Thermo Fisher Scientific Inc.
US ˙ NYSE ˙ US8835561023

SecurityTMO / Thermo Fisher Scientific Inc.
InstitutionRMR Wealth Builders
Latest Disclosed Ownership5,473 shares
Latest Disclosed Value $ 2,690,341
RMR Wealth Builders reports 20.90% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On April 22, 2026 - RMR Wealth Builders filed a 13F-HR form disclosing ownership of 5,473 shares of Thermo Fisher Scientific Inc. (US:TMO) valued at $2,690,144 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 4,527 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 20.90% during the quarter. The current value of the position is $2,593,928 USD.

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)
2026-04-22 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,473 946 20.90 2,690 2.59 0.2119
2026-01-29 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,527 573 14.49 2,623 36.78 0.2098
2025-11-05 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,954 380 10.63 1,918 32.39 0.1605
2025-07-08 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,574 705 24.57 1,449 1.47 0.1317
2025-04-16 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,869 442 18.21 1,428 13.07 0.1503
2025-01-14 2024-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 2,427 329 15.68 1,263 -2.70 0.1305
2025-01-10 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,427 329 1,263 0.1313
2024-10-21 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,098 -426 -16.88 1,298 -7.03 0.1375
2024-07-23 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2,524 341 15.62 1,396 10.02 0.1602
2024-04-15 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,183 325 17.49 1,269 28.60 0.1534
2024-02-06 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,858 432 30.29 986 36.75 0.1386
2023-10-23 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,426 1,426 722 0.1153
2021-08-13 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -20 -100.00 0 -100.00
2021-05-13 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 20 16 400.00 9 350.00 0.0023
2021-02-26 2020-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 4 4 -80.00 2 -77.78 0.0010
2020-11-13 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -2 -100.00 0 -100.00
2020-08-19 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 2 2 1 0.0009
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.