Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionARS Investment Partners, LLC
Latest Disclosed Ownership2,750 shares
Latest Disclosed Value $ 1,351,708
ARS Investment Partners, LLC reports 0.43% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On April 16, 2026 - ARS Investment Partners, LLC filed a 13F-HR form disclosing ownership of 2,750 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $1,351,708 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 2,762 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -0.43% 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)
2026-04-16 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,750 -12 -0.43 1,352 -15.56 0.0703
2026-02-05 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,762 57 2.11 1,600 22.04 0.0935
2025-10-15 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,705 0 0.00 1,312 19.62 0.0866
2025-08-11 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,705 -72 -2.59 1,097 -24.10 0.0800
2025-05-14 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,777 0 0.00 1,445 0.00 0.1307
2025-01-16 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,777 0 0.00 1,445 -15.90 0.1302
2024-10-16 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,777 -26 -0.93 1,718 10.77 0.1540
2024-07-17 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,803 -479 -14.59 1,550 -18.72 0.1482
2024-05-02 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,282 0 0.00 1,908 9.47 0.1901
2024-02-14 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,282 0 0.00 1,742 4.88 0.1930
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,282 0 0.00 1,661 -2.98 0.2059
2023-07-11 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,282 75 2.34 1,712 -7.36 0.2001
2023-04-05 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,207 125 4.06 1,848 8.90 0.2219
2023-01-25 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,082 0 0.00 1,697 8.57 0.2258
2022-10-07 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,082 -155 -4.79 1,563 -11.14 0.2149
2022-07-15 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,237 40 1.25 1,759 -6.83 0.2403
2022-05-16 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,197 -115 -3.47 1,888 -14.57 0.1820
2022-02-11 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,312 0 0.00 2,210 16.81 0.2030
2021-11-05 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,312 0 0.00 1,892 13.23 0.1893
2021-08-06 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,312 87 2.70 1,671 13.52 0.1703
2021-05-13 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,225 3 0.09 1,472 -1.93 0.1710
2021-02-09 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,222 0 0.00 1,501 5.48 0.1848
2020-11-12 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,222 0 0.00 1,423 21.94 0.2237
2020-08-13 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,222 0 0.00 1,167 27.68 0.2196
2020-05-12 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,222 0 0.00 914 -12.70 0.2207
2020-02-12 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,222 0 0.00 1,047 11.62 0.1760
2019-11-14 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,222 -50 -1.53 938 -2.39 0.1685
2019-08-12 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,272 -18 -0.55 961 6.66 0.1615
2019-05-09 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,290 0 0.00 901 22.42 0.1631
2019-02-13 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,290 -21 -0.63 736 -8.91 0.1557
2018-11-13 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,311 0 0.00 808 17.78 0.1252
2018-11-13 2018-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 3,311 0 0.00 686 0.29 0.1095
2018-08-13 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,311 0 686
2018-05-04 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,311 0 0.00 684 8.74 0.0838
2018-02-14 2017-12-31 13F THERMO ELECTRON COM 883556102 3,311 -27 -0.81 629 -0.47 0.0761
2017-11-14 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,338 18 0.54 632 9.15 0.0814
2017-08-04 2017-06-30 13F THERMO ELECTRON CS 883556102 3,320 0 0.00 579 13.53 0.0800
2017-05-10 2017-03-31 13F THERMO ELECTRON CS 883556102 3,320 55 1.68 510 10.63 0.0741
2017-02-15 2016-12-31 13F THERMO ELECTRON CS 883556102 3,265 -41,928 -92.78 461 -93.59 0.0710
2016-11-09 2016-09-30 13F Thermo Fisher Scientific COM 883556102 45,193 -268 -0.59 7,188 7.01 1.5758
2016-08-10 2016-06-30 13F Thermo Fisher Scientific COM 883556102 45,461 26,155 135.48 6,717 145.68 1.5046
2016-05-11 2016-03-31 13F Thermo Fisher Scientific COM 883556102 19,306 -1,202 -5.86 2,734 -6.02 0.6407
2016-02-16 2015-12-31 13F Thermo Fisher Scientific COM 883556102 20,508 -142 -0.69 2,909 15.21 0.6830
2015-11-13 2015-09-30 13F Thermo Fisher Scientific COM 883556102 20,650 855 4.32 2,525 -1.71 0.5785
2015-08-11 2015-06-30 13F Thermo Fisher Scientific COM 883556102 19,795 1,190 6.40 2,569 2.80 0.4699
2015-05-13 2015-03-31 13F Thermo Fisher Scientific COM 883556102 18,605 18,605 2,499 0.4643
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.