Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionOppenheimer Asset Management Inc.
Latest Disclosed Ownership65,576 shares
Latest Disclosed Value $ 32,232,574
Oppenheimer Asset Management Inc. reports 7.03% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On April 23, 2026 - Oppenheimer Asset Management Inc. filed a 13F-HR form disclosing ownership of 65,576 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $32,232,574 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 61,270 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 7.03% 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)
2026-04-23 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 65,576 4,306 7.03 32,233 -9.21 0.0921
2026-02-02 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 61,270 1,191 1.98 35,503 21.84 0.4365
2025-11-06 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 60,079 -34,081 -36.19 29,140 -23.68 0.3205
2025-07-31 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 94,160 4,816 5.39 38,178 -14.12 0.4379
2025-04-23 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 89,344 4,605 5.43 44,458 0.85 0.5517
2025-02-05 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 84,739 -5,604 -6.20 44,084 -21.12 0.5358
2024-11-05 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 90,343 7,427 8.96 55,883 21.88 0.6728
2024-08-08 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 82,916 17,913 27.56 45,853 21.37 0.5857
2024-05-07 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 65,003 4,020 6.59 37,780 16.72 0.5536
2024-02-13 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 60,983 -1,808 -2.88 32,369 1.85 0.4503
2023-11-08 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 62,791 2,876 4.80 31,783 1.67 0.4877
2023-08-03 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 59,915 -63 -0.11 31,261 -9.57 0.4598
2023-05-10 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 59,978 4,740 8.58 34,570 13.64 0.5324
2023-02-07 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 55,238 27,346 98.04 30,419 115.02 0.4896
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 27,892 2,653 10.51 14,147 3.17 0.2495
2022-08-08 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 25,239 -99 -0.39 13,712 -8.37 0.2298
2022-05-12 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 25,338 -8,805 -25.79 14,965 -34.30 0.2124
2022-02-02 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 34,143 -75 -0.22 22,779 16.52 0.3020
2021-11-12 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 34,218 579 1.72 19,550 15.21 0.2780
2021-08-03 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 33,639 244 0.73 16,969 11.35 0.2416
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 33,395 -776 -2.27 15,240 -4.25 0.2362
2021-02-11 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 34,171 -2,162 -5.95 15,916 -0.79 0.2658
2020-11-13 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 36,333 1,718 4.96 16,043 27.90 0.3115
2020-08-11 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 34,615 1,806 5.50 12,543 34.80 0.2588
2020-05-08 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 32,809 -841 -2.50 9,305 -14.88 0.2286
2020-02-07 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 33,650 402 1.21 10,932 12.89 0.2309
2019-10-31 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 33,248 -815 -2.39 9,684 -3.21 0.2151
2019-08-09 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 34,063 -1,704 -4.76 10,005 2.19 0.2211
2019-04-24 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 35,767 -7,286 -16.92 9,791 1.63 0.2199
2019-01-30 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 43,053 -2,483 -5.45 9,634 -13.33 0.2387
2018-10-26 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 45,536 -739 -1.60 11,116 15.97 0.2463
2018-08-10 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 46,275 2,549 5.83 9,585 6.17 0.2344
2018-05-09 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 43,726 -2,688 -5.79 9,028 2.80 0.2265
2018-02-07 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 46,414 0 0.00 8,782 0.00 0.2330
2017-11-14 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 46,414 -7,344 -13.66 8,782 -6.39 0.2281
2017-08-09 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 53,758 -3,852 -6.69 9,381 6.00 0.2592
2017-05-15 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 57,610 57,610 8,850 0.2521
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.