Thermo Fisher Scientific Inc.
MX ˙ BMV ˙ US8835561023
SecurityMX:TMO / Thermo Fisher Scientific Inc.
InstitutionFactory Mutual Insurance Co
Latest Disclosed Ownership68,285 shares
Latest Disclosed Value $ 33,564,126
Factory Mutual Insurance Co reports 18.79% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 5, 2026 - Factory Mutual Insurance Co filed a 13F-HR form disclosing ownership of 68,285 shares of Thermo Fisher Scientific Inc. (MX:TMO) valued at $33,564,126 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 84,085 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -18.79% 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 68,285 -15,800 -18.79 33,564 -31.11 0.3776
2026-01-23 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 84,085 -14,850 -15.01 48,723 1.54 0.4939
2025-11-10 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 98,935 2,500 2.59 47,985 22.72 0.4673
2025-08-07 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 96,435 5,700 6.28 39,101 -13.40 0.4274
2025-04-17 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 90,735 0 0.00 45,150 -4.35 0.5238
2025-01-24 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 90,735 0 0.00 47,203 -15.90 0.5104
2024-10-10 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 90,735 -36,300 -28.57 56,126 -20.11 0.5805
2024-07-23 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 127,035 -1,200 -0.94 70,250 -5.74 0.8003
2024-04-12 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 128,235 -18,000 -12.31 74,531 -3.98 0.8561
2024-01-23 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 146,235 -9,100 -5.86 77,620 -1.28 0.9640
2023-11-07 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 155,335 0 0.00 78,626 -2.99 1.0968
2023-07-27 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 155,335 0 0.00 81,046 -9.48 1.1955
2023-05-08 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 155,335 -5,100 -3.18 89,530 1.34 1.3993
2023-02-02 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 160,435 4,099 2.62 88,350 11.42 1.3362
2022-11-04 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 156,336 336 0.22 79,292 -6.44 1.3018
2022-08-08 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 156,000 -500 -0.32 84,751 -8.31 1.3894
2022-05-13 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 156,500 -4,400 -2.73 92,436 3.29 1.2500
2022-02-10 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 160,900 -30,442 -15.91 89,493 -18.14 1.2921
2021-11-12 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 191,342 -3,400 -1.75 109,320 11.28 1.3654
2021-07-14 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 194,742 6,928 3.69 98,241 14.61 1.2015
2021-05-10 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 187,814 33,314 21.56 85,714 19.11 1.0966
2021-02-17 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 154,500 4,900 3.28 71,963 8.95 0.9728
2020-10-19 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 149,600 30,000 25.08 66,052 52.42 1.0690
2020-07-13 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 119,600 -1,700 -1.40 43,335 25.97 0.7432
2020-04-16 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 121,300 -43,000 -26.17 34,401 -35.55 0.6533
2020-01-28 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 164,300 0 0.00 53,376 11.53 0.7870
2019-10-22 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 164,300 0 0.00 47,856 -0.82 0.7399
2019-07-16 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 164,300 0 0.00 48,251 6.46 0.5769
2019-04-09 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 164,300 400 0.24 45,321 23.56 0.5352
2019-01-14 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 163,900 0 0.00 36,680 -8.31 0.4706
2018-10-10 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 163,900 -145,200 -46.98 40,003 -37.52 0.4153
2018-07-19 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 309,100 -77,100 -19.96 64,027 -19.70 0.6870
2018-04-05 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 386,200 -5,500 -1.40 79,735 7.21 0.8732
2018-01-16 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 391,700 -6,600 -1.66 74,376 -1.30 0.7780
2017-10-11 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 398,300 -50,900 -11.33 75,359 -3.84 0.8262
2017-07-10 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 449,200 0 0.00 78,372 13.59 0.9065
2017-04-21 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 449,200 0 0.00 68,997 7.35 0.8172
2017-01-19 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 449,200 30,000 7.16 64,271 -3.61 0.7627
2016-10-26 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 419,200 0 0.00 66,678 7.65 0.8245
2016-07-12 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 419,200 15,000 3.71 61,941 8.23 0.8160
2016-04-27 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 404,200 0 0.00 57,231 -0.18 0.7406
2016-01-14 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 404,200 15,000 3.85 57,336 20.48 0.7712
2015-10-14 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 389,200 0 0.00 47,591 -5.77 0.6510
2015-07-21 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 389,200 -10,000 -2.51 50,503 -5.83 0.6596
2015-04-13 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 399,200 6,000 1.53 53,628 8.86 0.7065
2015-01-12 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 393,200 -10,000 -2.48 49,264 0.40 0.6639
2014-11-04 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 403,200 20,000 5.22 49,069 8.52 0.6786
2014-08-12 2014-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 383,200 24,000 6.68 45,218 4.70 0.6183
2014-05-15 2014-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 359,200 0 0.00 43,190 7.98 0.6252
2014-02-04 2013-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 359,200 0 0.00 39,997 20.84 0.5882
2013-10-16 2013-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 359,200 -20,000 -5.27 33,100 3.14 0.5249
2013-07-25 2013-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 379,200 379,200 32,092 0.5260
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.