써모 피셔 사이언티픽(주)
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionHeadinvest, Llc
Latest Disclosed Ownership2,078 shares
Latest Disclosed Value $ 1,021,424
Headinvest, Llc reports 21.47% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 15, 2026 - Headinvest, Llc filed a 13F-HR form disclosing ownership of 2,078 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $1,021,424 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 2,646 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -21.47% 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)
2026-05-15 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,078 -568 -21.47 1,021 -33.40 0.2095
2026-02-02 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 2,646 1,007 61.44 1,533 93.07 0.3049
2025-11-14 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,639 153 10.30 795 31.89 0.1643
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,486 -70 -4.50 603 -22.22 0.1284
2025-05-15 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,556 223 16.73 774 11.69 0.1505
2025-02-18 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,333 248 22.86 693 3.28 0.1309
2024-11-15 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,085 -39 -3.47 671 8.05 0.1242
2024-08-14 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,124 -7 -0.62 622 -5.48 0.1224
2024-08-14 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,131 126 12.54 657 23.26 0.1283
2024-02-12 2023-12-31 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 1,005 334 49.78 533 60.54 0.1110
2023-12-11 2023-09-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 671 -3 -0.45 333 -9.29 0.0723
2023-08-23 2023-06-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 674 -61 -8.30 367 -13.48 0.0790
2023-05-17 2023-03-31 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 735 78 11.87 424 17.17 0.0929
2023-02-13 2022-12-31 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 657 -21 -3.10 362 4.94 0.0810
2022-12-28 2022-09-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 678 3 0.44 344 -6.27 0.0824
2022-08-12 2022-06-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 675 0 0.00 367 -8.02 0.0817
2022-05-13 2022-03-31 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 675 -2 -0.30 399 -11.73 0.0762
2022-02-11 2021-12-31 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 677 3 0.45 452 17.40 0.0802
2021-11-16 2021-09-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 674 -17 -2.46 385 10.63 0.0730
2021-08-30 2021-06-30 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 691 6 0.88 348 11.54 0.0662
2021-05-13 2021-03-31 13F THERMO FISHER SCIENTIFIC INC COM Stock 883556102 685 4 0.59 312 -1.58 0.0637
2021-02-16 2020-12-31 13F/A-1 Thermo Fisher Scientific COM 883556102 681 159 30.46 317 37.83 0.0673
2021-02-16 2020-12-31 13F Thermo Fisher Scientific COM 883556102 522 230 0.0665
2020-11-24 2020-09-30 13F Thermo Fisher Scientific COM 883556102 522 522 230 0.0665
2020-05-12 2020-03-31 13F/A-1 Thermo Fisher Scientific COM 883556102 0 -649 -100.00 0 -100.00
2020-02-14 2019-12-31 13F Thermo Fisher Scientific COM 883556102 649 649 211 0.0606
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.