Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionPerennial Advisors, LLC
Latest Disclosed Ownership16,820 shares
Latest Disclosed Value $ 8,267,447
Perennial Advisors, LLC reports 0.59% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On April 13, 2026 - Perennial Advisors, LLC filed a 13F-HR form disclosing ownership of 16,820 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $8,267,447 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 12, 2026 disclosing 16,722 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 0.59% 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)
2026-04-13 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,820 98 0.59 8,267 -14.68 1.3833
2026-01-12 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,722 611 3.79 9,690 24.00 1.6246
2025-10-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,111 132 0.83 7,814 20.62 1.3534
2025-07-15 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 15,979 242 1.54 6,479 -17.27 1.2036
2025-04-14 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 15,737 197 1.27 7,831 -3.14 1.5621
2025-02-21 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 15,540 544 3.63 8,085 -2.51 1.7596
2024-07-23 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 14,996 380 2.60 8,293 -2.38 1.8588
2024-04-10 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 14,616 47 0.32 8,495 9.86 1.9758
2024-01-25 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 14,569 -1,014 -6.51 7,733 -1.97 1.9002
2023-10-17 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 15,583 29 0.19 7,888 -2.81 2.1273
2023-08-01 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 15,554 669 4.49 8,115 -5.41 2.0687
2023-05-12 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 14,885 93 0.63 8,579 5.32 2.4550
2023-01-31 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 14,792 -1,146 -7.19 8,146 0.77 2.5894
2022-11-09 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 15,938 -118 -0.73 8,084 -7.33 2.6507
2022-08-09 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 16,056 -128 -0.79 8,723 -8.75 2.7139
2022-04-27 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 16,184 367 2.32 9,559 -9.43 2.5365
2022-02-08 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 15,817 234 1.50 10,554 18.54 2.8441
2021-11-08 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 15,583 255 1.66 8,903 15.14 2.6221
2021-08-13 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 15,328 599 4.07 7,732 15.03 2.2444
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 14,729 -10 -0.07 6,722 -2.08 2.1147
2021-02-12 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 14,739 -10 -0.07 6,865 5.42 2.4181
2020-11-16 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 14,749 -20 -0.14 6,512 21.67 2.6650
2020-08-14 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 14,769 155 1.06 5,352 29.15 2.2755
2020-05-19 2020-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 14,614 726 5.23 4,144 -8.16 2.3086
2020-05-19 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 11,575 -2,313 1,633 1,355,873.0976
2020-01-23 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,888 -307 -2.16 4,512 9.12 2.1666
2019-11-05 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 14,195 -19 -0.13 4,135 -0.93 2.1424
2019-07-18 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 14,214 226 1.62 4,174 9.01 2.2223
2019-04-30 2019-03-31 13F THERMO FISHER SCIENTIFIC I COM 883556102 13,988 343 2.51 3,829 25.38 2.1773
2019-01-29 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,645 181 1.34 3,054 -7.06 1.9773
2018-11-05 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,464 -144 -1.06 3,286 16.57 1.8913
2018-08-10 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,608 117 0.87 2,819 1.22 1.7380
2018-04-24 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,491 -321 -2.32 2,785 6.18 1.7578
2018-01-29 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 13,812 376 2.80 2,623 3.19 1.6284
2017-10-30 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 13,436 772 6.10 2,542 15.07 1.7199
2017-07-31 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 12,664 345 2.80 2,209 16.75 1.6031
2017-04-27 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 12,319 744 6.43 1,892 15.86 1.4565
2017-04-27 2016-12-31 13F/A-2 THERMO FISHER SCIENTIFIC COM 883556102 11,575 11,575 1,633 1.3559
2017-04-27 2016-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 11,575 0 1,633 1.4437
2017-02-10 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 15,938 2,249 1.4222
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.