Thermo Fisher Scientific Inc.
US ˙ NYSE ˙ US8835561023

SecurityTMO / Thermo Fisher Scientific Inc.
InstitutionVestmark Advisory Solutions, Inc.
Latest Disclosed Ownership23,464 shares
Latest Disclosed Value $ 11,533,920
Vestmark Advisory Solutions, Inc. reports 26.53% increase in ownership of TMO / Thermo Fisher Scientific Inc.

On May 15, 2026 - Vestmark Advisory Solutions, Inc. filed a 13F-HR form disclosing ownership of 23,464 shares of Thermo Fisher Scientific Inc. (US:TMO) valued at $11,533,260 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 18,544 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of 26.53% during the quarter. The current value of the position is $11,120,763 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)
2026-05-15 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 23,464 4,920 26.53 11,534 7.33 0.0793
2026-02-06 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 18,544 9,416 103.16 10,745 142.72 0.1450
2025-11-10 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,128 1,028 12.69 4,428 34.81 0.0844
2025-08-06 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,100 -6,391 -44.10 3,284 -54.45 0.0474
2025-05-13 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 14,491 7,235 99.71 7,211 91.04 0.1857
2025-02-06 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,256 -710 -8.91 3,775 -23.40 0.1300
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 7,966 1,367 20.72 4,928 35.02 0.1834
2024-08-12 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,599 769 13.19 3,649 7.70 0.1524
2024-05-15 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,830 -913 -13.54 3,388 72.24 0.1459
2024-02-06 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,743 3,714 122.61 1,968 28.31 0.1000
2023-11-06 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 3,029 -8,176 -72.97 1,533 -73.78 0.1115
2023-08-07 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 11,205 830 8.00 5,846 -2.24 0.2226
2023-05-09 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 10,375 -254 -2.39 5,980 2.17 0.2590
2023-01-20 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 10,629 1,500 16.43 5,854 26.39 0.2852
2022-11-03 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 9,129 141 1.57 4,631 -5.16 0.2581
2022-08-04 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 8,988 1,908 26.95 4,883 16.76 0.2789
2022-04-27 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 7,080 326 4.83 4,182 -7.21 0.2367
2022-01-31 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 6,754 1,001 17.40 4,507 37.12 0.2543
2021-11-15 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,753 406 7.59 3,287 21.83 0.2226
2021-08-09 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,347 -9 -0.17 2,698 10.39 0.1920
2021-05-10 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,356 -348 -6.10 2,444 -8.02 0.2168
2021-02-04 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,704 -11 -0.19 2,657 5.31 0.2981
2020-10-19 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,715 169 3.05 2,523 25.52 0.3389
2020-08-13 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,546 96 1.76 2,010 30.01 0.3110
2020-05-06 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 5,450 5,450 1,546 0.3022
2020-02-14 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -6,092 -100.00 0 -100.00
2019-11-05 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,092 416 7.33 1,774 6.42 0.2876
2019-08-20 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 5,676 677 13.54 1,667 21.86 0.2852
2019-05-14 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 4,999 4,999 1,368 0.2439
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.