Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionImpax Asset Management Group plc
Latest Disclosed Ownership117,758 shares
Latest Disclosed Value $ 57,881,590
Impax Asset Management Group plc reports 21.04% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 12, 2026 - Impax Asset Management Group plc filed a 13F-HR form disclosing ownership of 117,758 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $57,881,590 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 149,132 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -21.04% 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)
2026-05-12 2026-03-31 13F Thermo Fisher Scientific Common Stock 883556102 117,758 -31,374 -21.04 57,882 -33.02 0.4035
2026-01-29 2025-12-31 13F Thermo Fisher Scientific Common Stock 883556102 149,132 -899 -0.60 86,415 18.75 0.5406
2025-11-06 2025-09-30 13F Thermo Fisher Scientific Common Stock 883556102 150,031 -20,515 -12.03 72,768 6.32 0.4247
2025-08-08 2025-06-30 13F Thermo Fisher Scientific Common Stock 883556102 170,546 -22,292 -11.56 68,444 -27.92 0.3935
2025-04-29 2025-03-31 13F Thermo Fisher Scientific Common Stock 883556102 192,838 -431,255 -69.10 94,956 -70.66 0.5718
2025-02-04 2024-12-31 13F Thermo Fisher Scientific Common Stock 883556102 624,093 -78,244 -11.14 323,639 -25.31 1.4657
2024-11-06 2024-09-30 13F/A-1 Thermo Fisher Scientific Common Stock 883556102 702,337 -16,734 -2.33 433,315 9.24 1.7060
2024-10-30 2024-09-30 13F Thermo Fisher Scientific Common Stock 883556102 702,337 -16,734 433,315 1.7079
2024-11-08 2024-06-30 13F/A-1 Thermo Fisher Scientific Common Stock 883556102 719,071 14,119 2.00 396,657 -2.96 1.6147
2024-08-05 2024-06-30 13F Thermo Fisher Scientific Common Stock 883556102 719,071 14,119 396,657 1.6164
2024-04-30 2024-03-31 13F Thermo Fisher Scientific Common Stock 883556102 704,952 -48,714 -6.46 408,740 2.39 1.5645
2024-01-26 2023-12-31 13F Thermo Fisher Scientific Common Stock 883556102 753,666 80,567 11.97 399,194 17.43 1.6026
2023-11-07 2023-09-30 13F/A-1 Thermo Fisher Scientific Common Stock 883556102 673,099 -6,505 -0.96 339,941 -3.92 1.5187
2023-11-07 2023-09-30 13F Thermo Fisher Scientific Common Stock 883556102 673,099 339,941
2023-08-07 2023-06-30 13F Thermo Fisher Scientific Common Stock 883556102 679,604 57,737 9.28 353,799 -1.07 1.4219
2023-05-10 2023-03-31 13F Thermo Fisher Scientific Common Stock 883556102 621,867 39,823 6.84 357,612 11.83 1.4941
2023-02-09 2022-12-31 13F Thermo Fisher Scientific Common Stock 883556102 582,044 40,559 7.49 319,779 16.71 1.4307
2022-11-08 2022-09-30 13F Thermo Fisher Scientific Common Stock 883556102 541,485 -1,515 -0.28 273,998 -7.12 1.4083
2022-08-11 2022-06-30 13F/A-2 Thermo Fisher Scientific Common Stock 883556102 543,000 -7,891 -1.43 295,001 -9.34 1.4379
2022-08-02 2022-06-30 13F Thermo Fisher Scientific Common Stock 883556102 550,891 0 325,384 1.3448
2022-05-16 2022-03-31 13F Thermo Fisher Scientific Common Stock 883556102 550,891 53,811 10.83 325,384 -1.90 1.3448
2022-02-14 2021-12-31 13F Thermo Fisher Scientific Common Stock 883556102 497,080 29,750 6.37 331,672 24.22 1.2128
2021-11-12 2021-09-30 13F Thermo Fisher Scientific Common Stock 883556102 467,330 2,949 0.64 267,000 13.97 1.0966
2021-08-05 2021-06-30 13F Thermo Fisher Scientific Common Stock 883556102 464,381 79,397 20.62 234,266 33.33 1.0331
2021-05-14 2021-03-31 13F Thermo Fisher Scientific Common Stock 883556102 384,984 105,342 37.67 175,699 34.89 0.8990
2021-02-16 2020-12-31 13F Thermo Fisher Scientific Common Stock 883556102 279,642 62,863 29.00 130,252 36.09 0.8288
2020-11-12 2020-09-30 13F Thermo Fisher Scientific Common Stock 883556102 216,779 17,743 8.91 95,712 32.71 0.8374
2020-08-14 2020-06-30 13F Thermo Fisher Scientific Common Stock 883556102 199,036 -10,667 -5.09 72,119 21.27 0.7401
2020-05-15 2020-03-31 13F Thermo Fisher Scientific Common Stock 883556102 209,703 85,452 68.77 59,472 47.34 0.7914
2020-02-13 2019-12-31 13F Thermo Fisher Scientific Common Stock 883556102 124,251 15,555 14.31 40,365 27.50 0.4503
2019-11-14 2019-09-30 13F Thermo Fisher Scientific Common Stock 883556102 108,696 7,291 7.19 31,660 6.31 0.4124
2019-08-13 2019-06-30 13F Thermo Fisher Scientific Common Stock 883556102 101,405 -9,765 -8.78 29,781 -2.13 0.3869
2019-05-13 2019-03-31 13F Thermo Fisher Scientific Common Stock 883556102 111,170 -23,198 -17.26 30,429 1.19 0.4188
2019-02-14 2018-12-31 13F Thermo Fisher Scientific Common Stock 883556102 134,368 49,353 58.05 30,070 44.92 0.4901
2018-11-14 2018-09-30 13F Thermo Fisher Scientific Common Stock 883556102 85,015 85,015 20,750 0.2980
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.