest Disclosed Value $ 380,247,608
Generation Investment Management Llp reports 30.39% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 14, 2026 - Generation Investment Management Llp filed a 13F-HR form disclosing ownership of 773,600 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $380,247,608 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,111,327 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -30.39% 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 773,600 -337,727 -30.39 380,248 -40.95 3.4077
2026-02-12 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,111,327 -173,597 -13.51 643,958 3.33 4.4666
2025-11-10 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,284,924 295,984 29.93 623,214 55.42 4.1285
2025-08-07 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 988,940 -201,621 -16.93 400,976 -32.32 2.5490
2025-05-15 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,190,561 -381,173 -24.25 592,423 -27.55 3.5779
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,571,734 -15,440 -0.97 817,663 -16.72 4.2654
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,587,174 -67,545 -4.08 981,778 7.29 4.5861
2024-08-13 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,654,719 -718 -0.04 915,060 -4.89 4.4045
2024-05-14 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,655,437 -125,798 -7.06 962,157 1.77 4.3918
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,781,235 117,222 7.04 945,462 12.25 4.2862
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,664,013 57,224 3.56 842,273 0.47 4.4323
2023-08-11 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,606,789 123,678 8.34 838,342 -1.93 4.0602
2023-05-12 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,483,111 597,253 67.42 854,821 75.23 4.5519
2023-02-13 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 885,858 -5,703 -0.64 487,833 7.88 2.8163
2022-11-10 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 891,561 -4,327 -0.48 452,191 -7.09 2.6828
2022-08-12 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 895,888 16,359 1.86 486,718 -6.31 2.6528
2022-05-13 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 879,529 -324,116 -26.93 519,494 -35.32 2.3788
2022-02-11 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,203,645 -480,851 -28.55 803,120 -16.55 3.3007
2021-11-12 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,684,496 -22,031 -1.29 962,403 11.79 4.0010
2021-08-16 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,706,527 688,019 67.55 860,892 85.21 3.5700
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,018,508 -2,838 -0.28 464,827 -2.29 1.9485
2021-02-16 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,021,346 -162,409 -13.72 475,723 -8.98 2.1226
2020-11-16 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,183,755 -460,722 -28.02 522,652 -12.29 2.7741
2020-08-14 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,644,477 -267,557 -13.99 595,860 9.89 3.4373
2020-05-15 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,912,034 -158,569 -7.66 542,253 -19.39 3.8493
2020-02-14 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,070,603 -69,210 -3.23 672,677 7.93 4.3021
2019-11-18 2019-09-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 2,139,813 -128,318 -5.66 623,263 -6.43 4.2852
2019-11-14 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,139,813 -128,318 623,263 4,397,858.1096
2019-08-14 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,268,131 -276,999 -10.88 666,105 -4.38 4.5920
2019-05-15 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,545,130 -473,349 -15.68 696,653 3.13 5.0929
2019-02-14 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,018,479 -1,716 -0.06 675,505 -8.36 5.6657
2018-11-14 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,020,195 45,150 1.52 737,169 19.62 5.8824
2018-08-14 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,975,045 79,554 2.75 616,251 3.09 5.4376
2018-05-15 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,895,491 38,585 1.35 597,803 10.20 5.8268
2018-02-14 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,856,906 -53,973 -1.85 542,469 -1.50 5.2565
2017-11-14 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,910,879 -17,639 -0.60 550,738 7.79 5.2913
2017-08-14 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,928,518 460,823 18.67 510,939 34.80 5.2028
2017-05-15 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,467,695 -13,774 -0.56 379,038 8.25 4.1498
2017-02-14 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,481,469 1,667,522 204.87 350,135 170.45 4.0072
2016-11-14 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 813,947 813,947 129,466 1.4020
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.