Thermo Fisher Scientific Inc.
US ˙ NYSE ˙ US8835561023

SecurityTMO / Thermo Fisher Scientific Inc.
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership550,207 shares
Latest Disclosed Value $ 270,443
Natixis Advisors, L.p. reports 6.56% decrease in ownership of TMO / Thermo Fisher Scientific Inc.

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 550,207 shares of Thermo Fisher Scientific Inc. (US:TMO) valued at $270,443,247 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 588,805 shares of Thermo Fisher Scientific Inc.. This represents a change in shares of -6.56% during the quarter. The current value of the position is $260,770,608 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)
2026-05-13 2026-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 550,207 -38,598 -6.56 270 -20.82 0.3762
2026-02-10 2025-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 588,805 106,375 22.05 341 46.35 0.4835
2025-11-13 2025-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 482,430 75,993 18.70 234 42.07 0.3414
2025-08-13 2025-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 406,437 -90,883 -18.27 165 -33.60 0.2615
2025-05-08 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 497,320 68,455 15.96 247 10.76 0.4573
2025-02-10 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 428,865 -73,218 -14.58 223 -28.06 0.4169
2024-11-06 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 502,083 84,710 20.30 311 34.78 0.6056
2024-08-01 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 417,373 40,942 10.88 231 5.50 0.5018
2024-04-25 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 376,431 43,333 13.01 219 23.86 0.5030
2024-02-06 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 333,098 4,214 1.28 177 6.02 0.4654
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 328,884 59,716 22.19 166 18.57 0.5091
2023-08-15 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 269,168 -9,276 -3.33 140 -12.50 0.4336
2023-05-11 2023-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 278,444 27,213 10.83 160 15.94 0.5523
2023-01-27 2022-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 251,231 30,706 13.92 138 -99.88 0.5230
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 220,525 25,639 13.16 111,848 5.64 0.4731
2022-08-12 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 194,886 7,144 3.81 105,878 -4.52 0.4656
2022-05-12 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 187,742 -66,239 -26.08 110,890 -34.57 0.4229
2022-02-08 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 253,981 3,431 1.37 169,466 18.39 0.6471
2021-11-15 2021-09-30 13F THERMO FISHER SCIENTIFIC SPONSORED ADR 883556102 250,550 6,056 2.48 143,147 16.06 0.5887
2021-08-12 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 244,494 36,479 17.54 123,340 29.92 0.5757
2021-05-05 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 208,015 -30,607 -12.83 94,934 -14.59 0.4955
2021-02-12 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 238,622 9,200 4.01 111,146 9.73 0.6403
2020-11-12 2020-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 229,422 -31,691 -12.14 101,294 7.06 0.6374
2020-08-11 2020-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 261,113 29,478 12.73 94,612 44.02 0.6279
2020-04-27 2020-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 231,635 17,927 8.39 65,692 -5.38 0.5354
2020-02-10 2019-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 213,708 -6,467 -2.94 69,427 8.26 0.4897
2019-11-12 2019-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 220,175 6,101 2.85 64,131 2.01 0.5090
2019-08-12 2019-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 214,074 8,427 4.10 62,869 11.69 0.5135
2019-05-15 2019-03-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 205,647 7,094 3.57 56,290 26.68 0.4928
2019-05-15 2019-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 205,647 7,094 56,290
2019-02-13 2018-12-31 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 198,553 1,048 0.53 44,434 -7.82 0.4387
2019-02-13 2018-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 198,553 1,048 44,434
2018-11-13 2018-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 197,505 10,443 5.58 48,206 24.41 0.4243
2018-08-14 2018-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 187,062 17,475 10.30 38,748 10.67 0.3702
2018-08-14 2018-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 187,062 38,748
2018-05-10 2018-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 169,587 10,460 6.57 35,013 15.88 0.3456
2018-02-14 2017-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 159,127 5,752 3.75 30,216 4.14 0.3078
2017-11-14 2017-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 153,375 -7,790 -4.83 29,016 3.19 0.3065
2017-07-27 2017-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 161,165 -7,956 -4.70 28,118 8.24 0.3043
2017-05-12 2017-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 169,121 16,322 10.68 25,977 20.49 0.2878
2017-02-07 2016-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 152,799 10,771 7.58 21,560 -4.56 0.2592
2016-11-04 2016-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 142,028 -13,666 -8.78 22,590 -1.80 0.2926
2016-08-01 2016-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 155,694 -2,603 -1.64 23,005 2.64 0.3180
2016-05-06 2016-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 158,297 21,998 16.14 22,413 15.92 0.3354
2016-02-12 2015-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 136,299 38,414 39.24 19,335 61.54 0.3170
2015-11-12 2015-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 97,885 12,446 14.57 11,969 7.97 0.2076
2015-08-14 2015-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 85,439 13,412 18.62 11,086 14.57 0.1882
2015-05-15 2015-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 72,027 13,710 23.51 9,676 32.42 0.1698
2015-02-05 2014-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 58,317 2,073 3.69 7,307 6.75 0.1368
2014-11-03 2014-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 56,244 2,367 4.39 6,845 7.68 0.1374
2014-08-13 2014-06-30 13F THERMO FISHER COM 883556102 53,877 1,992 3.84 6,357 1.91 0.0911
2014-05-13 2014-03-31 13F THERMO FISHER COM 883556102 51,885 -9,623 -15.65 6,238 -8.92 0.0960
2014-02-12 2013-12-31 13F THERMO FISHER COM 883556102 61,508 2,065 3.47 6,849 25.03 0.1121
2013-10-30 2013-09-30 13F THERMO FISHER COM 883556102 59,443 13,505 29.40 5,478 40.90 0.1009
2013-07-19 2013-06-30 13F THERMO FISHER COM 883556102 45,938 45,938 3,888 0.0775
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.