Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionMarks Group Wealth Management, Inc
Latest Disclosed Ownership4,424 shares
Latest Disclosed Value $ 2,174,528
Marks Group Wealth Management, Inc reports 18.04% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 5, 2026 - Marks Group Wealth Management, Inc filed a 13F-HR form disclosing ownership of 4,424 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $2,174,528 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 5,398 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -18.04% 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)
2026-05-05 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,424 -974 -18.04 2,175 -30.48 0.2097
2026-02-11 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,398 47 0.88 3,128 20.50 0.2995
2025-11-10 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,351 -4,341 -44.79 2,595 -33.95 0.2411
2025-07-22 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,692 305 3.25 3,930 -15.87 0.3655
2025-05-01 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,387 296 3.26 4,671 -1.25 0.4495
2025-01-29 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,091 271 3.07 4,729 -13.31 0.4658
2024-10-30 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,820 -752 -7.86 5,456 3.06 0.5208
2024-08-14 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,572 307 3.31 5,293 -1.69 0.5575
2024-04-29 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 9,265 408 4.61 5,385 14.53 0.5629
2024-02-01 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,857 504 6.03 4,701 11.19 0.5358
2023-10-30 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,353 -101 -1.19 4,228 -4.13 0.5234
2023-07-19 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,454 -34 -0.40 4,411 -9.85 0.5246
2023-05-03 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,488 160 1.92 4,892 6.67 0.6251
2023-02-06 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 8,328 2,910 53.71 4,586 66.89 0.6261
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,418 23 0.43 2,748 -6.24 0.4182
2022-08-09 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,395 45 0.84 2,931 -7.25 0.4227
2022-05-10 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,350 268 5.27 3,160 -6.59 0.3287
2022-03-03 2021-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 5,082 23 0.45 3,383 16.41 0.4123
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,082 23 2,702 0.4998
2021-11-15 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,059 1,003 24.73 2,906 34.72 0.3931
2021-08-10 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 4,056 63 1.58 2,157 20.57 0.2961
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,993 149 3.88 1,789 -0.06 0.2651
2021-02-08 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 3,844 134 3.61 1,790 9.28 0.2789
2020-11-10 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,710 123 3.43 1,638 26.19 0.2959
2020-08-10 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,587 1,291 56.23 1,298 98.47 0.2638
2020-04-23 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,296 51 2.27 654 -10.29 0.1689
2020-02-12 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,245 2,245 729 0.1434
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.